Free APIs for Developers

A curated collection of free APIs perfect for testing, learning, and building projects. Most require no authentication.

Now with MCP Server support for AI Agents!

Table of Contents

• For AI Agents
• Weather & Environment
• Finance & Cryptocurrency
• Entertainment & Media
• Data & Demographics
• Fun & Random
• Development & Testing
• Science & Education
• Location & Geography
• Food & Lifestyle
• Animals

---

For AI Agents

This collection includes an MCP Server that lets AI agents (Claude, etc.) discover and call these APIs directly.

Quick Setup (Claude Code)

# Install dependencies
cd mcp-server && pip install -e .

# Add to Claude Code
claude mcp add free-apis -- python /path/to/free-apis-collection/mcp-server/server.py

MCP Tools Available

Tool	Description
list_categories()	See all API categories
list_apis(category, auth_required)	Filter APIs by category or auth
search_apis(query)	Search by keyword
get_api(name)	Get full API details
quick_test(api_name)	Instantly test a no-auth API
call_api(url)	Call any API endpoint
get_random_api()	Discover a random API

For Vibe Coders

Just tell your AI assistant:

• "Get me a random dog image" → Uses Dog CEO API
• "What's Bitcoin worth?" → Uses CoinDesk API
• "I'm bored" → Uses Bored API
• "Tell me a joke" → Uses Joke API

See AGENTS.md for full AI agent documentation.

---

Weather & Environment

API	URL	Description
OpenWeather	https://openweathermap.org/api	Current weather, forecasts, and historical data

Finance & Cryptocurrency

API	URL	Description
CoinDesk	https://api.coindesk.com/v1/bpi/currentprice.json	Bitcoin Price Index in real-time (No Auth)
CoinGecko	https://www.coingecko.com/en/api	Cryptocurrency prices, market data, and exchanges
ExchangeRate-API	https://www.exchangerate-api.com/	Currency exchange rates

Entertainment & Media

API	URL	Description
The Movie DB	https://www.themoviedb.org/documentation/api	Movies, TV shows, and actor information
Giphy	https://developers.giphy.com	GIFs, stickers, and animated content
JokeAPI	https://jokeapi.dev	Programming, misc, dark, pun jokes
Official Joke API	https://official-joke-api.appspot.com/random_joke	Random jokes (No Auth)
Bored API	https://www.boredapi.com/api/activity	Activity suggestions when bored (No Auth)
PokeAPI	https://pokeapi.co/	Pokemon data and sprites (No Auth)
Open Trivia DB	https://opentdb.com/api_config.php	Trivia questions across categories (No Auth)
Chuck Norris API	https://api.chucknorris.io/	Chuck Norris jokes (No Auth)
Quotable	https://github.com/lukePeavey/quotable	Random quotes (No Auth)

Data & Demographics

API	URL	Description
REST Countries	https://restcountries.com	Country information, flags, currencies, languages
Data USA	https://datausa.io/api/data?drilldowns=Nation	U.S. demographic and population data (No Auth)
Agify.io	https://api.agify.io?name=michael	Estimate age from name (No Auth)
Genderize.io	https://api.genderize.io?name=luc	Predict gender from name (No Auth)
Nationalize.io	https://api.nationalize.io?name=nathaniel	Infer nationality from name (No Auth)
RandomUser	https://randomuser.me/api/	Generate fake user data (No Auth)
Universities List	http://universities.hipolabs.com/search?country=United+States	Universities by country (No Auth)
Public APIs	https://api.publicapis.org/entries	Directory of public APIs (No Auth)

Fun & Random

API	URL	Description
Cat Facts	https://cat-fact.herokuapp.com/facts	Random cat facts (No Auth)
Numbers API	http://numbersapi.com/	Facts about numbers (No Auth)
Advice Slip	https://api.adviceslip.com/	Random life advice (No Auth)
Yes No	https://yesno.wtf/api	Random yes/no answers with GIFs (No Auth)
Useless Facts	https://uselessfacts.jsph.pl/	Random useless facts (No Auth)

Development & Testing

API	URL	Description
JSONPlaceholder	https://jsonplaceholder.typicode.com	Fake REST API for testing and prototyping
GitHub REST API	https://docs.github.com/en/rest	GitHub repositories, users, and activity
HTTPBin	https://httpbin.org/	HTTP request & response testing (No Auth)
ReqRes	https://reqres.in/	Fake REST API for front-end testing (No Auth)
IPify	https://api.ipify.org?format=json	Get your public IP address (No Auth)
IPinfo	https://ipinfo.io/json	IP geolocation data

Science & Education

API	URL	Description
NASA Open API	https://api.nasa.gov	Space imagery, Mars rover photos, asteroids
SpaceX API	https://github.com/r-spacex/SpaceX-API	SpaceX launches, rockets, and capsules (No Auth)
Open Library	https://openlibrary.org/developers/api	Books and author information (No Auth)
Wikipedia API	https://www.mediawiki.org/wiki/API:Main_page	Wikipedia content and search (No Auth)
arXiv API	https://arxiv.org/help/api	Scientific papers and preprints (No Auth)
Free Dictionary	https://dictionaryapi.dev/	English word definitions (No Auth)

Location & Geography

API	URL	Description
Zippopotam	https://api.zippopotam.us/us/33162	Postal code lookup (No Auth)
IP Geolocation	https://ip-api.com/	IP-based location data (No Auth)
OpenSky Network	https://opensky-network.org/apidoc/	Live flight tracking data
Open Charge Map	https://openchargemap.org/site/develop/api	EV charging station locations (No Auth)

Food & Lifestyle

API	URL	Description
OpenFoodFacts	https://world.openfoodfacts.org/data	Food products and nutritional data
TheMealDB	https://www.themealdb.com/api.php	Recipes and meal data (No Auth)
TheCocktailDB	https://www.thecocktaildb.com/api.php	Cocktail recipes (No Auth)
Trefle	https://trefle.io	Plants database and botanical data

Animals

API	URL	Description
Dog CEO	https://dog.ceo/api/breeds/image/random	Random dog images (No Auth)
Cat API	https://thecatapi.com/	Cat images and breeds
Dog API	https://thedogapi.com/	Dog images and breed information
RandomFox	https://randomfox.ca/floof/	Random fox images (No Auth)
Shibe.online	https://shibe.online/	Random shiba inu, cat, bird images (No Auth)

---

Quick Test URLs (No Auth Required)

Try these directly in your browser:

# Random dog image
curl https://dog.ceo/api/breeds/image/random

# Your IP address
curl https://api.ipify.org?format=json

# Random joke
curl https://official-joke-api.appspot.com/random_joke

# Random activity
curl https://www.boredapi.com/api/activity

# Bitcoin price
curl https://api.coindesk.com/v1/bpi/currentprice.json

# Random user
curl https://randomuser.me/api/

---

Contributing

Found a great free API? Open a PR to add it!

Resources

• public-apis/public-apis - Massive community-curated list
• Free Public APIs - No-auth APIs collection
• Apipheny Free API List - 90+ public APIs

---

License

MIT - Feel free to use and share!