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.

Mock Server — Multimeter docs

Use type: server to define mock server endpoints in YAML. Open a server file in VS Code to get the mock runner on the right (YAML stays on the left). Click…Markdown (no JavaScript)# Mock Server Use `type: server` to define mock server endpoints in YAML. Open a server file in VS Code to get the **mock runner** on the right (YAML stays on the left). Click {{btn:edit:Edit Mock}} to edit endpoints and settings — see [Edit Mock](./edit.md). ![Mock runner — TLS server, configuration, and endpoints](../../screenshots/mock-server-panel.png) For the lightweight **Mock Server** sidebar panel (reflect mode, quick prototyping), see [Mock server panel](./panel.md). ## Mock runner UI ### Top bar | Control | What it does | |---|---| | `title` | Server title from `title:` (shown with the server icon) | | {{btn:edit:Edit Mock}} | Switches to **edit mode** — see [Edit Mock](./edit.md) | ### Run bar | Control | What it does | |---|---| | {{btn:play:Run mock}} | Starts the mock from this editor. While running, turns into **Stop mock** | | **More** (chevron next to Run) | **Run in mock server panel** — opens the sidebar Mock Server panel, binds this file, and starts there | | Server icon | Turns green while the mock is running | **Run mock** (UI) marks the tab dirty so closing it prompts Save / Don't Save / Cancel. Closing the tab stops that UI-started server. **Run in mock server panel** does not dirty the editor — you can close the file while the server keeps running. Stop panel-started mocks from the [Mock Server sidebar](./panel.md) (or its status-bar menu: open panel / open file). See [Panels — Status bar](../../panels/index.md#status-bar). ### Run view | Section | What you see | |---|---| | **Configuration** | Base URL, protocol, CORS, connection mode, delay | | **Endpoints** | Method, path, status, format, and tags for each endpoint | ## Supported - Multiple endpoints with routing, matching, and dynamic responses — see [Endpoints](./endpoints.md) - Echo placeholders and `e:` / `r:` / `c:` tokens — see [Tokens](./tokens.md) - HTTPS and mTLS — see [TLS](./tls.md) - Start from tests (`run` step) — see [In tests](./in-tests.md) - Start from suites (`servers:` or inline items) — see [In suites](./in-suites.md) - Top-level `import:` for JSON/YAML/CSV data — see [Data imports](../../features/data-imports.md) Sample: ```yaml type: server title: User Service Mock protocol: http port: 8081 cors: true endpoints: - method: get path: /health status: 200 body: OK - method: get path: /users/:id status: 200 format: json body: id: "${url.id}" name: Test User ``` ## Mock server elements - [Quick start](./quick-start.md) · [Edit Mock](./edit.md) · [Mock server panel](./panel.md) · [CLI](./cli.md) · [Reference](./reference.md) - [Endpoints](./endpoints.md) · [Tokens](./tokens.md) · [TLS](./tls.md) - [In tests](./in-tests.md) · [In suites](./in-suites.md) For AI agents · llms.txt · Home