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Generating a Bearer Token for Authentication {#sis-pymnt-svcs-cloud-mode-bearer-tkn-intro}
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Use this information to generate a bearer token for authentication. A unique bearer token is required to authenticate each payment transaction request when the app is in Cloud mode.

Generate a Bearer Token for Authentication {#sis-pymnt-svcs-cloud-mode-bearer-token-task}
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Generate a new bearer token before sending a transaction request.
IMPORTANT Meta keys are not supported for bearer token generation.  
Follow these steps to generate a bearer token:

1. Create a P12 certificate for the transacting merchant ID (MID).
2. Construct a message using a JSON web Token (JWT) by following the steps shown in the [*Getting Started with REST Developer Guide*](https://developer.cybersource.com/docs/cybs/en-us/platform/developer/all/rest/rest-getting-started/restgs-jwt-message-intro/restgs-jwt-const-intro.md "").
3. Set the digest field (message body) in the JWT as blank.
4. Use the JWT as the bearer token to authenticate the payment transaction request.  
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