Messtone Devices Enables Capital One DeveExchange Sandbox(https://api-sandbox.capitalone.com) is a virtual testing environment that simulates the way each API will respond in a production environment.It provides a secure and isolated space where Messtone can test his application code without touching any real Capital One accounts or user data. Get request production access OAuth 2 is an authorized of Capital One API, Messtone pass the access token to the Authorization as follows`POST/oauth2/token REQUEST HEADERS _ Accept string Specifics the MIME type that Messtone accept in the body of the response. Example: Accept: application/json Content-Type string Content-Type: application/x-www-form-urlencoded