> This page is for version 2022-09-01.
> For other versions, use one of these documentation indexes:
> - 2026-09-29 (default): https://docs.withpersona.com/2026-09-29/llms.txt
> - 2025-12-08: https://docs.withpersona.com/2025-12-08/llms.txt
> - 2025-10-27: https://docs.withpersona.com/2025-10-27/llms.txt
> - 2023-01-05: https://docs.withpersona.com/2023-01-05/llms.txt
> - 2022-09-01: https://docs.withpersona.com/2022-09-01/llms.txt
> - 2021-07-05: https://docs.withpersona.com/2021-07-05/llms.txt
> - 2021-05-14: https://docs.withpersona.com/2021-05-14/llms.txt
> - 2020-05-18: https://docs.withpersona.com/2020-05-18/llms.txt

> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.withpersona.com/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.withpersona.com/_mcp/server.

### Cross-API

* 🌱🔒 **Configurable expiration for File URL access tokens**: By default, the signed access token included in File URLs remains valid for 6 hours after the API request was made. This expiration period can now be configured per API Key. For more details, see [File URLs](/downloading-files).
* 🍃 **Field Schema for File types include set of supported MIME types**: Responses that include field schemas with type `FieldSchema::File` now include the list of supported mime types within `config` under `supported-mime-types`.