---
title: "POST /api/v1/Calendar/Events/CheckConflicts Scans for events that overlap the proposed time window for each requested user. Used by the create/edit modals to warn about double-booking before saving."
method: POST
path: "/api/v1/Calendar/Events/CheckConflicts"
tags: ["Calendar"]
---

# POST /api/v1/Calendar/Events/CheckConflicts Scans for events that overlap the proposed time window for each requested user. Used by the create/edit modals to warn about double-booking before saving.

`POST /api/v1/Calendar/Events/CheckConflicts`

## Request

- Base URL: `https://api.fireserviceusa.com` (the document declares no server; this is the origin it was published from)
- URL: `https://api.fireserviceusa.com/api/v1/Calendar/Events/CheckConflicts`
- Auth: none declared

## Request body

- CheckEventConflictsVm
  - `UserIds` integer[], nullable: Organizer + attendee P2 user ids to scan.
  - `StartDateTimeUtc` string, date-time
  - `EndDateTimeUtc` string, date-time
  - `IsAllDay` boolean
  - `ExcludeOutlookEventId` string, nullable: When editing, the event (and optionally its series) to exclude from the scan.
  - `ExcludeEditScope` string, nullable: occurrence (default) excludes only that event; series excludes the whole series.

## Response `200`

Success

---

[API](https://skmtc.dev/fireserviceusa/apis/fireservice-usa-p2-api.md) - [All operations](https://skmtc.dev/fireserviceusa/apis/fireservice-usa-p2-api/llms.txt) - [OpenAPI document](https://skmtc.dev/fireserviceusa/apis/fireservice-usa-p2-api/revisions/96ea2ea68d87?raw)