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POST
Error

Authorizations

Authorization
string
header
required

A merchant secret key (sk_…) sent as Authorization: Bearer <key>.

Headers

Idempotency-Key
string

A unique key that makes retries safe: the same key with the same request body returns the original response instead of repeating the operation.

Maximum string length: 255
Ionic-Account
string

Merchant ID when an authorized Platform acts for a connected Merchant. Omit when authenticating directly as that Merchant.

Pattern: ^mer_[0-9A-Za-z]{14}$

Path Parameters

id
string
required

The customer id (cus_…).

Body

application/json
default_payment_method
string | null

Payment method id (pm_…). Pass null to clear the default.

Response

The updated customer.

id
string
required

Unique customer identifier (cus_…).

object
enum<string>
required
Available options:
customer
merchant_id
string
required
livemode
boolean
required

Whether this customer was created with a live (true) or test (false) key.

test_clock
string | null
required

The immutable logical billing clock attached at creation; null when this customer uses wall-clock time.

email
string
required
first_name
string
required

Empty string when not set.

last_name
string
required

Empty string when not set.

phone
string
required

Empty string when not set.

billing_address
object | null
required

Billing address; null when not set.

shipping
object | null
required

Shipping details; null when not set.

creation_source
enum<string>
required

How the customer was created (for example api).

Available options:
api,
checkout,
import,
dashboard,
platform
payment_settings
object
required

Payment configuration stored for the customer.

metadata
object
required
deleted
boolean
required

True when the customer has been soft-deleted.

created_at
integer
required

Unix epoch seconds.

updated_at
integer
required