Create a custom CRM property
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Create a custom CRM property
with HubSpot
Works with AI assistants
Use HubSpot: its Hubspot Basic API lets you create a custom CRM property in a single step (POST /crm/properties/2026-09/{objectType}). 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 add a custom field to contacts?
- Can I create a dropdown property with fixed options?
Say it to your AI assistant
- Create property {name} labelled {label}, type {type}, field {fieldType}, in group {groupName} on {objectType}.
- Add a {type}/{fieldType} field {name} ({label}) with options {options} to group {groupName} of {objectType}.
For your developer
POST /crm/properties/2026-09/{objectType} in Hubspot Basic API. Full spec on APIs.io.