typek3 | Stripe Developers | Page 1

Express Accounts have their own dashboard, so usually they would update this themselves. As far as I know, the API only works for Custom accounts. That is mentioned in the API reference: https://stripe.com/docs/api/external_account_bank_accounts/create

Stripe API reference – Create a bank account – curl

Complete reference documentation for the Stripe API. Includes code snippets and examples for our Python, Java, PHP, Node.js, Go, Ruby, and .NET libraries.

#typek3