Discover Free Public APIs

BARTarrow_forward

Public transportation data for the San Francisco Bay Area Rapid Transit system.

Great Circle Mapperarrow_forward

Calculate flight distances and map routes between global airports.

BikeTheTarrow_forward

Find bicycle parking locations at MBTA transit stations. (biketet.com)

fingerprint

Identities & Utilities

RandomUser.mearrow_forward

One of the best mock-data APIs. Generates completely realistic user profiles for testing UIs. (randomuser.me/api/)

Bored APIarrow_forward

Gives you a random activity to do when you have nothing to do.

DuckDuckGo Instant Answerarrow_forward

Programmatic access to DuckDuckGo's quick answers and Wikipedia summaries.

Text Similarity Calculatorarrow_forward

A simple endpoint that takes two strings and mathematically calculates how similar they are.

fitness_center

Sports & Fitness

Ergast F1 APIarrow_forward

Historical data, lap times, and standings for Formula 1 motor racing.

Hockey-LIVE.sk Dataarrow_forward

Open JSON feeds for live hockey scores and data.

CityBikesarrow_forward

Find bike-sharing station locations and active bike counts for cities globally.

NHL APIarrow_forward

The completely open, undocumented API the NHL uses for its own website . (statsapi.web.nhl.com/api/v1/)

library_books

Dictionaries & Content

4chan APIarrow_forward

Read-only JSON API for reading 4chan imageboards and threads.

Abbreviation APIarrow_forward

Simple endpoint to get the meanings of standard abbreviations.

Anime News Networkarrow_forward

Anime and manga industry news encyclopedia.

Wordnikarrow_forward

Generous open access to dictionary definitions, audio pronunciations, and word usage.

Wikipedia APIarrow_forward

Fetch article summaries, metadata, and search results instantly.

policy

Open Government & Civic Data

Colorado Data Enginearrow_forward

Formatted and geolocated public data from the State of Colorado.

Data USAarrow_forward

Massive repository of US public data covering population, economy, and health.

Prague Opendataarrow_forward

City of Prague open civic data . (opendata.praha.eu)

Represent by Open Northarrow_forward

Find Canadian Government Representatives by postal code.

Open Government Australiaarrow_forward

The official open data portal for the Australian government.

build

Tech & Developer Utilities

Agify.ioarrow_forward

Pass it a name, and it will predict the person's age based on global census data.

Nationalize.ioarrow_forward

Pass it a name, and it will predict the person's nationality.

Genderize.ioarrow_forward

Pass it a first name, and it will predict their gender.

fonaApiarrow_forward

Get detailed mobile device descriptions and hardware specs.

ReSmush.itarrow_forward

Send it an image URL, and it will compress and optimize the image for web use.

Teleportarrow_forward

Quality of life data, cost of living, and salaries for cities around the world.

Whois Lookuparrow_forward

Retrieve WHOIS domain registration data for public URL research.

attach_money

Finance, Crypto & Markets

Binance Public APIarrow_forward

Fetch current market prices and trading pairs without an account.

CoinDesk BPIarrow_forward

Real-time Bitcoin Price Index in USD, GBP, and EUR.

Blockchain.com APIarrow_forward

Open data on Bitcoin payments, wallets, and raw transaction blocks.

MercadoBitcoinarrow_forward

Public API for Brazilian cryptocurrency market information.

casino

Random Generators & Humor

Bored APIarrow_forward

Gives you suggestions for random activities when you have nothing to do.

Love Calculatorarrow_forward

Enter two names and get a randomized "love compatibility" percentage.

Meme Generatorarrow_forward

Generates random popular meme templates.

SimSimi Conversationarrow_forward

Open endpoints for early-internet style chatbot responses.

Vadivelu Status Codesarrow_forward

HTTP Codes paired with images of the famous Indian comedian Vadivelu.

terminal

Developer Microservices & Utilities

QR Code Generatorarrow_forward

Send a URL and get an SVG, Base64, or ASCII QR code back instantly.

UUID Generatorarrow_forward

Instantly generate random UUID strings for database keys or testing.

Regex Testerarrow_forward

Pass a regex pattern and a text string, and get the exact matches returned in JSON.

Markdown to HTMLarrow_forward

Post raw markdown strings and receive properly formatted HTML tags back.

Color Converterarrow_forward

Programmatically convert between HEX, RGB, and HSL color codes.

Base64 Converterarrow_forward

Encode or decode Base64 strings on the fly.

