Free APIs a business may use

"All material presented on this website is provided under a Creative Commons Attribution 4.0 International licence, with the exception of: the Commonwealth Coat of Arms the ABS logo material protected by a trade mark unit record data (microdata) content supplied by third parties". CC BY 4.0 permits commercial use with attribution.

"You may reproduce, embed, store and display the text freely, for any non-commercial purpose. Commercial reproduction — printed copies for sale, paid-for apps that bundle the corpus offline — requires no permission from us but a respectful acknowledgement of the source in the colophon is the minimum courtesy." On recitations: "licensed to us by the reciters or their estates for free, non-commercial redistribution at the bitrates we publish."

The developer manual has no terms clause. The service describes itself as "a free API management service for federal agencies" (about).

"You are welcome to use any images with the label “CC0 Public Domain Designation” for any purpose, including commercial and noncommercial uses, free of charge and without additional permission". API docs: "The description field in this response is licensed under a Creative Commons Attribution 4.0 Generic License (CC-By) ... All other data in this response is licensed under a Creative Commons Zero (CC0) 1.0 designation".

"You are free to use descriptive metadata about arXiv e-prints under the terms of the Creative Commons Universal (CC0 1.0) Public Domain Declaration." Descriptive metadata includes "title, abstract, authors, identifiers, and classification terms." Allowed example: "A mobile app that notifies users about e-prints that might be of interest to them".

None available. The terms PDF did not render to text.

"The information on National Weather Service (NWS) Web pages are in the public domain, unless specifically noted otherwise, and may be used without charge for any lawful purpose so long as you do not: 1) claim it is your own (e.g., by claiming copyright for NWS information -- see below), 2) use it in a manner that implies an endorsement or affiliation with NOAA/NWS, or 3) modify its content and then present it as official government material."

"Plain-language permission summary: You may use Data for any lawful personal or commercial purpose, including paid apps, media, analytics, AI, competing products, and resale of original or modified Data, subject to Section 6. You may not use our Data to offer a sports-data API or equivalent data feed that substitutes for the BALLDONTLIE API. For permitted uses, you do not need to contact us for approval, obtain a separate commercial license from us, or credit us". Section 6: "These permissions apply to Data available through your plan".

"The San Francisco Bay Area Rapid Transit District (BART) hereby grants you (Licensee) non-exclusive, limited and revocable rights to use, reproduce, and redistribute BART Data (Data) subject to the following Terms:"

"You may use the BEA API to develop a service or service to search, display, analyze, retrieve, view and otherwise "get" information from BEA data." "You may not use the BEA name, or the like to imply endorsement of any product, service, or entity, not-for-profit, commercial or otherwise."

"This service is free for anyone to use as long as you don't abuse my server."

Terms 3.2: "BigDataCloud provides a single package which is accessible without the use of an API key, and therefore does not require you to create an account, or pay any fees ( Free API Package )." Fair use: "The API must only be used to convert current geo-coordinates obtained with permission from the calling client device."

Terms page would not render.

"The Bureau of Labor Statistics (BLS) is a Federal government agency and everything that we publish, both in hard copy and electronically, is in the public domain, except for previously copyrighted photographs and illustrations." "You are free to use our public domain material without specific permission, although we do ask that you cite the Bureau of Labor Statistics as the source."

"Developers who federate their apps or services on the AT Protocol must adhere to the Bluesky Developer Guidelines in order to communicate with Bluesky services" ... "All services must have a method for deleting content a user has requested to be deleted." The guidelines and the ToS contain no restriction on commercial use; the verdict rests on that absence plus the conditions above.

"You also agree to use our Services for the sole purpose of your professional activity, excluding any use as a non-professional or consumer." On the free plan: "We may suspend, limit, or terminate the free Services for any reason at any time without notice."

terms page did not load. FAQ: "You may use the API only to retrieve and display dynamic content from Zillow. You are not permitted to store information locally."

Bright Sky: "Bright Sky is free-to-use for all purposes." and "the DWD's Terms of Use apply to all data you retrieve through the API." DWD CDC terms (status May 2024): "The Creative Commons BY 4.0 - Licence "CC BY 4.0" apply."

"The purpose of the National Transportation Noise Map is to facilitate USDOT stakeholders, researchers, industry and the public in their efforts to track trends in transportation-related noise, by mode". No use restriction is stated.

"3.1. Grant of License. Under the terms of this Agreement, we grant you a worldwide, non-exclusive, non-transferable, revocable license to use the Product governed by Acceptable Usage Policy". Legitimate use includes: "Reproduce Data returned from our API in your applications, provided you include a visible attribution credit stating "Powered by Calendarific" (or substantially similar language) in your terms of service, about page, or within the user interface where the Data is displayed".

"National Energy System Operator is currently providing you the Carbon Intensity API for free." and "You can use it anywhere in the world. Your use is non-exclusive, so others can use it too." Prohibited: "Sell, lease, or sublicense the Carbon Intensity API or access to it." and "Use the Carbon Intensity API for any application that substantially replaces the core user experience of National Energy System Operator's websites, apps, or the Carbon Intensity API."

"Unless otherwise indicated, all other content offered under Creative Commons Attribution 4.0 International License." The current release (issued 2026-10-16, DOI 10.48580/dgzlf) reports license cc by.

Dataset license values in the first 200 catalog results: "Public Domain U.S. Government" (100), "Public Domain" (46), none stated (34), "Open Data Commons Attribution License" (19), "Open Data Commons Open Database License" (1).

"All complaint data we publish is freely available for anyone to use, analyze, and build on."

"We offer a fully documented public API for developers to use CheapShark pricing data on their own app or website." ... "The API is completely free, the only condition being that you use CheapShark links when sending users to deals on any of the stores we track ... This is how we pay for hosting and development!"

API page: "Our APIs and documentation are public, and we want the chess ecosystem to thrive. At the same time, we do require that you respect our IP". User Agreement: "You agree not to reproduce, duplicate, copy, sell, trade, resell or exploit for any commercial purposes, any portion of the Services". Neither document says whether the API is part of the "Services" for this clause.

