What is SOAP API?

SOAP (Simple Object Access Protocol)

SOAP is based on transferring data as a block of XML, respecting the expected format as defined in the SOAP WSDL (Web Service Description Language) file. You will generally use a specific programming library called a SOAP client to interact with this technology, which will process the WSDL, automatically determine the API endpoints that will accept data, and pre-validate the values required for each API method.


The requests you send to the API will need to have the following parts:




Is an XML file starting with <soapenv:Envelope> and ending with </soapenv:Envelope>

Example: Create a Contact

                <!--Zero or more repetitions:-->






HTTP 200


Not necessary. Everything went well.

HTTP 401


Add authorization header.

HTTP 403


Validate user type, username, and password.

HTTP 404

Page Not Found

Provide a valid URL. Make sure no "\" in the URL.

HTTP 500

Internal Server Error

Contact Support. Server error or load too high.

Starting a new SOAPUI Project

After opening SoapUI, click on the SOAP button, to create a new “project”. This is a connection to a specific SOAP server that will then display all the methods that you can use from the SOAP WSDL URL. The “Project Name” is free text, you can name your project how you want. The Initial WSDL path is the URL to the WSDL that describes the WSDL you want to connect to. Click OK to create the project.

Start testing with SOAPUI

Import your project into SOAPUI

Add the user and password as on the picture


The WSDL file is a complex file that describes how you can interact with the web service. The file describes the web service functions (called “methods”) along with the obligatory and optional variables that the methods require, along with how the web service will respond. All data is exchanged in requests and responses in a block of XML, called an “envelope”. The Mapp Engage SOAP 2.0 v7 WSDL can be viewed under: