Developers
API keys and webhooks
The REST API, signed webhooks and the Zapier and n8n steps.
Create API keys in Settings → Integrations & API. Send them as a Bearer token to /api/v1. Responses use one envelope: success, data and meta.
Webhooks
Subscribe a URL to events like lead.replied, meeting.booked or campaign.finished. Each request is signed with HMAC-SHA256 in the x-relay-signature header.
Flow steps
Trigger a Zap or an n8n workflow from any point in a flow, or create and update contacts in HubSpot or GoHighLevel.