https://community.appian.com/discussions/f/integrations/10870/calling-a-appian-web-api-from-appian-itselfHi All, We have created a web API in Appian and trying to call the same from a!httpQuery function in an expression. It is giving an authentication error as expected. Can someone please suggest how we could add the authentication bit. Do we needen-USTelligent Community 12https://community.appian.com/thread/47538?ContentTypeID=1Sat, 12 Aug 2017 10:25:40 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:6cb64576-a173-463d-8ae8-662d1688f35eHarsha Sharma<p>Hi Hitesh, for this you have to set up the authentication credential in the admin console and then use a!scsField() to retrieve the same. &nbsp;Links for related documentation:</p> <p><a title="Secure Credential Store" href="https://forum.appian.com/suite/help/7.11/Secure_Credentials_Store.html" target="_blank">https://forum.appian.com/suite/help/7.11/Secure_Credentials_Store.html</a></p> <p><a title="a!httpQuery" href="https://forum.appian.com/suite/help/7.11/Connector_Functions.html#a!httpQuery.28.29" target="_blank">https://forum.appian.com/suite/help/7.11/Connector_Functions.html#a!httpQuery.28.29</a></p> <p><a title="a!httpAuthenticationBasic" href="https://forum.appian.com/suite/help/7.11/Connector_Functions.html#a!httpAuthenticationBasic.28.29" target="_blank">https://forum.appian.com/suite/help/7.11/Connector_Functions.html#a!httpAuthenticationBasic.28.29</a></p> <p><a title="a!scsField" href="https://forum.appian.com/suite/help/7.11/Connector_Functions.html#a!scsField.28.29" target="_blank">https://forum.appian.com/suite/help/7.11/Connector_Functions.html#a!scsField.28.29</a></p> <p>Hope this helps.</p><div style="clear:both;"></div>