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.

var, const, let — Multimeter docs

Create or change variables for later steps. set mutates existing values (or creates new ones); var / const / let follow JavaScript scoping.Markdown (no JavaScript)# var, const, let Create or change variables for later steps. `set` mutates existing values (or creates new ones); `var` / `const` / `let` follow JavaScript scoping. ```yaml - set: token: ${doLogin.token} # mutable o:token: ${doLogin.token} # writes outputs.token o:user.name: "alice" # nested outputs field - var: attempt: 1 - const: role: "admin" - let: note: "temp" ``` Use `o:name` (or nested `o:user.name`) as a **`set` key** to assign the test’s `outputs` object. Read the same fields anywhere with `o:name`, `<<o:name>>`, or `${outputs.name}` — see [Dynamic values](../../../features/dynamic-values/index.md). When to use which: | Step | Behavior | |------|----------| | `set` | Creates or updates a variable in the current scope (mutable). Use for values that change across steps. | | `var` | Function-scoped variable (hoisted). Rarely needed; prefer `let`. | | `const` | Block-scoped, cannot be reassigned. Use for values that should not change. | | `let` | Block-scoped, can be reassigned. Use for loop counters or temporary values. | For log messages, use [print](./print.md). For environment variables at runtime, use [setenv](./setenv.md). --- See also: [print](./print.md) · [setenv](./setenv.md) · [js](./js.md) · [for](./for.md) · [Dynamic values](../../../features/dynamic-values/index.md) For AI agents · llms.txt · Home