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.

Edit Environment — Multimeter docs

Open an environment file (type: env) in VS Code and click in the panel top bar to switch to edit mode. Use the back control to return to the runner view.Markdown (no JavaScript)# Edit Environment Open an environment file (`type: env`) in VS Code and click {{btn:edit:Edit Environment}} in the panel top bar to switch to **edit mode**. Use the back control to return to the runner view. On the runner view, {{btn:check:Apply}} merges this file’s variables into the workspace Environment panel (without wiping other keys). {{btn:clear-all:Clear}} removes only the keys defined in this file. See [Environment overview](./index.md). For workspace runtime variables and presets in the Multimeter bottom panel, see [Environment variables panel](./ui.md). ## Tabs | Tab | What you edit | |---|---| | {{btn:note:Overview}} | Top-level `import` map (JSON/YAML/CSV data files) | | {{btn:symbol-variable:Variables}} | Variable definitions — choice maps or allowed-value lists | | {{btn:tasklist:Presets}} | Preset groups that bind variables to choices | | {{btn:settings-gear:Settings}} | HTTP defaults (`setting.http.version`, `setting.http.timeout`, …) | | {{btn:shield:Certificates}} | Client certificate configuration for mTLS | ### Variables Each variable is either: - A **key-value map** (named choices) — each choice may be a scalar or a nested object/array; presets (or the panel dropdown) select a key. Nested values are edited as JSON in the value field (e.g. `{"latitude":52.52,"longitude":13.41}`). - An **array list** (allowed values, scalars only) — presets or the runner pick from the list ### Presets Build hierarchical preset groups. A common pattern is `runner.dev` and `runner.prod` under a `runner` group. See [Overview — Define an environment file](./index.md#define-an-environment-file). ### Settings Configure default HTTP behavior applied when this environment is active. See [Settings](./settings.md). ### Certificates Attach client certificates for mutual TLS. See [Certificates](../../features/certificates/index.md). ## Promote values during API runs In API definitions, use `setenv` to capture response values for later `steps:` ```yaml setenv: token: body[token] ``` Values use the same extraction expressions as `outputs`. See [setenv](../api/setenv.md). --- See also: [Environment overview](./index.md) · [Environment variables panel](./ui.md) · [CLI](./cli.md) · [Project root](./project-root.md) · [Reference](./reference.md) For AI agents · llms.txt · Home