Awesome Api Clients Overview

List of awesome API clients. Postman and Insomnia alternatives

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Awesome API Clients

Awesome Postman alternatives and Awesome Insomnia alternatives (why?).

Criteria: open-source, more than 200 stars and 2 contributors.

Restfox (repo (⭐2.6k)) - Offline-first web HTTP client
Hoppscotch (repo (⭐78k)) - Open source API development ecosystem
Firecamp (repo (⭐2.6k)) - Open Source Postman Alternative inspired by VS Code DX
gRPC UI (⭐5.8k) - An interactive web UI for gRPC, along the lines of postman
Yaade (repo (⭐2k)) - Yaade is an open-source, self-hosted, collaborative API development environment
Prestige (repo (⭐403)) - A text-based in-browser HTTP client, an interface-less Postman alternative
Requestly (repo (⭐6.4k)) - A Browser extension with API Client, API Mocking & API Interception and Modification capabilities.

Bruno (repo (⭐41k)) - Opensource IDE For Exploring and Testing APIs
Yaak (repo (⭐18k)) - The most intuitive desktop API client
API Dash (⭐2.7k) - API Dash is a beautiful open-source cross-platform API Client
ezy (repo (⭐1k)) - GUI client for gRPC/gRPC-Web
BloomRPC (⭐9k) - (unmaintained) The missing GUI Client for gRPC services
Milkman (⭐1.3k) - An Extensible Request/Response Workbench
Insomnium (⭐3.5k) - (unmaintained) Insomnium is a 100% local and privacy-focus open-source API client (based on Insomnia)
Pororoca (repo (⭐645)) - A HTTP inspection tool with support for HTTP/2 and HTTP/3, an alternative to Postman
Nightingale REST Client (repo (⭐831)) - A modern, open-source, resource-efficient REST API client for Windows
Requestly (repo (⭐6.4k)) - A desktop app with API Client, API Mocking & API Interception and Modification capabilities.
Cartero (repo (⭐948)) - A native, lightweight, multiplatform and free HTTP client
Voiden (repo (⭐596)) - Local, file-based, keyboard-first API client using executable Markdown, designed for version-controlled workflows (no sign up required)
EasyPostman (⭐580) - An open-source API debugging and performance testing tool inspired by Postman and a simplified JMeter

VS Code REST Client (repo (⭐6k)) - Send HTTP request and view the response in Visual Studio Code
restclient.el (⭐2k) - HTTP REST client tool for emacs
verb (⭐734) - Organize and send HTTP requests from Emacs
rest.nvim (⭐2k) - A fast Neovim http client written in Lua
kulala.nvim (⭐1.9k) - A minimal REST-Client Interface for Neovim.
resterm (⭐1.4k) - Terminal REST/Graphql/gRPC client written in Go.

curl (repo (⭐41k)) - Command line tool and library for transferring data with URLs (since 1998)
HTTPie (repo (⭐38k)) - HTTPie CLI: human-friendly HTTP client for the API era
grpcurl (⭐12k) - Like cURL, but for gRPC: Command-line tool for interacting with gRPC servers
xh (⭐7.6k) - Friendly and fast tool for sending HTTP requests
posting (⭐11k) - The modern API client that lives in your terminal
curlie (⭐3.6k) - The power of curl, the ease of use of httpie
HttpRepl (⭐711) - Lightweight, cross-platform command-line tool that's supported everywhere .NET Core is supported
ain (⭐622) - A HTTP API client for the terminal, uses curl, wget or httpie to make the actual calls
evans (⭐4.5k) - Evans: more expressive universal gRPC client
httpYac (repo (⭐780)) - Yet another REST client to send REST, SOAP, GraphQL and gRPC requests
ATAC (repo (⭐3.5k)) - A simple postman like API client for terminal
Better Curl Saul (⭐290) - Workspace-based HTTP client with interactive variable prompting and TOML configuration
Slumber (repo (⭐864)) - A terminal-based HTTP/REST client, with TUI and CLI usage mods

Step CI (repo (⭐1.8k)) - Open-source API Test Automation framework
Hurl (repo (⭐19k)) - Hurl, run and test HTTP requests with plain text.
Karate (repo (⭐8.8k)) - Test Automation Made Simple
Tavern (repo (⭐1.1k)) - Automated RESTful API testing
Venom (⭐1.2k) - Manage and run your integration tests with efficiency
pyresttest (⭐1.2k) - Python Rest Testing
runn (⭐613) - runn is a package/tool for running operations following a scenario
scenarigo (⭐0) - An end-to-end scenario testing tool for HTTP/gRPC server
Schemathesis (repo (⭐3.1k)) - Specification-centric API testing tool for Open API and GraphQL-based applications
Dredd (⭐4.2k) - Language-agnostic HTTP API Testing Tool
abao (⭐352) - REST API automated testing tool based on RAML
HttpRunner (repo (⭐4.3k))
k6 (repo (⭐30k)) - A modern load testing tool, using Go and JavaScript
Artillery (repo (⭐8.9k)) - Load testing at cloud-scale