I am trying to create the web service to receive messages from the garmin gateway, how do I configure the url of my service in garmin services?
Sorry, I misunderstood your question but I believe you're referring to embedding your inReach data on a third party website. For assistance with this, please reference the article from our Support Center, Embedding inReach Data on a Third Party Website. For help with the IPC Outbound specifically, there's a link in that article that opens up a PDF guide with lots of information you may find helpful.
Please review the information on the IPC (inReach Portal Connect) to have data stream from our web service to the one you develop.
The inReach Portal Connect API can programmatically receive or send information to an inReach device.
1 Use of this API is limited to Professional accounts only.