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Create or update marketing events by external ID

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Create or update marketing events by external ID

with HubSpot
Works with AI assistants

Use HubSpot: its Hubspot Batch API lets you create or update marketing events by external ID in a single step (POST /marketing/marketing-events/2026-09/events/upsert). 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 sync webinars from my event platform so existing marketing events update?
  • Can my app update marketing events that a different app created?
Say it to your AI assistant
  • Upsert marketing events {marketing_events}.
  • Sync these webinars into marketing events, creating any that are new: {marketing_events}.
For your developer

POST /marketing/marketing-events/2026-09/events/upsert in Hubspot Batch API. Full spec on APIs.io.

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