# Appendix E: Custom Fields & Extended Attributes

# Custom Fields

## Supported Resources
- Agents
- Contacts
- Leads
- Developments
- Offices

## Custom Field Types
- text: Short text
- textarea: Long text
- select: Single selection
- multiselect: Multiple selections
- checkbox: Boolean
- date: Date value
- number: Numeric value
- email: Email address
- phone: Phone number
- url: URL

## Working with Custom Fields
- Retrieve schema with GET /company_*_custom_fields
- Include in request/response under custom_fields
- Validate against field schema