Create a customer
Creates a new customer with optional contacts, billing address, aliases, and a required default currency.
Authorizations
API key authentication. Pass your API key as a Bearer token.
Headers
2026-04-01 A unique string that makes a retried write safe. If you send the same request with the same key within 24 hours, the API returns the stored response and does not run the request again. A 5xx or 429 response is not stored, so a retry with that key runs the request again.
255"ik_a1b2c3d4e5f6"
Body
ISO 4217 currency code
"USD"
The name of the customer
"Acme Corp"
Alternative identifiers for the customer
When auto-pay charges the customer's invoices. on_issue: when the invoice is issued. on_due_date: on the invoice's due date. Defaults to the organization's default Autopay Timing.
on_issue, on_due_date "on_due_date"
Customer billing address
Customer contacts
Response
Success
Users assigned to the customer, such as the account executive and customer success manager
When auto-pay charges the customer's invoices. on_issue: when the invoice is issued. on_due_date: on the invoice's due date. Subscriptions and invoices can override it.
on_issue, on_due_date "on_issue"
Timestamp when the customer was created
"2026-04-01T10:00:00Z"
ISO 4217 currency code
"USD"
Unique identifier for the customer
"cust_abc123"
Customer name
"Acme Corp"
Timestamp when the customer was last updated
"2026-04-01T12:30:00Z"
Alternative identifiers for the customer
Customer billing address
Customer contacts
ISO 3166-1 alpha-3 country code used for tax determination
"DEU"
Customer tax identification number
"DE123456789"
Tax rate applied to the customer, expressed as a decimal fraction (0.20 = 20%)
"0.20"
Reason determining how tax is applied to the customer
standard_rated, reverse_charge, not_collecting, customer_exempt, zero_rated, other "standard_rated"
Customer tax status
"taxable"
Type of tax applied to the customer
gst, hst, igst, jct, lease_tax, pst, qst, sales_tax, service_tax, vat "vat"