Free Public APIs for Developers and Agents
Free public web APIs that developers and AI agents can call. Entries come from the open public-apis list; each link was checked automatically (HTTP status) on the date shown, which says the site responded, not that the API is good.
SoloLuck
Bitcoin solo mining pool stats, per-address miner stats and an open dataset of solo-mined blocks
Sonar
Project Sonar DNS Enumeration API
SonarQube
SonarQube REST APIs to detect bugs, code smells & security vulnerabilities
Songkick
Music Events
Songlink / Odesli
Get all the services on which a song is available
SoundCloud
With SoundCloud API you can build applications that will give more power to control your content
Spaceflight News
Spaceflight related news 🚀
SpaceTradersAPI
A playable inter-galactic space trading MMOAPI
SpaceX
Company, vehicle, launchpad and launch data
SpaceX
GraphQL, Company, Ships, launchpad and launch data
Sparepilot
Spare parts catalog, OEM cross-references & price comparison for garden power equipment
Spatial India
District-level data for India: Census, NFHS-5, NCRB, RBI and more, reconciled onto one map
Speak AI
Transcribe and analyze audio and video in 100+ languages
Spoonacular
Recipes, Food Products, and Meal Planning
Sportmonks Cricket
Live cricket score, player statistics and fantasy API
Sportmonks Football
Football score/schedule, news api, tv channels, stats, history, display standing e.g. epl, la liga
SportScore
Live scores, fixtures, standings and stats for football, basketball, cricket and tennis
Spotify
View Spotify music catalog, manage users' libraries, get recommendations and more
Spyse
Access data on all Internet assets and build powerful attack surface management applications
Square
Easy way to take payments, manage refunds, and help customers checkout online
Squiggle
Fixtures, results and predictions for Australian Football League matches
Srp Energy
Hourly usage energy report for Srp customers
SSL Domain Health Check
SSL certificate validity, domain WHOIS status, and DNS record checks for any domain
SSL Labs
Deep SSL/TLS server analysis with A+ to F grading
StackExchange
Q&A forum for developers
Stadiq
Road works, transit disruptions and air quality for Antwerp and Flanders
staffSign
Digital employment contract API with QES/eIDAS support for HR and staffing
Stanza DSCSA Verifier
Verify FDA DSCSA and EU FMD pharmaceutical serialization barcodes
Stanza UDI Decoder
Decode and validate FDA GUDID and EU MDR medical device UDI barcodes
Stanza VAT Validator
Validate EU and UK VAT numbers with country formats, checksums, and VIES status
Statically
A free CDN for developers
Statistics of the World
Economic data for 218 countries — GDP, population, inflation, and 440+ indicators from IMF and World Bank
Statlyte
Live pricing, context windows and model ids for major LLM APIs
StatOrigin
Industry statistics, each traced to its primary source with a verbatim quote, CC BY 4.0
Steam
Steam Web API documentation
Steam
Internal Steam Web API documentation
SteamGPT
Steam profiles, SteamID conversion, VAC/game bans, FACEIT stats and friends
Steem
Blockchain-based blogging and social media website
sthan.io Address Autocomplete
Real-time US address suggestions as users type
sthan.io Address Parser
Parse freeform US addresses into structured fields (house number, street, unit, city, state, ZIP)
sthan.io Address Verification
Validate and standardize US addresses, with ZIP+4 and deliverability status
sthan.io India PIN Code Autocomplete
Autocomplete Indian PIN codes as users type
sthan.io IP Geolocation
Look up the geographic location of any IPv4 or IPv6 address
sthan.io Reverse Geocoding
Convert latitude and longitude to the nearest US street address
StockData
Real-Time, Intraday & Historical Market Data, News and Sentiment API
StockFit
SEC filings, financial statements, earnings, ETF holdings and ownership data
Stoicism Quote
Quotes about Stoicism
Storj
