CF7 API Endpoint

I am trying to setup a contact form to capture certain parameters (name, email, survey_type) and post to an external url format JSON using an api token, to our supplier https://www.domain.com/api/{PATH}/participants.

But I have no idea how and if this can be done as the API document is very limited.

Example JSON payload

{
  "participant": {
    "name": "Joe Bloggs",
    "email": "[email protected]",
    "survey_type": "V1::SamSurvey",
    "optional_keys": ["financial_reporting"]
  }
}

Example successful response

HTTP/1.1 201 Created

{
  "id": 5000,
  "name": "Joe Bloggs",
  "email": "[email protected]",
  "created_at": "2015-10-22T12:51:50.149Z",
  "updated_at": "2015-10-22T12:51:50.149Z"
}

Example unsuccessful response

HTTP/1.1 422 Unprocessable Entity

{
  "errors": {
    "name": ["can't be blank"],
    "email": ["can't be blank"],
    "survey_type": ["can't be blank"]
  }
}