Developer Tool APIs

IPinfo's API provides accurate IP geolocation, ASN, carrier, privacy detection, and abuse contact data. Powers billions of lookups monthly with 99.99% uptime and global coverage.

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

Twitter/X public data REST API for tweet and profile lookup, follower analysis, social listening, market intelligence, and AI-agent workflows.

Screenshot API that renders a URL, HTML or Markdown in a real browser and returns a PNG, JPEG, WebP, PDF or scrolling video (MP4, WebM, GIF).

Project to promote open source collaboration during December

Estimates the age from a first name

The API is open source!

Library info on CDNJS

Status of all DigitalOcean services

Drupal.org

Evil Insults

Super simple file sharing, convenient, anonymous and secure

Estimates a gender from a first name

Test endpoints for client and server HTTP/2 protocol support

A simple IP Address API

Programming, Miscellaneous and Dark Jokes

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

Fake REST API for testing and prototyping

Estimate the nationality of a first name

Generate chart and graph images

A hosted REST-API ready to respond to your AJAX requests

World's most famous code hosting service. You can use the official Octokit library and other third-party libraries to extend and simplify how you use the GitHub API.

Uncovers the technologies used on websites and URL to thumbnail

API for Fake Data, image/video conversion, optimization, pdf optimization and thumbnail generation

Chrome based screenshot API for developers

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

Retrieve vendor details and other information regarding a given MAC address or an OUI

Create pixel-perfect website screenshots

API to scrape and crawl websites and extract clean, LLM-ready scrape markdown for AI agents, RAG pipelines, and knowledge bases.

The All-in-one API Platform

ALL-CAPS AS A SERVICE

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

Multiples services and public APIs

Real-time status monitoring for 270+ APIs and services

Extract device details from user-agent string

A simple IP Address API in JSON

Build a mock Rest API endpoint in seconds

JSON formatted details about Telegram Bots available in database

Free hosting for HTML, JSON, key-value, files, multi-file sites with short URLs and TTL retention

Structured changelog metadata from open source projects

Secure random string generator

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

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

CORS Proxy by Corsfix lets you instantly fetch any resource on the web and bypass CORS errors

Word-finding query engine

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

Free developer utility APIs: text, hash, JSON, random, time, regex

A simple JSON store API

A simple JSON store API

Temporary file hosting with upload API, expiration times, and view limits

A hassle free API for managing web fonts provided by Google Fonts

Fetch a random geeky/programming related joke for use in all sorts of applications

Create an image of your GitHub contributions

Add dynamically generated statistics to your GitHub profile ReadMe

Generate and decode / read QR code graphics

Basic DNS query via HTTP GET request

A Simple HTTP Request & Response Service

Get Epoch time

IP Address API

IFTTT Connect API

Generate link from image(Integration developer utility APIs)

Generate charts, QR codes and graph images

Generate charts, QR codes and graph images

Public IP Address API with company, ASN and hosting detection support

Fast, free, accurate IP geolocation and threat data (proxy/VPN/hosting detection) API

Check if websites and online services are currently down

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

Programming and general jokes

Creates diagrams from textual descriptions

File Sharing And Storage

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

Fake Rest API for developers

Open Source phone number validation

Multiple spam filtering service

No-signup link unfurl API returning Open Graph, Twitter Card and oEmbed metadata

Free JSON storage for small projects

Validate PHP code

An api which generates quotes from programmers

Programming Quotes API for open source projects

A collective list of free JSON APIs for use in web development

Validate Python code

Create an easy to read QR code and URL shortener

Generate and decode / read QR code graphics

Create an easy to read QR code and URL shortener

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

Quotable is a free, open source quotations API

Returns RSS feed in JSON format using feed URL

Color conversion, complementary, grayscale and contrasted text

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

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

Test data for testing and prototyping

Project Sonar DNS Enumeration API

Validate SQL query

A free CDN for developers

No-bullshit file hosting and URL shortening service

theodinproject.com

The Accelerator variant can be used to test & accelerate any DoH providers

A simple API to get information such as IP, ISP name, Location, etc. based on user request

Validate XML

Validate Kubernetes manifests

Abstract API provides a suite of utility APIs including email validation, phone validation, IP geolocation, VAT validation, currency exchange, and holiday data via simple REST endpoints.

Asana's API provides programmatic access to tasks, projects, teams, portfolios, and goals. Automate work management, build integrations, and sync data with Asana's project platform.

File Sharing and Storage

Automate the software development process using continuous integration and continuous delivery

The primary platform for Open Source and code sharing for the U.S. Federal Government

File Sharing and Storage

Automate GitLab interaction programmatically

File Sharing and Storage

Save & Share screen captures instantly

Hasura auto-generates a real-time GraphQL and REST API from your PostgreSQL, MySQL, or other databases. Manage permissions, actions, events, and remote schema integrations.

