# Add a new MAK An HTTPS POST is issued with the "ContentType" header specifying the format of the request and the "Accept" header specifying the format of the response. Endpoint: POST /addMAK ## Request fields (application/json): - `CustomerID` (string, required) The [License Key](https://docs.melissa.com/melissa/license/license-information.html) issued by Melissa. - `TransmissionReference` (string) Optional. Value passed through unchanged to the response for identification or any other purpose. - `AddressLine1` (string, required) A minimum address location for the contact. - `AddressLine2` (string) The second address line. - `AddressLine3` (string) The third address line. - `AddressLine4` (string) The fourth address line. - `AddressLine5` (string) The fifth address line. - `AddressLine6` (string) The sixth address line. - `AddressLine7` (string) The seventh address line. - `AddressLine8` (string) The eighth address line. - `AdministrativeArea` (string, required) Administrative Area, Province, State. The most common geographic data element. - `Country` (string, required) ISO2 code for the country. - `Latitude` (string, required) The corrected latitude. Optional if Longitude is provided. - `Locality` (string, required) City, Locality, Municipality. The most common population center data element. - `Longitude` (string, required) The corrected longitude. Optional if Latitude is provided. - `Organization` (string) The organization name. - `PostalCode` (string, required) The ZIP Code. - `Reason` (string) Any additional information you want to add about the change request. - `RespondToEmail` (string) The email address to receive updates about the change request. ## Response 200 fields (application/json): - `Version` (string) The current service version number. - `TransmissionResults` (string) Lists error codes from any errors caused by the most recent request as a whole. For more information, see [Contribution Result Codes](https://docs.melissa.com/cloud-api/contribution/result-codes.html). - `TransmissionReference` (string) Serves as a unique request identifier. - `Results` (string) Comma delimited status, error codes, and change codes for the record. For more information, see [Contribution Result Codes](https://docs.melissa.com/cloud-api/contribution/result-codes.html). - `Message` (string) The response message for the request. ## Response 400 fields (application/json): - `type` (string) The type of error that occurred. - `title` (string) A short summary of the error. - `status` (integer) The HTTP status code for the error. - `errors` (object) - `errors.$.` (array) A detailed message about the error. - `traceId` (string) A unique identifier for the request, useful for debugging.