Chicago: "Any user of this website providing any software application, or other secondary or derivative application using data supplied at this website shall do the following: Include the following disclaimer at the site where the software application ... can be accessed or downloaded: \"This site provides applications using data that has been modified for use from its original source, www.cityofchicago.org, the official website of the City of Chicago. ...\"" and "The City may require a user of this data to terminate any and all display, distribution or other use of any or all of the data ... for any reason".

"CityBikes is a free service. There's just one restriction: if your project is using this API you should indicate it on your app and website, linking the project page."

"Company hereby grants to Customer a worldwide, non-exclusive, non-transferable, non-sublicensable, royalty-free, revocable license, during the Term, to access and use the Service and provide Authorized Users with access and use of the Service." The service grant is "solely for Customer's internal business purposes."

"To the extent possible under law, The Cleveland Museum of Art has waived all copyright and related or neighboring rights to this dataset using Creative Commons Zero."

Not captured. The terms page renders only through JavaScript; WebFetch, curl, and Chrome all failed to load its text. Search-engine snippets say the terms require attribution to ClinicalTrials.gov, display of the processing date, disclosure of modifications, and no claim of proprietary rights, and that "some ClinicalTrials.gov data may be subject to the copyright of third parties". Read the page in a browser before relying on this.

"Cloudflare hereby grants to you a limited, revocable, non-exclusive, non-transferable, and non-sublicensable (except to Affiliates) right, to access and use the Services." Restriction: you will not "(h) process or collect personal or business credit card information on any web property that is receiving Free Services". Free Services last until "termination of the Free Service by Cloudflare in our sole discretion."

"Cloudflare hereby grants to you a limited, revocable, non-exclusive, non-transferable, and non-sublicensable (except to Affiliates) right, to access and use the Services." "Unless otherwise agreed, Cloudflare does not use any Customer Content to train generative AI tools." Third-party models: "by using such Third-Party Products, you agree to comply with all restrictions, including any acceptable use policies, in the standard terms of the model or search service provider."

"Subject to these Terms and to the payment of fees, if applicable, Cloudinary grants you a worldwide, limited, non-exclusive, revocable, non-transferable, non-sublicensable right to use the Services solely for your business purposes for websites and mobile applications, owned or operated by you, and not for further commercialization or resale."

Not captured. The terms page returned 94 characters of text to a fetch. The data.json catalog lists 3,480 datasets, all accessLevel: public, none with a license field.

Terms page would not load.

Data.gov: "In most cases, U.S. Federal data available through Data.gov is offered free and without restriction." The College Scorecard catalog entry lists the license as http://www.opendefinition.org/licenses/cc-by.

No API terms clause exists. Legal basis, 17 U.S.C. 105: "Copyright protection under this title is not available for any work of the United States Government". The Library's legal page adds: "You should determine for yourself whether or not an item is protected by copyright or in the public domain".

"This Licence is free of charge, worldwide, non-exclusive, royalty free and perpetual." "Access to Copernicus Products is given for any purpose in so far as it is lawful, whereas use may include, but is not limited to: reproduction; distribution; communication to the public; adaptation, modification and combination with other data and information; or any combination of the foregoing."

"All images are copyrighted by their respective copyright owners."

"No sign-up is required to use the REST API, and almost none of the metadata is subject to copyright, and you may use it for any purpose. Some abstracts contained in the metadata may be subject to copyright by publishers or authors."

Pricing FAQ: the free plan is "for evaluation, prototypes, and small apps." Terms: "you may not ... permitted to your end users or others acting on your behalf to, do any of the following with the data retrieved from the Currents API Service: Create permanent copies of, scrape, build databases of such data Sell, lease, lend, convey, distribute, sublicense to any third party, copy, translate, modify, create a derivative work of the data". Pricing page: "OEM distribution, resale, or republication Self-service plans: Not included by default".

"This project is licensed under the terms of the MIT license. The underlying material is released using the [Open Gaming License Version 1.0a]".

NLM: "Works produced by the U.S. government are not subject to copyright protection in the United States." and "It is your responsibility to determine and satisfy copyright or other use restrictions when using materials that are not in the public domain." Neither DailyMed nor NLM states the copyright status of manufacturer-submitted labels.

"To the extent possible under law, the European Union has waived all copyright and related or neighbouring rights to metadata of the open data portal via Creative Commons CC0 1.0 Universal Public Domain Dedication deed". For datasets: "Most of the resources published display a specific reference to the licence under which the owner has chosen to release them."

"In most cases, U.S. Federal data available through Data.gov is offered free and without restriction." and "In most cases, federal data accessed through Data.gov do not, and should not, include controls over its end use." Also: "Non-federal data available through Data.gov may have different licensing."

"With the exception of the Commonwealth Coat of Arms and where otherwise noted, material presented on Data.gov.au is provided under a Creative Commons Attribution 3.0 Australia licence." Attribute "in the manner specified in the licence (but not in any way that suggests that the publishing organisation endorses you or your use of the work)."

"You can republish any of the content available on the National Data Library as long as you meet the conditions of either the Open Government Licence or another licence it's covered by." OGL v3.0 allows commercial exploitation with attribution.

"If you'd like to use this in a customer-facing application, or if you need a custom vocabulary, or if you plan to make more than 100,000 requests per day, please describe your application (and a traffic estimate) in a message to us." Also: "If you use the API within a publicly available app, kindly acknowledge the Datamuse API within your app's documentation."

DBpedia data is available under the "Creative Commons Attribution-ShareAlike 3.0 License" and the "GNU Free Documentation License".

README: "Feel free to fork and do whatever you want with the project, it's all under the MIT license." That covers self-hosting the code commercially. The hosted service at deckofcardsapi.com states no terms for commercial traffic.

"“DeepL API Developer” refers to the API provided by DeepL free of charge." "In derogation from Section 3.1.2 sentence 1, DeepL API Developer reserves the right to perpetually store any Content or Processed Content." "If Customer uses DeepL API Developer, Customer shall not process any personal data with the API." "DeepL reserves the right to modify the functional scope of the DeepL API Developer at any time or to completely discontinue the free provision of the API."