Retrieve structured data from a website or RSS feed

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

Notion's API provides access to pages, databases, blocks, users, and comments in Notion workspaces. Read and write structured data from Notion databases programmatically.

Product Hunt's GraphQL API provides access to products, posts, collections, topics, and user data. Discover and integrate trending tech products and startup launches.

Scraping and crawling anticaptcha service

Push notifications for Android & iOS

League of Legends Game Information

Q&A forum for developers

Simplified HTTP version of the MTProto API for bots

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

Free utility API platform. QR codes, screenshots, PDFs, image resize, hashing, and more

API hub with DNS, WHOIS, Screenshot, IP Geolocation, Weather, Commodity & Currency APIs

Schedule screenshots of web pages and sync them to your cloud

Headless browser API for automation, scraping, and more

SaaS API empowering the generation of screenshots or PDFs directly from HTML/CSS/JS code

Screenshot any URL via REST API with full-page, dark mode, retina, and custom wait selector support

Rust web data API: scrape, crawl, extract, screenshots, PDFs, and discover hidden site APIs

WHOIS domain name and hosted domain lookup

WHOIS domain name lookup

IP geolocation and reputation with proxy, VPN, and hosting detection

Full-page website screenshots with mobile and desktop emulation

Unofficial REST API for choosealicense.com

Headless Chrome scraping with a simple API

Take programmatic screenshots of web pages from any website

Capture screenshots and PDFs of any webpage via REST API

Web Scraping API with built-in proxies and JS rendering

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

Directus is an open-source headless CMS with a dynamic REST and GraphQL API automatically generated from any SQL database schema. Self-host or use Directus Cloud.

Sanity's Content Lake API provides real-time headless CMS access via GROQ queries and REST. Manage structured content, assets, and schemas for Sanity-powered applications.

Storyblok's API is a headless CMS that provides content delivery and management APIs. Manage stories, components, assets, and spaces for omnichannel content distribution.

Strapi is an open-source headless CMS with auto-generated REST and GraphQL APIs. Manage content types and entries with a customizable admin panel and plugin ecosystem.

Webflow's CMS API manages collections, items, sites, pages, and forms. Build headless CMS integrations, sync content, and automate publishing workflows for Webflow sites.

WordPress REST API provides endpoints for posts, pages, media, users, taxonomies, and custom post types. Build headless WordPress sites and automate content management workflows.

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

Building quick backends

Return a site's meta tags in JSON format

Bitbucket API

Build tool and processes integrations to create efficient development pipelines

The fastest continuous integration and continuous delivery platform

Canadian construction and development data from 17 cities

Codeship is a Continuous Integration Platform in the cloud

Codeship is a Continuous Integration Platform in the cloud

Used to retrieve and apply transformations to images

Execution accountability API for AI agents with scheduling, verification, and outcome confirmation

Service to manage your databricks account,clusters, notebooks, jobs and workspaces

File Sharing and Storage

Make bots for Discord, integrate Discord onto an external platform

Make bots for Discord, integrate Discord onto an external platform

A tool to detect face

Filestack File Uploader & File Upload API

A simple Open Source Football API to get squads’ stats, best scorers and more

Chat for GitHub

Unlimited size file uploads for free

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

Online REST API for Testing and Prototyping

REST API to programmatically create apps, provision add-ons and perform other task on Heroku

Domains Data API for Developers

Convert text to speech

Convert text to speech

Simple and quick private image sharing

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

Geolocation API,ASN API,IP Ranges API,IP Firewall API,Domain API

Online code execution system

Generate Open Graph social preview images from URL metadata

An open source platform for developer collaboration

For programmatically generating documentation for code

A RESTful API for flexible storage of JSON data

Netlify is a hosting service for the programmable web

File Sharing and Storage

File Sharing and Storage

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

Really simple API to retrieve Open Graph data from an URL

Medical platform which allows the development of applications for different healthcare scenarios

IPFS Pinning Services API

Tool for testing APIs

Create new QR Code or decode existing one

File Sharing and Storage for groups

Open Source Reddit Clone

Scraping API with Chrome fingerprint and residential proxies

Real-time, Scalable Proxy & Web Scraping REST API

Proxy API for Web scraping

Easy google sheets integration

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

Decentralized Open-Source Cloud Storage

Autogenerate images with template

Get structured SERP results from Google, Bing, Yandex, and others via one API

Extract web pages as Markdown or structured data for AI apps

VulDB API allows to initiate queries for one or more items along with transactional bots

File Sharing and Storage for Free with 1TB Space

Full stack project management

The Graph is an indexing protocol for querying blockchain data via GraphQL. Access indexed data from Ethereum, Polygon, and other networks through community-built subgraphs.

Airtable's API allows reading and writing records, managing tables, and handling attachments in Airtable bases. Use it to build automations and integrations with the flexible spreadsheet-database.

Alchemy's Web3 API provides enhanced node access, NFT data, transaction history, token balances, and webhook notifications across Ethereum, Polygon, Solana, and other blockchains.

