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.

Spec editor — Multimeter docs

When you Run directly — Open as MMT on a Postman collection, OpenAPI spec, WSDL, .http file, or Bruno request/collection — Multimeter opens a split spec…Markdown (no JavaScript)# Spec editor (Open as MMT) When you **Run directly** — **Open as MMT** on a Postman collection, OpenAPI spec, WSDL, `.http` file, or Bruno request/collection — Multimeter opens a **split spec editor**: the source stays on the left; the right pane is for picking what to run and sending or running it. Sends and runs do not edit the source file. ## Request picker Click {{btn:list-tree}} in the header (**All** / test view) or next to the method dropdown (**API** view) to open the **request picker**. | Menu row | Label | Right pane | Primary action | |---|---|---|---| | **All** | `TEST` | Test runner ({{btn:beaker}} title chip) | **Run** every request in order as one sequential test | | Operation / request | `GET`, `POST`, `PUT`, … | API tester | {{btn:send:Send}} that single request | | Named example | {{btn:lightbulb}} + example name | API tester | {{btn:send:Send}} with that example's inputs | **All** appears only for **HTTP** (`.http`, `.rest`, `.https`) and **Bruno** (single `.bru` or `bruno.json` collection). **OpenAPI**, **Postman**, and **WSDL** list operations only (plus named examples when the spec defines them). There is no **All** row. Choosing a different row switches between the API tester and the test runner — you do not use a separate API/test toggle. ### Save as MMT Hover a picker row and click {{btn:save-as}} to write a new `.mmt` file: | Selection | Generated file | |---|---| | **All** | One `type: test` with a `call` step per request | | Operation / request | One `type: api` | | Named example | One `type: api` with that example in `examples` | ## Format-specific guides - [OpenAPI](./openapi.md) · [Postman](./postman.md) · [WSDL](./wsdl.md) - [HTTP file](./http-file.md) · [Bruno](./bruno.md) Convert the whole source to a project tree with **Convert to MMT...** in the Explorer (separate from the picker). For AI agents · llms.txt · Home