Browse by category
APIs grouped by domain. Each category includes auth requirements, rate limits, and example endpoints.
Finance and crypto
Stock prices, exchange rates, crypto tickers, and historical market data. Includes CoinGecko, Alpha Vantage, and ExchangeRate-API.
News
Headlines, article search, and media monitoring. NewsAPI, GNews, and The Guardian Open Platform for structured news data.
Weather
Current conditions, forecasts, and historical weather. Open-Meteo stands out: no API key, no rate limit, 80 years of historical data.
Sports
Live scores, team rosters, historical stats, and schedules across major leagues. ESPN, NBA, NFL, and soccer APIs.
ML and text
Sentiment analysis, language detection, summarization, and translation. Hugging Face Inference API, LibreTranslate, and more.
Entertainment
Movies, TV, music, books, and games. TMDB, RAWG, Open Library, and Spotify metadata for media-related projects.
API evaluation at a glance
Quick comparison of popular free APIs by authentication, CORS support, and rate limits.
| API | Auth | CORS | Limits |
|---|---|---|---|
| Open-Meteo | None | Yes | No hard limit (fair use) |
| CoinGecko | None (free tier) | Yes | 10-30 req/min |
| NewsAPI | API key | No (server only) | 100 req/day free |
| TMDB | API key | Yes | ~40 req/10s |
| Hugging Face | Token (free) | Yes | Rate-limited per model |
| Open Library | None | Yes | 100 req/5min (search) |
Weekend project ideas
Combine two or three APIs from the catalog to build something useful in a single session.
Local weather dashboard
Pull 7-day forecasts from Open-Meteo and air quality from OpenAQ. No keys needed. Display in a single-page app with auto-refresh.
News sentiment tracker
Fetch headlines from NewsAPI, run them through Hugging Face sentiment analysis, and chart the mood of the news cycle over time.
Crypto price alert bot
Poll CoinGecko for price changes, trigger alerts when thresholds are hit. Add historical sparklines with free charting data.
Feed APIs to AI agents
The catalog works well as context for AI coding assistants. Point your agent at a category and let it pick the right API for your task.
Example prompt
# Give Claude the catalog as context, then ask for implementation
"Using the free APIs catalog, build me a Python script that
fetches the current weather for Newark, NJ and the top 5
headlines about New Jersey, then formats both into a single
Slack message."
# Claude picks Open-Meteo (no key) + GNews (free tier)
# and writes the integration code for you.Install the skill
1 Clone the repository
git clone https://github.com/jamditis/claude-skills-journalism.git2 Copy skill to Claude skills directory
cp -r free-apis-catalog ~/.claude/skills/3 Start building
Ask Claude to find an API for your use case, compare options, or build an integration using free endpoints from the catalog.
Based on @qwerty's free APIs catalog (Mar 2026)
Adapted by Joe Amditis at the Center for Cooperative Media
Part of Claude Skills for Journalism • MIT License