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

## Features

* [Signature Request Expiration Date](/api/manual-reference-pages/expiration) is now available for all API customers.
* The Signature modal in the Signer App has been updated with improved visuals and drawing canvas.