> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mx.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Account Number Fields

> Account number fields for the MDX On Demand API.

## Account Number Fields

| Field Name       | Data Type | Description                                                                     |
| ---------------- | --------- | ------------------------------------------------------------------------------- |
| `account_number` | `String`  | The full, unmasked banking account number associated with a particular account. |
| `routing_number` | `String`  | The routing number for the financial institution associated with the account.   |