JSON Formatter & Validatorarrow_forward

Send messy JSON and have the API validate, format, or minify it.

Timestamp Converterarrow_forward

Parse and format UNIX timestamps into human-readable strings, or calculate time differences.

Text Transformerarrow_forward

Change casing or get word counts mathematically. (emptychair.dev/api/text-transform)

Lorem Ipsum Generatorarrow_forward

Generate dummy placeholder text by the word, sentence, or paragraph.

rocket_launch

Sci-Fi & Fantasy Universes

Ice and Fire APIarrow_forward

Quantified and structured data from the Game of Thrones universe . (anapioficeandfire.com/api/)

STAPIarrow_forward

The ultimate open Star Trek database covering spacecraft, species, episodes, and tech.

Final Space APIarrow_forward

Data covering characters, episodes, and quotes from the animated show.

satellite_alt

Space & Infrastructure

NOAA / Weather.govarrow_forward

This is a hidden gem. The official US Government weather API funded by tax dollars. Gives you full radar, forecasts, and current conditions completely free.

DigitalOcean Status APIarrow_forward

Real-time access to the uptime, downtime, and operational status of DO's cloud infrastructure. Great for building status dashboards.

TheSpaceDevsarrow_forward

Real-time data about rocket launches, crewed spaceflights, and space agencies . (ll.thespacedevs.com/2.2.0/)

APIs.guruarrow_forward

The "Wikipedia for Web APIs." This is a literal open directory of OpenAPI specifications.

token

Advanced Finance & On-Chain Crypto

DEX Screenerarrow_forward

Real-time blockchain screener, liquidity pool data, and decentralized exchange volume.

GeckoTerminalarrow_forward

Deep on-chain crypto and DeFi data straight from blockchain networks.

CoinMaparrow_forward

Find the exact physical GPS coordinates of cryptocurrency ATMs globally.

Kraken Public Market Dataarrow_forward

Fetch recent crypto trades, order books, and asset pairs straight from the Kraken exchange without logging in.

NBP Web APIarrow_forward

The National Bank of Poland's open API for historic and current currency exchange rates and gold prices.

school

Knowledge & Language

Quote Gardenarrow_forward

A fast, heavily categorized database of over 7,500 quotes . (quote-garden.onrender.com/api/v3/quotes)

Ceska Televizearrow_forward

Program data and scheduling from Czech television networks.

The Rosary APIarrow_forward

Structured JSON data for Rosary prayers and mysteries.

psychology

Artificial Intelligence & LLMs

Google Gemini APIarrow_forward

Google gives you a massive free tier for their AI models through Google AI Studio. Perfect for building chatbots or text-analysis tools.

Groqarrow_forward

Lightning-fast AI inference. They offer a highly generous free tier for developers to run models like Llama 3 and Mixtral.

Hugging Face APIarrow_forward

Access thousands of open-source AI models for NLP and image tasks. You just need to create an account to get a free read token.

map

Maps & Geocoding

Mapboxarrow_forward

The absolute best alternative to Google Maps. Your free API key gives you 50,000 free map loads a month, which is enough to run a moderately successful production app for free.

Positionstackarrow_forward

Forward and reverse geocoding . The free key gives you 25,000 requests per month.

TomTom APIarrow_forward

Excellent routing, traffic, and map display data with a generous free tier for registered developers.

thunderstorm

Weather & Climate

WeatherAPIarrow_forward

One of the most robust weather services available. Signing up gets you a key that allows for 1,000,000 free calls per month for real-time and forecasted weather.

OpenWeatherMaparrow_forward

Their free tier is legendary in the dev community. A quick signup gives you a key for 1,000 API calls per day for global weather data.

newspaper

Media & News

TMDB (The Movie Database)arrow_forward

If you are building a movie app, this is the gold standard. Create an account, register your app, and they hand you a key with practically unlimited access to their massive movie/TV database.

NewsAPIarrow_forward

Search worldwide news articles and breaking headlines. It’s completely free for development environments once you register for a key.

Unsplash APIarrow_forward

Access millions of high-resolution, royalty-free images. Registering for a key gives you a generous limit of 50 requests per hour to pull professional photography into your UI.

credit_card

Finance & Infrastructure

The king of payments. While you only pay when you process real money, creating an account gives you free "Test Mode" API keys. You can build and test an entire enterprise-grade checkout flow without spending a dime.

Alpha Vantagearrow_forward

Real-time stock, ETF, and forex data. You need to claim a free API key on their site, which gives you 25 API calls per day for deep financial data.