---
page_type: error
code: 20151
message: "20151: Authentication Failed"
level: ERROR
product: Platform
---

## Error - 20151

### Authentication Failed

The Authentication with the provided JWT failed.

#### Possible Causes

- The system could not perform the authorization for the given request.

#### Possible Solution:

- Retry, if this keeps happening, please contact the Twilio Support
- To check whether the JWT is structurally correct, you can use the tools available at jwt.io.