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": [
    {
      "alias": "tie-land",
      "case_sensitive": true,
      "string_to_replace": "Thailand",
      "type": "alias",
      "word_boundaries": true
    }
  ]
}'

# 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}

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

POST

/v1/pronunciation-dictionaries/{pronunciation_dictionary_id}/set-rules

ElevenLabs API

Set Rules On The Pronunciation Dictionary

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
→ 199 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/pronunciation-dictionaries/pronunciation-dictionary-id/set-rules' \  -H "xi-api-key: $ELEVENLABS_API_KEY" \  -H 'Content-Type: application/json' \  -d '{  "rules": [    {      "alias": "tie-land",      "case_sensitive": true,      "string_to_replace": "Thailand",      "type": "alias",      "word_boundaries": true    }  ]}'

Get a free ElevenLabs API key → sponsored

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 alias rule: {'string_to_replace': 'a', 'type': 'alias', 'alias': 'b', } or a phoneme rule: {'string_to_replace': 'a', 'type': 'phoneme', 'phoneme': 'b', 'alphabet': 'ipa' }

Response 200 OK

{
  "id": "5xM3yVvZQKV0EfqQpLrJ",
  "version_id": "5xM3yVvZQKV0EfqQpLr2",
  "version_rules_num": 5
}