Invite a single employee for the company associated with your API key. Validation is plan-aware: timetracking plans accept a smaller field set and reject payroll-specific fields; payroll/premium plans support all employment types. Swagger request examples are grouped by plan and employment type so you can copy the exact payload profile you need.

Field rules matrix:

• General required (all types/plans): first_name, last_name, email, employment_type, start_date
• General optional (all types/plans): middle_name, timetrack_only (defaults false)
• Timetracking plan employment types: admin, employee (payroll-specific fields and timetrack_only are not accepted)
• Payroll/Premium plan employment types: admin, employee, contractor (with optional timetrack_only)
• Admin: same base fields; manager_type is premium-only; timetrack_only not valid
• Employee (timetrack_only=false): workplace (workplace ID) required + payment_unit required
• Contractor: same wage branching as employee, but workplace is not required
• payment_unit=hour: payment_amount required (0 allowed), overtime_amount required (min 1.5), default_hours optional
• payment_unit=salary: salary_type required, salary required (0 allowed)
• payment_unit=hourly_salary: requires both hour and salary fields
• is_i9_form_required: available for employee types on premium plans