To find if there is any scripted inbound web service written for incident creation on the incident table in ServiceNow, you can follow these steps:

1. Login to your ServiceNow instance.
2. Navigate to "System Web Services" > "Inbound" > "Scripted Web Services".
3. In the list of scripted web services, look for any service that is related to the incident creation. You can do this by checking the 'Name' or 'Description' fields of the services.
4. Once you find a potential match, click on it to open the detailed view.
5. In the detailed view, check the 'Script' field. This is where the actual code for the web service is written. Look for any code that is related to incident creation, such as creating a new record in the incident table.
6. If you find such code, then there is a scripted inbound web service for incident creation. If not, then there isn't one.

Please note that this method only works if the web service was created as a 'Scripted Web Service'. If the web service was created using another method (such as a REST API), you will need to look in a different location.

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