You can set up data quality policy rules that use a web service.
You can use a web service:
Validation rule to validate if a field value matches a value in another internal or external source, using a web service.
Enrichment rule to get a field value from another internal or external source, using a web service, and set this value in the target field of the enrichment rule.
Before you can set up a web service rule, set up the web service configuration to be used.