# Create a payment method

Create a new payment method for a customer

Endpoint: POST /payment_methods/bank_accounts
Version: 1.0.0
Security: ApiKeyAuth, ApiKeySecret

## Request fields (application/json):

  - `accountNumber` (string, required)
    The bank account or debit card number.
    Example: "445566790"

  - `accountType` (string, required)
    The bank account type. Can be either:
  - savings
  - checking
  - debit_card
    Enum: "savings", "checking", "debit_card"

  - `customerId` (string, required)
    The unique identifier created by Belvo used to reference the customer.
    Example: "3118128a-6792-4b06-bd61-4acf6f6ad6b5"

  - `bank` (string, required)
    The name of the Mexican bank where the account is held.


For a full list of institutions, please see our dedicated Payment Institutions page.

  - `reference` (string)
    An optional reference description for the bank account.
    Example: "SAVINGS_445566790"

## Response 201 fields (application/json):

  - `paymentMethodId` (string)
    The unique identifier created by Belvo used to reference the payment method.
    Example: "0d1a377b-b4c5-4a94-9e2e-83e59d1f6a9c"

## Response 400 fields (application/json):

  - `statusCode` (integer)
    The HTTP status code for this error.
    Example: 400

  - `error` (string)
    The HTTP status code description for this error.
    Example: "Bad Request"

  - `message` (any)
    A short description of the error, indicating what is wrong with the request.
> Note: We return either a string or an array of strings, depending on the validation error(s). 

The description can be (among others):

  - id must be a UUID
  - Not enough balance
  - amount is not a valid decimal number.
  - currency must be one of the following values: cop, mxn, usd
  - reference must be a string
  - Customer not found for merchant
  - documentType is a required field
    Example: "id must be a UUID"

## Response 401 fields (application/json):

  - `statusCode` (integer)
    The HTTP status code for this error.
    Example: 401

  - `error` (string)
    The HTTP status code description for this error.
    Example: "Unauthorized"

  - `message` (string)
    A short description of the error, indicating what is wrong with the request.
In the case of a 401 Unauthorized error, the message is:

  - Unauthorized credentials
    Example: "Unauthorized credentials"

## Response 404 fields (application/json):

  - `statusCode` (integer)
    The HTTP status code for this error.
    Example: 404

  - `error` (string)
    The HTTP status code description for this error.
    Example: "Not Found"

  - `message` (string)
    A short description of the error, indicating what is wrong with the request.
The description can be (among others):

  - Payout Target not found
  - Payment method not found
  - Customer not found
    Example: "Payout Target not found"