List participants of an event by its external ID
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List participants of an event by its external ID
with HubSpot
Works with AI assistants
Use HubSpot: its Marketing Marketing Events Participant State API lets you list participants of an event by its external ID in a single step (GET /marketing/marketing-events/2026-09/participations/{externalAccountId}/{externalEventId}/breakdown). 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.
- Who attended an event I synced from my external event tool?
- Can I filter the participant list of an externally managed event to just no-shows?
Say it to your AI assistant
- List participants of external event {externalEventId} in account {externalAccountId}.
- Show participants with state {state} for external event {externalEventId} under account {externalAccountId}.
- Check whether contact {contactIdentifier} participated in external event {externalEventId} from account {externalAccountId}.
For your developer
GET /marketing/marketing-events/2026-09/participations/{externalAccountId}/{externalEventId}/breakdown in Marketing Marketing Events Participant State API. Full spec on APIs.io.