Decentralized Open-Source Cloud Storage
Storm Glass
Global marine weather from multiple sources
Strait of Hormuz Ship Monitor
Live AIS vessel traffic, crossings and oil flow through the Strait of Hormuz
Stranger Things Quotes
Returns Stranger Things quotes
Strava
Connect with athletes, activities and more
StrikerAPI
Football from 16 leagues incl. Premier League and MLS: lineups, shot maps, xG and odds
Stromberg Quotes
Returns Stromberg quotes and more
Studio Ghibli
Resources from Studio Ghibli films
Stytch
User infrastructure for modern applications
Styvio
Realtime and historical stock data and current stock sentiment
Sudoku100
Free Sudoku puzzle generation and embedding with images, solver links and interactive games
Sugra
One API for market data, economics, commodities, climate, and global news. LLM-ready JSON
SukuuData
Ghana's schools, 2026 SHS placement register and CSSPS choice validation
Sunor
AI music generation API via Suno, with pay-as-you-go credits
Sunrise and Sunset
Sunset and sunrise times for a given latitude and longitude
Supercrontab Mock Endpoints
Mock endpoints in 8 formats, each returning any of 14 HTTP status codes
SuperHeroes
All SuperHeroes and Villains data from all universes under a single API
Suprsonic
Unified agent API: search, scrape, enrich, image gen, TTS, STT, messaging. One key, 20+ capabilities
SustainMetrics
18,000+ GHG emission factors from DEFRA, EPA, ADEME, Ember
Swanum Comps
Sold resale prices from Vinted (7 European countries) and eBay US, with median and price range
SWAPI
All the Star Wars data you've ever wanted
SWAPI
All things Star Wars
SWAPI GraphQL
Star Wars GraphQL API
SwarmMemo
Public bulletin board where AI agents and humans read, post and reply, no account or key needed
SwiftKanban
Kanban software, Visualize Work, Increase Organizations Lead Time, Throughput & Productivity
SwiftNodes
Multi-chain blockchain RPC nodes (Ethereum, Solana and 75+ networks)
Synonyms
Synonyms, thesaurus and antonyms information for any given word
Sähkön hinta nyt
Finnish and Nordic day-ahead electricity spot prices (15-minute), cheapest hours
TacoFancy
Community-driven taco database
Tallytopia
Calculators for finance, health, math, space and sports with step-by-step results
Talordata
SERP data from major search engines with a free trial
Tankerkoenig
German realtime gas/diesel prices
Tanvo
Image, video and song generation on 30 AI models (Nano Banana, Kling, Veo, Suno), with a free tier
TasteDive
Content-based recommendations for movies, music, TV shows, books, games, and podcasts
Tasty
API to query data about recipe, plan, ingredients
Tax Data
Instant VAT number and tax validation across the globe
TaxID
EU VAT number validation with company name and address lookup across all 27 member states
TCGdex
Multi languages Pokémon TCG Information
TeamSort
Create a ranked-choice poll from a text prompt and get a shareable link
Tebex
Tebex API for information about game purchases
Techmap
Job postings from 185 sources in 250 countries and territories, with an archive since 2020
Technical Analysis
Cryptocurrency prices and technical analysis
TechRole Index
Russian IT profession, vacancy publication and salary aggregates
Techy
JSON and Plaintext API for tech-savvy sounding phrases
Telegram Bot
Simplified HTTP version of the MTProto API for bots
Telegram MTProto
Read and write Telegram data
Telegraph
Create attractive blogs easily, to share
Telize
Telize offers location information from any IP address
TempMailGrab
Disposable inboxes for email testing with OTP extraction and webhooks
Temsor
Validates Turkish national ID, tax number, IBAN, phone, plate and parses addresses
TensorFeed
Real-time AI news, model pricing, service status, and agent activity feeds
Terrace Weather
Terrace open/closed verdict for restaurants, from the weather forecast
TerraScoutX
US property records by address: parcel, owner, appraised value, tax, flood zone and nearby schools