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.

WebSocket — Multimeter docs

Use protocol: ws (or a ws:// / wss:// URL) for bidirectional messaging.Markdown (no JavaScript)# WebSocket Use `protocol: ws` (or a `ws://` / `wss://` URL) for bidirectional messaging. ```yaml type: api protocol: ws url: ws://localhost:8080/ws format: json headers: X-Auth: e:token # drive messages in tests via call steps ``` Tip: For WS, use tests to send/receive frames with `call` steps that invoke this API. ## Complete example ```yaml type: api title: Notifications stream protocol: ws url: wss://example.com/ws format: json headers: X-Auth: e:token # Drive messages in a test using steps ``` Tip: drive frames from [test `call` steps](../../test/steps/call.md). See also: [Connections panel](../../../panels/connections.md) · [API tester](../../index.md) For AI agents · llms.txt · Home