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

# The app's rules, by sessions

> For every rule:<id> trigger that fired in at least one of the app's sessions that started in the range (default: the last 14 UTC days): how many sessions and when the newest started, the most first. A rule absent from the list fired in none. One rule's days and outcomes: /rules/{ruleId}/stats.



## OpenAPI

````yaml /api-reference/openapi.json get /projects/{projectId}/rules/stats
openapi: 3.1.0
info:
  title: Apsio API
  version: 0.1.0
  description: >-
    Read API v0: your projects, release health and comparisons, missing symbols,
    issues, sessions, vitals, cohort comparisons, performance (app start,
    screens, hangs, MetricKit) and network endpoints and traces for one project.
    Authenticate with a project token as a bearer token, with an OAuth access
    token from Apsio's authorization server (MCP clients), or, from the console,
    with the session cookie of a member of the project's organization.
servers:
  - url: https://api.apsio.io/v1
security: []
paths:
  /projects/{projectId}/rules/stats:
    get:
      summary: The app's rules, by sessions
      description: >-
        For every rule:<id> trigger that fired in at least one of the app's
        sessions that started in the range (default: the last 14 UTC days): how
        many sessions and when the newest started, the most first. A rule absent
        from the list fired in none. One rule's days and outcomes:
        /rules/{ruleId}/stats.
      parameters:
        - schema:
            type: string
            pattern: ^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$
            example: 0192f3a4-0000-7000-8000-00000000a101
          required: true
          name: projectId
          in: path
        - schema:
            type: string
            format: date-time
            description: >-
              Start of the time range, inclusive (RFC 3339). Defaults to the
              range end minus the default length.
            example: '2026-10-01T00:00:00Z'
          required: false
          description: >-
            Start of the time range, inclusive (RFC 3339). Defaults to the range
            end minus the default length.
          name: from
          in: query
        - schema:
            type: string
            format: date-time
            description: End of the time range, exclusive (RFC 3339). Defaults to now.
            example: '2026-10-08T00:00:00Z'
          required: false
          description: End of the time range, exclusive (RFC 3339). Defaults to now.
          name: to
          in: query
        - schema:
            type: string
            pattern: ^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$
            description: >-
              The app whose policy defines the rules: the same id in two apps is
              two rules.
          required: true
          description: >-
            The app whose policy defines the rules: the same id in two apps is
            two rules.
          name: app_id
          in: query
      responses:
        '200':
          description: The app's rules that fired.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/RuleStatsList'
        '400':
          description: The request is not valid.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '401':
          description: No valid bearer token or console session.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '403':
          description: The credentials cannot read this project.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '410':
          description: >-
            The project or its organization is being deleted (`erasing`):
            nothing more to read; do not retry.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '429':
          description: >-
            Over a rate limit (the caller's, the client address's, or the
            plan's); Retry-After says when to retry.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
      security:
        - bearer: []
        - session: []
components:
  schemas:
    RuleStatsList:
      type: object
      properties:
        rules:
          type: array
          items:
            type: object
            properties:
              trigger:
                type: string
                example: rule:checkout-5xx
              sessions:
                type: integer
              last_at:
                type:
                  - string
                  - 'null'
                description: >-
                  When the newest session in the range in which the rule fired
                  started; null when it fired in none.
            required:
              - trigger
              - sessions
              - last_at
        retention_days:
          type: integer
          description: >-
            How many days of crashes and release health the project's plan keeps
            (D94). Nothing older is returned, whatever the time range.
          example: 90
      required:
        - rules
        - retention_days
    Error:
      type: object
      properties:
        error:
          type: object
          properties:
            code:
              type: string
              example: invalid_request
            message:
              type: string
            subject:
              type: string
              enum:
                - organization
                - project
              description: >-
                With `erasing` (410) only: what is being deleted, the
                organization or the project.
          required:
            - code
            - message
      required:
        - error
  securitySchemes:
    bearer:
      type: http
      scheme: bearer
      description: >-
        A project token (apsio_pt_v0...), which reads exactly one project, or an
        OAuth access token issued for the API, which reads what its user can.
        Access tokens issued for Apsio's MCP server are accepted only from the
        MCP server itself.
    session:
      type: apiKey
      in: cookie
      name: apsio_session
      description: >-
        The console session, set by /v1/auth/callback (`__Host-apsio_session`
        when host-only).

````

This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.