"While the DiceBear code is MIT licensed (see Software), each artist chooses the license for their own avatar style." For CC BY 4.0 styles: "Share — copy and redistribute the material in any medium or format for any purpose, even commercially." For the artist-terms styles: "They describe their work as free for personal and commercial use."

None; the terms did not load.

"Beginning on October 7, 2024, in regions where Discord supports monetization through its Premium Apps products, all developers who offer paid features or capabilities for their Application will be required to: (i) support purchase of such features or capabilities through Discord's Premium Apps products; and, (ii) offer such features or capabilities at prices on Discord that are no higher than the prices at which they are offered through other payment options." Also: "Do not sell, license, or otherwise commercialize API Data".

"Subject to the exception below, users of this website may make free use of the information obtained directly from it subject to the following conditions: When such information is distributed or reproduced, it must appear accurately and the ECB must be cited as the source. Where the information is incorporated in documents that are sold (regardless of the medium), the natural or legal person publishing the information must inform buyers, both before they pay any subscription or fee and each time they access the information taken from this website, that the information may be obtained free of charge through this website."

Reuse policy: "U.S. government publications are in the public domain and are not subject to copyright protection." and "You may use and/or distribute any of our data, files, databases, reports, graphs, charts, and other information products." API terms: "You may not use the EIA names, or the like to imply endorsement or approval of any product, service, or entity, not-for-profit, commercial or otherwise."

"Ensembl imposes no restrictions on access to, or use of, the data provided and the software used to analyse and present it. Ensembl data generated by members of the project are available without restriction."

"The Information Provider grants you a worldwide, royalty-free, perpetual, non-exclusive licence to use the Information, including for commercial purposes, subject to the terms below."

The guidelines neither grant nor forbid commercial use. Relevant clauses: "Credit should first be given to the appropriate source—federal, state, local, and tribal air quality agencies and the EPA AirNow program—in products, publications, presentations, or any other related distribution." "Air quality data, forecast values, and advisory statements should not be altered in any way and should be disseminated as received." "If observational data are used for analyses, displayed on web pages, or used for other programs or products, the analysis results, displays, or products must indicate that these data are preliminary." "That publications, analyses, products, and/or derived information rely on these data must be made known to the relevant federal, state, local, and tribal air quality agencies and the EPA AirNow program."

dataset metadata: "license https://creativecommons.org/publicdomain/zero/1.0/" and "rights otherRestrictions, PUBLIC".

"Deploy public and private apps built on top of ArcGIS Location Services, as long as you follow the permitted uses and restrictions described in the ArcGIS Location Platform Agreement." (Location Platform help)

"All metadata from Europeana's APIs are provided as CC0, meaning you can reuse that metadata as you wish without any restrictions." Objects "can be used in accordance with the Rights Statement mentioned in the object metadata, in the europeana:rights/edm:rights field."

"Reuse of statistical data, metadata, publications, and other dissemination tools published on this website for commercial or non-commercial purposes is authorised provided the source is acknowledged." Exception: data for countries other than EU and EFTA members and official acceding and candidate countries cannot be reused commercially.

you may not "rent, lease, resell, distribute, use the Eventbrite APIs or Site Content on a stand- alone basis or for timesharing, service bureau or other commercial purposes for direct commercial or monetary gain (as opposed to indirect commercial or monetary gain associated with supporting your Application)".

Terms: "This license does not restrict Free Plan accounts differently to paid accounts, so both Free Plan and paid ExchangeRate-API accounts are suitable for either commercial or personal use." Open endpoint docs: "You're welcome to cache the data we respond with and to use it for either personal or commercial currency conversion purposes. You are, however, not allowed to re-distribute it."

No terms page found.

No terms published; access is by request only.

Not available; fbi.gov returned HTTP 403 to both the fetch tool and curl. The code repository's license reads: "As a work of the United States government, this project is in the public domain within the United States." UCR statistics are federal works, but I did not read the FBI's own reuse terms.

"As a work of the United States government, this project is in the public domain within the United States. Additionally, we waive copyright and related rights in the work worldwide through the CC0 1.0 Universal public domain dedication." (the API project license). The UCR statistics are US government works.

none; pages did not load

The website policies say only that "External sites may contain information that is copyrighted with restrictions on reuse." No statement covers reuse of FDIC's own data.

Not available. Every federalregister.gov documentation and policy URL I tried redirected to unblock.federalregister.gov (a bot-block page), and curl got the same. The JSON endpoint /api/v1/documents.json did respond. The content is US government work under 17 U.S.C. 105, but I did not read the site's own terms, so the verdict stays Unclear. Secondary source: the site describes itself as "an unofficial informational resource until the Administrative Committee of the Federal Register (ACFR) issues a regulation granting it official legal status."

"Technical GIS users can also utilize a series of dedicated GIS web services that allow the NFHL database to be incorporated into websites and GIS applications." The page sets no use restriction.

"The National Risk Index can be accessed through multiple venues, including this website, an interactive map and data exploration tool , Community Risk Profile and Comparison Reports, downloads , and geographic information system (GIS) web layers and services." No restriction is stated.

"You may use the API to develop services that search, display, analyze, retrieve, view and otherwise \"get\" information from FHFA data." and "You may not use FHFA's name, logo or trademarks to endorse any product, service, entity, or the like, regardless of whether the entity is commercial, governmental, not-for-profit, or non-profit."

"I agree that my use of any Firebase service is for purposes related to my trade, business, craft, or profession, and that my use is subject to the applicable terms below."

"Football-Data provides a free Football-Data API (with upgrade options) to the world wide development community." ... "The API Key applies to a single Application, in its web and/or mobile form and on any platform (i.e. for the web Application: the Subscription applies to a single domain name)." The terms neither grant nor forbid commercial use.

"Copyright 2024 Foursquare Labs, Inc. All rights reserved. Licensed under the Apache License, Version 2.0 (the \"License\"); you may not use this file except in compliance with the License." Apache 2.0 permits commercial use, modification, and redistribution with notice.

pricing page: "With pay-as-you-go pricing, you only pay for what you need. Test select Pro API endpoints at no charge for up to 10,000 calls." No terms page loaded.

