> For a complete page index, fetch https://docs.synthflow.ai/llms.txt. For full documentation content, fetch https://docs.synthflow.ai/llms-full.txt. ## Phone Book Support in Call Transfer API You can now reference an existing phone book in call transfer actions with phone\_book\_id, bringing the API in line with the UI. | Endpoint | Change | | :---------------------------------------------------------------------------------- | :---------------------------------------------------------------------- | | [**POST /actions**](/api-reference/platform-api/actions/create-action) | Creates `LIVE_TRANSFER` actions with either `phone_book_id` or `phone`. | | [**PUT /actions/\{action\_id}**](/api-reference/platform-api/actions/update-action) | Updates `LIVE_TRANSFER` actions with either `phone_book_id` or `phone`. |