> ## 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 Real Time API.

## Account Number Fields

| Field Name           | Data Type | Description                                                                             |
| -------------------- | --------- | --------------------------------------------------------------------------------------- |
| `account_guid`       | `String`  | The unique identifier for the associated account. Defined by MX.                        |
| `account_id`         | `String`  | Partner-provided unique identifier for the account associated with this account number. |
| `account_number`     | `String`  | Full, unmasked banking account number associated with the account.                      |
| `institution_number` | `String`  | Three-digit number identifying a Canadian banking institution.                          |
| `member_guid`        | `String`  | Unique identifier for the member of the associated account. Defined by MX.              |
| `member_id`          | `String`  | Partner-provided unique identifier for the member of the associated account.            |
| `passed_validation`  | `String`  | Indicates whether account and routing numbers passed MX validation checks.              |
| `routing_number`     | `String`  | Routing number for the financial institution associated with the account.               |
| `transit_number`     | `String`  | Five-digit number identifying the branch of a Canadian financial institution.           |
| `user_guid`          | `String`  | Unique identifier for the user of the associated account. Defined by MX.                |
| `user_id`            | `String`  | Partner-provided unique identifier for the user of the associated account.              |