SOAP Service call Issue

Sure. The National Weather Service has some information accessible via a SOAP protocol: 

The WSDL is 

When you load the endpoint into SOAPUI, you get a list of available services. The one I used is LatLonListZipcode.

Here is the sample request:

<soapenv:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ndf="https://graphical.weather.gov/xml/DWMLgen/wsdl/ndfdXML.wsdl">
   <soapenv:Header/>
   <soapenv:Body>
      <ndf:LatLonListZipCode soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
         <zipCodeList xsi:type="dwml:zipCodeListType" xmlns:dwml="https://graphical.weather.gov/xml/DWMLgen/schema/DWML.xsd">20191</zipCodeList>
      </ndf:LatLonListZipCode>
   </soapenv:Body>
</soapenv:Envelope>

and the response:

<SOAP-ENV:Envelope SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/">
   <SOAP-ENV:Body>
      <ns1:LatLonListZipCodeResponse xmlns:ns1="https://graphical.weather.gov/xml/DWMLgen/wsdl/ndfdXML.wsdl">
         <listLatLonOut xsi:type="xsd:string"><?xml version='1.0'?><dwml version='1.0' xmlns:xsd='http://www.w3.org/2001/XMLSchema' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xsi:noNamespaceSchemaLocation='https://graphical.weather.gov/xml/DWMLgen/schema/DWML.xsd'><latLonList>38.9521,-77.3452</latLonList></dwml></listLatLonOut>
      </ns1:LatLonListZipCodeResponse>
   </SOAP-ENV:Body>
</SOAP-ENV:Envelope>

Copying and pasting the request into Appian we have:

HI Josh,

My SOAP call is working correctly now, It didn't work first so I thought it was because of WS security header so I was looking into WS related appian function such as wsConfig(). It turns out I wasn't using correct 'soapAction' value. Once I have correct header it did work. Your direction was very very helpful. Thank you very much.  

The step I followed;

1. Tried to use Web Service smart node, when I test connection WSDL URL, it did throw out not a valid WSDL error message.

2. Use SOAP UI to load WSDL and select the operation that i want to user. Set required values and test the operation and confirmed it was working in SOAP UI. 

3. While SOAP UI testing, it did not required any header.

3. Copy the XML from SOAP UI and tested in Appian without header and it failed.

4. Added soapAction and content-Type header configuration it's working as expected. 

FYI, I tested with 'Web And XML Extensions' Plug in and tested it in SAIL as well and confirmed it's working in SAIL as well.

load(
local!endpoint: "payoneer--upgrade.custhelp.com/.../soap",
/* the SOAP envelope */
local!Body: "<soapenv:Envelope xmlns:soapenv=""schemas.xmlsoap.org/.../"" xmlns:v1=""urn:messages.ws.rightnow.com/v1_4"" xmlns:v11=""urn:objects.ws.rightnow.com/v1_4"" xmlns:v12=""urn:base.ws.rightnow.com/v1_4"" xmlns:v13=""urn:generic.ws.rightnow.com/v1_4"">
<soapenv:Header>
<v1:ClientInfoHeader>
<v1:AppID>IncidentResponse001.xml</v1:AppID>
</v1:ClientInfoHeader>
<wsse:Security xmlns:wsse=""docs.oasis-open.org/.../oasis-200401-wss-wssecurity-secext-1.0.xsd"" soapenv:mustUnderstand=""1"">
<wsse:UsernameToken xmlns:wsu=""docs.oasis-open.org/.../oasis-200401-wss-wssecurity-utility-1.0.xsd"" wsu:Id=""UsernameToken-3902281"">
<wsse:Username>YOURUSERNAME</wsse:Username>
<wsse:Password Type=""docs.oasis-open.org/.../oasis-200401-wss-username-token-profile-1.0
</wsse:UsernameToken>
</wsse:Security>
</soapenv:Header>
<soapenv:Body>
<v1:SendIncidentResponse>
<v1:IncidentResponse>
<v11:Incident>
<v11:PrimaryContact>
<v11:Contact>
<v12:ID id=""5518344""/>
</v11:Contact>
</v11:PrimaryContact>
<v11:Subject>This Incident for email testing E</v11:Subject>
<v11:Threads>
<v11:ThreadList action=""add"">
<v11:Channel>
<v12:Name>Email</v12:Name>
</v11:Channel>
<v11:EntryType>
<v12:ID id=""2""/>
</v11:EntryType>
<v11:MailHeader>This is mail Header for testing E</v11:MailHeader>
<v11:Text>This is test email body E</v11:Text>
</v11:ThreadList>
</v11:Threads>
</v11:Incident>
</v1:IncidentResponse>
</v1:SendIncidentResponse>
</soapenv:Body>
</soapenv:Envelope>",
local!misResponse: httppostwithresponse(
endpoint: local!endpoint,
paramNames: {},
paramValues: {},
headerNames: {"soapAction","Content-Type"},
headerValues: {"SendIncidentResponse","text/xml;charset=UTF-8"},
body: local!Body,
user: "appian_client",
password: "de@vGpp1h4tAn",
domain: null,
timeout: 25,
proxyHost: null,
proxyPort: null,
socketTimeout: 25
),

{
a!paragraphField(
readOnly: true,
value: local!misResponse
)
}

)

I could not find documents about "Web and XML extension Plug-in" on Appian.com. Would you send the links? thx.