Public APIs: Development

212 in APIs and services, most used first. Page 1 of 2.

24 Pull Requests Project to promote open source collaboration during December
Aether Bridge Autonomous agent team management and API workflow orchestration
Agent Nexus Continuously probed registry of APIs, MCP servers and CLIs callable by agents
AgentPay Domain Lookup DNS records, WHOIS/RDAP, IP ownership and domain reports for AI agents, paid per call via x402
Agify.io Estimates the age from a first name
Allscreenshots Website screenshots and PDFs with full-page capture, dark mode and ad blocking
Amazonscraperapi Amazon product, search & batch scraping API with residential proxies (1000 free)
AmberOne Turn any website into a build-ready Android, iOS, PWA or Electron app project
AnswerLine Answers, citations and sources from AI assistants and Google surfaces through one API
API Grátis Multiples services and public APIs
API Tool Calls API Tool Calls: Home cost planners, page to Markdown, SEO checks and recalls
ApicAgent Extract device details from user-agent string
ApiFlash Chrome based screenshot API for developers
APIs.guru Wikipedia for Web APIs, OpenAPI/Swagger specs for public APIs
APIzone Independent uptime & status monitoring for 200+ popular APIs
Aquanode Live GPU rental prices and availability across nine cloud providers
Azure DevOps The Azure DevOps basic components of a REST API request/response pair
Base Building quick backends
Beeceptor Build a mock Rest API endpoint in seconds
Blague.xyz La plus grande API de Blagues FR/The biggest FR jokes API
Blitapp Schedule screenshots of web pages and sync them to your cloud
Blynk-Cloud Control IoT Devices from Blynk IoT Cloud
Bored Find random activities to fight boredom
BountyCheck Claimability verdicts for GitHub bounty issues; free stats and sample, checks paid per call via x402
Brainshop.ai Make A Free A.I Brain
BrewPage Free hosting for HTML, JSON, key-value, files, multi-file sites with short URLs and TTL retention
Browshot Easily make screenshots of web pages in any screen size, as any device
CDNJS Library info on CDNJS
Changelogs.md Structured changelog metadata from open source projects
ChartBytes Chart image API: turn a URL into a PNG or SVG chart (bar, line, area, scatter, pie, donut, stacked)
Ciprand Secure random string generator
claudecookie Convert cookie formats, check Claude sessions and generate Claude Code credentials
Cloudflare Trace Get IP Address, Timestamp, User Agent, Country Code, IATA, HTTP Version, TLS/SSL Version & More
Codeberg Git hosting, repos and issues via Gitea API
Codex Online Compiler for Various Languages
Contentful Images Used to retrieve and apply transformations to images
CORS Proxy Get around the dreaded CORS error by using this proxy as a middle man
CountAPI Free and simple counting service. You can use it to track page hits and specific events
Crawl Readiness Check what 50+ AI crawlers can read on a website and whether a page permits an AI use
crawlbrulee EU-native web scraping for AI agents & developers: turn any page into markdown, screenshots and more
CurlShot Screenshots, PDFs and scrolling videos of any URL, HTML or Markdown; free tier
Diagrams.so Generate editable draw.io architecture diagrams from text or infrastructure code
DigitalOcean Status Status of all DigitalOcean services
DigMyName Domain availability and registrar pricing across 52 TLDs
Domain Info by LifeStep DNS records, SPF/DMARC detection and TLS certificate expiry
DomainDb Info Domain name search to find all domains containing particular words/phrases/etc
dotsweep Domain availability across 1200+ TLDs with registration and renewal prices
DownStatus Real-time status for GitHub, AWS, Discord and 90+ services
EndOfLife.date Software end-of-life dates and support lifecycles
Enterno HTTP headers, DNS, SSL, WHOIS and redirect checks as plain text, JSON or CSV
ExtendsClass JSON Storage A simple JSON store API
Fair Draw Verifiable random draws bound to the drand public randomness beacon
Framejet Website screenshot API with cookie banners and chat widgets removed; free tier
GcrawlAI Web scraping, SERP API, screenshots, URL to Markdown and prebuilt extractors
GeekFlare Provide numerous capabilities for important testing and monitoring methods for websites
Genderize.io Estimates a gender from a first name
GeraCode Barcode (EAN-13, UPC-A, Code 128, ITF-14) and QR code images, PNG or SVG. Docs in Portuguese
GETPing Trigger an email notification with a simple GET request
GithubTrends GitHub Trending repositories with star history and open-source alternatives to paid tools
Gitter Chat for Developers
Glitterly Image generation API
Go Module Proxy Go module versions and source metadata
Google Docs API to read, write, and format Google Docs documents
