---
title: "Reject call"
method: POST
path: "/realtime/calls/{call_id}/reject"
tags: ["Realtime"]
---

# Reject call

`POST /realtime/calls/{call_id}/reject`

Decline an incoming SIP call by returning a SIP status code to the caller.

## Path parameters

- `call_id` string, required

## Request body

- RealtimeCallRejectRequest — Parameters used to decline an incoming SIP call handled by the Realtime API.
  - `status_code` integer — SIP response code to send back to the caller. Defaults to `603` (Decline) when omitted.

## Response `200`

Call rejected successfully.

## Other responses

- `404` — The session or call was not found or is unavailable for this operation.
- `409` — The session or call can no longer accept this operation.
- `500` — An internal error occurred. The response body is plain text.

## Changes

- **2026-09-25** `d86203de41ae` — 3 info
  - added the non-success response with the status `404`
  - added the non-success response with the status `409`
  - added the non-success response with the status `500`
- **2026-05-13** `74cbcf73838f` — 1 info
  - endpoint added

[Change history](https://skmtc.dev/openai/apis/openapi/changes/realtime/calls/:call_id/reject/post.md)

---

[API](https://skmtc.dev/openai/apis/openapi.md) · [All operations](https://skmtc.dev/openai/apis/openapi/llms.txt) · [OpenAPI document](https://skmtc.dev/openai/apis/openapi/revisions/d86203de41ae?raw)