Open-source alternatives to Postman

Open-source IDE for exploring and testing APIs — Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)

↔ alternative to Postman

Cross-platform API client for REST and GraphQL — The open-source, cross-platform API client for GraphQL, REST, WebSockets, SSE and gRPC. With Cloud, Local and Git storage.

↔ alternative to Postman

User-friendly command-line HTTP client — 🥧 HTTPie CLI — modern, user-friendly command-line HTTP client for the API era. JSON support, colors, sessions, downloads, plugins & more.

↔ alternative to Postman

Run and test HTTP requests from plain text — Hurl, run and test HTTP requests with plain text.

↔ alternative to Postman

Desktop client for REST, GraphQL, WebSocket, gRPC — The most intuitive desktop API client. Organize and execute REST, GraphQL, WebSockets, Server Sent Events, and gRPC 🦬

↔ alternative to Postman

Fast, configurable web crawling and spidering tool — A next-generation crawling and spidering framework.

↔ alternative to Postman

Kubernetes security scanning and compliance tool — Kubescape is an open-source Kubernetes security platform for your IDE, CI/CD pipelines, and clusters. It includes risk analysis, security, compliance, and misconfiguration scanning, saving Kubernetes users and administrators precious time, effort, and resources.

↔ alternative to Jira、Postman

CLI toolchain for Protocol Buffers APIs — The best way of working with Protocol Buffers.

↔ alternative to Postman

GraphQL code generator for schemas and operations — A tool for generating code based on a GraphQL schema and GraphQL operations (query/mutation/subscription), with flexible support for custom plugins.

↔ alternative to Postman

Interactive HTTP inspection tool — Interactive cli tool for HTTP inspection

↔ alternative to Postman

GraphQL IDE for queries, docs and subscriptions — 🎮 GraphQL IDE for better development workflows (GraphQL Subscriptions, interactive docs & collaboration)

↔ alternative to Postman

Design and run mock APIs locally — Mockoon is the easiest and quickest way to run mock APIs locally. No remote deployment, no account required, open source.

↔ alternative to Postman

Cyber Security ALL-IN-ONE Platform — Cyber Security ALL-IN-ONE Platform

↔ alternative to Postman、Zapier

Remote phone debug and packet capture — 微信调试，各种WebView样式调试、手机浏览器的页面真机调试。便捷的远程调试手机页面、抓包工具，支持：HTTP/HTTPS，无需USB连接设备。

↔ alternative to Postman

MySQL and MariaDB database management for macOS — MySQL/MariaDB database management for macOS

↔ alternative to Postman

VPS server performance benchmarking and testing tool — VPS 融合怪服务器测评项目 更推荐使用无环境依赖的Go版本 VPS Fusion Monster Server Test Script – More recommended to use the Go version with no environment dependencies: https://github.com/oneclickvirt/ecs

↔ alternative to Notion、Figma、Postman

Privacy-first Postman alternative — Community hub for Requestly API Client — bugs, feature requests, and roadmap. The privacy-first Postman alternative.

↔ alternative to Postman

Fast and reliable port scanner — A fast port scanner written in go with a focus on reliability and simplicity. Designed to be used in combination with other tools for attack surface discovery in bug bounties and pentests

↔ alternative to Postman

Browser UI to explore and call gRPC APIs — An interactive web UI for gRPC, along the lines of postman

↔ alternative to Postman

Pluggable linter for Terraform infrastructure code — A Pluggable Terraform Linter

↔ alternative to Postman

Cloud-native Kubernetes API and AI gateway — The Cloud-Native API Gateway and AI Gateway

↔ alternative to Postman、Zapier

Feature-rich GraphQL client IDE — ✨⚡️ A feature-rich GraphQL Client for all platforms.

↔ alternative to Postman、GraphiQL

Out-of-band interaction detection tool — An OOB interaction gathering server and client library

↔ alternative to Postman

Web screenshot utility with report viewer — 🔍 gowitness - a golang, web screenshot utility using Chrome Headless

↔ alternative to Postman、Docker

Cross-platform API testing client for REST, GraphQL, and HTTP. — 🚀 HTTPie Desktop — cross-platform API testing client for humans. Painlessly test REST, GraphQL, and HTTP APIs.

