When configuring an HTTP request in the Action flow, for Content Type, only application/json, application/x-www.form-urlencoded, and application/xml options are available. This article explains how to add application/vnd.api+json as the content type.

• HTTP Request
• Actions

In the Headers section, please add:

Content-type: application/vnd.api+json

Please note the type is in lowercase in "Content-type." If "Content-Type" is spelled with an uppercase T, the request will not work.