"Is the API free for commercial use? Yes. Blended rates are Frankfurter's own calculation and free to use. Direct queries to individual provider endpoints remain subject to each provider's terms."

The terms charge no fee and do not forbid commercial use. They forbid: "Use the FRED® API for any application that replicates or attempts to replace the essential user experience of the FRED® API, or the FRED® or ALFRED® web sites." They also warn: "Data series available through the FRED® API, may be owned by third parties and subject to copyright restrictions."

"Dictionary API is—and always will be—free." No terms of service, data license, or commercial-use statement exists on the site or in the README.

"Unless otherwise specified, all data produced by the U.S EPA is by default in the public domain and is not subject to domestic copyright protection under 17 U.S.C. § 105." (EPA data license, the license Data.gov lists for this dataset)

Spec: "It is RECOMMENDED that all GBFS data sets be offered under an open data license." and, if both license_id and license_url are omitted or blank, "this indicates that the feed is provided under the Creative Commons Universal Public Domain Dedication."

From the GBIF data blog: "CC0: under which data are made available for any use without restriction CC BY: under which data are made available for any use provided that attribution is appropriately given ... CC BY-NC: under which data are made available for any use provided that attribution is appropriately given and provided the use is not for commercial purposes". The terms page itself was blocked.

"all datasets released by the GDELT Project are available for unlimited and unrestricted use for any academic, commercial, or governmental use of any kind without fee. Redistributing GDELT You may redistribute, rehost, republish, and mirror any of the GDELT datasets in any form. However, any use or redistribution of the data must include a citation to the GDELT Project and a link to this website (https://www.gdeltproject.org/)."

Terms: "The commercial use of the _Free_-package is allowed in the development and, with some limitations, in the production phase." Pricing FAQ: "You can use the Free plan for commercial websites, apps, and business projects, including in production."

"My Maps Inc. grants you a non-exclusive, non-transferable, revocable license to use the API for any legal purpose." and "You may use, export, or publish the geocoded results generated through the API for any purpose, so long as such usage conforms to all applicable license terms and laws." and "Access to the API requires a free or paid subscription".

"Customer may use the System without a charge and without providing a payment method provided that Customer's use does not exceed 2,500 daily lookups." and "Customer may store, transmit, transform, sell, and otherwise use the results provided by the Company as Customer sees fit during and beyond the Term of this Agreement, provided that such uses are permitted by the underlying Data Sources and applicable law."

"commercial usage is allowed" and "10,000 credits daily limit per application (identified by the parameter 'username'), the hourly limit is 1000 credits."

None from the terms. Docs: "If you need more than 100 API calls per hour you will need to submit an application to upgrade your API Key to production status via your dashboard. We will review your application and if you qualify, a member of our team will reach out via email to discuss pricing."

"Abuse or excessively frequent requests to GitHub via the API may result in the temporary or permanent suspension of your Account's access to the API. [...] You may not share API tokens to exceed GitHub's rate limitations. You may not use the API to download data or Content from GitHub for spamming purposes, including for the purposes of selling GitHub users' personal information, such as to recruiters, headhunters, and job boards. [...] GitHub may offer subscription-based access to our API for those Users who require high-throughput access or access that would result in resale of GitHub's Service."

"Customer’s use rights will be limited (a) to the tier level selected [...]; (b) exclusively for internal use in connection with the development of Customer’s and/or its Affiliates’ own software; and (c) to the number of Users for which Customer has paid GitLab." Also: "Free Software may be: (i) modified and/or updated, without notice, and (ii) limited in functionality".

"The Access Service on the website http(s)://www.gleif.org is provided for free." "The data available through the Access Service are provided under the CC0 licence".

"You may not charge users any fee for the use of your application, unless you have entered into a separate agreement with Google or obtained Google's written permission."

The Civic terms: "By using this API, you consent to be bound by the Google APIs Terms of Service". The Google APIs terms have no non-commercial clause; they bar reselling the API: you may not "Sublicense an API for use by a third party. Consequently, you will not create an API Client that functions substantially the same as the APIs and offer it for use by third parties." and bar content databases: you may not "Scrape, build databases, or otherwise create permanent copies of such content, or keep cached copies longer than permitted by the cache header".

"During the Term, Google will provide the Services in accordance with this Agreement, including the SLAs, and Customer may use the Services, and integrate the GCP Services and Looker (original) Services into any Customer Application that has material value independent of the Services, in accordance with this Agreement."

"Use of Google AI Studio and Gemini API is for developers building with Google AI models for professional or business purposes, not for consumer use." "When you use Unpaid Services, including, for example, Google AI Studio and the unpaid quota on Gemini API, Google uses the content you submit to the Services and any generated responses to provide, improve, and develop Google products and services and machine learning technologies". "You may use only Paid Services when making API Clients available to users in the European Economic Area, Switzerland, or the United Kingdom." "You must be 18 years of age or older to use the APIs."

"Google has replaced the USD $200 monthly recurring credit with a free monthly usage threshold for each Core Services SKU." (March 2025 changes) and from the terms: "Customer will not use the Google Maps Core Services with or near a non-Google Map in a Customer Application." and "Customer will not cache Google Maps Content except as expressly permitted under the Maps Service Specific Terms."

"Google grants to Customer a non-exclusive, non-transferable, non-sublicensable, license to use the Services in Customer Application(s)." Restrictions: "Customer will not cache Google Maps Content except as expressly permitted under the Maps Service Specific Terms." and "Customer will not use the Google Maps Core Services with or near a non-Google Map in a Customer Application. For example, Customer will not (i) display or use Places content on a non-Google Map".

None available; the terms page renders only its date. From the docs: "embed in into your own web application, e.g. an QR code generator. Our page goQR.me is also using this API."

"Copyright protection under this title is not available for any work of the United States Government" (17 U.S.C. 105, quoted on the policies page). The page warns that government publications may include copyrighted third-party content, and that licensed images on GovInfo are not in the public domain.

"Can I used Gravatar for commercial applications? Yes, Gravatar can be used in commercial applications under both the Free and Pro plans, provided the usage guidelines are followed." The free plan is offered "For startups, Fortune 500s, open source projects, and everyone in between."

