How can I create ODATA service in webMethods IS 9.12 to call external URL? Any configuration?

I want to import the Odata structure from the response as well.

If you have the webMethods CloudStreams module, it has two providers for this purpose:

https://techcommunity.softwareag.com/ecosystem/communities/public/webmethods/products/cloudstreams/downloads/OData4.0/index.html

http://techcommunity.softwareag.com/ecosystem/communities/public/webmethods/products/cloudstreams/downloads/OData2.0/index.html

My company doesn’t own CloudStreams, so I have never tried the above

However, we do consume several OData services, using standard services. OData is really a specific form of REST, so you can consume it like any other REST service. E.g calls to these services:

pub.client:http
pub.json:jsonStreamToDocument

If you want a “strongly typed” IS documents for the responses, you can create the document from a sample JSON file in Designer