Alpaca's Trading API provides commission-free stock and crypto trading, market data, and portfolio management. Build algorithmic trading bots and fintech apps with broker-dealer infrastructure.

AWS Lambda API enables invoking, managing, and configuring serverless functions. Create, update, and delete functions programmatically and integrate with other AWS services via event triggers.

AWS Simple Email Service API enables sending transactional and marketing emails at scale with high deliverability. Manage verified identities, sending quotas, and bounce/complaint handling.

AWS Simple Notification Service API enables pub/sub messaging, mobile push notifications, and SMS delivery. Create topics, manage subscriptions, and publish messages at scale.

Azure Functions management API enables deploying and managing serverless functions, triggers, bindings, and app settings on Microsoft Azure's event-driven compute platform.

Cal.com's API manages bookings, event types, availability, users, and webhooks for the open-source scheduling platform. Build calendar and scheduling integrations programmatically.

Cloudflare Workers API manages serverless functions deployed to Cloudflare's global edge network, including KV storage, D1 databases, R2 object storage, and Queues.

Convex is a backend-as-a-service platform offering a reactive database, serverless functions, file storage, and real-time subscriptions accessible via TypeScript SDK and HTTP actions.

Deno Deploy API manages projects and deployments on Deno's edge JavaScript/TypeScript runtime. Deploy serverless functions globally with built-in TypeScript support and no configuration.

Figma's API provides access to files, components, styles, comments, and team projects. Extract design tokens, automate design-to-code workflows, and build design system tooling.

Fly.io API enables programmatic management of applications, machines, volumes, and networking on the Fly.io global platform. Deploy Docker containers close to users worldwide.

Grafana's HTTP API enables management of dashboards, datasources, alerts, users, and organizations programmatically. Integrate with CI/CD pipelines and automate observability workflows.

Hashnode's GraphQL API provides access to posts, publications, tags, and user profiles on the developer blogging platform. Build integrations and automate content publishing.

Liveblocks API enables real-time collaboration features including presence, live cursors, shared state, comments, and notifications. Build collaborative document editors and multiplayer experiences.

Make's API manages scenarios, modules, connections, and executions on the visual automation platform. Build and trigger automated workflows connecting 1,000+ apps and services.

monday.com's GraphQL API provides access to boards, items, columns, updates, and automations. Build work management integrations and sync data with monday.com's platform.

MongoDB Atlas Administration API manages clusters, database users, network access, backups, and organizations. Automate cloud MongoDB infrastructure and integrate with DevOps pipelines.

n8n's REST API manages workflows, executions, credentials, and users on the open-source workflow automation platform. Self-host or use n8n Cloud for fair-code automation.

Neon's API manages serverless Postgres databases, branches, compute endpoints, and projects. Neon offers database branching, autoscaling, and scale-to-zero for modern apps.

New Relic's API provides access to application performance metrics, errors, infrastructure health, alerts, and dashboards. Automate observability and integrate monitoring workflows.

NCBI's E-utilities API provides programmatic access to PubMed abstracts, full-text articles, gene sequences, and other biomedical literature from the National Center for Biotechnology Information.

PyPI's JSON API provides package metadata, release information, download statistics, and vulnerability data for Python packages hosted on the Python Package Index.

Railway's API enables programmatic management of projects, services, deployments, and environments on the Railway cloud platform.

Render's API lets you manage web services, static sites, databases, cron jobs, and private services on the Render cloud platform programmatically.

Resend is an email API built for developers. Send transactional emails with React components, track deliverability, manage domains, and view analytics via a simple REST API.

Terraform Cloud's API manages workspaces, runs, state versions, variables, and organizations. Automate infrastructure provisioning workflows and integrate IaC into CI/CD pipelines.

Route planning algorithms and APIs…. Digitransit Platform is an open source journey planning solution that combines several open source components into a modern, highly available route planning service

« Return to TheBusHEA Web Services API The Web API (Application Programming Interface) allows a developer to access our real-time AVL data. To utilize OTS's web services, an application id (AppID)

Turso provides edge SQLite databases powered by libSQL. API manages databases, groups, and organizations with support for embedded replicas and multi-tenant architectures.

Upstash provides serverless Redis and Kafka with a REST API. Designed for edge and serverless environments with per-request pricing and global low-latency replication.

Vercel's API lets you manage deployments, domains, environment variables, projects, and teams programmatically. Integrates with Git to automate frontend deployment workflows.

Wix's REST API provides access to site data, members, contacts, orders, bookings, and blog posts. Build integrations and extend Wix-powered websites programmatically.

Wrike's API provides access to tasks, folders, projects, timesheets, and workflows. Automate project management and build integrations with Wrike's collaborative work platform.

DEV.to's API provides access to articles, comments, users, tags, and organizations on the developer community platform. Read and publish developer content programmatically.