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2,078 APIs · page 36 of 44

Spyse

Access data on all Internet assets and build powerful attack surface management applications

apiKeyHTTPSCORS ?

Security

Square

Easy way to take payments, manage refunds, and help customers checkout online

OAuthHTTPSCORS ?

Business

Squiggle

Fixtures, results and predictions for Australian Football League matches

No authHTTPSCORS

Sports & Fitness

Srp Energy

Hourly usage energy report for Srp customers

apiKeyHTTPSNo CORS

Environment

SSL Domain Health Check

SSL certificate validity, domain WHOIS status, and DNS record checks for any domain

apiKeyHTTPSCORS ?

Security

SSL Labs

Deep SSL/TLS server analysis with A+ to F grading

No authHTTPSCORS ?

Security

StackExchange

Q&A forum for developers

OAuthHTTPSCORS ?

Development

StackRates

VPS and cloud server prices from 46 providers, read daily from their own pricing pages and APIs

No authHTTPSCORS

Open Data

Stadiq

Road works, transit disruptions and air quality for Antwerp and Flanders

apiKeyHTTPSNo CORS

Transportation

staffSign

Digital employment contract API with QES/eIDAS support for HR and staffing

apiKeyHTTPSCORS

Documents & Productivity

Stanza DSCSA Verifier

Verify FDA DSCSA and EU FMD pharmaceutical serialization barcodes

apiKeyHTTPSNo CORS

Health

Stanza UDI Decoder

Decode and validate FDA GUDID and EU MDR medical device UDI barcodes

apiKeyHTTPSNo CORS

Health

Stanza VAT Validator

Validate EU and UK VAT numbers with country formats, checksums, and VIES status

apiKeyHTTPSNo CORS

Finance

Statically

A free CDN for developers

No authHTTPSCORS

Development

Statistics of the World

Economic data for 218 countries — GDP, population, inflation, and 440+ indicators from IMF and World Bank

No authHTTPSCORS

Open Data

Statlyte

Live pricing, context windows and model ids for major LLM APIs

No authHTTPSCORS

Machine Learning

StatOrigin

Industry statistics, each traced to its primary source with a verbatim quote, CC BY 4.0

No authHTTPSCORS

Open Data

Steam

Steam Web API documentation

apiKeyHTTPSNo CORS

Games & Comics

Steam

Internal Steam Web API documentation

No authHTTPSNo CORS

Games & Comics

SteamGPT

Steam profiles, SteamID conversion, VAC/game bans, FACEIT stats and friends

No authHTTPSCORS

Games & Comics

sthan.io Address Autocomplete

Real-time US address suggestions as users type

apiKeyHTTPSNo CORS

Data Validation

sthan.io Address Parser

Parse freeform US addresses into structured fields (house number, street, unit, city, state, ZIP)

apiKeyHTTPSNo CORS

Data Validation

sthan.io Address Verification

Validate and standardize US addresses, with ZIP+4 and deliverability status

apiKeyHTTPSNo CORS

Data Validation

sthan.io India PIN Code Autocomplete

Autocomplete Indian PIN codes as users type

apiKeyHTTPSNo CORS

Geocoding

sthan.io IP Geolocation

Look up the geographic location of any IPv4 or IPv6 address

apiKeyHTTPSNo CORS

Geocoding

sthan.io Reverse Geocoding

Convert latitude and longitude to the nearest US street address

apiKeyHTTPSNo CORS

Geocoding

StockData

Real-Time, Intraday & Historical Market Data, News and Sentiment API

apiKeyHTTPSCORS

Finance

StockFit

SEC filings, financial statements, earnings, ETF holdings and ownership data

apiKeyHTTPSCORS

Finance

Stoicism Quote

Quotes about Stoicism

No authHTTPSCORS ?

Personality

Storj

Decentralized Open-Source Cloud Storage

apiKeyHTTPSCORS ?

Cloud Storage & File Sharing

Storm Glass

Global marine weather from multiple sources

apiKeyHTTPSCORS

Weather

Strait of Hormuz Ship Monitor

Live AIS vessel traffic, crossings and oil flow through the Strait of Hormuz

No authHTTPSNo CORS

Transportation

Stranger Things Quotes

Returns Stranger Things quotes

No authHTTPSCORS ?

Video

Strava

Connect with athletes, activities and more

OAuthHTTPSCORS ?

Sports & Fitness

Stream

Czech internet television, films, series and online videos for free

No authHTTPSNo CORS

Video

StrikerAPI

Football from 16 leagues incl. Premier League and MLS: lineups, shot maps, xG and odds

apiKeyHTTPSCORS

Sports & Fitness

Stromberg Quotes

Returns Stromberg quotes and more

No authHTTPSCORS ?

Video

Studio Ghibli

Resources from Studio Ghibli films

No authHTTPSCORS

Anime

Stytch

User infrastructure for modern applications

apiKeyHTTPSNo CORS

Authentication & Authorization

Styvio

Realtime and historical stock data and current stock sentiment

apiKeyHTTPSCORS ?

Finance

Sudoku100

Free Sudoku puzzle generation and embedding with images, solver links and interactive games

No authHTTPSCORS ?

Games & Comics

Sugra

One API for market data, economics, commodities, climate, and global news. LLM-ready JSON

apiKeyHTTPSCORS

Finance

SukuuData

Ghana's schools, 2026 SHS placement register and CSSPS choice validation

apiKeyHTTPSCORS

Government

Sunor

AI music generation API via Suno, with pay-as-you-go credits

apiKeyHTTPSCORS ?

Music

Sunrise and Sunset

Sunset and sunrise times for a given latitude and longitude

No authHTTPSNo CORS

Science & Math

Supercrontab Mock Endpoints

Mock endpoints in 8 formats, each returning any of 14 HTTP status codes

No authHTTPSCORS

Test Data

SuperHeroes

All SuperHeroes and Villains data from all universes under a single API

apiKeyHTTPSCORS ?

Games & Comics

Supportivekoala

Autogenerate images with template

apiKeyHTTPSCORS

Development

One account · one API key