| Group Name | Yes | Must match an existing Planning Center group name (case-insensitive). |
| Role | Yes | Must resolve to leader or member. |
| Full Name | Conditional | Required unless both First Name and Last Name are provided. Supports Last, First and First Last. |
| First Name | Conditional | Required with Last Name unless Full Name is provided. Used for person matching. |
| Last Name | Conditional | Required with First Name unless Full Name is provided. Used for person matching. |
| Remote ID | No | Must be an unsigned integer when provided. |
| Email | No | Improves matching. |
| Phone Number | No | Improves matching (normalized internally). |
| Joined At | No | Parsed using supported date formats. |