"Groq grants you a non-exclusive, non-transferable, and limited right to access and use the Cloud Services in accordance with, and during the Term of, this Agreement, including the right to use Groq's APIs to integrate the Cloud Services and AI Model Services into your Customer Application and to make the Cloud Services and AI Model Services available to End Users through your Customer Applications." "Groq is not permitted to use Inputs or Outputs for training or fine-tuning any AI Model Services or other models, unless explicitly granted permission or instructed by Customer."

Project Gutenberg License 1.C: "we do not claim a right to prevent you from copying, distributing, performing, displaying or creating derivative works based on the work as long as all references to Project Gutenberg are removed." The license summary adds: "Redistribution is subject to the trademark license, especially commercial redistribution." The trademark license sets a royalty of 20% "of the gross profits you derive from the use of Project Gutenberg-tm works".

YC Terms of Use: "Commercial Use : Unless otherwise expressly authorized herein or in the Site, you agree not to display, distribute, license, perform, publish, reproduce, duplicate, copy, create derivative works from, modify, sell, resell, exploit, transfer or upload for any commercial purposes, any portion of the Site, use of the Site, or access to the Site." The API repo's MIT licence covers the documentation; neither it nor the API docs expressly authorize commercial use of the data.

"In order to help maximise adoption, there is no licencing or attribution requirements on the Pwned Passwords API, although it is welcomed if you would like to include it." For the breach and paste APIs: "you're welcome to use the public API to build other services, but you must identify Have I Been Pwned as the source of the data."

"we grant you a limited, nonexclusive, nontransferable, nonassignable, revocable license to use the API solely to access the Services. We may modify the API and/or cease support of old versions or releases of the API at any time." The terms describe charging "Integrators for use of our hCaptcha Service in order to reduce fraud, abuse, and spam on their websites, mobile apps".

Not available; the pricing and terms pages did not render as text. Pricing page meta description: "Sign up for free and pay-as-you-grow."

no terms page exists to quote. Pricing page: "We offer a free option for new partners."

"All services, which utilize or access the API, should display the following notice prominently within the application: \"This product uses the HUD User Data API but is not endorsed or certified by HUD User.\" ... You may not use the HUD User name, or the like to imply endorsement of any product, service, or entity, not-for-profit, commercial or otherwise." The terms set no commercial-use ban; the endorsement clause names commercial products as covered users.

"The IGDB.com API is free for non-commercial usage under the terms of the Twitch Developer Service Agreement." ... "I want to use the API for a commercial project, is it allowed? Yes, we offer commercial partnerships for users looking to integrate the API in monetized products. From our side, as part of the partnership, we ask for user facing attribution to IGDB.com" ... "What is the price of the API? The API is free for both non-commercial and commercial projects."

"Subject to these Terms and your timely payment of applicable fees, ImageKit grants you a worldwide, limited, non‑exclusive, revocable, and non‑transferable license to use the Service. Except as expressly permitted in these Terms, you may not use the Service for any other purpose." Free plan users contract with ImageKit Inc.: "For standard paid or free plan users, your Contracting Entity is ImageKit Inc."

The data section grants: "Users may download, extract, copy, create derivative works, publish, distribute, and use Data obtained from IMF Sites subject to these conditions" and anticipates resale: "If IMF Data is sold by Users as a standalone product, sellers must inform purchasers that the Data is available free of charge from the IMF." The same section ends: "For any potential commercial reuse of IMF Data, email copyright@imf.org to request permission."

Not available. The GODL page and policies page returned HTTP 403 to WebFetch and an Akamai error ("An error occurred while processing your request") to curl; api.data.gov.in did not connect (curl exit code 7). I did not read the licence text.

None; the terms did not load.

IPinfo Lite is released under the "Creative Commons Attribution-ShareAlike 4.0 International License" and you "can freely use and incorporate the data into commercial and non-commercial applications."

Promo content must be "placed only on pages that promote the content on which the Promo Content is based" and "proximate to a 'Download on iTunes' or 'Download on App Store' badge (as approved by Apple) that acts as a link directly to pages within iTunes where consumers can purchase the promoted content". It may not be "used for independent entertainment value apart from its promotional purpose".

"You agree to limit requests to those reasonably necessary for your application or use case. ... Where practical, applications should cache and reuse results". The policy says nothing about commercial use or data license.

No formal terms. Homepage: "Free for everyone, and it stays that way. No signup, no API key." README: "You can find it running here and are free to use it in your developments".

No terms. Footer: "The software is provided "as is" and "as and when available", without warranty of any kind".

No terms of service exist. The mission statement says: "the entire database is accessible to everyone, for free." Nothing addresses commercial use or attribution.

"All content is available under the Open Government Licence v3.0 except where otherwise stated." OGL v3.0 lets you "exploit the Information commercially and non-commercially".

lemmy.world ToS applies to "https://lemmy.world , it's API's and sub-domain services" and says: "Lemmy.world is a free service, funded by donations and run by volunteers ... it is not intended to be used as a marketing channel for extensive commercial advertising or product promotion." It does not address commercial apps that read the API. "Bots shall not be used for any kind of advertising."

"The Library of Congress believes that the newspapers in Chronicling America are in the public domain or have no known copyright restrictions. Newspapers published in the United States more than 95 years ago are in the public domain in their entirety. Any newspapers in Chronicling America that were published less than 95 years ago are also believed to be in the public domain, but may contain some copyrighted third party materials."

"Transmission or reproduction of protected items beyond what is allowed by fair use or other exemptions requires written permission from the copyright holder." The same page states: "Materials displayed on our websites are intended for reference use only."

"You can use our services for your own personal or commercial use, such as in your own applications, projects, research, or products."

Pricing page: "You can use our free plan in commercial projects if you spread the love by adding a prominent link back to us on your website or app in this format: <a href='https://locationiq.com'>Search by LocationIQ.com</a>". ToS: "A trial account of the API is currently provided for free, but LocationIQ reserves the right to charge for the API (or additional features or functionality) in the future."

