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.
Launch Library 2
Spaceflight launches and events database
Laya Decision Gateway
Sub-35ms AI gateway for prompt injection defense, support ticket triage & content moderation
Lazada
Retrieve product ratings and seller performance metrics
Lecto Translation
Translation API with free tier and reasonable prices
Legal Sandbox Georgia
Find verified legal specialists in Georgia from natural-language queries
Level
Job listings rated by AI level, from Little AI to Builds AI; REST, RSS and MCP
Lexigram
NLP that extracts mentions of clinical concepts from text, gives access to clinical ontology
Libraries.io
Metadata, dependencies and release history for open-source packages across 30+ managers
LibreTranslate
Translation tool with 17 available languages
License-API
Unofficial REST API for choosealicense.com
Lichess
Access to all data of users, games, puzzles and etc on Lichess
Lightdrift
Search 1.85M openly licensed images by text or image, with license and attribution per result
Line
Line Login, Share on Line, Social Plugins and more
The foundation of all digital integrations with LinkedIn
LinkPreview
Get JSON formatted summary with title, description and preview image for any requested URL
LiquiLens
Public-record bank and lender failure-risk evidence
Litport Free Proxy
Live-tested HTTP, SOCKS4, and SOCKS5 proxies with latency, uptime, and geolocation
Live SEC Form 4 Insider Trades
Latest SEC Form 4 insider trading filings from EDGAR, by ticker or market-wide
LiveOrDown
Live up/down status of 240+ online services, checked every minute from 3 regions
LiveTrafficCam
Live US state DOT traffic cameras with verified live status and measured uptime
Lix.li
URL shortener with analytics, QR codes, UTM tags and custom domains
Lob.com
US Address Verification
LocalGov.jp
Japan grants and subsidies (central J-Grants + 1,916 municipalities)
localscreenshot
Screenshot or PDF rendering of any public page, from 227 countries
LocationIQ
Provides forward/reverse geocoding and batch geocoding
Locio
Australian address autocomplete, validation and geocoding from the G-NAF national register
LoginRadius
Managed User Authentication Service
Logs.to
Generate logs
Longdo Map
Interactive map with detailed places and information portal in Thailand
Longevity World Cup
Public biological age competition data with biomarkers and rankings
Lordicon
Icons with predone Animations
Lorem Picsum
Images from Unsplash
loremfile
Hotlinkable CC0 sample files in 78 formats, each with a SHA-256 in a JSON manifest
LottoLens PH
Fixed Philippine PCSO historical results and normal draw schedules
Lowy Asia Power Index
Get measure resources and influence to rank the relative power of states in Asia
Luchtmeetnet
Predicted and actual air quality components for The Netherlands (RIVM)
Lucifer Quotes
Returns Lucifer quotes
Lumify
Real-time sports intelligence: scores, odds, betting splits & AI bet analysis across 8 sports
Lyrics.ovh
Simple API to retrieve the lyrics of a song
macadress
MAC address and OUI vendor lookup synced from IEEE, with randomized-MAC detection
Machinetutors
AI Solutions: Video/Image Classification & Tagging, NSFW, Icon/Image/Audio Search, NLP
Macrostrat
Geologic maps, rock columns and stratigraphy data
MadeOnSol
Real-time Solana & Robinhood Chain KOL trades, deployer reputation, and DEX activity
mail.gw
10 Minute Mail
mail.tm
Temporary Email Service
mailboxlayer
Email address validation
MailboxValidator
Validate email address to improve deliverability
MailCheck.ai
Prevent users to sign up with temporary email addresses
Mailchimp
Send marketing campaigns and transactional mails
Mailfornet
Disposable inboxes for end-to-end signup tests, with long-polling and HMAC-signed webhooks
mailjet
Marketing email can be sent and mail templates made in MJML or HTML can be sent using API
MailRambo
Verify email deliverability with a strict yes/no, disposable and catch-all detection
Mailsac
Disposable Email
MailSenpai DNS Check
Check a domain's SPF, DKIM, DMARC and MX records and get what to fix, with the values to publish
Mailtrap
Email API and SMTP for sending transactional and bulk emails, with email testing sandbox for safe development
MalDatabase
Provide malware datasets and threat intelligence feeds
MalShare
Malware Archive / file sourcing
Malwagon
Detonates files and URLs in instrumented VMs and returns behaviour, IOCs and ATT&CK
MalwareBazaar
Collect and share malware samples
MangaDex
Manga Database and Community
Mangapi
Translate manga pages from one language to another
MangaUpdates
Manga database: series, releases, groups and reading lists
Mapbox
Create/customize beautiful digital maps
Mapbox
Maps, directions, geocoding
MapQuest
To access tools and resources to map the world
markerapi
Trademark Search
MarketAux
Live stock market news with tagged tickers + sentiment and stats JSON API
Marketplace Fee Data
Seller fee schedules for 21 e-commerce marketplaces and payment processors as JSON
Marketstack
Real-Time, Intraday & Historical Market Data API
Marvel
Marvel Comics
Maskbreak
Detect VPNs, proxies, Tor, bots and antidetect browsers at signup, login and checkout
Master Setter
Pokémon TCG cards, sets and printings in 14 languages, searchable by name in any language
matchwire.win
Matched prediction-market games across Kalshi, Polymarket US/Intl and Predict.fun
Materials Platform for Data Science
Curated experimental data for materials science
MathJS
Evaluate math expressions via GET or POST as JSON
Mattermost
An open source platform for developer collaboration
MCU Countdown
A Countdown to the next MCU Film
MediaCraft AI
Chinese content compliance review (17 platforms), EN↔CN translation, and SEO optimization. Pay-per-call via x402 (Solana USDC).
Mediastack
Free, Simple REST API for Live News & Blog Articles
Medium
Community of readers and writers offering unique perspectives on ideas
MedlinePlus Genetics
Genetic conditions, genes, chromosomes and mtDNA data
Meetup.com
Data about Meetups from Meetup.com
Meirra
SEO monitoring, email verification, lead generation, and marketing analytics
Meme Maker
REST API for create your own meme
Memesio
Meme creation API with templates, editable captions and hosted share links
Mempool
Bitcoin API Service focusing on the transaction fee
MeowFacts
Get random cat facts
Mercadolibre
Manage sales, ads, products, services and Shops
MercadoPago
Mercado Pago API reference - all the information you need to develop your integrations
Mercedes-Benz
Telematics data, remotely access vehicle functions, car configurator, locate service dealers
Merriam-Webster
Dictionary and Thesaurus Data
Messari
Provides API endpoints for thousands of crypto assets
MessengerX.io
A FREE API for developers to build and monetize personalized ML based chat apps
Met Office DataHub
UK weather forecasts and climate data
Metabase
An open source Business Intelligence server to share data and analytics inside your company
Meteorologisk Institutt
Weather and climate data
Metropolitan Museum of Art
Met Museum of Art
Mexc
Cryptocurrency info, place order
Mexico
Mexico RESTful zip codes API
Micro-SaaS AI Suite
8 serverless AI APIs for sentiment analysis, copy generation, email verification, & OCR