Free Developer Tools APIs

Repos, users, issues and search for the whole public GitHub — the developer's Swiss army knife.

Metadata for every npm package — versions, downloads, dependencies.

Package info for the whole Python ecosystem in JSON.

Live Hacker News stories, comments and users via Firebase — no key, realtime.

The HTTP request/response playground — echoes headers, tests methods, delays and more.

Search SSL certificate transparency logs for any domain — a security research staple.

A hosted REST API for front-end testing with realistic user data and auth flows.

Check passwords and emails against known data breaches — the original breach database.

Search engine for internet-connected devices, with a small free tier.

Scan URLs and files against 70+ antivirus engines with a free community key.

Easy to implement, adaptable authentication and authorization platform

Passkey-first authentication

Implement OTP flow quickly

Secure and modern passwordless authentication platform

User infrastructure for modern applications

File Sharing and Storage

Manage Databricks workspaces, clusters, jobs, and notebooks via a Rest API

File Sharing and Storage

Open-source storage framework enabling Lakehouse architecture with Spark, PrestoDB, Flink, Trino, Hive, and APIs

File Sharing and Storage

S3-compatible object storage API (formerly Web3 Storage)

Unlimited size file uploads for free

File Sharing and Storage

Simple and quick private image sharing

File Sharing and Storage

Plain Text Storage

IPFS Pinning Services API

Upload large files on websites, mobile apps, SaaS solutions and custom workflows

No-bullshit file hosting and URL shortening service

EU-hosted file transfer: create transfers, upload files with tus and read per-recipient download receipts. Up to 10 GB free per transfer

Resource health helps you diagnose and get support when an Azure issue impacts your resources

Build tool and processes integrations to create efficient development pipelines

Automate the software development process using continuous integration and continuous delivery

Codeship is a Continuous Integration Platform in the cloud

Get AWS service price right from your terminal

Sync your GitHub projects with Travis CI to test your code in minutes

Verify emails, phone numbers, and addresses with real-time accuracy. Keep your contact data clean, compliant, and reliable with our all-in-one suite

Official French address validation service

Connection for brevo CRM suite

EU VAT (VIES), IBAN and EORI validation with company name & address lookup

Validate e-invoices (ZUGFeRD, Factur-X, XRechnung, Peppol BIS) and get a validation report

US Address Verification

Verify charities via EIN using IRS, PUB78, BMF & OFAC data for compliance and legitimacy

Test api server to receive and return value from HTTP method

Content validator against profanity & obscenity

Enter address data quickly with real-time address suggestions

Extract postal addresses from any text including emails

Validate and append data for any US postal address

This API validates postal codes within UK

VAT Number Validation & Lookup REST API

Verify academic credentials — search 912K+ schools, detect diploma mills worldwide

Free and simple counting service. You can use it to track page hits and specific events

Take programmatic screenshots of web pages from any website

34+ AI agent infrastructure services including memory, wallets, and scheduling

Search and compare developer free tiers, startup credits, and pricing changes

Website screenshots and PDFs with full-page capture, dark mode, ad blocking and bulk requests

Amazon product, search & batch scraping API with residential proxies (1000 free)

Multiples services and public APIs

World-class APIs in a single hub

Extract device details from user-agent string

Chrome based screenshot API for developers

APILayer is a unified API marketplace with 40+ production-ready APIs for finance, geolocation, weather, data, and AI. Trusted by 2.2M+ developers

Wikipedia for Web APIs, OpenAPI/Swagger specs for public APIs

Build and ship applications that scale using certified APIs for every use case

App Store and Google Play reviews, ratings, rankings and app metadata

Our SERP API delivers lightning-fast Google search results at unbeatable prices. Built for developers who need reliable, scalable access to search data without the complexity of we

The Azure DevOps basic components of a REST API request/response pair

Build a mock Rest API endpoint in seconds

Bitbucket API

Schedule screenshots of web pages and sync them to your cloud

An index of billions of pages in a single call

Free instant hosting for HTML, Markdown, JSON, and files. No signup

Headless browser API for automation, scraping, and more

Easily make screenshots of web pages in any screen size, as any device

Library info on CDNJS

Secure random string generator

AI visibility scoring for domains: ADP, llms.txt, Schema.org, MCP endpoints

Get IP Address, Timestamp, User Agent, Country Code, IATA, HTTP Version, TLS/SSL Version & More