Google Firebase Google's mobile application development platform that helps build, improve, and grow app
Google Fonts Metadata for all families served by Google Fonts
Google Keep API to read, write, and format Google Keep notes
Google PageSpeed Insights Website performance and Lighthouse audit scores
Google Sheets API to read, write, and format Google Sheets data
Google Slides API to read, write, and format Google Slides presentations
Gorest Online REST API for Testing and Prototyping
Hasura GraphQL and REST API Engine with built in Authorization
Hex Elixir and Erlang package versions and docs
Hipsum Hipster-themed lorem ipsum generator for placeholder text
Homebrew Formulae Package and cask data for the Homebrew package manager
host-t.com Basic DNS query via HTTP GET request
Host.io Domains Data API for Developers
HostDealRadar Source-backed hosting price and provider record lookup
Hourora Current time, DST-aware conversion, all IANA zones with clock changes, city and coordinate lookup
HTTP2.Pro Test endpoints for client and server HTTP/2 protocol support
Httpbin A Simple HTTP Request & Response Service
Hunter API for domain search, professional email finder, author finder and email verifier
IBM Text to Speech Convert text to speech
Icanhazepoch Get Epoch time
Icanhazip IP Address API
IFTTT IFTTT Connect API
Image-Charts Generate charts, QR codes and graph images
import.io Retrieve structured data from a website or RSS feed
Index Agentica Agent-first directory of skills, MCP servers, tools, protocols and APIs as JSON, markdown, llms.txt
ip-fast.com IP address, country and city
IP2WHOIS Information Lookup WHOIS domain name lookup
ipfind.io Geographic location of an IP address or any domain name along with some other useful information
IPify A simple IP Address API
IPinfo Another simple IP Address API
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
isitdownstatus Check if websites and online services are currently down
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
JSONbin.io Free JSON storage service. Ideal for small scale Web apps, Websites and Mobile apps
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
Keyvalue Simple key-value storage REST API for quick prototyping
Kroki Creates diagrams from textual descriptions
Labelixa Render, validate and generate Zebra ZPL label barcodes as PNG/PDF
License-API Unofficial REST API for choosealicense.com
Litport Free Proxy Live-tested HTTP, SOCKS4, and SOCKS5 proxies with latency, uptime, and geolocation
LiveOrDown Live up/down status of 240+ online services, checked every minute from 3 regions
Logs.to Generate logs
Lua Decompiler Online Lua 5.1 Decompiler
MAC address vendor lookup Retrieve vendor details and other information regarding a given MAC address or an OUI
macadress MAC address and OUI vendor lookup synced from IEEE, with randomized-MAC detection
Micro-SaaS AI Suite 8 serverless AI APIs for sentiment analysis, copy generation, email verification, & OCR
MicroENV Fake Rest API for developers
Mocky Mock user defined test JSON for REST API endpoints
msgboard Public message board for agent-to-agent messaging, no account or key
MY IP Get IP address information
MyIPRightNow Public IP address with network, location, and connection details
NameGender Gender from a first name, full name, email or username, with probability
Nationalize.io Estimate the nationality of a first name
Nerdulator Everything derivable from one value: numbers, dates, colours, UUIDs, cron expressions
NetworkCalc Network calculators, including subnets, DNS, binary, and security tools
npm Registry Query information about your favorite Node.js libraries programatically
NuGet .NET package versions, metadata and search
OneSignal Self-serve customer engagement solution for Push Notifications, Email, SMS & In-App
Open Page Rank API for calculating and comparing metrics of different websites using Page Rank algorithm
Open VSX Search and access VS Code extensions from the Open VSX registry
OpenAPIHub The All-in-one API Platform
OpenApps Rankings, launches and featuring across the ChatGPT, Claude, Cursor and Grok Bot app stores
OpenGraphr Really simple API to retrieve Open Graph data from an URL
OpenQR Generate QR codes and manage dynamic (editable) QR codes with scan analytics
Orca Scan Generate barcode images (QR, Code 128, EAN, Data Matrix and more) in SVG, PNG, JPG or PDF
OutageDeck Live status and incidents for 170+ cloud and SaaS providers from official feeds
oyyi API for Fake Data, image/video conversion, optimization, pdf optimization and thumbnail generation
Packagist PHP Composer package versions and dist metadata
PageCDN Public API for javascript, css and font libraries on PageCDN
Peak Cloudflare Turnstile and 5-second challenge solving, pay per successful solve, 1,000 free solves
