Upsert postal mail by a unique value
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Upsert postal mail by a unique value
with HubSpot
Works with AI assistants
Use HubSpot: its Hubspot Batch API lets you upsert postal mail by a unique value in a single step (POST /crm/objects/2026-03/postal_mail/batch/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 mailings from a print vendor so existing records update?
- Which unique property keys a postal mail upsert?
Say it to your AI assistant
- Upsert postal mail {mail_pieces} by unique property.
- Sync printed mailings {mail_pieces}, creating or updating each.
For your developer
POST /crm/objects/2026-03/postal_mail/batch/upsert in Hubspot Batch API. Full spec on APIs.io.