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Discover Free Public APIs for Your Next Project

API Bouncer is a curated directory of 900+ free public APIs across 50+ categories. Whether you're a developer prototyping a new app, a student learning to code, or a hobbyist building something fun, we help you find the right API fast — with auth type, CORS support, and health status surfaced up front so you can pick wisely.

A public API (Application Programming Interface) is a free service that lets your code request data from another website — weather forecasts, stock prices, game stats, AI models, and much more. Most require no payment and many need no sign-up at all. Use the search page to filter by category and authentication type, browse the bouncing icons below, or jump into our beginner-friendly guides if you've never called an API before.

Popular: Weather Finance Games AI Entertainment Music

APIs last health-checked: Nov 12, 2026. Every listing is re-checked daily. Reliability report → · See what changed →

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Browse APIs by Category

Explore our full directory of free public APIs organized by category. Click any category to see all available APIs, or click an API name to visit it directly.

Development 271 APIs

Finance 120 APIs

  • Aletheia — Insider trading data, earnings call analysis, financial statements, and more
  • Alpaca — Realtime and historical market data on all US equities and ETFs
  • AlphaAI — AI-enriched financial & insider-trading news, scored for relevance
  • Banco do Brasil — All Banco do Brasil financial transaction APIs
  • Bank Data API — Instant IBAN and SWIFT number validation across the globe
  • View all 120 Finance APIs →

Games & Comics 116 APIs

Geocoding 110 APIs

  • 17NAS — Free IP geolocation API with IPv4/IPv6 detection, ASN and country info, no auth required
  • Actinia Grass GIS — Actinia is an open source REST API for geographical data that uses GRASS GIS
  • Airtel IP — IP Geolocation API. Collecting data from multiple sources
  • Apiip — Get location information by IP address
  • ApogeoAPI — Bundled API for countries, states, cities, IP geolocation, and live exchange rates
  • View all 110 Geocoding APIs →

Government 110 APIs

Cryptocurrency 107 APIs

Transportation 101 APIs

  • ADS-B Exchange — Access real-time and historical data of any and all airborne aircraft
  • AIS Hub — Real-time data of any marine and inland vessel equipped with AIS tracking system
  • AIS Trail — Live and historical AIS ship positions, vessel search, port calls and events worldwide
  • AZ511 — Access traffic data from the ADOT API
  • AirportMiles — Airport codes, distances, routes and passenger numbers as static JSON files
  • View all 101 Transportation APIs →

Open Data 90 APIs

  • 10ML Fragrance Index — Perfume knowledge: notes, accords, families, similar scents, houses, guides. By 10ML
  • 18F — Unofficial US Federal Government API Development
  • 221 — Senegal reference data: public holidays, mobile operators, banks, communes, legal forms
  • 49 Gallery Historical Data — Normalized historical records and 25 daily-updated reference series
  • API Indonesia — Indonesian public data: regions down to 83,000+ villages with postal codes, schools, hospitals, minimum wages, DJKI trademarks. Paid per request
  • View all 90 Open Data APIs →

Documents & Productivity 81 APIs

Sports & Fitness 80 APIs

Social 76 APIs

  • 4chan — Simple image-based bulletin board dedicated to a variety of topics
  • API Direct — Real-time social media data from X, LinkedIn, Reddit, YouTube, Instagram, TikTok, Facebook and news
  • Adeli — Unified API to publish to Instagram, TikTok, X, YouTube, and Facebook
  • Ayrshare — Social media APIs to post, get analytics, and manage multiple users social media accounts
  • Blogger — The Blogger APIs allows client applications to view and update Blogger content
  • View all 76 Social APIs →

Business 71 APIs

Video 69 APIs

Security 64 APIs

Email 58 APIs

  • Academic Email API — This API allows you to verify whether an email belongs to a recognized educational institution
  • Atomic Mail — Email for AI agents: programmatic inbox creation and send/receive over JMAP
  • Autentify Verify — Brazilian email verification: deliverable, undeliverable, risky or unknown, with the reason
  • B2B Email & Domain Scorer — Email verification: MX, disposable/free/role detection, typo fix and a keep/fix/drop action
  • Best Temp Mail — Disposable inboxes for automated email testing, with OTP extraction
  • View all 58 Email APIs →

Jobs 56 APIs

  • AI Dev Jobs — AI/ML engineering job aggregator with REST, RSS, and MCP endpoints
  • AI Trainer Work — Open AI training jobs (RLHF, data annotation, expert evaluation) from 20+ platforms, with pay
  • ATS Jobs — Open jobs from a company's Greenhouse, Lever, Ashby or SmartRecruiters board in one schema
  • Adzuna — Job board aggregator
  • Allowly Hiring Evidence — Deterministic hiring policy decisions and signed evidence records
  • View all 56 Jobs APIs →