ProxyCrawl Scraping and crawling anticaptcha service
ProxyForge Free auto-updating list of live-tested proxies (HTTP/HTTPS/SOCKS4/SOCKS5), refreshed every 6 h
ProxyKingdom Rotating Proxy API that produces a working proxy on every request
Pusher Beams Push notifications for Android & iOS
QR & Barcode QR codes and barcodes (Code 128, EAN-13, Data Matrix, PDF417 + more). SVG or PNG output
QR code Create an easy to read QR code and URL shortener
QR code Generate and decode / read QR code graphics
QR Code by LifeStep Generate QR codes as PNG or SVG with size, border and color options
QR Code Crafter Generate static QR codes in SVG, PNG, JPG, WebP, PDF, or EPS
QR Codes Generate QR codes via a single GET request, with logo embedding and custom colors
Qrcode Monkey Integrate custom and unique looking QR codes into your system or workflow
QRX Artistic, branded QR codes from a text prompt and a link, checked to scan
QuickChart Generate chart and graph images
Quotable Random quotes with authors and tags
Random Stuff Can be used to get AI Response, jokes, memes, and much more at lightning-fast speed
RealUptime Manage uptime monitors, heartbeat checks, incidents and status pages with an API key
Rejax Reverse AJAX service to notify clients
ReplyNodes Convert a public web page into clean Markdown
ReqRes A hosted REST-API ready to respond to your AJAX requests
RSS feed to JSON Returns RSS feed in JSON format using feed URL
RubyGems Ruby gem metadata, versions, dependencies and search
SavePage.io A free, RESTful API used to screenshot any desktop, or mobile website
ScrapeNinja Scraping API with Chrome fingerprint and residential proxies
ScraperApi Easily build scalable web scrapers
scraperBox Undetectable web scraping API
scrapestack Real-time, Scalable Proxy & Web Scraping REST API
ScrapingAnt Headless Chrome scraping with a simple API
ScrapingBot Web scraping, AI extraction, and public TikTok, Instagram, Google and Amazon data as JSON
ScrapingDog Proxy API for Web scraping
Scrappa Google Search, Maps, Jobs, YouTube and review site results as structured JSON
Scrax Web scraping API that only bills for successful scrapes
Screenshot Take programmatic screenshots of web pages from any website
Screenshot Happy Website screenshot API (PNG/JPEG/PDF) with full-page capture and visual-diff monitors
ScreenshotAPI.net Create pixel-perfect website screenshots
SegmentLite Lightweight event routing and webhook fan-out API alternative to Segment
seodata Keyword search volume, CPC and competition by country, no key needed
Serialif Color Color conversion, complementary, grayscale and contrasted text
SerpKite Google Search, News, Maps, Images, Scholar and Patents results as JSON or Markdown for AI agents
Serply Google, Bing, News, Scholar and Maps search results and page scraping as JSON
serpstack Real-Time & Accurate Google Search Results API
Sheetsu Easy google sheets integration
Shotanvil Screenshot, PDF and HTML rendering API with a free tier, API key or x402 auth
Shotkiln Screenshots, PDFs and Open Graph images from a URL or HTML, with a free tier
SHOUTCLOUD ALL-CAPS AS A SERVICE
SiteIntel Extract metadata, tech stack, emails, and screenshots from any URL
SnapRender Website screenshots as PNG, JPEG, WebP or PDF, and page content as markdown, with a free tier
SnoopScan Scrape, crawl, map and search the web as clean markdown or JSON, with a free monthly tier
SolidPing Create and run uptime checks, read results and incidents, manage status pages, with a free tier
Sonar Project Sonar DNS Enumeration API
StackExchange Q&A forum for developers
Statically A free CDN for developers
Supportivekoala Autogenerate images with template
Suprsonic Unified agent API: search, scrape, enrich, image gen, TTS, STT, messaging. One key, 20+ capabilities
Talordata SERP data from major search engines with a free trial
TheQRCode Generate QR codes for URLs, WiFi, contact cards, email and text, with custom colors and styling
Thunder Client API testing tool
Thunderbit Extract web pages as Markdown or structured data for AI apps
TidyTools Web page to clean Markdown and AI crawler robots.txt checks, free without a key (rate limited)
Timezone WorldTime Current time, UTC offset and DST for any time zone or IP, a drop-in WorldTimeAPI replacement
Timezones Time now, conversions and DST changes for every IANA time zone, no key needed
TinyMind Agent Tools Free APIs by an AI agent on a VPS: actor lookup, word-of-the-day, poems, jokes, ping
ToolForte Deterministic utilities: IBAN/VAT validation, cron parsing, regex, diffs, Dutch holidays, test data
unfurlr Link-preview metadata for any URL: title, Open Graph, Twitter tags, favicon, oEmbed
URLpipe Turn a URL into Markdown, screenshots, metadata or Lighthouse audits, rendered in real Chrome