The Best Free Public APIs of 2026
This isn't a hand-curated list with affiliate bias. Every API here earned its spot by scoring well on three measured dimensions: 30-day uptime (weighted 60%), response time from our hourly checks (30%), and how frictionless the free tier is (10%). We track 113 APIs across 8 categories, running automated health checks every hour. The picks below are the top 3 per category — the ones that are reliable, fast, and genuinely free right now. For the full ranked list in each category, click through to the category page. See our methodology for how scores are calculated.
Cryptocurrency
- #1 Blockchain.com Data API 🟢 Online No key
Free Bitcoin blockchain data API from Blockchain.com providing prices, stats, blocks, and transaction data. No key required.
Unlimited, no key, no credit card
- #2 Coinbase Advanced Trade API (Public) 🟢 Online No key
Public endpoints of Coinbase for market data including real-time prices, order books, and candles for all listed assets.
10 calls/sec, no key for public endpoints
- #3 Coinpaprika 🟢 Online No key
Free cryptocurrency market data API with prices, volumes, market cap, and historical data for 2,000+ coins.
25,000 calls/month, no key, no credit card
Dev-tools
- #1 Free Dictionary API 🟢 Online No key
Dictionary definitions, phonetics, synonyms, and audio pronunciation for English words (plus 12 other languages). Community-run wrapper over Wiktionary data.
Unlimited (fair use), no key, no credit card
- #2 ipify 🟢 Online No key
The simplest public IP address API on the internet. One endpoint, returns your caller's public IP as text, JSON, or JSONP. Unlimited and free forever.
Unlimited, no key, no credit card
- #3 DiceBear Avatars 🟢 Online No key
Avatar generation API — 30+ styles (identicons, pixel art, illustrated characters) generated deterministically from a seed string. Same seed always returns the same avatar.
Unlimited (fair use), no key, no credit card
Finance
- #1 European Central Bank Rates 🟢 Online No key
Official ECB foreign exchange reference rates in XML format. Covers 30+ currencies with daily updates. No key required.
Unlimited, no key, no credit card
- #2 Twelve Data 🟢 Online
Financial market data API covering stocks, forex, ETFs, and mutual funds with real-time and historical data.
800 calls/day, free key, no credit card
- #3 Fixer.io 🟢 Online
Foreign exchange rate API with daily rates from ECB and 170+ currencies, widely used for financial apps.
100 calls/month, EUR base only, free key, no CC
Geocoding
- #1 ip-api.com 🟢 Online No key
Free IP geolocation API returning country, city, region, ISP, and coordinates for any IP address. No key required.
45 calls/min (HTTP only), no key, no credit card
- #2 Nominatim (OpenStreetMap) 🟢 Online No key
Free forward and reverse geocoding from OpenStreetMap data. Rate-limited.
1 req/sec, must set User-Agent, no key
- #3 BigDataCloud Reverse Geocoding 🟢 Online No key
Free reverse geocoding API converting coordinates to addresses with locality, city, country, and postcode data.
Unlimited (client-side), no key for basic endpoints
Mcp
- #1 Cloudflare Docs MCP 🟢 Online No key
Cloudflare's official docs MCP server — query Workers, D1, R2, KV, and Pages documentation with citations. No key required.
Unlimited (fair use), no key, no credit card
- #2 Microsoft Learn MCP 🟢 Online No key
Official Microsoft MCP server — search and retrieve Microsoft/Azure documentation as grounded context for AI agents. No key, no signup.
Unlimited (fair use), no key, no credit card
- #3 DeepWiki MCP 🟢 Online No key
Cognition's MCP server for asking questions about any public GitHub repository, answered from DeepWiki's AI-generated codebase wikis.
Unlimited (fair use), no key, no credit card
News
- #1 Hacker News API 🟢 Online No key
Official Firebase-based Hacker News API providing real-time access to stories, comments, jobs, and user data.
Unlimited, no key, no credit card
- #2 DEV Community API 🟢 Online No key
Official API for DEV.to providing access to articles, tags, and user profiles from the developer community platform.
30 calls/30s unauthenticated, no key for reads
- #3 Wikipedia REST API 🟢 Online No key
Official Wikipedia API for retrieving article summaries, full text, featured content, and on-this-day events.
Unlimited, no key, must set User-Agent
Public-data
- #1 PokéAPI 🟢 Online No key
Comprehensive RESTful Pokémon data API covering all 1,000+ Pokémon, moves, abilities, types, and evolution chains. A go-to for learning REST API consumption and building fan projects.
Unlimited, no key, no credit card
- #2 Rick and Morty API 🟢 Online No key
REST and GraphQL API for the Rick and Morty animated series, including all characters, locations, and episodes. Commonly used in React/GraphQL tutorials and hackathon projects.
10,000 req/day, no key, no credit card
- #3 Random User Generator 🟢 Online No key
Generates realistic random user profiles with names, addresses, photos, emails, and demographic data. Ideal for populating mockups, testing UI components, and seeding development databases.
Unlimited, no key, no credit card
Weather
- #1 NOAA National Weather Service 🟢 Online No key
Official US government weather API providing forecasts, alerts, and observations for US locations. No key required.
Unlimited (US only), no key, no credit card
- #2 Weatherstack 🟢 Online
Real-time and historical weather data API powered by worldwide weather stations with JSON and XML output.
100 calls/month, free key, no credit card
- #3 7Timer! 🟢 Online No key
Free, no-key weather forecast API focused on astronomical and civil forecasts using NOAA GFS model data.
Unlimited, no key, no credit card
Frequently Asked Questions
What makes an API the 'best' free API?
We define 'best' by three measurable factors: reliability (uptime over 30 days), speed (response time from our hourly checks), and free-tier accessibility (how much friction is between you and the first successful call). These are weighted 60/30/10 in our composite score. An API that's almost never down and responds quickly beats a feature-rich API that's slow and unreliable, even if the latter has a more impressive marketing page. All data is from our own automated checks — no self-reported uptime, no sponsored rankings.
Are these APIs all production-safe for 2026?
The ones with high composite scores and stable uptime histories are used in production by many developers. That said, 'production-safe' depends on your requirements. For a side project handling hundreds of calls/day, Open-Meteo or Frankfurter are genuinely reliable enough. For a business application handling millions of calls/month, you should evaluate each API's SLA, support options, and paid tiers as a fallback. None of the free tiers on this list come with a formal SLA — that's what paid plans are for. We link to paid alternatives on each API's detail page.
How often does this list change?
The underlying data (uptime, response times) updates every hour. The page itself is rebuilt periodically, so the composite scores and rankings reflect recent monitoring data. New APIs get added to our tracking when they launch or when the community requests them. APIs that go down permanently or move behind a paywall are moved to the Graveyard section. The list for 2026 reflects the APIs that are available and performing well right now, not a static snapshot from the beginning of the year.
Are free APIs safe to use if I don't read the terms?
Skipping the terms is a real risk. Even genuinely free APIs have usage restrictions that matter for commercial projects: Open-Meteo prohibits commercial use on the free tier; Nominatim requires attribution; some news APIs restrict you from storing or reselling the data. For personal projects and prototyping, these restrictions rarely matter. For anything shipping to real users or generating revenue, spend 10 minutes reading the terms of service — it's much cheaper than retrofitting a paid plan after you've built on a free tier that doesn't permit your use case.