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.

Use environments — Multimeter docs

Keep base URLs and secrets out of request files. Define variables in a type: env file (often multimeter.mmt at the project root), then reference them with…Markdown (no JavaScript)# Use environments Keep base URLs and secrets out of request files. Define variables in a `type: env` file (often `multimeter.mmt` at the project root), then reference them with `e:name` or `<<e:name>>`. ## Minimal example `multimeter.mmt`: ```yaml type: env variables: api_url: - https://test.mmt.dev ``` API `file:` ```yaml type: api url: <<e:api_url>>/json method: get format: json ``` Select the environment / preset in the Environment panel (or pass `--preset` / `-e` on the CLI). ## Tips - Place `multimeter.mmt` at the project root so `+/` imports resolve correctly. - Use presets to switch local / staging / production in one click when several **independent** variables must move together. - Fields that must stay together for **API defaults** (e.g. latitude + longitude) belong in **one** nested choice (`city.berlin: {latitude, longitude}`), then API `e:city.latitude` — not two maps a preset tries to keep in sync. - For env vs JSON vs values written in the test, see [Where values live](./start-a-project.md#where-values-live-env-vs-json-vs-direct). - Never commit real secrets — use empty defaults and override in CI. ## Learn more - [Environment files](../files/env/index.md) - [Live variables](../files/env/live-variables.md) — `./….mmt` values that run another file on each read - Example: [Environment Variables](/docs/examples/basic/03_environment_variables) For AI agents · llms.txt · Home