# POST /v1/pronunciation-dictionaries/{pronunciation_dictionary_id}/set-rules (ElevenLabs API)
Base URL: https://api.elevenlabs.io
Auth: xi-api-key: <ELEVENLABS_API_KEY>
Last verified: 2026-09-03

> Set Rules On The Pronunciation Dictionary

## 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/pronunciation-dictionaries/pronunciation-dictionary-id/set-rules' \
  -H "xi-api-key: $ELEVENLABS_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{"rules":[{}]}'

## Parameters
| Name | In | Type | Required | Description |
| :--- | :--- | :--- | :--- | :--- |
| pronunciation_dictionary_id | path | string | Yes | The id of the pronunciation dictionary |
| rules | body | object[] | Yes | List of pronunciation rules. Rule can be either:     an a... |

## Response (200 OK)
{"id":"5xM3yVvZQKV0EfqQpLrJ","version_id":"5xM3yVvZQKV0EfqQpLr2","version_rules_num":5}

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