↔ alternative to Postman、Insomnia、Hoppscotch

Terminal Postman-like API client — A simple API client (postman like) in your terminal

↔ alternative to Postman

AI-powered cross-platform API client — API Dash is a beautiful AI-powered open-source cross-platform (Desktop & Mobile) API Client built using Flutter which can help you easily create & customize your HTTP & GraphQL API requests, visually inspect responses and generate API integration code. A lightweight alternative to postman/insomnia.

↔ alternative to Postman、Bruno

Offline HTTP and socket API testing client — Offline-First Minimalistic HTTP & Socket Testing Client for the Web & Desktop

↔ alternative to Postman、Insomnia

Android client for Jellyfin media server — Android Client for Jellyfin

↔ alternative to Notion、Figma、Postman

Open source API dev tool — Developer-first OpenSource API DevTool, Postman/Insomnia alternative.

↔ alternative to Postman、Insomnia

Next-gen API testing and development tool — Your next-gen API testing and development tool.

↔ alternative to Postman、Apidog

Self-hosted blind XSS vulnerability hunter — An easy-to-setup version of XSS Hunter. Sets up in five minutes and requires no maintenance!

↔ alternative to Postman

Douyu-style live streaming Flutter client — DY :rocket: Flutter 礼物特效、手势动画、弹幕池、抽奖、鱼吧

↔ alternative to Notion、Figma、Postman

HTTP/GraphQL client for Neovim — A fully-featured ⚡️ HTTP/GraphQL/gRPC/Websocket-client 🐼 interface 🖥️ for Neovim ❤️, that supports the Jetbrains .http spec (with full scripting support).

↔ alternative to Postman

Command-line tool usage examples — Useful examples at the command line.

↔ alternative to Postman

Terminal API client for HTTP, GraphQL and gRPC — Terminal API client for HTTP, GraphQL and gRPC. Plain .http files you can diff and version, with workflows, mocks, profiling, tracing, OpenAPI import, SSH tunnels, Kubernetes port-forwards, WebSocket, SSE and a CLI runner.

↔ alternative to Postman

YAML-configured REST API tests for CI pipelines — ⚡️ CI-ready tests for REST APIs configured in YAML

↔ alternative to Postman

Cross-platform functional testing tool for APIs — SoapUI is a free and open source cross-platform functional testing solution for APIs and web services.

↔ alternative to Postman

Design, test and document APIs in plain Markdown — Design, Test and Document APIs in plain Markdown. Compose Requests with API blocks. Reuse, Replace & Version everything just like code. Offline, Truly Git Native, No Lock-in.

↔ alternative to Postman

GUI and CLI tool for testing REST APIs — Tool to test HTTP/RESTful webservices.

↔ alternative to Postman

Visual editor for OpenAPI and Swagger definitions — GUI / visual editor for creating and editing OpenAPI / Swagger definitions

↔ alternative to Stoplight、Postman

Desktop client for testing and debugging REST APIs — Advanced REST Client - Desktop application

↔ alternative to Postman

Extensible request/response workbench — An Extensible Request/Response Workbench

↔ alternative to Postman

Discover, test, and share APIs like Postman — Discover, test, and share APIs in seconds

↔ alternative to Postman

TUI to browse and run OpenAPI APIs — Terminal UI to list, browse and run APIs defined with openapi spec.

↔ alternative to Postman

Lightweight local Postman alternative for API testing — Privacy-first API platform built with Tauri v2. No login, no cloud, ~60 MB RAM. A lightweight Postman alternative.

↔ alternative to Postman

Terminal-based HTTP/REST client — Terminal-based HTTP/REST client

↔ alternative to Postman

GraphQL IDE for API exploration — ⚡️ GraphQL IDE - An extensive IDE for exploring GraphQL API's

↔ alternative to Postman

REST client — A beautiful, cross-platform REST client.

↔ alternative to Postman、Insomnia、Paw