Link a list to an event by its external IDs

Link a list to an event by its external IDs

Works with AI assistants

Use HubSpot: its Marketing Marketing Events List Associations API lets you link a list to an event by its external IDs in a single step (PUT /marketing/marketing-events/2026-09/associations/{externalAccountId}/{externalEventId}/lists/{listId}). 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 attach a contact list to a marketing event using my external event ID?
• Can I associate a list with an event that my integration identifies by external account and event IDs?

Say it to your AI assistant

• Associate list {listId} with external event {externalEventId} in external account {externalAccountId}.
• Attach list {listId} to my app's event {externalEventId} under account {externalAccountId}.

For your developer

PUT /marketing/marketing-events/2026-09/associations/{externalAccountId}/{externalEventId}/lists/{listId} in Marketing Marketing Events List Associations API. Full spec on APIs.io.