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

# What's New

## Docs

- [2026-09-17 — Contact Profile Refresh Requests: change-detection fields (`ds_*`)](https://docs.dealsignal.com/whats-new/2026-09-17-cprr-change-detection.md): `response_format=changes` now carries the `ds_*` change-detection fields; the beta `changes[]` key is gone; `changed_company` / `changed_title` compare the primary position with the previous snapshot.
- [2026-05-20 — API key rotation & Authentication tag](https://docs.dealsignal.com/whats-new/2026-05-20-auth-endpoints.md): New `/api/v1/auth/api_keys` endpoints for zero-downtime key rotation.