Postmate ClientFast, Privacy-First API Testing Inside VS Code

A fast, lightweight REST API client built natively into Visual Studio Code. No browser tabs, no context switching — just you and your APIs.

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Native VS Code API Client

A fully native REST API client inside your editor. No Electron wrapper, no external runtime. Instant startup, zero overhead.

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Tests & Assertions

Write tests in plain English with the tabular test editor, or use the full pm scripting library for advanced assertions.

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Environments & Variables

Manage dev, staging, and production configs with named environments. Reference values anywhere with {{variableName}}.

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Collections & Folders

Organise requests into collections and nested folders. Share, export, and version-control your entire API suite.

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Data-Driven API Testing

Attach CSV-style data tables to requests and run data-driven API tests using the built-in Collection Runner.

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API Testing in CI/CD (CLI)

Run collections from the command line, automate API tests, and generate HTML reports for CI/CD pipelines.

Postmate Client is a Postman alternative for Visual Studio Code designed for developers who want fast, local, and privacy-first API testing without cloud sync or login.

Why Postmate Client?

✅ Privacy-first API testing (no cloud sync, no login)
✅ Built natively for Visual Studio Code
✅ Fast and lightweight (no heavy desktop apps)
✅ Full support for collections, environments, and variables
✅ Powerful data-driven testing with CSV support