curl -X POST 'https://api.elevenlabs.io/v1/convai/knowledge-base/documentation-id/rag-index' \
  -H "xi-api-key: $ELEVENLABS_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
  "model": "e5_mistral_7b_instruct"
}'

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

> Compute Rag Index.

## 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 POST 'https://api.elevenlabs.io/v1/convai/knowledge-base/documentation-id/rag-index' \
  -H "xi-api-key: $ELEVENLABS_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{"model":"e5_mistral_7b_instruct"}'

## Parameters
| Name | In | Type | Required | Description |
| :--- | :--- | :--- | :--- | :--- |
| documentation_id | path | string | Yes | The id of a document from the knowledge base. This is ret... |
| model | body | string | Yes | Request body field model. |

## Response (200 OK)
{"id":"string","model":"e5_mistral_7b_instruct"}

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

POST

/v1/convai/knowledge-base/{documentation_id}/rag-index

ElevenLabs API

Compute Rag Index.

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
→ 195 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 POST 'https://api.elevenlabs.io/v1/convai/knowledge-base/documentation-id/rag-index' \  -H "xi-api-key: $ELEVENLABS_API_KEY" \  -H 'Content-Type: application/json' \  -d '{  "model": "e5_mistral_7b_instruct"}'

Get a free ElevenLabs API key → sponsored

Parameters

Name	In	Type	Required	Description
documentation_id	path	string	Yes	The id of a document from the knowledge base. This is returned on document addition.
model	body	string	Yes	Request body field model.

Response 200 OK

{
  "id": "string",
  "model": "e5_mistral_7b_instruct",
  "status": "new",
  "progress_percentage": 0,
  "document_model_index_usage": {
    "used_bytes": 0
  }
}