ShareYourGroupShareYourGroupFree Public APIs

Free public APIs, no key needed

Try them in your browser. Copy the code.

APIKindFree tier
Open Library booksBooks and knowledgeOpen Library's developer page asks you to cache responses, to identify your application with a User-Agent header and an email, and not to harvest HTML or make hundreds of single-book requests: use the search endpoint for batches.
Wikipedia page summaryBooks and knowledgeWikimedia publishes API reference and rate-limit pages (api.wikimedia.org).
GitHub REST APICodeUnauthenticated requests are tied to your IP address and limited to 60 requests per hour (GitHub Docs, rate limits for the REST API).
World Bank indicatorsDataThe World Bank's terms for using its datasets give permission subject to attribution to the World Bank Group (the terms page we read says the licence rights are conditioned on proper attribution): read the current terms before you republish data.
IFSC code lookup (Razorpay)IndiaThe data and code are published as an open source project on GitHub under the MIT licence (github.com/razorpay/ifsc); ifsc.razorpay.com is the address of the hosted service.
Zippopotam postal codesIndiaThe service describes itself as a free API with a JSON response, open to crowdsourcing and contribution.
Frankfurter exchange ratesMoneyThe public API needs no key, and the project is open source so you can run your own copy (Frankfurter's home page).
JSONPlaceholder fake dataPracticeDescribed on its own site as a free online REST API that you can use whenever you need some fake data.
PokeAPIPracticePokeAPI's fair use policy says to cache resources locally whenever you request them and to be friendly to other developers, and lists policies that limit abuse (for example, a restriction on non-GET methods).
Open-Meteo weatherWeather and placeThe free API is for non-commercial use, under 10,000 calls a day, 5,000 an hour and 600 a minute, with no uptime guarantee; data is under the CC BY 4.0 licence, so give credit.
Sunrise-Sunset timesWeather and placeThe documentation says the API is free to use with no sign-up or key, and that attribution is required: show a visible link to sunrise-sunset.org on the page where you show the data.

APIs for India Guides

What is here

Eleven free APIs that need no key and answer browser requests. Every page has the request in curl, Python and JavaScript, a real answer, a box to try it and a summary of the terms.

How we chose

  1. No key, no sign-up.
  2. It answered from Chrome on a page of another site (CORS).
  3. It gave the same successful answer with curl, Python and Node.js.
  4. We could read its terms.

Before you build on one

Read the terms on the API's own page, cache the answers, and have a plan for when the service is slow or gone.

Are these APIs reliable?

No promise. Free services can change or stop. The guides explain how to be polite and how to cope.

Can I use them in a commercial site?

Check each one. For example Open-Meteo's free tier is for non-commercial use only.

This is an independent directory. It is not connected with any of the services listed. Each address was called on 14 November 2026 with curl, Python, Node.js and Chrome (from a page on another site), and the answer shown is a real one. APIs change: check the service's own page before you depend on it.