---
title: "Get calendar availability"
method: GET
path: "/v1/calendars/{id}/availability"
tags: ["Availability"]
---

# Get calendar availability

`GET /v1/calendars/{id}/availability`

## Request

- Base URL: `https://api.chronary.ai`
- URL: `https://api.chronary.ai/v1/calendars/{id}/availability`
- Auth: HTTP bearer

Returns free/busy slots for a single calendar.

## Path parameters

- `id` string, required: Calendar ID

## Query parameters

- `start` string, date-time, required
- `end` string, date-time, required
- `duration` '15m' | '30m' | '45m' | '1h' | '2h'
- `slot_duration` '15m' | '30m' | '45m' | '1h' | '2h'
- `include_busy` 'true' | 'false'
- `allow_stale` 'true' | 'false'

## Response `200`

Availability slots

- CalendarAvailabilityResponse
  - `calendar_id` string, required
  - `slots` Slot[], required
    - `start` string, date-time, required
    - `end` string, date-time, required
  - `busy` object[]: Flat busy-block list. Present only when include_busy=true.
    - `start` string, date-time, required
    - `end` string, date-time, required
  - `availability_state` 'complete' | 'stale' | 'partial' | 'unavailable', required: Whether all required Chronary and authorized human-calendar data was current for this result.
  - `sources` object, required
    - `chronary` 'current', required
    - `external` 'current' | 'stale' | 'partial' | 'unavailable', required
    - `last_synced_at` string, date-time, nullable
  - `warnings` object[], required
    - `code` 'availability_incomplete', required
    - `message` string, required

## Other responses

- `400`: Validation error — invalid request body or query parameters
- `401`: Unauthorized — missing or invalid API key
- `404`: Resource not found
- `429`: Rate limited — 10 requests per second per key exceeded
- `500`: Internal server error

---

[API](https://skmtc.dev/chronary/apis/chronary-api.md) · [All operations](https://skmtc.dev/chronary/apis/chronary-api/llms.txt) · [OpenAPI document](https://skmtc.dev/chronary/apis/chronary-api/revisions/0d1a330294ae?raw)