Point the Product Information System's stock sync at this endpoint. Requests must carry the shared secret; the endpoint refuses everything else.

Have the Product Information System POST current stock here whenever inventory changes. Out-of-stock SKUs pause their matching campaigns; restocked SKUs resume them. This runs silently — no Lark alert is sent.

curl -X POST "https://dailytracker.seagull.to/api/webhooks/stock-sync" \
  -H "x-webhook-secret: $AUTOMATION_SECRET" \
  -H "Content-Type: application/json" \
  -d '{
    "items": [
      { "sku": "SG-RC18", "name": "Rice Cooker 1.8L", "stock": 0 },
      { "sku": "SG-SOY",  "name": "Soy Milk Maker",   "stock": 25 }
    ],
    "dryRun": true
  }'

Send "dryRun": true first — it reports exactly what would change without touching a single live campaign.

Sends today's account-wide spend, results, CTR, CPC and top campaigns to Lark as a card. Add ?preview=1 to inspect the JSON without sending. Wire it to a scheduler for a daily push.

# send today's report now
curl -X POST "https://dailytracker.seagull.to/api/lark/daily-report" -H "x-webhook-secret: $AUTOMATION_SECRET"

# preview only (no send)
curl "https://dailytracker.seagull.to/api/lark/daily-report?preview=1&secret=$AUTOMATION_SECRET"