Test custom services using raw HTTP

You will need a client id and client secret.
The client should be registered in D365F&FSC at System administration -> Setup -> Azure Active Directory applications
All requests were tested using Fiddler and its Composer -> Scratchpad feature.
You can find the implementation of the calc service following this link.
The following tools can be used to issue HTTPS requests:
  • Postman
  • Fiddler
There are a couple of examples of how you can test your services:


Make sure that empty line which dividing HTTP headers and body is empty, without space. Otherwise you will most probably get an error.

Request to get auth token:
POST https://login.windows.net/{TenantId}/oauth2/token HTTP/1.1
Content-Type: application/x-www-form-urlencoded
Host: login.windows.net

TenantId - Open D365FO / ? (Sign at top right corner) / About / Licenses / This product is licensed to

Request to service:
POST https://{aos}.cloudax.dynamics.com/api/Services/VKOServiceGroup/VKOCalcService/calc HTTP/1.1
Content-Type: application/json
Accept: application/json
Accept-Charset: UTF-8
Authorization: Bearer {AuthToken}
Host: {aos}.cloudax.dynamics.com

         "arg1": 2,
         "arg2": 2,
         "operation": 0,
         "list": [{
             "a": 0,
             "a": 1,
         "subCalc": {
             "a": 5


SoapUI can form a correct request for you using wsdl https://{aos}.cloudax.dynamics.com/soap/Services/VKOServiceGroup?wsdl
You can use SoapUI to send request, you just need to manually add Authorization header with value Bearer {AuthToken}

Example of SOAP request:
POST https://{aos}.cloudax.dynamics.com/soap/services/VKOServiceGroup HTTP/1.1
Content-Type: text/xml
SOAPAction: http://tempuri.org/Calc/calc
Authorization: Bearer {AuthToken}
Host: {aos}.cloudax.dynamics.com

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:dat="http://schemas.microsoft.com/dynamics/2013/01/datacontracts" xmlns:tem="http://tempuri.org" xmlns:dyn="http://schemas.datacontract.org/2004/07/Dynamics.AX.Application">
SOAPAction: http://tempuri.org/{External Name property from service}/calc






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