# PATCH /v1/convai/knowledge-base/{documentation_id} (ElevenLabs API)
Base URL: https://api.elevenlabs.io
Auth: xi-api-key: <ELEVENLABS_API_KEY>
Last verified: 2026-09-03

> Update Document

## 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/convai/knowledge-base/documentation-id' \
  -H "xi-api-key: $ELEVENLABS_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{"name":"string","content":"string"}'

## Parameters
| Name | In | Type | Required | Description |
| :--- | :--- | :--- | :--- | :--- |
| documentation_id | path | string | Yes | The id of a document from the knowledge base. This is ret... |
| name | body | string | No | A custom, human-readable name for the document. |
| content | body | string | No | Updated content for the document. Only supported for text... |

## Response (200 OK)
{"id":"string","name":"string"}

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