OpenAI Codex usage-limit reset history, verified announcements and 24h/48h reset probability

Used to retrieve and apply transformations to images

Real-time public data, ready to use. Extract web data from Amazon, TikTok, Google Maps and more with 100+ ready-made tools

Get around the dreaded CORS error by using this proxy as a middle man

Corsfix lets you fetch any resource and bypass CORS errors, free for development environment

Live public Google and LinkedIn data as clean JSON

Convert CSV files to JSON with this API. Ideal for developers who want to automate data workflows and integrate structured data

Screenshot API: any URL, HTML or Markdown to PNG, JPEG, WebP, PDF or scrolling video, with full page, devices, dark mode and ad blocking

Developer-first APIs. Enterprise-ready infrastructure. Sampla data, avatars, image processing and a lot more.

Interact with Docker Hub

Domain name search to find all domains containing particular words/phrases/etc

Real-time status for GitHub, AWS, Discord and 90+ services

A simple JSON store API

Live fire hydrant data: location, flow rate in GPM, and whether each hydrant is in or out of service. Sourced from the fire departments that maintain them

Deterministic tools for AI agents: X12 EDI, check digits, time, cron, JSON repair

Create and manage customizable forms within your applications

Generate styled, accessible HTML forms from JSON definitions with validation

Hosted JSON storage: save JSON with one HTTP request and get a URL any website can fetch

Netbait is a free IP reputation API designed to help users determine whether an IP address has been involved in attacks, scanning attempts, or other malicious a

The web data & SERP API stack for AI engineers, app developers, and GTM teams. 40+ fast and reliable APIs for accurate, real-time public data from across the we

Dynamically capture full page screenshots of websites.

Get Published content into your Website, App or other embedded media

Make use of GitHub repositories, code and user info programmatically

Automate GitLab interaction programmatically

API to read, write, and format Google Docs documents

Google's mobile application development platform that helps build, improve, and grow app

Metadata for all families served by Google Fonts

API to read, write, and format Google Keep notes

API to read, write, and format Google Sheets data

API to read, write, and format Google Slides presentations

GraphQL and REST API Engine with built in Authorization

A lightweight, fast, and customizable app for testing and designing APIs. A free, fast, and beautiful

Domains Data API for Developers

a free command-line HTTP client for the API era

API for domain search, professional email finder, author finder and email verifier

Convert text to speech

IFTTT Connect API

Generate charts, QR codes and graph images

Retrieve structured data from a website or RSS feed

A free API client that allows you to design, debug, test, and mock APIs locally, on Git, or cloud.

Geographic location of an IP address or any domain name along with some other useful information

WHOIS domain name lookup

Geographic location of an IP address or any domain name along with some other useful information

A simple IP Address API

IP geolocation and threat data API

A free IP Geolocation and proxy/tor/VPN detection API

Package info and download stats on jsDelivr CDN

Convert JSON to JSONP (on-the-fly) for easy cross-domain data requests using client-side JavaScript

Free JSON storage service. Ideal for small scale Web apps, Websites and Mobile apps

Hassle-free JSON hosting. Convert your JSON file to an API in minutes at no cost.

Creates diagrams from textual descriptions

Release dates, end-of-life dates, system requirements, security bulletins and patches for Magento Open Source, Adobe Commerce and Mage-OS versions

This API lets you upload and transform a Markdown file to HTML

Upload Markdown and get JSON with one API call

Extract metadata, Open Graph tags, and structured data from any URL

Get IP address information

Transform MySQL EXPLAIN output to interactive graphs

Serverless PostgreSQL with a REST API to manage projects, branches and run SQL over HTTP

Netlify is a hosting service for the programmable web

Network calculators, including subnets, DNS, binary, and security tools

hCaptcha solver API: submit a sitekey and page URL, get back a valid hCaptcha token. Supports regular, invisible and enterprise sitekeys

Query information about your favorite Node.js libraries programmatically

AI-native web search, scraping, and crawling API that delivers clean, structured, real-time web data. Used by top AI companies

API for calculating and comparing metrics of different websites using Page Rank algorithm

The All-in-one API Platform

Capture HTTP, email and DNS callbacks in private inboxes for integration testing, with REST access and cursor-based waiting

Screenshot, PDF, video recording, OG image, and page inspection via REST API

A self-hostable API that returns randomized messages for past-due invoices

Pipedream is the fastest way to build powerful applications that connect all the services in your stack

