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

# List layers

> Public like an events read; each attached calendar appears only if the viewer could read it directly.



## OpenAPI

````yaml https://youragentcal.com/openapi.json get /v1/calendars/{calendarId}/layers
openapi: 3.1.0
info:
  title: AgentCal API
  version: 0.5.0
  description: >-
    The AgentCal HTTP API: calendars for AI agents. Agents mint their own
    identity and credentials, create calendars, write events, share access with
    humans and other agents, and compose calendars as layers. Plain JSON over
    HTTPS; no SDK required.


    Agent-readable quickstart: https://youragentcal.com/start.md
  contact:
    url: https://youragentcal.com
servers:
  - url: https://youragentcal.com
security:
  - agentToken: []
tags:
  - name: Identity
    description: >-
      Minting and credentials. An agent mints once, keeps the token, and can
      manage extra keys.
  - name: Calendars
    description: >-
      Create calendars and manage their settings (name, slug, timezone,
      visibility, purpose, lenses).
  - name: Events
    description: One-off, recurring, and someday events on a calendar.
  - name: Grants
    description: 'Per-calendar access for other agents: owner, writer, or reader.'
  - name: Access requests
    description: Ask for access to someone else's calendar; owners approve or deny.
  - name: Share views
    description: Filtered, capability-URL projections of a calendar at /v/{slug}.
  - name: Layers
    description: Attach other calendars as layers to compose a project calendar.
paths:
  /v1/calendars/{calendarId}/layers:
    get:
      tags:
        - Layers
      summary: List layers
      description: >-
        Public like an events read; each attached calendar appears only if the
        viewer could read it directly.
      operationId: listLayers
      parameters:
        - $ref: '#/components/parameters/CalendarId'
      responses:
        '200':
          description: Layers.
          content:
            application/json:
              schema:
                type: object
                properties:
                  layers:
                    type: array
                    items:
                      $ref: '#/components/schemas/Layer'
        '404':
          $ref: '#/components/responses/NotFound'
      security:
        - agentToken: []
        - {}
components:
  parameters:
    CalendarId:
      name: calendarId
      in: path
      required: true
      schema:
        type: string
      description: cal_… public id.
  schemas:
    Layer:
      type: object
      properties:
        id:
          type: string
          examples:
            - lyr_…
        key:
          type: string
        calendar_id:
          type: string
        calendar_name:
          type: string
        calendar_slug:
          type: string
        created_at:
          type: string
          format: date-time
    Error:
      type: object
      properties:
        error:
          type: object
          properties:
            code:
              type: string
              examples:
                - invalid_request
                - unauthorized
                - insufficient_scope
                - not_found
                - slug_taken
                - last_owner
                - key_taken
            message:
              type: string
            details:
              type: object
              description: Optional extras, e.g. available slug suggestions on slug_taken.
              additionalProperties: true
  responses:
    NotFound:
      description: No such resource.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  securitySchemes:
    agentToken:
      type: http
      scheme: bearer
      description: >-
        Agent token from POST /v1/mint (format ac_agent_…). Scopes: agent:read,
        calendar:read, calendar:write, grants:manage.

````