explaingit

fangzesheng/free-api

16,072Audience · developerComplexity · 1/5Setup · easy

TLDR

A monthly-updated curated catalog of free third-party APIs, weather, QR codes, train lookups, LLM wrappers, and more, with links to try each one directly from its documentation page.

Mindmap

mindmap
  root((free-api))
    Categories
      Weather
      QR codes
      Train tickets
      LLM wrappers
    How it works
      Monthly updates
      Changelog format
      Try online links
    Audience
      Developers
      Side project builders
    Access
      Documentation links
      Free registration
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Code map

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Things people build with this

USE CASE 1

Browse the catalog to quickly find a free weather, QR code, or holiday API without hosting anything yourself.

USE CASE 2

Add a small data feature such as train ticket lookup or an LLM wrapper to a side project using one of the listed free services.

USE CASE 3

Try a listed API directly from its documentation page without writing any code first.

Getting it running

Difficulty · easy Time to first run · 5min

Some listed APIs require creating an account on the provider site to get a free-tier access key.

License terms were not mentioned in the explanation.

In plain English

This project is a curated catalog of free APIs that the maintainer has gathered from around the web, framed in the README as "an API mover/courier." Rather than building APIs from scratch, the project collects services that other people host for free and lists them in one place so developers can find and try them quickly. The README notes that some listed APIs come from third parties, where you may need to register as a member on that provider's site to use their free tier. The way it works is straightforward: every month the maintainer publishes a dated entry adding one or more new interfaces, with a short description and a link to its documentation page on the free-api.com site. The full README is essentially a long, reverse-chronological changelog of these monthly additions. Many entries are marked as callable online, meaning you can try them directly from the documentation page. There is also a companion "Free API" public account that subscribers can follow to receive monthly updates and access keys. The collected interfaces cover a wide range of everyday needs: weather, train ticket lookups, hot-search rankings from various sites, QR code generation, ID verification, holiday lookups, music search, image-to-base64 conversion, ICP record lookups, and small wrappers around large language models such as DeepSeek through different providers. Someone would use this repo when they want to add a small data feature to a project but don't want to host the data or logic themselves. The repository itself is a documentation index, so the README does not state a programming language, framework, or runtime. The full README is longer than what was provided.

Copy-paste prompts

Prompt 1
I want to add QR code generation to my app for free. Which API from the free-api catalog should I use, and can you show me a sample JavaScript fetch call?
Prompt 2
Using one of the free LLM wrapper APIs listed in the free-api project, write me a Python function that sends a prompt to DeepSeek and returns the response text.
Prompt 3
I need a free weather API for a weekend project. Which entry in the free-api list has the most generous free tier and how do I call it from Node.js?
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