Admin Timeslot Management

Create, update, repeat, and enrich fixed slots in the admin API. This guide is grounded in the current backend JSON:API contracts and the admin frontend workflows used by the timeslot detail editor. For general conventions, see JSON-API Conventions. For booking lifecycle effects after a timeslot change, see Booking Lifecycle.

What a Timeslot Represents

A timeslot is a fixed start and end period attached to a resource or service. It can:

exist as a one-off slot
belong to one or more timeslot series
expose cached resource_info for cards and customer-facing summaries
use dynamic capacity based on resource allocations
have regular bookings linked to it

Core schema references:

reference/timeslots.v1.yaml
reference/timeslot-series.v1.yaml
reference/timeslot-resource-allocations.v1.yaml

Main endpoints:

GET /api/v1/timeslots
POST /api/v1/timeslots
GET /api/v1/timeslots/{timeslot_id}
PATCH /api/v1/timeslots/{timeslot_id}
DELETE /api/v1/timeslots/{timeslot_id}
POST /api/v1/timeslots/preview
POST /api/v1/timeslots/{timeslot_id}/extend

List and Filter Timeslots

Use the collection endpoint for admin calendar and editor views:

GET /api/v1/timeslots?filter[start_date]=2026-06-01T00:00:00Z&filter[end_date]=2026-06-30T23:59:59Z&filter[r]=12&include=resource,series,resource_allocations.resource,model_syncs

Confirmed query parameters:

Parameter	Description
`include`	`resource`, `resource.parent`, `service`, `series`, `cover_image`, `resource_allocations`, `resource_allocations.resource`, `resource_allocations.resource.category`, `resource_allocations.resource.cover_image`, `model_syncs`
`sort`	`period`, `start_date`, `end_date`, `created_at`
`filter[start_date]`	Return slots ending after this timestamp
`filter[end_date]`	Return slots starting before this timestamp
`filter[upcoming_only]`	Restrict to future slots
`filter[past_only]`	Restrict to past slots
`filter[resources]`	Filter by resource IDs
`filter[r]`	Alias used by the admin calendar
`filter[resource_groups]`	Filter by resource groups
`filter[dynamic_capacity]`	Restrict to dynamic-capacity slots

Resource-scoped reads are also available:

GET /api/v1/resources/{resource_id}/timeslots
GET /api/v1/resources/{resource_id}/timeslot-series

Create a Single Timeslot

POST /api/v1/timeslots
Content-Type: application/vnd.api+json

{
  "data": {
    "type": "timeslots",
    "attributes": {
      "title": "Session 1",
      "title_i18n": {
        "en-us": "Session 1"
      },
      "start_date": "2026-06-08T10:00:00+02:00",
      "end_date": "2026-06-08T11:00:00+02:00",
      "dynamic_capacity": true,
      "base_quota": 0,
      "max_dynamic_quota": 5,
      "min_bookings_count": 2,
      "cancellation_offset_value": 24
    },
    "relationships": {
      "resource": {
        "data": {
          "id": "12",
          "type": "resources"
        }
      },
      "series": {
        "data": [
          {
            "id": "3",
            "type": "timeslot-series"
          }
        ]
      }
    }
  }
}

Common attributes used by the admin UI:

Attribute	Notes
`title`, `title_i18n`	Short display labels
`description`, `description_i18n`	Optional content
`start_date`, `end_date`, `timezone`	Period and editing timezone
`quota`	Effective quota for non-dynamic slots
`dynamic_capacity`	Enables allocation-driven quota
`base_quota`	Static base capacity
`max_dynamic_quota`	Upper quota cap
`min_bookings_count`	Minimum accepted bookings before the slot is confirmed
`cancellation_offset_type`, `cancellation_offset_value`	Automatic cancellation rules

Preview and Create Recurring Slots

The admin frontend does not blindly create recurring slots. It first previews generated occurrences, then saves one seed timeslot, then extends from that seed. Preview request:

POST /api/v1/timeslots/preview
Content-Type: application/json

{
  "start_date": "2026-06-08T10:00:00+02:00",
  "end_date": "2026-06-08T11:00:00+02:00",
  "resource_id": "12",
  "timezone": "Europe/Berlin",
  "recurring": {
    "frequency": "weekly",
    "interval": 1,
    "days": [1],
    "count": 4
  }
}

Extend request:

POST /api/v1/timeslots/{timeslot_id}/extend
Content-Type: application/json

Use the same recurring payload after the first timeslot has been created. The response returns the generated occurrences. Use series when you need a named grouping for recurring slots. CRUD is available on:

GET /api/v1/timeslot-series
POST /api/v1/timeslot-series
GET /api/v1/timeslot-series/{timeslot_series_id}
PATCH /api/v1/timeslot-series/{timeslot_series_id}
DELETE /api/v1/timeslot-series/{timeslot_series_id}

Manage Resource Allocations

Dynamic-capacity timeslots can attach secondary resources through timeslot resource allocations. Endpoints:

GET /api/v1/timeslot-resource-allocations
POST /api/v1/timeslot-resource-allocations
GET /api/v1/timeslot-resource-allocations/{timeslot_resource_allocation_id}
PATCH /api/v1/timeslot-resource-allocations/{timeslot_resource_allocation_id}
DELETE /api/v1/timeslot-resource-allocations/{timeslot_resource_allocation_id}

Useful fields:

Field	Notes
`status`	`provisioned` or `pending`
`capacity_multiplier`	Capacity contribution; `0` makes the allocation a required gate
`is_required`	Required resource gate for the slot
`is_externally_blocked`	Indicates external blockers during the slot period
`visible_to_customer`	Controls whether the resource appears in cached `resource_info`
`provisioned_at`	Timestamp when pending capacity became provisioned
`provisioned_by_booking_id`	Booking that triggered provisioning

List filters include filter[is_required] in addition to status and visibility filters.

Reschedule or Update a Timeslot With Bookings

Updating a slot can affect linked regular bookings. When the period changes, the admin frontend sends extra query parameters on PATCH /api/v1/timeslots/{timeslot_id}.

Query parameter	Purpose
`sync_bookings=1`	Move exact-period regular bookings with the timeslot
`status_reason=...`	Human-readable reason for the change
`send_notification=1`	Notify affected customers
`lock_invoice=1`	Lock invoice state during the reschedule flow

This is the flow used by the reschedule modal in the admin UI.

Retrieve Bookings for a Timeslot

Use the relationship endpoint to populate the Bookings tab:

GET /api/v1/timeslots/{timeslot_id}/regular-bookings?include=customer&sort=-created_at&page[size]=10

This returns regular bookings currently linked to the slot.

Calendar Events and `timeslot_id`

Calendar event payloads can be correlated back to timeslot CRUD flows through timeslot_id. Use this when you need to:

open the matching timeslot editor from a calendar event
fetch the canonical timeslot resource after a calendar query
reconcile resource_info shown in calendar cards with allocation-backed timeslot data

For the aggregate calendar surface, see Booking Calendars.

​What a Timeslot Represents

​List and Filter Timeslots

​Create a Single Timeslot

​Preview and Create Recurring Slots

​Manage Resource Allocations

​Reschedule or Update a Timeslot With Bookings

​Retrieve Bookings for a Timeslot

​Calendar Events and timeslot_id