curl -X PATCH 'https://api.elevenlabs.io/v1/dubbing/project/project-id/transcript/segment/segment-id' \
  -H "xi-api-key: $ELEVENLABS_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
  "text": "string",
  "speaker_id": "string",
  "start_s": 0,
  "end_s": 0
}'

# PATCH /v1/dubbing/project/{project_id}/transcript/segment/{segment_id} (ElevenLabs API)
Base URL: https://api.elevenlabs.io
Auth: xi-api-key: <ELEVENLABS_API_KEY>
Last verified: 2026-09-03

> Update Dubbing Transcript Segment

## Critical Gotchas
* Authentication uses the non-standard `xi-api-key` header, not `Authorization: Bearer`. Sending a Bearer token returns HTTP 401.
* Text-to-speech responses are raw binary audio, not JSON. Write the body to a file (`--output speech.mp3`) rather than parsing it.

## cURL
curl -X PATCH 'https://api.elevenlabs.io/v1/dubbing/project/project-id/transcript/segment/segment-id' \
  -H "xi-api-key: $ELEVENLABS_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{"text":"string","speaker_id":"string","start_s":0,"end_s":0}'

## Parameters
| Name | In | Type | Required | Description |
| :--- | :--- | :--- | :--- | :--- |
| project_id | path | string | Yes | Identifier of the dubbing project. |
| segment_id | path | string | Yes | Identifier of the segment to edit. |
| text | body | string | No | New text for the segment. |
| speaker_id | body | string | No | New speaker ID for the segment. |

## Response (200 OK)
{"segment":{"id":"string","text":"string"},"revision":0}

---
Need an API key? Get one at https://elevenlabs.io/app/sign-up

PATCH

/v1/dubbing/project/{project_id}/transcript/segment/{segment_id}

ElevenLabs API

Update Dubbing Transcript Segment

Base URL: https://api.elevenlabs.io
Auth: xi-api-key: <ELEVENLABS_API_KEY>
Last verified: 2026-09-03 · upstream hash matched

Actions

Agents: curl -H "Accept: text/markdown" this URL
→ 231 tokens · Vary: Accept

Critical gotchas

Authentication uses the non-standard xi-api-key header, not Authorization: Bearer. Sending a Bearer token returns HTTP 401.

Text-to-speech responses are raw binary audio, not JSON. Write the body to a file (--output speech.mp3) rather than parsing it.

cURL

curl -X PATCH 'https://api.elevenlabs.io/v1/dubbing/project/project-id/transcript/segment/segment-id' \  -H "xi-api-key: $ELEVENLABS_API_KEY" \  -H 'Content-Type: application/json' \  -d '{  "text": "string",  "speaker_id": "string",  "start_s": 0,  "end_s": 0}'

Get a free ElevenLabs API key → sponsored

Parameters

Name	In	Type	Required	Description
project_id	path	string	Yes	Identifier of the dubbing project.
segment_id	path	string	Yes	Identifier of the segment to edit.
text	body	string	No	New text for the segment.
speaker_id	body	string	No	New speaker ID for the segment.
start_s	body	number	No	New start time, in seconds.
end_s	body	number	No	New end time, in seconds.

Response 200 OK

{
  "segment": {
    "id": "string",
    "text": "string",
    "speaker_id": "string",
    "start_s": 0,
    "end_s": 0,
    "external_id": "string"
  },
  "revision": 0
}