Unsplash License: you may "download, copy, modify, distribute, perform, and use images from Unsplash for free, including for commercial purposes, without permission." Not permitted: "Images cannot be sold without significant modification" and "Compiling images from Unsplash to replicate a similar or competing service."

"1.4. You agree to use the Services for your trade, business, craft, or profession. You acknowledge that the Services are strictly for commercial use and that you are not authorized to use the Services for personal, family, or household purposes."

"3.1 Generally. You may use the Services for commercial and professional purposes only and may not use the Services in any situation where failure or fault of the Services or the Customer Configuration could lead to death or serious bodily injury of any person or physical or environmental damage."

"Mapbox accounts are free to create, and all customers with Pay-as-you-go billing receive a monthly free tier of services." (Invoices and billing) and "If your Licensed Application is related to business intelligence or analytics, sales performance management, cloud database management systems, or real estate, you must purchase a separate commercial license." (ToS). Vehicle apps also need a separate license.

mastodon.social terms (effective 2026-08-31) have no clause on API or commercial use. The user content licence runs only to the operator: "you automatically grant us a non-exclusive, royalty-free licence solely to operate and maintain the Service".

KB: users may "use data from GeoLite databases and web services for what we call 'Internal Restricted Business Purposes'"; apps for outside users and public display are allowed with attribution; "If you would like to sell data from the GeoLite databases or web services, or applications that include them, and you do not want to include an attribution, you will need a GeoLite Commercial License."

"Use of MBTA data is governed by the MassDOT Developers License Agreement" (MBTA V3 API page). The license PDF could not be loaded. Secondary sources say MassDOT opened its data in September 2009 at no cost and encouraged developers to sell apps or carry ads (opensource.com, 2010; TRB report Open Data: Challenges and Opportunities for Transit Agencies, 2015, whose text did not render). This check could not confirm it verbatim from the license.

"Works produced by the federal government are not copyrighted under U.S. law." Copyrighted exceptions include "Any content from the A.D.A.M. Medical Encyclopedia" and ASHP drug monographs; you may not "ingest and/or brand the copyrighted content found on MedlinePlus in an EHR, patient portal, or other health IT system" without a vendor license.

License page: "all data and products are licensed under the Norwegian Licence for Open Government Data (NLOD) 2.0 and Creative Commons 4.0 BY International licences." CC BY 4.0: "Adapt — remix, transform, and build upon the material for any purpose, even commercially." The terms of service don't mention commercial use.

FAQ: the data is licensed under a "perpetual, worldwide, non-exclusive, non-transferable licence to download, use, copy, publish, distribute, transmit, adapt and exploit the Met Office Weather DataHub Products for use in your application," subject to the terms and conditions. The full terms were not readable without an account.

Terms: "Meteostat does not charge users for the data itself. All weather and climate data provided by Meteostat can be accessed without any cost for the user." License: CC BY 4.0, "for any purpose, even commercially."

"To the extent possible under law, The Metropolitan Museum of Art has waived all copyright and related or neighboring rights to this dataset using the Creative Commons Zero license." and "These select datasets are now available for use in any media without permission or fee".

"Permission is granted to temporarily use microlink.io for personal, commercial, or non-commercial usage. This is the grant of a license, not a transfer of title, and under this license you may not: Make an unfair use of the service. Attempt to decompile or reverse engineer any software contained on Microlink."

"Translator doesn't persist customer data submitted for translation" and "Text translation processes customer data at REST and doesn't store customer data." The Microsoft Product Terms were not fetched; the F0 tier is a standard Azure pricing tier with no non-commercial restriction stated on the pricing or limits pages.

the provider's help article and terms pages that describe the Experiment plan would not load or did not contain the plan's terms. The docs page says only that free mode has "usage and rate limits apply". Search summaries of Mistral's help center describe the plan as "for evaluation and prototyping" and say requests "may be used to train Mistral's models"; not verified from the source.

Earthdata: data "provided from a NASA-led mission are licensed as Creative Commons Zero (CC0)" unless marked otherwise, and "NASA material may not be used to suggest or imply endorsement by NASA or by any NASA employee of a commercial product, service, or activity."

"If the NASA material is to be used for commercial purposes, including advertisements, it must not explicitly or implicitly convey NASA's endorsement of commercial goods or services."

"NASA content ... generally are not subject to copyright in the United States." and "If the NASA material is to be used for commercial purposes, including advertisements, it must not explicitly or implicitly convey NASA's endorsement of commercial goods or services." For APOD: "Some of the images are copyrighted and to use these pictures publicly or commercially one must write to the owners for permission."

"Application developers can incorporate archival data and metadata into their applications, websites, or datasets." Required notice: "This product uses the National Archives Catalog API but is not endorsed or certified by the National Archives and Records Administration."

"Copyright law does not protect 'any work of the U.S. Government'". For commercial publication, "the copyright notice must include a reference to the original U.S. Government work".

"All of the information presented via the API is intended to be open data, free to use for any purpose."

"Unless stated otherwise, all information on the U.S. Department of Education's IES website at http://ies.ed.gov is in the public domain and may be reproduced, published, linked to, or otherwise used without IES' permission." NCES is part of IES, and its data are works of the US government.

the terms page did not load. It is a JavaScript single-page app that rendered no text to WebFetch, curl, or a reader service. Secondary sources (UVA library guide, Berkeley D-Lab) describe the APIs as non-commercial only, which would make this a rejection, but that is not verified from the terms.

repository licence: "Attribution 4.0 International" (CC-BY-4.0). FTN charting: "This data is released under the CC-BY-SA 4.0 Creative Commons license and attribution must be made to FTN Data via nflverse".

Data.gov metadata: access level "public", rights "public". Search-indexed copies of the same record list the license as "us-pd" (US public domain). The NHTSA website-policies page returned HTTP 403, so no verbatim reuse clause from NHTSA itself was read.

"No, NHTSA is a government agency and the services provided on the API are free for use by the public" (FAQ, answering whether there is a cost). No clause restricts commercial use.

"These data and software code ("Data") are provided by the National Laboratory of the Rockies ("NLR"), which is operated by the Alliance for Energy Innovation, LLC ("Alliance"), for the U.S. Department of Energy ("DOE"), and may be used for any purpose whatsoever."

