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Count attendees for an event by its external ID

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Count attendees for an event by its external ID

with HubSpot
Works with AI assistants

Use HubSpot: its Marketing Marketing Events Participant State API lets you count attendees for an event by its external ID in a single step (GET /marketing/marketing-events/2026-09/participations/{externalAccountId}/{externalEventId}). 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 many people registered, attended or cancelled for an event synced from my event app?
  • Can I get attendance totals using the event ID from my external event platform?
Say it to your AI assistant
  • Get participation counts for external event {externalEventId} in account {externalAccountId}.
  • Tally registrations and attendance for event {externalEventId} from external account {externalAccountId}.
For your developer

GET /marketing/marketing-events/2026-09/participations/{externalAccountId}/{externalEventId} in Marketing Marketing Events Participant State API. Full spec on APIs.io.

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