Notion Webhook

Small FastAPI service that receives Notion webhook callbacks. It validates the X-Notion-Signature, handles the initial subscription handshake, fetches the full Notion entity (page or database) on each event, and can store the rendered Markdown snapshot in PostgreSQL.

What this project solves

• Expose /webhook/notion so you can plug a Notion integration and receive live updates without polling.
• Keep verification and signature validation simple so you can provision webhooks quickly.
• Optionally persist the latest Markdown snapshot (plus metadata) for each page/database to drive downstream workflows.

For architecture, setup instructions, deployment notes, and troubleshooting guides, see AGENT.md.