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First of all create a third party credential, and before I proceed further, I would like to know, which method are using for API like GET or POST

I am using POST method.

Well, there is a Shared Component named as Send HTTP Request Plug-in at following URL:
forum.appian.com/.../summary

This contains a function named as httpPost() which will allow you to call a WEB-API having POST method, also try creating a Third-Party credentials from Appian Admin Console as you need to pass it while calling API for authentication/Authorization sake

This function will have several inputs such as endpoint, paramValues, headerNames, headerValues etc.. which you will be needed to pass, here endpoint is nothing but your API url

try this, let me know it any help needed

@chitrarekhas Have a look into this snapshot, i created a API which i tried to access using httpPost() which works well, you can have a bit of modification (like paramName, Values, endpoint etc..) and you can get the response out from API


Hope this will help you...

Hi Alok, When I click on Test Connection, I am able to get the output in Web API, its working fine. I created a rule to call that web API with the syntax you provided, but I am getting some unexpected result as attached.

httpResponse.html

@chitrarekhas can you test the service using SOAPUI, check whether the response is coming as expected or getting the same issue.

Let me know the response which you are getting using SOAPUI

Follow this screenshot to configure SOAPUI Post Request

Hi Alok, Same message displayed in SOAP UI.

Hi Chitra, That means there is no issue in your Expression rule which has httpPost() to call the Web-API, generally Status Code 200 indicates that everything is OK, please cross check the Web-API by clicking on Test button of API whether it's returning the body content or not, because in above attached HTML file, we are able to see that its returning empty Body response

Can you share the screenshot of Web-API, after Test Button clicked, what is it returning into it's response body, also try to use httpPost() as this attached sample