Record attendance by contact ID for an external event
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Record attendance by contact ID for an external event
with HubSpot
Works with AI assistants
Use HubSpot: its Marketing Marketing Events Event Attendees API lets you record attendance by contact ID for an external event in a single step (POST /marketing/marketing-events/2026-09/attendance/{externalEventId}/{subscriberState}/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.
- How do I mark contacts as attending an event I track by my own external event ID, using their contact IDs?
- Can I log join and leave times when recording contact IDs as attendees of an externally identified event?
Say it to your AI assistant
- Record contact IDs {inputs} as {subscriberState} for external event {externalEventId}.
- Log contact IDs {inputs} as {subscriberState} on external event {externalEventId} for external account {externalAccountId}.
For your developer
POST /marketing/marketing-events/2026-09/attendance/{externalEventId}/{subscriberState}/create in Marketing Marketing Events Event Attendees API. Full spec on APIs.io.