HubSpot Webhooks When to Use This Skill - Setting up HubSpot webhook handlers - Verifying headers - Debugging signature verification failures - Handling CRM events like contact creation, property changes, or deal events - Migrating from HubSpot signature v1/v2 to v3 Essential Code (USE THIS) HubSpot does not provide an SDK helper for webhook signature verification, so verification is implemented manually with HMAC-SHA256 and base64 across all frameworks. HubSpot Signature Verification (JavaScript) Express Webhook Handler Python (FastAPI) Signature Verification For complete working examples wi…