Multimeter is a Git-native REST client and API testing tool for VS Code. Requests, tests, mocks, and docs are YAML .mmt files in Git — the same files in the visual editor and in CI via testlight. Apache 2.0. No account.

How do I use Multimeter with Cursor, Copilot, or Claude?

Install the VS Code/Cursor extension or add MCP with npx -y mmt-mcp. Agents should call scaffold_test, validate, format, and run instead of guessing .mmt syntax.

Yes. Apache License 2.0. No account required.

Quick start — Multimeter docs

Minimal HTTP GET against the public test server:Markdown (no JavaScript)# API quick start Minimal HTTP GET against the public test `server:` ```yaml type: api title: Get sample JSON url: https://test.mmt.dev/json method: get format: json ``` Open the file in VS Code and click {{btn:send:Send}}. The Response panel shows status, headers, and body. - `format` encodes/decodes the body (default `json`) — see [Format](./body/format.md) - Protocol is inferred from the URL (`ws://` → WebSocket, otherwise HTTP) For POST with a JSON body, add `body`: ```yaml type: api title: Echo JSON url: https://test.mmt.dev/echo method: post format: json body: message: hello world ``` The echo server returns your payload in the response — useful for checking what was sent. More: [Body](./body/index.md) · [HTTP](./protocols/http.md) · [HTTP bodies](./protocols/http-bodies.md) · [WebSocket](./protocols/websocket.md) · [GraphQL](./protocols/graphql.md) · [gRPC](./protocols/grpc.md) For AI agents · llms.txt · Home