JSON Web Token Message Elements {#restgs-jwt-const-elements}
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A JWT message consists of HTTP headers and an HTTP message body.

**HTTP Message Elements**
:
Your HTTP message header must include these elements:
:

    | HTTP Header Element |                                                                      Description                                                                       |
    |---------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------|
    | **content-type**    | Also known as the Multipurpose Internet Mail Extension (MIME) type, this element identifies the media or file type of the resource (application/json). |
    | **host**            | The transaction endpoint. (`api.cybersource.com`)                                                                                                      |
    | **authorization**   | JSON Web Signature (JWS) bearer token.                                                                                                                 |
    [HTTP Message Header Elements]

**HTTP Message Body**
:
Your API request.