"Environmental data and information produced by NOAA or any Federal agency are available fully and openly to data users unless explicitly exempt from release by Federal law, regulation or policy. These data are in the public domain in the United States."

"The information on government servers are in the public domain, unless specifically annotated otherwise, and may be used freely by the public."

Not captured. The API page renders by JavaScript and returned only its heading; the bulk-file page (download.cms.gov/nppes/NPI_Files.html) showed a maintenance notice.

"You may use the Service without creating an account or subscribing to a paid plan. Free usage is subject to rate limits and other restrictions as described in our documentation."

Terms: "This agreement authorizes you to download and host the data on a non-MTA server (maintained by you or a third party)" and "You will access and review MTA's requirements for when you need a license from MTA in order to distribute your app." Developer page: "If an MTA-approved mobile application is provided to the public free of charge, the MTA requires a license but will not charge a license fee for the use of our intellectual property. Commercial and ad-sponsored applications may be charged a license fee."

Terms page would not load (HTTP 403 to WebFetch, curl, and a browser user agent). Search summaries say content published from 2024-07-01 is CC BY 4.0 by default; not verified on the page.

"Company grants Licensee a limited, worldwide, royalty-free, term-limited, non-transferrable, and non-exclusive license to use the SDK within its Applications and websites [...] in order to send, optimize and manage push notifications to users of its Properties". On free accounts: "The Company may terminate your subscription to the Free Services due to your inactivity or for exceeding storage and compute limitations".

"All content is available under the Open Government Licence v3.0, except where otherwise stated". OGL v3.0 lets you "exploit the Information commercially and non-commercially".

About page: "Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0)" for OCM contributor data. License announcement (2022-04-01): the move from CC-BY-SA 4.0 to CC-BY 4.0 "simplifies the use of the data by commercial organizations who are sensitive to complex licensing clauses."

The licenses "authorize the use and reproduction of the content for all purposes, including commercial use, under certain conditions." Database: Open Database License (ODbL). Images: CC BY-SA.

"The Information Provider grants you a worldwide, royalty-free, perpetual, non-exclusive licence to use the Information, including for commercial purposes, subject to the terms below." and "Copy, modify, publish, translate, adapt, distribute or otherwise use the Information in any medium, mode or format for any lawful purpose."

"The Internet Archive does not assert any new copyright or other proprietary rights over any of the material in the Open Library database." The API page adds that the APIs "are **not** intended to serve as a bulk data backend or high-traffic commercial infrastructure."

"We make no copyright claim over any of the data we collect & publish." and "No attribution is required for using data obtained via Open States. Of course, attribution is always appreciated but no affiliation or endorsement may be implied on your derivative product."

"All data provided by the API is available under the Creative Commons Attribution-ShareAlike 4.0 International License."

"the data is a public good, released under a CC0 public-domain license with no "personal use only" carve-out and no permission to ask."

"Users leveraging our hosted API agree to do so in a manner that complements rather than replicates our primary services." and "utilizing our official, hosted API implementation to develop products or services that substantially duplicate or directly compete with OpenAQ's core offerings is prohibited." Higher rates require "the payment terms and API License and Services Agreement required by OpenAQ."

"Unless otherwise noted, the content, data, documentation, code, and related materials on openFDA is public domain and made available with a Creative Commons CC0 1.0 Universal dedication. You can copy, modify, distribute, and perform the work, even for commercial purposes, all without asking permission."

FEC: "the Act prohibits the sale or use of any information about those donors, including their names and addresses, for the purpose of soliciting contributions or for commercial purposes." Exception: "the use of individual contributor information in newspapers, magazines, books or similar communications, as long as the principal purpose of the communication is not to solicit contributions or conduct commercial activity." Committee, candidate, and aggregate data carry no such limit.

"By accessing OpenFEMA datasets, you agree that the data will be used solely for statistical research or as a reporting record." and "Data accessed through FEMA's API does not include controls over its end use." Users must state: "This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. ..."

"Using our public instance is completely free: there are no limits on the number of map views or requests." FAQ, on commercial usage: "Yes."

"you may not...access the Site or Service for purposes of reselling API access to Models or otherwise developing a competing service." "Some Models may store or train on your Inputs for improving their own large language models."

Not available; the terms page did not load.

"This program is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version."

"Openverse reserves the right to charge fees for commercial uses of Openverse and/or for heavy usage". Users must "respect and comply with the terms and conditions applicable to the content and metadata accessible through Openverse, including by providing proper attribution to CC-licensed works."

FAQ: "Can I use OpenWeather's APIs commercially? Yes, you can." and "For the plans between Free and Professional, the attribution requirement is obligatory."

"No heavy uses (an absolute maximum of 1 request per second)." and "Applications and services whose primary function is related to geocoding must run their own service. This includes but is not limited to package/vehicle tracking applications and API resellers."

"OpenStreetMap (OSM) data is free for everyone to use. Our tile servers are not: they are funded by donations and sponsorship, and capacity is limited." and "Commercial services, or those that seek donations, should be especially aware that access may be withdrawn at any point."

places sources: "Data from Meta . Available under CDLA Permissive 2.0 ." (same for Microsoft, PinMeTo, BrightQuery, and others), "Data from Foursquare . ... Available under Apache 2.0 .", "Data from AllThePlaces . Available under CC0 1.0 ." CDLA Permissive 2.0: "A Data Recipient may use, modify, and share the Data made available by Data Provider(s) under this agreement if that Data Recipient follows the terms of this agreement." and "This agreement does not impose any restriction or obligations with respect to the use, modification, or sharing of Results."

Content "is available free of charge, and you are welcome to use Pexels content for anything you'd like, as long as it is within our Title." Restriction: "You may not copy or replicate core functionality of Pexels (including making Pexels content available as a wallpaper app)."

"You are welcome to use the API for your project as long as the number of requests stay in a reasonable limit. Extensive usage will be throttled or completely banned. We do not give guarantees for availability and reserve the right to implement changes without notice."

