Best Tools For API Testing

Validate your API's functionality with these top tools and resources. Our collection features free and paid options for testing APIs, gRPC requests, GraphQL queries and service mocking.

Fake API

API Testing

Free public API to test API endpoints and retrieve dummy JSON data swiftly.

Free

OpenAPI AutoSpec

API Testing

Automatically generates OpenAPI specifications in real-time.

Free

Keploy

API Testing

Generate tests and stubs for your application that actually work!

Free

Firecamp

API Testing

Design, develop, test, and document their APIs effortlessly.

Free Plan

gaxios

API Testing

An HTTP request client that provides an Axios-like interface over top of node-fetch.

Free

Bruno

API Testing

Opensource IDE For Exploring and Testing Api's (lightweight alternative to postman/insomnia)

Free

Mokku

API Testing

Mock API calls seamlessly

Free

Mountebank

API Testing

Over the wire test doubles

Free

snapstub

API Testing

Snapshot-based stub/mocking of APIs.

Free

Insomnium

API Testing

Privacy-focused and 100% local API testing tool.

Free

OpenAPI DevTools

API Testing

Chrome extension that generates API specs for any app or website

Free

PactumJS

API Testing

A REST API testing tool to automate e2e, integration, contract, and component (or service-level) tests.

Free

Fetchbook

API Testing

CLI tool to run and test your HTTP requests. Git friendly, 100% local.

Free

RecipeUI

API Testing

Open source Postman alternative with type safety built in.

Free

Postman Contract Test Generator

API Testing

Dynamic Test Generation with Open API Spec 3.0 and Postman

Free

GraphQL Network Inspector

API Testing

A better network inspector for viewing and debugging GraphQL requests in Chrome and Firefox.

Free

Thunder Client- VS Code

API Testing

Thunder Client is a lightweight Rest API Client Extension for Visual Studio Code

Free

ezy

API Testing

GUI client for gRPC/gRPC-Web

Free

ProAutoma API Tester

API Testing

Online REST API client

Free with Paid Plan

Mockoon

API Testing

Create mock APIs in seconds

Free with Paid Plan

Mock Service Worker

API Testing

Mock API by intercepting requests on the network level. Seamlessly reuse the same mock definition for testing, development, and debugging.

Free

Mocks Server

API Testing

Node.js mock server running live, interactive mocks in place of real APIs

Free

Dummy

API Testing

Run mock server based off an API contract with one command

Free

Json Model Validator

API Testing

A flexible, lightweight JSON Data validator and formatter

Free

OC Mock

API Testing

mock object testing framework that can be used to create stubs in iOS apps.

Free

Advanced REST Client

API Testing

A better API testing tool

Free

vcrpy

API Testing

Automatically mock your HTTP interactions to simplify and speed up testing

Free

ReqBin

API Testing

ReqBin is an online API testing tool for REST and SOAP APIs.

Free

httpbin.org

API Testing

HTTP Request & Response Service, written in Python + Flask.

Free

Moq

API Testing

The most popular and friendly mocking framework for .NET

Free

URL Fetch

API Testing

Code Generator for HTTP Requests

Free

Learn REST: A RESTful Tutorial

API Testing

Learn everything there is to know about REST apis with the this opensource resource.

Free

Ajv JSON schema validator

API Testing

Security and reliability for JavaScript applications

Free

Prestige

API Testing

A text-based HTTP client in the browser, an interface-less Postman.

Free

Best Tools For API Testing

Validate your API's functionality with these top tools and resources. Our collection features free and paid options for testing APIs, gRPC requests, GraphQL queries and service mocking.

Validate your API's functionality with these top tools and resources. Our collection features free and paid options for testing APIs, gRPC requests, GraphQL queries and service mocking.

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