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.
Invovate
Generate PDF, JSON & UBL invoices in 11 languages from one JSON POST
invowerk
Validate e-invoices (ZUGFeRD, Factur-X, XRechnung, Peppol BIS) and get a validation report
IP 2 Country
Map an IP to a country
IP Address Details
Find geolocation with ip address
IP Geolocation
Geolocate website visitors from their IPs
IP Vigilante
Free IP Geolocation API
ip-api
Find location with IP address or domain
IP-API.io
IP geolocation with VPN/proxy/Tor detection, reputation and risk score
ip-fast.com
IP address, country and city
ip2geo.dev
Programmatically convert IP addresses into geolocation data
IP2Location
IP geolocation web service to get more than 55 parameters
IP2Proxy
Detect proxy and VPN using IP address
IP2WHOIS Information Lookup
WHOIS domain name lookup
IP99
IP geolocation with proxy, VPN and datacenter risk and the age of the evidence
ipapi.co
Find IP address location information
ipapi.com
Real-time Geolocation & Reverse IP Lookup REST API
ipfind.io
Geographic location of an IP address or any domain name along with some other useful information
IPGEO
Unlimited free IP Address API with useful information
ipgeolocation
IP Geolocation AP with free plan 30k requests per month
ipgeolocationapi
IP geolocation with ASN, timezone, currency and threat data, 5,000 keyless calls a day
IPGuardian
Check IP addresses against 140+ public threat intelligence blocklists
IPify
A simple IP Address API
IPinfo
Another simple IP Address API
IPInfoDB
Free Geolocation tools and APIs for country, region, city and time zone lookup by IP address
IPLogs
Free VPN, proxy, Tor and datacenter IP detection. 13 sources, active probing
IPMA
Portuguese weather and climate data
IPScanner
IP network class (residential, mobile, hosting, VPN, residential proxy, Tor) with a confidence score
IPstack
Locate and identify website visitors by IP address
ipstack
Locate and identify website visitors by IP address
IPstack MCP
IP geolocation, threat and timezone lookups for agents
ipwhois
IP geolocation with country, city, coordinates, ISP, timezone and flag data
IPWhois.net Blacklist
Community IP blacklist to check and report abusive IP addresses
IQAir
Air quality and weather data
Irisnet
Realtime content moderation API that blocks or blurs unwanted images in real-time
Ironfang Render
Screenshots, PDFs, dynamic images, QR codes and video from URLs or HTML
Is This Site Down?
Check if any website is down, from two continents; live status, uptime history and TLS expiry
isEven (humor)
Check if a number is even
isitdownstatus
Check if websites and online services are currently down
isMalicious
Reputation of IPs, domains, URLs and file hashes from aggregated threat feeds, plus CVE lookups
ISRO
ISRO Space Crafts Information
Istanbul (İBB) Open Data
Data sets from the İstanbul Metropolitan Municipality (İBB)
ITIS
Integrated Taxonomic Information System
ItsThisForThat
Generate Random startup ideas
IUCN
IUCN Red List of Threatened Species
Jamendo
Music
JCDecaux Bike
JCDecaux's self-service bicycles
Jikan
Unofficial MyAnimeList API
Jina AI
Free AI API for embeddings, reranking, and text processing
JioSaavn
API to retrieve song information, album meta data and many more from JioSaavn
JIRA
JIRA is a proprietary issue tracking product that allows bug tracking and agile project management
JobDataLake
1M+ enriched job listings from 20,000+ companies with salary, skills, seniority
Jobs2Careers
Job aggregator
JobsPipe
Live job postings from 30+ ATS feeds and job boards in one normalized JSON schema
Jobven
Job postings tracked as roles open and close, with webhooks on changes, from employer career pages
JokeAPI
Programmable jokes in multiple languages with filtering options
JokeAPI
Programming, Miscellaneous and Dark Jokes
Jokes One
Joke of the day and large category of jokes accessible via REST API
Jooble
Job search engine
Joshua Project
People groups of the world with the fewest followers of Christ
jsDelivr
Package info and download stats on jsDelivr CDN
JSON 2 JSONP
Convert JSON to JSONP (on-the-fly) for easy cross-domain data requests using client-side JavaScript
JSON2Video
Create and edit videos programmatically: watermarks,resizing,slideshows,voice-over,text animations
JSONbin.io
Free JSON storage service. Ideal for small scale Web apps, Websites and Mobile apps
JsonFabrica
Generate realistic relational synthetic JSON test data from reusable templates
JSONPlaceholder
Fake REST API for testing and prototyping
jstash
Save JSON with one request and get a URL; private JSON for each signed-in user of your app
Judge0 CE
Online code execution system
justmeme.wtf
Free meme API with 2400+ templates, search, trending, and AI generation
Kaggle
Create and interact with Datasets, Notebooks, and connect with Kaggle
kanari
Real-time worldwide wildfire detections, water bomber tracking and open fire archive
kanye.rest
REST API for random Kanye West quotes
Katalis
UK company checks: payment practices, contracts won, registers, filed accounts, change feed
Kavel
Generate and edit images with AI, no key or account required
KDP Intelligence
KDP niche demand scores, competition analysis and revenue estimates
Keen IO
Data Analytics
KEGG
Genes, pathways, compounds and reactions
keycdn IP Location Finder
Get the IP geolocation data through the simple REST API. All the responses are JSON encoded
Keyvalue
Simple key-value storage REST API for quick prototyping
Kickbox
Email verification API
KinoPipe
Typed hosted video editing operations for agents and automation
Kitsu
Anime discovery platform
KKBOX
Get music libraries, playlists, charts, and perform out of KKBOX's platform
Klarna
Klarna payment and shopping service
KNMI
Dutch weather, radar and climate data
KontragentPro
Russian company data from state registers by INN or OGRN: profile, finances, timeline
KPainter
Create video, image, and interactive app outputs from prompts or source files
KrakenKeys
Steam game key price comparison across 20+ stores, deals, and price history
Kroger
Supermarket Data
Kroki
Creates diagrams from textual descriptions
KuCoin
Cryptocurrency Trading Platform
Kuro
Create AI images, video clips, voice-overs, music and editable storyboard films
Kvartiry-Phuket
Russian-language Phuket real estate guides, asking prices, condo assessment rates, weather, beaches
L2 Calendar
Lineage 2 private servers list with names, websites, chronicles, rates and opening dates
Labelixa
Render, validate and generate Zebra ZPL label barcodes as PNG/PDF
Lacuna
Public board where AI agents post problems as seeks and agents who solved them offer help
Land Transport Authority DataMall, Singapore
Singapore transport information
Langbly
Context-aware text translation and language detection for 100+ languages
Lanyard
Retrieve your presence on Discord through an HTTP REST API or WebSocket
LastFm
Music
LatLng
Geocoding, reverse geocoding, places, and static maps