Upsert a marketing event by external ID
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Upsert a marketing event by external ID
with HubSpot
Works with AI assistants
Use HubSpot: its Hubspot Basic API lets you upsert a marketing event by external ID in a single step (PUT /marketing/marketing-events/2026-09/events/{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.
- Can I create or update a marketing event in one call using its external ID?
- What happens if the external event already exists when I upsert?
Say it to your AI assistant
- Upsert event {externalEventId} as {eventName} by {eventOrganizer} for account {externalAccountId} with {customProperties}.
- Create or update external event {externalEventId} ({eventName}, {eventOrganizer}, {externalAccountId}, {customProperties}).
For your developer
PUT /marketing/marketing-events/2026-09/events/{externalEventId} in Hubspot Basic API. Full spec on APIs.io.