# 977
source: https://developer.mastercard.com/open-finance-us/documentation/errors/error-codes/977/index.md

This error occurs when calls made have reached the maximum limit allowed by a financial institution in a given time frame.

|             Title             |                                                                                                                                   Details                                                                                                                                    |
|-------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| **Aggregation Status Code**   | 977                                                                                                                                                                                                                                                                          |
| **Remediation Category**      | Report or Escalate for Investigation                                                                                                                                                                                                                                         |
| **HTTP Status**               | 500                                                                                                                                                                                                                                                                          |
| **Error Type**                | Account Error/Institution Error                                                                                                                                                                                                                                              |
| **Data Connect Alert**        | No associated alert.                                                                                                                                                                                                                                                         |
| **Error Message**             | Service has reached the maximum limit or expired. ​                                                                                                                                                                                                                          |
| **Common Causes**             | This error happens when the number of requests to a particular financial institution exceeds the set rate limit.                                                                                                                                                             |
| **Troubleshooting Steps**     | Review all requests made with your API credentials. This can help you identify if you're sending an excessive number of requests to a particular financial institution. Ensure that you're only making necessary API calls and that you're efficiently using each request. ​ |
| **Data Connect Fix Eligible** | No.                                                                                                                                                                                                                                                                          |
| **Retriable by End User**     | No.                                                                                                                                                                                                                                                                          |
| **Access to Latest Data**     | You cannot access the latest data for this account until the issue is resolved.                                                                                                                                                                                              |

[Full Error List](https://developer.mastercard.com/open-finance-us/documentation/errors/error-list/index.md) \| [Account Errors](https://developer.mastercard.com/open-finance-us/documentation/errors/account-errors/index.md) \| [Institution Errors](https://developer.mastercard.com/open-finance-us/documentation/errors/institution-errors/index.md)