{"service":"Alert/Webhook Service","version":"1.0.0","status":"running","endpoints":{"webhook":"POST|GET /{identifier}/{alert_identifier}?key={user_key}","notifications":"GET /notifications/{identifier}/{alert_identifier}?key={user_key}&limit=N","websocket":"WS /ws/{identifier}/{alert_identifier}?key={user_key}","health":"GET /health","metrics":"GET /metrics"},"notes":{"identifier":"user_id (usr_...) or handle","alert_identifier":"alert_id (al_...) or short_url","user_key":"user's key (required)"}}