Science & Math 56 APIs

  • Astroletra — Moon phase and sign, aspects, retrogrades and next lunation by time zone
  • Botlero — Sourced, quoted specs for humanoid robots
  • CORE — Access the world's Open Access research papers
  • Chempirical — Chemical compounds with physical data, reactions and substructure search
  • CodeCogs — Render LaTeX equations in PNG, GIF, SVG, EMF, PDF, JSON, or download formats with styling options
  • View all 56 Science & Math APIs →

Health 49 APIs

  • AgingResearch — Every new aging research paper from PubMed, bioRxiv, medRxiv, arXiv and Europe PMC, judged on evidence, with trials, grants and extracted claims
  • Atmospore Pollen forecasts — The Atmospore API provides real-time and forecast pollen data for locations worldwide. Data is updated daily and include forecasts up to 7 days into the future
  • CDC Open Data — Hundreds of US Centers for Disease Control datasets (disease surveillance, vaccination, mortality) queryable as JSON through the Socrata API.
  • CMS.gov — Access to the data from the CMS - medicare.gov
  • COVID-19 Tracker Canada — Details on Covid-19 cases across Canada
  • View all 49 Health APIs →

Weather 49 APIs

Machine Learning 47 APIs

Shopping 45 APIs

  • ARC — Open data on whether AI shopping agents can reach checkout at specific online stores
  • Barcode Lookup — Product name, brand, ingredients, Nutri-Score and nutrition for 4.3M EAN, UPC and GTIN barcodes
  • Best Buy — Products, Buying Options, Categories, Recommendations, Stores and Commerce
  • BirkinBagStock — Independent Hermès resale index: inventory, market prices, auction calendar and results
  • BuyWhere — Real-time product catalog API for AI agents across merchants in 7 countries (SG, MY, TH, VN, PH, ID, US)
  • View all 45 Shopping APIs →

Photography 40 APIs

Currency Exchange 39 APIs

Art & Design 36 APIs

Music 36 APIs

Environment 35 APIs

Books 32 APIs

  • Amanah Sunnah — Semantic search across Quran, Hadith, Tafsir & 18K+ Rijal narrators
  • Bayan — Arabic Islamic encyclopedia: hadith with grades and takhrij, Quran with tafsir, narrators
  • Bhagavad Gita — Open Source Shrimad Bhagavad Gita API including 21+ authors translation in Sanskrit/English/Hindi
  • Bhagavad Gita telugu — Bhagavad Gita API in telugu and odia languages
  • Bible-api — Free Bible API with multiple languages
  • View all 32 Books APIs →

AI 32 APIs

  • AI/ML — Access 100+ curated AI Models over 1 API
  • API Route — OpenAI-compatible multi-model gateway for chat completions with API keys and usage-based billing
  • APIClaw — Flat-rate OpenAI-compatible gateway for Claude, GPT, DeepSeek, Qwen, Kimi and GLM models
  • APIModels — OpenAI-compatible API for 150+ image, video, audio and LLM models: automatic channel failover, failed calls not billed, most prices below official rates
  • AtmoRouter — OpenAI- and Anthropic-compatible LLM API: one key for chat completions, streaming and tools, billed per token from a prepaid balance
  • View all 32 AI APIs →

Food & Drink 30 APIs

News 30 APIs

  • APITube News API — Real-time and historical news from 300,000+ sources in 177 countries and 59 languages, enriched with sentiment, entities and topics, with 65+ search filters
  • Associated Press — Search for news and metadata from Associated Press
  • Chronicling America — Provides access to millions of pages of historic US newspapers from the Library of Congress
  • Currents — Latest news published in various news sources, blogs and forums
  • DataCube AI — Daily curated AI industry news, funding rounds and trends in 8 languages
  • View all 30 News APIs →

Personality 26 APIs

  • Advice Slip — Generate random advice slips
  • Astro Agents — Deterministic Western and Vedic astrology: natal charts, transits, kundli, dashas, panchang
  • AstroWay — Astrology, natal charts, Human Design, Vedic and horoscopes on the Swiss Ephemeris
  • Dev.to — Access Forem articles, users and other resources via API
  • Dictum — API to get access to the collection of the most inspiring expressions of mankind
  • View all 26 Personality APIs →

Anime 24 APIs

URL Shorteners 23 APIs

  • 1pt — A simple URL shortener
  • Appy — Create device-aware app links and read click analytics through a REST API; API key with a Business or Enterprise plan required
  • Bitly — URL shortener and link management
  • Bly.to — URL shortening service with analytics and tracking capabilities
  • Clico — URL shortener service
  • View all 23 URL Shorteners APIs →

Test Data 22 APIs

Text Analysis 22 APIs

Calendar 21 APIs

Cloud Storage & File Sharing 21 APIs

  • BasePic — Image hosting API: upload with one request, then rotate, crop, resize or filter. Free limits of 60 uploads per hour per IP, no key needed.
  • Box — File Sharing and Storage
  • Deed — Publish an HTML file or folder to a permanent public URL with one PUT, no account
  • Delta Lake — Open-source storage framework enabling Lakehouse architecture with Spark, PrestoDB, Flink, Trino, Hive, and APIs
  • Dropbox — File Sharing and Storage
  • View all 21 Cloud Storage & File Sharing APIs →

