Commented on Zorvik · Sep 29, 2026
Hi everyone! I built Zorvik because testing APIs had started to feel like signing up for a SaaS: an account just to send a GET request, features behind a paywall, my collections synced to someone else's cloud. I wanted one fast desktop app that does all of it, for free, with my files staying mine. --------------------------------------------------------------- --------------------------------------------------------------- What's inside: - An API client for HTTP (1.1, 2 and 3), GraphQL with subscriptions, gRPC, WebSocket, Socket.IO, SSE, MQTT, TCP, UDP and DNS - MCP testing: connect to the MCP servers your AI agents use, call their tools, and set up your own MCP servers without writing code - Mock servers from your requests or an OpenAPI file, with delays and faults when you want to break things on purpose - Load tests with virtual users or a fixed request rate, ramps and pass/fail thresholds - A collection runner and a zorvik command line for CI, with JUnit reports - Your Postman collections and scripts come along (pm.*, lodash, chai, moment and more), plus OpenAPI, Swagger and cURL import - Code export in 16 languages and 170 dynamic variables for test data - Your coding agent (Claude Code, Cursor and others) can drive the whole app over MCP - A Training Bootcamp with hands-on labs if you're new to any of this --------------------------------------------------------------- --------------------------------------------------------------- The promises: every feature is free, there's no account, no cloud sync, and nothing is collected. Workspaces are plain YAML files in a folder you pick, so you share them through Git like code. It's built in Rust, runs on Windows, macOS and Linux, and it's open source (MIT or Apache-2.0). --------------------------------------------------------------- --------------------------------------------------------------- I'd love your feedback: what's the one thing your current API tool gets wrong? Tell me here or open an issue on GitHub. And if Zorvik saves you some time, a star helps a lot. --------------------------------------------------------------- --------------------------------------------------------------- Download: https://github.com/LibreGuild/zorvik/releases/latest Website: https://libreguild.github.io/zorvik/
