> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mangrovesystems.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Get a rule's stats

> Aggregate counts for a rule version, so you can size its effect without paging through every result.

A substitute rule also returns `action`, `corrected` and `measured`. On those rules `alerted` and `passed` carry the same counts as `corrected` and `measured` under their older names.



## OpenAPI

````yaml GET /projects/{project_id}/rules/{rule_id}/stats
openapi: 3.1.0
info:
  title: Mangrove - API
  version: 1.1.0
servers:
  - url: https://app.gomangrove.com/api/v1
security:
  - sec0: []
paths:
  /projects/{project_id}/rules/{rule_id}/stats:
    get:
      summary: Get a rule's stats
      description: >-
        Aggregate counts for a rule version, so you can size its effect without
        paging through every result.


        A substitute rule also returns `action`, `corrected` and `measured`. On
        those rules `alerted` and `passed` carry the same counts as `corrected`
        and `measured` under their older names.
      operationId: get-project-rule-stats
      parameters:
        - name: project_id
          in: path
          schema:
            type: string
          required: true
        - name: rule_id
          in: path
          schema:
            type: string
          required: true
        - name: version
          in: query
          schema:
            type: integer
      responses:
        '200':
          description: '200'
          content:
            application/json:
              examples:
                Alert rule:
                  value:
                    evaluated: 15
                    passed: 14
                    alerted: 1
                    dismissed: 0
                    last_evaluated_at: '2026-08-14T23:01:46.637Z'
                    target:
                      name: Ambient Conditions
                      references:
                        - ambient-temperature-c
                    action: alert
                Substitute rule:
                  value:
                    evaluated: 220
                    passed: 198
                    alerted: 22
                    dismissed: 0
                    corrected: 22
                    measured: 198
                    last_evaluated_at: '2026-08-14T23:01:46.637Z'
                    target:
                      name: Ambient Conditions
                      references:
                        - ambient-temperature-c
                    action: substitute
              schema:
                type: object
                properties:
                  evaluated:
                    type: integer
                  passed:
                    type: integer
                  alerted:
                    type: integer
                  dismissed:
                    type: integer
                  corrected:
                    type: integer
                    description: Substitute rules only.
                  measured:
                    type: integer
                    description: Substitute rules only.
                  last_evaluated_at:
                    type: string
                    format: date-time
                    nullable: true
                  action:
                    type: string
                    enum:
                      - alert
                      - substitute
                  target:
                    type: object
                    properties:
                      name:
                        type: string
                      references:
                        type: array
                        items:
                          type: string
      deprecated: false
components:
  securitySchemes:
    sec0:
      type: apiKey
      in: header
      name: Authorization
      x-bearer-format: ''

````