Record attendance by email for an external event
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Record attendance by email for an external event
with HubSpot
Works with AI assistants
Use HubSpot: its Marketing Marketing Events Event Attendees API lets you record attendance by email for an external event in a single step (POST /marketing/marketing-events/2026-09/attendance/{externalEventId}/{subscriberState}/email-create). HubSpot also has an MCP server, so an AI assistant like Claude or ChatGPT can do it for you. capabilities.work can help you get signed up and connected.
- Can I register attendees by email address for an event I identify with my own external event ID?
- Will a new contact be created if an attendee's email isn't in the CRM yet when I use an external event ID?
Say it to your AI assistant
- Record attendee emails {inputs} as {subscriberState} for external event {externalEventId}.
- Mark emails {inputs} as {subscriberState} on external event {externalEventId} under external account {externalAccountId}.
For your developer
POST /marketing/marketing-events/2026-09/attendance/{externalEventId}/{subscriberState}/email-create in Marketing Marketing Events Event Attendees API. Full spec on APIs.io.