Development – Free-tier APIs
192 Free-tier APIs in the category Development. 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.
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
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
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
Netlify
Netlify is a hosting service for the programmable web
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
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
Postman
Tool for testing APIs
ProxyCrawl
Scraping and crawling anticaptcha service
ProxyForge
Free auto-updating list of live-tested proxies (HTTP/HTTPS/SOCKS4/SOCKS5), refreshed every 6 h
Pusher Beams
Push notifications for Android & iOS
QR code
Create an easy to read QR code and URL shortener
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
RealUptime
Manage uptime monitors, heartbeat checks, incidents and status pages with an API key
ReplyNodes
Convert a public web page into clean Markdown
ReqRes
A hosted REST-API ready to respond to your AJAX requests
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
Serialif Color
Color conversion, complementary, grayscale and contrasted text
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
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
SonarQube
SonarQube REST APIs to detect bugs, code smells & security vulnerabilities
StackExchange
Q&A forum for developers
Statically
A free CDN for developers
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
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
Tyk
Api and service management platform
URLpipe
Turn a URL into Markdown, screenshots, metadata or Lighthouse audits, rendered in real Chrome
Userstack
Secure User-Agent String Lookup JSON API
Utilorax
203 JSON endpoints: hashing, encoding, unit conversion, text, dates and file conversion
Vornamencheck
Gender probability for a first name, optionally per country; documentation in German
W3C Validator
Validate HTML and check markup errors
Web Metadata & Contact Extractor
Extract SEO metadata, contact emails, social links, and tech stack (<200ms)
Webclaw
Web content extraction for LLMs with scrape, crawl, search, and summarize
WebScraping.AI
Web Scraping API with built-in proxies and JS rendering
XLSX Inspector
Inspect XLSX/XLSM structure: sheets, formulas, macros and external links
ZenRows
Web Scraping API that bypasses anti-bot solutions while offering JS rendering, and rotating proxies