Schedule webhooks for future delivery with retries and delivery tracking

Tool for testing APIs

Secure AI APIs in iOS - No SDK, Just Change Your API URL

API of self-hosted Proxmox VE. Address: https://your.server:8006/api2/json/ (configuring in installation process)

Scraping and crawling anticaptcha service

Push notifications for Android & iOS

Realtime features

Create an easy to read QR code and URL shortener

Static and Dynamic QR code generator with custom and unique QR code design

Integrate custom and unique looking QR codes into your system or workflow

Generate chart and graph images

One API for 185+ live web data sources including search, social, e-commerce, real estate, jobs and finance, returning clean JSON

Returns RSS feed in JSON format using feed URL

Scraping API with Chrome fingerprint and residential proxies

Easily build scalable web scrapers

Undetectable web scraping API

Web scraping API that renders every page in a real browser, gets past Cloudflare, DataDome, PerimeterX and Akamai, and returns HTML or parsed JSON

Scrapfly is an enterprise-grade solution providing Web Scraping API that aims to simplify the scraping process by managing everything: real browser rendering, rotating proxies, and

Headless Chrome scraping with a simple API

Proxy API for Web scraping

Success-only web scraping API — credits are only charged when a scrape actually succeeds, no charge on failed requests

Screenshot API for developers that captures any URL in one HTTP request with predictable output

Website screenshots, PDFs, HTML rendering, caching, and webhooks

Screenshot API, 1000 free requests per month

Convert URLs, HTML, or Markdown into PNG, JPEG, WebP, or PDF with a simple screenshot API

Screenshot and video capture API to transform any URL into high-quality images and recordings

Open-source meta-search engine aggregating results from multiple sources

Comprehensive SEO audit with 28 checks, scoring, and prioritized recommendations

The Generate SEO Tags API generates all the most important META tags based on any content

Color conversion, complementary, grayscale and contrasted text

Check realtime Google SERP Rank of any keywords

SerpApi's Search API makes it easy and fast to scrape Google and other search engines

Service for generating data and executing logic to create various games and puzzles

Easy Google Sheets and Excel Online API

Easy google sheets integration

Developer utility API with 13+ tools: QR codes, screenshots, image processing, hashing, and more

Project Sonar DNS Enumeration API

SonarQube REST APIs to detect bugs, code smells & security vulnerabilities

CSV to JSONL conversion API

Q&A forum for developers

A free CDN for developers

Scrape YouTube, web, and files into text. Get AI-ready, clean data for your next project.

Webhooks as a Service

Get structured results from Google, Bing, Yandex, and DuckDuckGo through one API, with fast, reliable responses

Serverless Redis, Kafka and vector database with REST APIs

Markdown, rendered HTML, screenshots, metadata, console errors and Lighthouse audits for any URL, rendered in real Chrome

User agent parsing API is designed to help you better understand and interact with your users. By identifying browser, device, and OS data from user agent strings, this API empower

Extract structured data from any public URL

Web Scraping API with built-in proxies and JS rendering

Convert YAML to JSON (on-the-fly)

Web Scraping API that bypasses anti-bot solutions while offering JS rendering, and rotating proxies

Search among openly licensed and public domain works

Drupal.org

Evil Insults

Create an image of your GitHub contributions

Add dynamically generated statistics to your GitHub profile ReadMe

An open source Business Intelligence server to share data and analytics inside your company

Managed SERP API for Google, Bing, Yandex and more. Get live browser-rendered search results through a single API with data extraction

Concise, consistent, and legible badges in SVG and raster format

Get access to Codeforces data

Expired Domains API for SEO Experts and Agencies

For compiling and running code in several languages

Run JMESPath queries on JSON data for filtering, transforming, and extracting results

Online code execution system

PHP syntax checker

Validate Python code syntax

Validate SQL queries

A simple URL shortener

URL shortener and link management

URL shortening service with analytics and tracking capabilities

URL shortener service

Free URL Shortener offers a powerful API to interact with other sites

URL shortener API with branded domains, click tracking, smart redirects, and webhooks

Custom URL shortener for sharing branded links

Free URL shortener with custom alias, max-clicks, password protection and advanced analytics support

URL shortener and link management service

Shorten long URLs

Easy and fast masked, shortened link creation