Tools for API Development & Testing

API Development & Testing tools help developers design, simulate, test, document, and monitor APIs throughout their lifecycle—ensuring reliability, performance, and consistency across systems and clients.

Topics:API Design Tools REST & GraphQL Clients Mock Server Generators API Monitoring API Documentation Tools

Supabase

Build scalable apps with Postgres database, authentication, instant APIs, and more

Alternative to:

Firebase

PlanetScale

AppWrite

Build scalable apps with Postgres database, authentication, instant APIs, and more

Stars
83,707
Forks
8,767
Last commit
4 hours ago

Hoppscotch

Lightweight, fast, and feature-rich API client for developers. Test, debug, and document APIs with ease in a clean, modern interface.

Alternative to:

Postman

Testfully

Lightweight, fast, and feature-rich API client for developers. Test, debug, and document APIs with ease in a clean, modern interface.

Stars
71,896
Forks
4,937
Last commit
5 hours ago

Strapi

A powerful headless CMS that enables developers to build, deploy, and manage content-rich applications with customizable APIs and a user-friendly admin panel.

Alternative to:

Contentful

Sanity

A powerful headless CMS that enables developers to build, deploy, and manage content-rich applications with customizable APIs and a user-friendly admin panel.

Stars
66,830
Forks
8,593
Last commit
7 hours ago

PocketBase

Realtime database, authentication, file storage and admin dashboard for your next app

Alternative to:

Firebase

Supabase

AppWrite

Nhost

Realtime database, authentication, file storage and admin dashboard for your next app

Stars
47,532
Forks
2,363
Last commit
7 days ago

NocoDB

Transform any MySQL, PostgreSQL, or SQLite into a smart spreadsheet interface with APIs, automations, and integrations.

Alternative to:

Retool

Airplane

Airtable

Softr

Transform any MySQL, PostgreSQL, or SQLite into a smart spreadsheet interface with APIs, automations, and integrations.

Stars
54,654
Forks
3,897
Last commit
5 hours ago

Appwrite

Appwrite offers a comprehensive backend solution with authentication, databases, storage, and more, empowering developers to build robust applications efficiently.

Alternative to:

Retool

Firebase

Supabase

Airplane

Appwrite offers a comprehensive backend solution with authentication, databases, storage, and more, empowering developers to build robust applications efficiently.

Stars
50,562
Forks
4,423
Last commit
6 hours ago

Novu

Novu provides a unified API for sending notifications across multiple channels, with powerful workflows and integrations.

Alternative to:

Customer.io

Knock

Novu provides a unified API for sending notifications across multiple channels, with powerful workflows and integrations.

Stars
37,014
Forks
4,025
Last commit
7 hours ago

Appsmith

Appsmith is an open-source low-code platform that enables developers to rapidly build and deploy custom internal tools and applications.

Alternative to:

Retool

Airplane

Make

Power Apps

Appsmith is an open-source low-code platform that enables developers to rapidly build and deploy custom internal tools and applications.

Stars
37,111
Forks
4,072
Last commit
10 hours ago

Bruno

A modern, user-friendly API client that simplifies API testing and development with a clean interface and powerful features.

Alternative to:

Postman

Testfully

A modern, user-friendly API client that simplifies API testing and development with a clean interface and powerful features.

Stars
34,604
Forks
1,646
Last commit
4 hours ago

Insomnia

Intuitive API client for REST, GraphQL, and gRPC. Debug, test, and collaborate on APIs with ease across platforms.

Alternative to:

Postman

Testfully

Intuitive API client for REST, GraphQL, and gRPC. Debug, test, and collaborate on APIs with ease across platforms.

Stars
36,469
Forks
2,074
Last commit
7 hours ago

HTTPie

Intuitive, user-friendly CLI tool for making HTTP requests, debugging APIs, and testing web services with ease and efficiency.

Alternative to:

Postman

Testfully

Intuitive, user-friendly CLI tool for making HTTP requests, debugging APIs, and testing web services with ease and efficiency.

Stars
35,733
Forks
3,723
Last commit
5 months ago

Directus

A versatile headless CMS and API engine that simplifies data management, content creation, and application development.

Alternative to:

WordPress

Contentful

Sanity

A versatile headless CMS and API engine that simplifies data management, content creation, and application development.

Stars
30,742
Forks
4,222
Last commit
1 day ago

Hyperswitch

A unified payment infrastructure that connects multiple payment processors through a single API integration, enabling global payment processing

Alternative to:

Stripe Billing

PayPal Braintree

A unified payment infrastructure that connects multiple payment processors through a single API integration, enabling global payment processing

Stars
20,211
Forks
3,264
Last commit
2 hours ago

Saleor

Headless, API-first e-commerce solution with powerful features for customization, scalability, and seamless integration across channels.

Alternative to:

Sellfy

BigCommerce

Magento

Shopify

WooCommerce

Headless, API-first e-commerce solution with powerful features for customization, scalability, and seamless integration across channels.

Stars
21,620
Forks
5,704
Last commit
8 hours ago

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Tools for API Development & Testing

API Development & Testing tools help developers design, simulate, test, document, and monitor APIs throughout their lifecycle—ensuring reliability, performance, and consistency across systems and clients.

Supabase

Hoppscotch

Strapi

PocketBase

NocoDB

Appwrite

Novu

Appsmith

Bruno

Insomnia

HTTPie

Directus

Hyperswitch

Saleor

Command Menu

Supabase

Hoppscotch

Strapi

PocketBase

NocoDB

Appwrite

Novu

Appsmith

Bruno

Insomnia

HTTPie

Directus

Hyperswitch

Saleor