Data Validation 21 APIs

Vehicle 21 APIs

Blockchain 20 APIs

Entertainment 20 APIs

Animals 19 APIs

Anti-Malware 18 APIs

Phone 13 APIs

  • CheckThatPhone — Real-time phone validation API for US & Canada: carrier and line type from live carrier data, portability, deliverability, GeoIP and TCPA litigator scrub
  • Fax for Agents — Fax API, hosted MCP server and SDKs built so AI agents can send and receive faxes, with a free sandbox
  • MobileAPI — Smartphone, tablet, and wearable device specifications
  • Numlookup — Phone number validation and carrier lookup API with global coverage
  • Numverify — Phone number validation
  • View all 13 Phone APIs →

Dictionaries 12 APIs

Tracking 11 APIs

  • Aftership — API to update, manage and track shipment efficiently
  • Correios — Integration to provide information and prepare shipments using Correio's services
  • Pixela — API for recording and tracking habits or effort, routines
  • PostNord — Provides information about parcels in transport for Sweden and Denmark
  • PostalPinCode — API for getting Pincode details in India
  • View all 11 Tracking APIs →

Programming 10 APIs

Open Source Projects 9 APIs

Continuous Integration 7 APIs

  • Azure DevOps Health — Resource health helps you diagnose and get support when an Azure issue impacts your resources
  • Bitrise — Build tool and processes integrations to create efficient development pipelines
  • Buddy — The fastest continuous integration and continuous delivery platform
  • CircleCI — Automate the software development process using continuous integration and continuous delivery
  • Codeship — Codeship is a Continuous Integration Platform in the cloud
  • View all 7 Continuous Integration APIs →

Events 5 APIs

  • Eventbrite — Find events
  • FindLocal — Hyper-local US events: concerts, trivia, open mics, readings, storytimes
  • NeedATicket — UK and US resale ticket prices from StubHub
  • Things To Do — Local events in plain words: concerts, pop-ups, markets, classes, gallery nights
  • Ticketmaster — Search events, attractions, or venues

Patent 5 APIs

  • EPO — European patent search system api
  • PatentRef — PatentsView-compatible API for US patent grants since 1976: claims, citations, CPC, fee status
  • PatentsView — API is intended to explore and visualize trends/patterns across the US innovation landscape
  • TIPO — Taiwan patent search system api
  • USPTO — USA patent api services

Podcasts 5 APIs

  • Listen Notes Podcast API — Search podcasts and episodes, fetch metadata, get recommendations, and access audience insights. REST API with a free plan and official SDKs
  • PodcastIndex — Get details on podcasts & episodes, Podcast Search
  • Podchaser | Podcast Data API — The podcast API for discovery and insights. Access 6M+ podcasts with audience demographics, transcripts, Apple/Spotify charts. For media monitoring and intel
  • Taddy Podcasts — Get details on podcasts & episodes, Podcast & Episode Search, Webhook notifications
  • iTunes — Apple Podcasts Directory

Authentication & Authorization 4 APIs

  • GetOTP — Implement OTP flow quickly
  • ReqKey — ReqKey validates API keys, meters credits, enforces rate limits, and logs every request — from a single SDK call inside your own middleware
  • SignOps — Push notifications, login approval, passkeys, authenticator codes and email OTP on one API key
  • Warrant — APIs for authorization and access control

Why API Bouncer?

2,495+Free APIs

One of the largest directories of free public APIs, sourced and verified from the open-source community.

53+Categories

From weather and finance to AI and games — find APIs organized into easy-to-browse categories.

2,467Health Checked

We regularly ping every API so you know which ones are actually online before you start building.

20Beginner Guides

Step-by-step tutorials that teach you how to use APIs, from your first fetch() call to full projects.

API Bouncer exists to make free APIs easy to discover. Too many useful APIs sit buried in documentation pages or obscure GitHub repos. We aggregate them into one searchable, health-checked directory so developers at every level can find what they need and start building.

Read our guides · About API Bouncer · Browse all categories

Latest Guides

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A curated list of free APIs organized by portfolio project type — weather dashboards, social feeds, e-commerce mockups, data visualizations, and AI-powered tools.

Securing API Keys in Frontend Apps: A Practical Guide

Learn how to use APIs securely from frontend code. Covers API key protection, proxy servers, HTTPS, token handling, input validation, and common mistakes to avoid.

Building a Weather Dashboard: Step-by-Step Tutorial

A complete tutorial for building a weather dashboard with HTML, CSS, and JavaScript using the free Open-Meteo API. Includes geolocation, forecasts, and error handling.

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