I am trying to follow this example

At a guess, the response you're getting does not contain an element of body. Try running the below in an expression rule and paste the result here so we can see what's wrong.

a!httpQuery(
/* Details about the Yahoo! Weather API can be found at: developer.yahoo.com/.../ */
url: "query.yahooapis.com/.../yql",
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: "q",
value: "select * from weather.forecast where woeid = 2514815"
),
a!httpQueryParameter(
name: "format",
value: "json"
),
a!httpQueryParameter(
name: "env",
value: "store"
)
}
)

Could not display interface. Please check definition and inputs.
Interface Definition: Not a valid component. Received: [success:false,result:,error:[code:[category:0,namespace:1,detail:0],title:Error Calling httpQuery,message:Failed to connect to query.yahooapis.com/.../yql,detail:Connect to query.yahooapis.com:443 [query.yahooapis.com/98.137.200.255] failed: Connection refused],@attributes:[@anyAttribute:[_dirty:false,_bannerText:,_refresh:]]]

Looks like Appian is not able to connect to the URL that's being requested - this could be due to network restrictions on your Appian instance so I'd check with whoever is responsible for the Appian server.

okay. Thank you Phil

No problem!

Can you tell me how to send url embedded parameters in a Rest Call?
I have the following URL : https:/my/path/{id}
I need to pass id as a parameter from Appian.

That very much depends on the format of the parameters - are they JSON-based or just query parameters? If they are the latter then follow the example below, noting how the a!httpQueryParameter() function is used: forum.appian.com/.../Connector_Functions.html

The parameters are JSON Based to send url embedded parameters? Can we send CDT as request body for REST call?

From m y understanding, you can use a!toJson function to convert cdt to json string

Cant I send CDT as post parameters? How to send this converted cdt as post parameter?