Chronary iCal Feeds API

openapi: 3.2.0
info:
  title: Chronary iCal Feeds API
  version: 1.0.0
  description: 'Calendar-as-a-service API for AI agents.


    Manage calendars, events, and availability for AI and human agents.

    All endpoints require an API key passed as a Bearer token.


    **Authentication:** `Authorization: Bearer chr_sk_...` or `Authorization: Bearer chr_ak_...`


    **Rate limit:** 10 requests/second per API key. Exceeds return HTTP 429.


    **Quotas:** Monthly operation limits by plan — see Billing & plans and Rate limits.


    **Agent bootstrap:** Custom extensions prefixed `x-agent-*` describe the self-signup flow for AI agents. These are not part of any registered OpenAPI extension — they are a Chronary convention.'
  contact:
    name: Chronary Support
    email: support@chronary.ai
    url: https://docs.chronary.ai
servers:
- url: https://api.chronary.ai
  description: Production
security:
- BearerAuth: []
tags:
- name: iCal Feeds
paths:
  /ical/{ical_token}:
    get:
      operationId: getIcalFeed
      summary: Get iCal feed
      description: Returns a calendar's events in iCalendar (RFC 5545) format. No authentication required — the token in the URL acts as a capability. Responses are cached for 5 minutes and include an ETag for conditional requests.
      tags:
      - iCal Feeds
      security: []
      parameters:
      - schema:
          type: string
          description: iCal feed token from the calendar `ical_token` field
        required: true
        description: iCal feed token from the calendar `ical_token` field
        name: ical_token
        in: path
      responses:
        '200':
          description: iCalendar feed
          content:
            text/calendar:
              schema:
                type: string
        '404':
          description: Resource not found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
components:
  schemas:
    Error:
      type: object
      properties:
        error:
          type: object
          properties:
            type:
              type: string
              example: invalid_request
            message:
              type: string
              example: The field "name" is required.
            request_id:
              type: string
              example: req_01H9X4M2P5R8T6V0
            required_plan:
              type: string
              example: pro
              description: 'plan_required: the plan that unlocks the feature'
            feature:
              type: string
              description: 'plan_required: the gated feature'
            metric:
              type: string
              description: 'quota_exceeded and count caps: the metric at its limit (a PLAN_LIMITS key, accepted by POST /v1/billing/upgrade-requests)'
            limit:
              type: integer
              description: 'quota_exceeded and count caps: the plan''s limit for `metric`'
            upgrade_url:
              type: string
              description: Where a human upgrades the plan
            docs_url:
              type: string
            contact_url:
              type: string
              description: 'Contract-managed plans: where to contact sales'
            retry_after:
              type: integer
              description: Seconds until the request may be retried
          required:
          - type
          - message
          - request_id
      required:
      - error
  securitySchemes:
    BearerAuth:
      type: http
      scheme: bearer
      description: 'API key with `chr_sk_*` for org-level access or `chr_ak_*` for agent-scoped access. Pass in the Authorization header: `Authorization: Bearer chr_sk_...`'
    SessionAuth:
      type: apiKey
      in: cookie
      name: chronary_session
      description: Console session JWT (HS256), issued by sign-in and sent as the `chronary_session` cookie (a Bearer JWT is also accepted). This is NOT a chr_sk_*/chr_ak_* API key — API keys are rejected with 401 on these endpoints.
x-agent-self-signup:
  url: https://api.chronary.ai/v1/agent/sign-up
  verify_url: https://api.chronary.ai/v1/agent/verify
  restricted_key_returned: true
  human_in_the_loop: otp_email
  rate_limit: 5 requests per 60s per client IP
x-agent-bootstrap-script:
  npx: npx @chronary/agent-init@latest
  shell: https://chronary.ai/agent-init.sh
  description: One-liner that performs sign-up, prompts for OTP, verifies, and creates a smoke calendar. Accepts CHRONARY_EMAIL and CHRONARY_OTP env vars for non-interactive flows.
x-llms-txt: https://docs.chronary.ai/llms.txt
x-llms-full-txt: https://docs.chronary.ai/llms-full.txt
x-mcp-server-card: https://chronary.ai/.well-known/mcp/server-card.json
x-api-catalog: https://chronary.ai/.well-known/api-catalog