Update a customer
Patches an existing customer. Only the fields provided in the request body are modified. Supplying contacts or aliases replaces the full list. The id path parameter accepts the Alguna account ID, a customer alias, or a connected-account external ID (such as a Stripe customer ID).
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"
Path Parameters
Unique identifier for the customer
Body
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. Applies to invoices issued after the change.
on_issue, on_due_date "on_due_date"
Customer billing address
Customer contacts. Replaces all existing contacts when provided
ISO 4217 currency code
"USD"
The name of the customer
"Acme Corp"
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"