"The only additional term I have is that users do not attempt to circumvent the call limit of the API (i.e. by making multiple accounts)." and "The service is provided without warranty or guarantee, and should not be used for life or property critical applications." The terms set no commercial-use restriction; they also don't grant commercial use in words.

"You cannot sell or distribute Content (either in digital or physical form) on a Standalone basis." API docs: "If you make use of the API, show your users where the images and videos are from, whenever search results are displayed. That's the one thing we kindly request in return for free API usage."

Homepage: "The core, categorized index will always be available for free, for any use." Terms section 5: "Unless expressly permitted by the content owner or by applicable law, you will not ... Scrape, build databases, or otherwise create permanent copies of such content, or keep cached copies longer than permitted by the cache header".

"PokéAPI is free and open to use." ... "Locally cache resources whenever you request them." ... "Since the move to static hosting in November 2018, rate limiting has been removed entirely, but we still encourage you to limit the frequency of requests to limit our hosting costs."

Required notices include "Contains Ordnance Survey data © Crown copyright and database right 2025." and "Contains Royal Mail data © Royal Mail copyright and database right 2025." The licences page says Northern Ireland postcode data requires a commercial licence from NI Land & Property Services for paid uses.

NCBI: those "reproducing, redistributing, or making commercial use of this information are expected to adhere to the terms and conditions asserted by the copyright holder." The NCBI policy names PubChem among resources that contain copyrighted material from external sources.

"NLM does not claim the copyright on the abstracts in PubMed; however, journal publishers or authors may." and those "reproducing, redistributing, or making commercial use of this information are expected to adhere to the terms and conditions asserted by the copyright holder."

"You agree not to reproduce, duplicate, copy, sell, resell or exploit any portion of the Service, use of the Service, or access to the Service without the express written permission by Pushover."

the terms section says: "Free for commercial use for startups and hobby projects with not more than 100,000 monthly active users or 500,000 page views per month. If your project is larger than that, email us ... for commercial terms. No data redistribution." The plan table on the same page says the free plan is "Non-commercial projects only" and lists "Commercial use" as a feature of the $149 per month Business plan.

"Subject to all terms and conditions of this Agreement, you may, on a non-exclusive, non-transferable and revocable basis: (i) send Calls and receive Responses through the API through use of the API Key, in each case solely as prescribed by the API Documentation". Also: "You are encouraged to provide a link to recreation.gov or otherwise identify the data source, ridb.recreation.gov, when incorporating the data into your own system."

The docs page has no commercial clause for GET. It requires POST key holders to submit only comments gathered lawfully from real persons, not under "fictitious or misappropriated identities or otherwise in violation of federal law". The site's user notice returned HTTP 403, so I could not read the reuse terms.

"We grant you a revocable, non-exclusive, non-transferable, limited right to use the RentCast API and use and/or store the API Data ... (iv) to sublicense, disclose, display, resell and distribute the API Data to third parties". The terms carry no plan-specific limit for the free Developer plan.

"The Free Tier provides limited access to the Service without requiring payment. Free Tier accounts are subject to usage limits and feature restrictions as described on our pricing page. [...] At any time and without notice, Plus Five Five, Inc. reserves the right to (i) modify the features, limits, or availability of the Free Tier, (ii) cancel or discontinue the Free Tier, or (iii) convert Free Tier accounts to paid Subscriptions if usage exceeds Free Tier limits."

"much of the information and data on the Rijksmuseum's collection website and through our open data services can be freely used, including for commercial purposes, without needing to request permission."

"RxNav and the RxNorm API provide non-proprietary content from RxNorm, developed by the National Library of Medicine." Required notice: "This product uses publicly available data from the U.S. National Library of Medicine (NLM), National Institutes of Health, Department of Health and Human Services; NLM is not responsible for the product and does not endorse or recommend this or any other product."

"Except for data elements identified above as D&B Open Data, under no circumstances are you authorized to use any other D&B data for commercial, resale or marketing purposes". D&B Open Data may not be used "in bulk (i.e., in amounts sufficient for use as an original source or as a substitute for the product and/or service being licensed hereunder)". "Automated data gathering, web scraping tools are prohibited".

"Scryfall provides our card data and image database free of charge for the primary purpose of creating additional Magic software ... You may not "paywall" access to Scryfall data. You may not require anyone to make payments, take surveys, agree to subscriptions ... in exchange for access to Scryfall data. If you have an account system, end-users should be able to access card data anonymously or with free accounts." ... "You may not simply repackage, republish, or proxy Scryfall data."

"Commercial Use The API can be used by both free and commercial apps."

"Information presented on sec.gov is considered public information and may be copied or further distributed by users of the web site without the SEC's permission." The access page adds: "Anyone can access and download this information for free".

"Licensee's use of S2 Data accessed via the API are separately governed by the licenses that accompany such S2 Data, such as CC BY-NC or ODC-BY". The agreement also forbids you to "repackage, sell, rent, lease, lend, distribute, or sublicense the API".

"Yes, you may use Smithsonian Open Access assets designated as CC0 for commercial purposes without any attribution, permission, or fee paid to the Smithsonian." The press release states CC0 "permits a greater variety of uses, both commercial and non-commercial."

NYC: "Open Data belongs to all New Yorkers. There are no restrictions on the use of Open Data." San Francisco: "Data is made available under the Public Domain Dedication and License v1.0". Chicago: "Any user of this website providing any software application, or other secondary or derivative application using data supplied at this website shall ... Include the following disclaimer", and "The City may require a user of this data to terminate any and all display, distribution or other use of any or all of the data provided at this website for any reason".

No terms page exists; the site shows only "Copyright © 2026 Spaceflight News API & The Space Devs". The repository has no license (GitHub reports None).

"You may use the data provided by the spoonacular API as part of your website, application, or other project, but you cannot use spoonacular data to create a site or application meant to provide the same experience as spoonacular."

Public Network Terms: "Any other downloading, copying, or storing of any public Network Content (other than Subscriber Content or content made available via the Stack Overflow API) for other than personal, noncommercial use is expressly prohibited". The API carve-out excludes API content from the noncommercial restriction; the API terms add: "All Applications must ensure they visually indicate that the Stack Exchange Network is the source of the content provided through the API Services."