---
title: "Reserve Slot"
method: POST
path: "/appointments/slots/reserve"
tags: ["Appointments"]
---

# Reserve Slot

`POST /appointments/slots/reserve`

## Request

- Base URL: `https://be.graph8.com/api/v1`
- URL: `https://be.graph8.com/api/v1/appointments/slots/reserve`
- Auth: HTTP bearer

Hold a slot for ten minutes while a booker fills in the form.

NOT a booking: nothing is written to a calendar and nobody is notified.
The hold lapses by itself at `release_at`; release it explicitly if you
know the booker walked away. A slot already taken is a 409.

## Headers

- `Authorization` string, nullable
- `X-Target-Org-Id` string, nullable

## Request body

- ReserveSlotRequest: Hold a slot while a booker fills in the form. The app types both times as bare strings and parses them with `datetime.fromisoformat` inside the handler with no guard, so a malformed value is an unhandled 500 there. They are validated as ISO-8601 here and forwarded unchanged.
  - `event_type_id` integer, required
  - `slot_start` string, required: ISO-8601 start of the slot being held.
  - `slot_end` string, required: ISO-8601 end of the slot being held.

## Response `201`

Successful Response

- ApiResponseSchedulingPayload
  - `data` SchedulingPayload, required: An open envelope for a filter, a setting, an embed config or a slot grid. Open because org settings gain branding fields as the booking page does and the embed config gains styling keys as the widget does. Closing it would drop a field the app had already started returning.
  - `pagination` PaginationMeta
    - `page` integer, required: Current page number (1-indexed)
    - `limit` integer, required: Items per page
    - `total` integer, required: Total number of items
    - `has_next` boolean, required: Whether there are more pages
    - `next_cursor` string, nullable: Opaque cursor for the next page; null when there are no more items. Pass it back as the `cursor` query param to fetch the following page without computing page numbers.
    - `total_available` integer, nullable: Search endpoints only: how many records really match, when known. Can be larger than `total`, which is capped at the 10,000 results that can be paged. For company search this is a distinct-company estimate. Null when unknown; absent outside search.
    - `total_is_lower_bound` boolean, nullable: Search endpoints only: true when more records match than `total` shows (the result set is larger than the 10,000 results that can be paged). Absent outside search.
    - `notes` string[], nullable: Search endpoints only: plain-language notes about the result, e.g. that more records match than can be paged, or that a reversed `between` range was put in order.

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/graph8/apis/graph8-developer-api.md) · [All operations](https://skmtc.dev/graph8/apis/graph8-developer-api/llms.txt) · [OpenAPI document](https://skmtc.dev/graph8/apis/graph8-developer-api/revisions/2e7cfa0ca921?raw)