Following events without webhooks#

NeedUse
Know whether a credential is still valid, and how often it was scannedGET /verification/status?public_id=… — see Verification API
See recent integration activity for your accountGET /activity?limit=…
Get KPIs for a periodGET /statistics?from=…&to=…&granularity=…
React to a revocationPoll /verification/status for the credentials you care about, at a frequency compatible with the rate limit (120 requests per 10 minutes per token)

Batch your polling and cache results: a document's status rarely changes, and the public verification page always shows the current state to verifiers regardless of your integration.