A unique reference hash for the Forage PaymentMethod, returned when the PaymentMethod was created.

A unique ID for the end customer associated with the payment method. customer_id can only be set once and can't be changed, so this param only applies if the PaymentMethod doesn't yet include a customer_id. If you try to update the customer_id field after it has already been set, then the API throws an error.

You must build with Forage Version 2023-05-15 or later to use customer_id. Either pass 2023-05-15 as the API-Version header on a per request basis, or set the version for all requests in the Forage dashboard.

An OAuth 2.0 authentication token that validates the request. Send a POST to the /o/token/ endpoint to generate an authentication token. Pass the token in this header after the word Bearer and a whitespace, for example Bearer <api_key>.

A unique merchant ID that Forage provides during onboarding, as in 123ab45c67. The Merchant ID can be found in the Forage sandbox or production dashboard.

Pass a Merchant-Account header to create a PaymentMethod associated with a specific merchant account for routing and reporting purposes. This header does not restrict PaymentMethods to a single merchant account. PaymentMethods are tenant-scoped and can be used across all merchant accounts within the same tenant.