I am still working on Appian to JIRA integration. I have made some progress in

I think your queryParameter should actually be something like:

a!httpQueryParameter(
          name: "data"
          value: "{""body"": ""Adding a comment to this issue""}"
)

Sorry, I missed a comma after the "data" part:

a!httpQueryParameter(
          name: "data",
          value: "{""body"": ""Adding a comment to this issue""}"
)

No luck with this code either. Here is the code snipped that I use for the query:
index(index(a!httpQuery(
method:"GET",
url: "sni-digital-dev.atlassian.net/.../project
           queryParameters: {
/* a!httpQuery will automatically url-encode query parameters for you,
* so it's OK to include spaces in the value of a query parameter */
a!httpQueryParameter(name: "jql", value: {""}),
                    },
basicAuthenticationCredentials:a!httpAuthenticationBasic(
username:a!scsField( externalSystemKey:"test", fieldKey:"username", usePerUser:false()),
password:a!scsField( externalSystemKey:"test", fieldKey:"password", usePerUser:false()),
preemptive:true()
)
),"result",{}),"body",{}),

Not exactly sure what you're trying to do there, but I guess you're trying to use this call: docs.atlassian.com/.../ ...?

If so, it should probabaly look a bit like this - I'm not sure exactly what the expanded field names should be so I've just put in "name" for now. also the user will need some projects, otherwise presumably you'll get an empty result.

a!httpQuery(
method: "GET",
url: "sni-digital-dev.atlassian.net/.../project",
queryParameters: {
/* a!httpQuery will automatically url-encode query parameters for you,
* so it's OK to include spaces in the value of a query parameter */a!httpQueryParameter(
name: "expand",
value: "name"
)
},
basicAuthenticationCredentials: a!httpAuthenticationBasic(
username: a!scsField(
externalSystemKey: "test",
fieldKey: "username",
usePerUser: false()
),
password: a!scsField(
externalSystemKey: "test",
fieldKey: "password",
usePerUser: false()
),
preemptive: true()
)
)

Hi,
I also want to use third party credentials for REST API,but getting error in connection..
a!httpQuery(
url:"http://SERVER_NAME/locations",
method :"GET",
basicAuthenticationCredentials : a!httpAuthenticationBasic(
           username : a!scsField(
           externalSystemKey : "externalSystemKey",
           fieldKey : "usernameKey" ),
           password : a!scsField(
           externalSystemKey : "ExternalSystemKey",
           fieldKey : "passwordKey"
)))
Error :[success:false,result:,error:[code:[category:0,namespace:1,detail:0],title:HTTP error connecting to SERVER_NAME/.../1.1 401 Unauthorized,detail:No details available]]
Please let me know how to resolve this?

Sounds like you are not authenticating properly. Is this all of your code?

Yes,Code is same ,we can not provide actual value for URL. On Admin console page Third party credentials have been set.
Do we need to provide any value in header part?

I did not have to provide that information. Not having the url could be a problem. Are you planning on passing it as a variable paramter? One thing I found helpful with getting my query working is using the browser to test the query before I put it in Appian. I will attach the browser test link and the corresponding Appian code snipet in an attachment.

JIRA Testing.txt

Sorry I missing part of the code.

JIRA Testing.txt

In below code you can find url, but we can't provide you server name,One more thing same credentials are working with httpget() function.
a!httpQuery(
url:"SERVERNAME:85/.../
method :"GET",
basicAuthenticationCredentials : a!httpAuthenticationBasic(
username: a!scsField(
externalSystemKey: "testWebAPI",
fieldKey: "username",
usePerUser :false()
),
password: a!scsField(
externalSystemKey: "testWebAPI",
fieldKey: "password",
usePerUser :false()
)
),
preemptive :true()

)