> 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.

## Fixes

* Fixed multipart/form-data PUT requests having form data dropped (JSON was unaffected)

## Documentation Improvements

* Added section in [Constants Doc](/api/manual-reference-pages/constants) clarifying behavior of new parameter `populate_auto_fill_fields`
* Added `client_id` on search query for [List Signature Request](/docs/sdks/migration-guides/ruby#list-signature-request)
* Added additional API Errors to documentation:
  * `?` - Error retrieving result. - `500`
  * `unknown` - Unknown error. Please contact [support@hellosign.com](mailto:support@hellosign.com). - `500`