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.
Travel Risk
Government travel advisories, disaster and conflict alerts and country risk scores
Travel Risk Aviation
Flight status, airports, airlines, airline safety and in-flight Wi-Fi data
Travis CI
Sync your GitHub projects with Travis CI to test your code in minutes
Tredict
Get and set activities, health data and more
Trello
Boards, lists and cards to help you organize and prioritize your projects
TrendsMCP
Live keyword trend data from Google, TikTok, YouTube, Amazon and Reddit
Tripadvisor
Rating content for a hotel, restaurant, attraction or destination
Tronald Dump
The dumbest things Donald Trump has ever said
Trove
Search through the National Library of Australia collection of 1000s of digitised newspapers
TrustyData
French address checks, INSEE company search and routing on official open data
TubeToTranscript
Extract clean YouTube video transcripts via REST API
Tumblr
Read and write Tumblr Data
TVDB
Television data
TweetAPI
Public Twitter data for posts, profiles, followers, search, lists and communities
Twelve Data
Stock market data (real-time & historical)
Twinbay
Spin up stateful API twins, read request logs and grade agent runs
Twitch
Game Streaming API
Read and write Twitter data
TwitterAPIs
Twitter / X data API: search, profiles, timelines, followers, DMs, write actions
TWZRD Agent Intel
Solana on-chain agent trust scoring via MCP; 4 free tools to score, resolve and verify AI agent wallets
Tyk
Api and service management platform
Uber
Uber ride requests and price estimation
uchecker
Bulk email verification with full SMTP server responses
Udemy(instructor)
API for instructors on Udemy
Uebermaps
Discover and share maps with friends
UGC VZ
Directory of DACH user-generated-content creators with topics, cities, rates and contact requests
UGCdrop
Search real UGC video clips (reactions, hooks, b-roll) by emotion, niche, age and setting
UK Bank Holidays
Bank holidays in England and Wales, Scotland and Northern Ireland
UK Carbon Intensity
The Official Carbon Intensity API for Great Britain developed by National Grid
UK Companies House
UK Companies House Data from the UK government
UK Legislation Changes
Point-in-time amendment history for UK law
UK Police
UK Police data
Umeå Open Data
Open data of the city Umeå in northen Sweden
Unblock Master IP
IP geolocation plus datacenter and VPN detection for any IPv4 or IPv6 address
Undertow
Public market-depth and sized exit estimates, not executable quotes
Universalis
Final Fantasy XIV market board data
Universities List
University names, countries and domains
University of Oslo
Courses, lecture videos, detailed information for courses etc. for the University of Oslo (Norway)
uNoGS
Unofficial Netflix Online Global Search, Search all netflix regions in one place
Unpaywall
Open-access status and legal full-text links for scholarly articles
Unplugg
Forecasting API for timeseries data
Unsplash
Photography
Untappd
Social beer sharing
UPC database
More than 1.5 million barcode numbers from all around the world
UpRes
AI image upscaling to 8K with 18 models (Real-ESRGAN, SeedVR2, AuraSR)
UPS
Shipment and Address information
Upwork
Freelance job board and management system
Urantia Papers
Full-text + semantic search across the Urantia Papers, with audio narration, entities, translations
Urban Observatory
The largest set of publicly available real time urban data in the UK
Urgences Québec
Hourly emergency room occupancy, stretcher counts and wait times for every hospital in Quebec, Canada
URLhaus
Bulk queries and Download Malware Samples
URLhaus
Database of malicious URLs used for malware distribution
URLpipe
Turn a URL into Markdown, screenshots, metadata or Lighthouse audits, rendered in real Chrome
URLScan.io
Scan and Analyse URLs
US Autocomplete
Enter address data quickly with real-time address suggestions
US Extract
Extract postal addresses from any text including emails
US Mortgage Calculator
Mortgage payment, amortization, affordability and 50-state property tax data
US Recalls
Check US recalls from 9 agencies by UPC, model, NDC, lot or VIN; 4 read-only tools
US Street Address
Validate and append data for any US postal address
US Weather
US National Weather Service
US ZipCode
Validate and append data for any US ZipCode
USAJOBS
US government job board
USAspending.gov
US federal spending data
Userstack
Secure User-Agent String Lookup JSON API
USGS Earthquake Hazards Program
Earthquakes data real-time
USGS Water Services
Water quality and level info for rivers and lakes
USPTO
USA patent api services
Utah AGRC
Utah Web API for geocoding Utah addresses
Utilorax
203 JSON endpoints: hashing, encoding, unit conversion, text, dates and file conversion
UUID Generator
Generate UUIDs
Valorant (non-official)
An extensive API containing data of most Valorant in-game items, assets and more
VALR
Cryptocurrency Exchange based in South Africa
VAT Validation
Validate VAT numbers and calculate VAT rates
VATlayer
VAT number validation
Vector Express v2.0
Free vector file converting API
VedIntel™ AstroAPI
Vedic astrology computation — birth charts, dashas, panchang, AI narratives
Velib metropolis, Paris, France
Velib Open Data API
Veridion
US congressional stock-trade disclosures and the President's OGE reports, linked to each filing
Verified Handles
Official social media handles and identifiers of 155,000+ notable people and organisations
VerifNow
Validates email, phone, IBAN, EU VAT against VIES, and Canadian, Spanish and US national IDs
Veriphone
Phone number validation & carrier lookup
VeriRoute Intel
CNAM caller ID, carrier/LRN lookup and spam scoring for North American phone numbers
Verome
Music API for searching, streaming and exploring music data from YouTube Music, YouTube, and Last.fm
Vett
Screen names & companies against OFAC, PEP, watchlists & recalls
ViaCep
Brazil RESTful zip codes API
Vibeworker
Upwork job listings with client data and AI fit scores, plus webhooks and RSS
Video to Markdown
Turn a YouTube URL into a markdown thumbnail image link
VidWords
YouTube transcripts and subtitles as TXT, SRT, VTT or DOCX, plus AI video analysis
Village
Person and company enrichment plus warm introduction paths through your network
Vimeo
Vimeo Developer API
VirusTotal
VirusTotal File/URL Analysis
Visual Crossing
Global historical and weather forecast data
vk
Read and write vk data
Voidly
Internet censorship measurements, incidents, and ISP-level blocking data across 126 countries
Vornamencheck
Gender probability for a first name, optionally per country; documentation in German
VotePredictor
US election forecasts, congressional voting records and forecaster accuracy ratings
Voxell Forge
OpenAI-compatible text embeddings API, free-forever model with no credit card required
VoxOdds
Polymarket and Kalshi odds, all-in executable quotes, EV checks and audited forecast scores
VPNDetection
Check whether an IPv4 or IPv6 address belongs to VPN infrastructure, no key needed
VulDB
VulDB API allows to initiate queries for one or more items along with transactional bots