Awesome API Clients
Awesome Postman alternatives and Awesome Insomnia alternatives (why?).
Criteria: open-source, more than 200 stars and 2 contributors.
If you wish to contribute: start a pull request
Web-Based
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Restfox (repo) - Offline-first web HTTP client
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Hoppscotch (repo) - Open source API development ecosystem
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Firecamp (repo) - Open Source Postman Alternative inspired by VS Code DX
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RecipeUI (repo) - RecipeUI is the Postman alternative with type safety built in
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gRPC UI - An interactive web UI for gRPC, along the lines of postman
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Yaade (repo) - Yaade is an open-source, self-hosted, collaborative API development environment
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Prestige (repo) - A text-based in-browser HTTP client, an interface-less Postman alternative
Desktop
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Bruno (repo) - Opensource IDE For Exploring and Testing APIs
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Yaak (repo) - The most intuitive desktop API client
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API Dash - API Dash is a beautiful open-source cross-platform API Client
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ezy (repo) - GUI client for gRPC/gRPC-Web
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BloomRPC - (unmaintained) The missing GUI Client for gRPC services
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Milkman - An Extensible Request/Response Workbench
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Insomnium - (unmaintained) Insomnium is a 100% local and privacy-focus open-source API client (based on Insomnia)
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Pororoca (repo) - A HTTP inspection tool with support for HTTP/2 and HTTP/3, an alternative to Postman
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Nightingale REST Client (repo) - A modern, open-source, resource-efficient REST API client for Windows
IDE
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VS Code REST Client (repo) - Send HTTP request and view the response in Visual Studio Code
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RESTClient - A Firefox debugger for RESTful web services
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restclient.el - HTTP REST client tool for emacs
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verb - Organize and send HTTP requests from Emacs
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rest.nvim - A fast Neovim http client written in Lua
CLI
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curl (repo) - Command line tool and library for transferring data with URLs (since 1998)
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HTTPie (repo) - HTTPie CLI: human-friendly HTTP client for the API era
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grpcurl - Like cURL, but for gRPC: Command-line tool for interacting with gRPC servers
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xh - Friendly and fast tool for sending HTTP requests
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posting - The modern API client that lives in your terminal
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curlie - The power of curl, the ease of use of httpie
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HttpRepl - Lightweight, cross-platform command-line tool that's supported everywhere .NET Core is supported
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ain - A HTTP API client for the terminal, uses curl, wget or httpie to make the actual calls
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evans - Evans: more expressive universal gRPC client
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httpYac (repo) - Yet another REST client to send REST, SOAP, GraphQL and gRPC requests
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ATAC (repo) - A simple postman like API client for terminal
Automated Testing
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Step CI (repo) - Open-source API Test Automation framework
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Hurl (repo) - Hurl, run and test HTTP requests with plain text.
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Karate (repo) - Test Automation Made Simple
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Tavern (repo) - Automated RESTful API testing
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Venom - Manage and run your integration tests with efficiency
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pyresttest - Python Rest Testing
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runn - runn is a package/tool for running operations following a scenario
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scenarigo - An end-to-end scenario testing tool for HTTP/gRPC server
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Schemathesis (repo) - Specification-centric API testing tool for Open API and GraphQL-based applications
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Dredd - Language-agnostic HTTP API Testing Tool
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abao - REST API automated testing tool based on RAML
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HttpRunner (repo)
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k6 (repo) - A modern load testing tool, using Go and JavaScript
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Artillery (repo) - Load testing at cloud-scale