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.
Nutritionix
Worlds largest verified nutrition database
Nuvinty
UK luxury list prices, price history, increases and partner pre-owned asking prices
OBIS
Global marine species occurrence and distribution data
ObjectCut
Image Background removal
OCR.Space
OCR text extraction from images and PDFs with a free tier
Octopart
Electronic part data for manufacturing, design, and sourcing
Odds-API
Real-time sports betting odds from 365+ bookmakers across 34 sports via REST and WebSocket
OddsBench
Independent monthly latency benchmark of sports odds APIs, with free JSON and CSV data
OddsRadarWire
Live and prematch Betradar odds with raw no-vig probabilities, REST and SSE
Oikolab
70+ years of global, hourly historical and forecast weather data from NOAA and ECMWF
Oliver's mTOR Atlas
Curated mTOR research: studies by evidence type, pathway claims, open questions
OLX Poland
Integrate with local sites by posting, managing adverts and communicating with OLX users
On va où ?
Bike, scooter, motorcycle, wheelchair and walking routes across Europe, with safety indicators
One Map, Singapore
Singapore Land Authority REST API services for Singapore addresses
OneDrive
File Sharing and Storage
OneFindMe
Search AliExpress in any language: price, rating and orders for the delivery country
OneSignal
Self-serve customer engagement solution for Push Notifications, Email, SMS & In-App
onomeo
OpenAI-compatible, about 30 free LLMs, 30 calls per 5 hours, optional pay-as-you-go, public beta
OnWater
Determine if a lat/lon is on water or land
Onyx Bazaar
Free public leaderboard of x402 paid HTTP services indexed from Coinbase CDP discovery API
Open Brewery DB
Breweries, Cideries and Craft Beer Bottle Shops
Open Charge Map
Global public registry of electric vehicle charging locations
Open Collective
Get Open Collective data
Open Data Minneapolis
Spatial (GIS) and non-spatial city data for Minneapolis
Open Disease
API for Current cases and more stuff about COVID-19 and Influenza
Open Ephemeris
Sub-arcsecond planetary positions, natal charts, transits, and Human Design from NASA JPL DE440
Open Food Facts
Food Products Database
Open Government, ACT
Australian Capital Territory Open Data
Open Government, Argentina
Argentina Government Open Data
Open Government, Australia
Australian Government Open Data
Open Government, Austria
Austria Government Open Data
Open Government, Belgium
Belgium Government Open Data
Open Government, Colombia
Colombia Government Open Data
Open Government, Cyprus
Cyprus Government Open Data
Open Government, Czech Republic
Czech Republic Government Open Data
Open Government, Denmark
Denmark Government Open Data
Open Government, Estonia
Estonia Government Open Data
Open Government, Finland
Finland Government Open Data
Open Government, France
French Government Open Data
Open Government, Germany
Germany Government Open Data
Open Government, Greece
Greece Government Open Data
Open Government, Indonesia
Indonesian Government Open Data
Open Government, Ireland
Ireland Government Open Data
Open Government, Italy
Italy Government Open Data
Open Government, Luxembourg
Luxembourgish Government Open Data
Open Government, Mexico
Mexico Government Open Data
Open Government, Netherlands
Netherlands Government Open Data
Open Government, New South Wales
New South Wales Government Open Data
Open Government, New Zealand
New Zealand Government Open Data
Open Government, Peru
Peru Government Open Data
Open Government, Poland
Poland Government Open Data
Open Government, Portugal
Portugal Government Open Data
Open Government, Queensland Government
Queensland Government Open Data
Open Government, Singapore
Singapore Government Open Data
Open Government, Slovakia
Slovakia Government Open Data
Open Government, Slovenia
Slovenia Government Open Data
Open Government, South Australian Government
South Australian Government Open Data
Open Government, Spain
Spain Government Open Data
Open Government, Sweden
Sweden Government Open Data
Open Government, Switzerland
Switzerland Government Open Data
Open Government, Taiwan
Taiwan Government Open Data
Open Government, Thailand
Thailand Government Open Data
Open Government, UK
UK Government Open Data
Open Government, USA
United States Government Open Data
Open Government, Victoria State Government
Victoria State Government Open Data
Open Government, West Australia
West Australia Open Data
Open Library
Books, book covers and related data
Open Page Rank
API for calculating and comparing metrics of different websites using Page Rank algorithm
Open Scholarships
Free, openly-licensed directory of US scholarships and student aid from official sources
Open Science Framework
Repository and archive for study designs, research materials, data, manuscripts, etc
Open Skills
Job titles, skills and related jobs data
Open Targets
Gene-disease-drug target associations
Open Topo Data
Elevation and ocean depth for a latitude and longitude
Open Trivia
Trivia Questions
Open VSX
Search and access VS Code extensions from the Open VSX registry
Open-Meteo
Free weather API for non-commercial use
Open-Meteo Ensemble
Weather ensemble forecasts from multiple models
openAFRICA
Large datasets repository of African open data
OpenAlex
Open catalog of scholarly works, authors, institutions, sources, and concepts
OpenAPIHub
The All-in-one API Platform
OpenAQ
Open air quality data
OpenCage
Forward and reverse geocoding using open data
OpenF1
Real-time and historical Formula 1 data including laps, car telemetry and positions
openFDA
Public FDA data about drugs, devices and foods
OpenFIGI
Equity, index, futures, options symbology from Bloomberg LP
OpenFoot API
Football fixtures, results, standings, lineups, live events and shot-level xG across 75 competitions
OpenGraphr
Really simple API to retrieve Open Graph data from an URL
OpenLigaDB
Crowd sourced sports league results
OpenMercantil
Spanish company public data and BORME event timelines
Openpath
US job listings and local businesses for agents, with apply links and owner inboxes
OpenQR
Generate QR codes and manage dynamic (editable) QR codes with scan analytics
OpenRegistry
Real-time queries to 80+ national company registries (UK, FR, DE, IT, ES, KR and more)
OpenRouter
Unified API for 300+ LLMs from OpenAI, Anthropic, Meta, Mistral and more, with a free tier
openrouteservice.org
Directions, POIs, isochrones, geocoding (+reverse), elevation, and more
OpenSanctions
Data on international sanctions, crime and politically exposed persons
openSenseMap
Data from Personal Weather Stations called senseBoxes
OpenSky Network
Free real-time ADS-B aviation data
OpenStates
US state legislature bills and lawmakers
OpenSubtitles
Search and download subtitles for movies and TV shows
OpenSwissData
Swiss customs tariff (TARES), FINMA register and warnings, NOGA/NACE/ISIC code crosswalks