# POST /api/v1/inboxes/:id/rules/test

Auth: Bearer

HTML: https://cooperemail.com/docs/reference/test-rule

## Summary

Dry run. Body is {message_id} for stored enabled rules, or a rule body plus message_id for one unsaved rule. Returns matching rules, actions that would run, and skipped actions with reasons. No side effects. Read permission is message_read.

## Request

```json
{
  "message_id": "msg_example"
}
```

## Response

The OpenAPI document does not declare a JSON response schema for this call. The summary is the contract.

## Errors

The summary and the OpenAPI operation do not name an error code.

## Idempotency

This route does not document Idempotency-Key or client_id.