Tutorials

Copy-paste-ready code in Python, JavaScript, and curl for the most reliable free public APIs. Each tutorial covers auth setup, request patterns, common gotchas, and links to the live status page.

• Using the Open-Meteo API in Python, JavaScript, and curl

  Open-Meteo requires no API key and gives you 10,000 calls/day. This tutorial shows you how to fetch a forecast, parse the response, and handle the WMO weather codes.

  Open-Meteo status ↗  ·  curl, JavaScript, Python  ·  ~5 minutes
• CoinGecko API: JavaScript and Python with Rate Limit Handling

  The CoinGecko Demo plan gives you 10–30 calls/minute with no key. Here's how to fetch prices, batch multiple coins in one call, and handle 429 rate limit errors gracefully.

  CoinGecko status ↗  ·  JavaScript, Python  ·  ~8 minutes
• Geocoding with Nominatim: Why You Must Set a User-Agent

  The missing User-Agent header breaks more Nominatim integrations than anything else. This tutorial covers the correct setup, rate limiting, batching strategies, and when to fall back to OpenCage.

  Nominatim (OpenStreetMap) status ↗  ·  curl, Python, JavaScript  ·  ~6 minutes
• Frankfurter API for Currency Conversion in Python

  Frankfurter serves European Central Bank exchange rates with no key, no rate limit, and a clean REST interface. This tutorial covers fetching latest rates, converting amounts, and querying historical rates.

  Frankfurter status ↗  ·  Python, curl  ·  ~5 minutes
• Querying NewsData.io in JavaScript with Pagination

  NewsData.io's free tier gives 200 calls/day. This tutorial covers fetching top news, filtering by country and category, handling the nextPage token for pagination, and staying within the daily cap.

  NewsData.io status ↗  ·  JavaScript, curl  ·  ~7 minutes