Event catalog

Market availability: US only

The Event catalog lists the performance webhook events you can subscribe to. Each event is delivered as a machine-readable HTTP POST with a shared delivery format. Use this page to compare events quickly and jump to their detailed guides.

Events at a glance

Event type	Display name	Purpose	Common actions
`SELLER_PERFORMANCE_NOTIFICATIONS`	`ALARMS`	Shipping risks and actions triggered by seller activity	Generate tasks, prioritize fulfillment
`SELLER_PERFORMANCE_NOTIFICATIONS`	`REPORT`	Weekly KPI rollup across standards	Trend performance

Delivery format

All performance events use the same top-level fields. The envelope identifies the event and carries an event-specific payload.

{ "source": { "eventType": "SELLER_PERFORMANCE_NOTIFICATIONS", "eventTime": "ISO 8601 timestamp", "eventId": "UUID" }, "payload": {}
}

Notification type snapshots

Notification type: `ALARMS`

Summary
Shipping risks and actions triggered by seller activity.

Timing: Triggered based on seller activity; delivery timing may vary. Notifications are not delivered on a fixed schedule.
Key fields: ordersApiUrl, enNotification.alarms[] with alarmType, orderCount, action, poNumbers.
Guide: Seller performance alarms

Payload snapshot

{ "partnerId": "123456789", "lastRefreshTs": "2025-09-10 12:52:36 UTC", "ordersApiUrl": "https://developer.walmart.com/", "moreInfoLink": "https://marketplacelearn.walmart.com/guides/Policies%20&%20standards/Performance/Performance-alarms", "supportedLanguages": [
"en-US"
], "notificationType": "ALARMS", "enNotification": { "summary": "We have identified 100 orders that need your immediate attention.", "message": "For information on all the orders, use the Orders API link.", "alarms": [ { "alarmType": "LateOriginScan", "orderCount": 5, "poNumbers": ["123", "456"] }, { "alarmType": "AutoCancelledWarning", "orderCount": 5, "poNumbers": ["123", "456"] } ] }
}

Notification type: `REPORT`

Summary
Weekly KPI rollup across standards. Use it to trend performance and plan coaching.

Timing: 5:00 AM PT Mondays.
Key fields: enNotification.metrics[] with kpi, score, performanceStandard, overallTrend, performanceRiskLevel, duration, developerPortalApiLink. The Returns KPI can also include condTypeMetrics[] with condition-specific metrics.
Trend values
Each KPI includes overallTrend to indicate direction versus the standard and prior period.
GREEN_UP, GREEN_DOWN, NEUTRAL, RED_UP, RED_DOWN. Refer to Seller performance report for meanings and example thresholds.
Risk levels
Each KPI includes performanceRiskLevel with one of Good, Monitor, or Urgent. Refer to Seller performance report for meanings and example thresholds.
Guide: Seller performance report

Payload snapshot

{ "partnerId": "10000000140", "lastRefreshTs": "2026-09-30 15:01:39 UTC", "moreInfoLink": "https://marketplacelearn.walmart.com/guides/Policies%20&%20standards/Performance/Seller-performance-standards?locale=en-US", "supportedLanguages": [ "en-US" ], "notificationType": "REPORT", "enNotification": { "summary": "Here is the summary of your Walmart performance.", "message": "For order-level details use the API link provided.", "metrics": [ { "kpi": "On-time delivery", "score": 97.96, "overallTrend": "RED_DOWN", "performanceStandard": "90% or above", "performanceRiskLevel": "Good", "duration": "30 days" }, { "kpi": "Returns", "score": 3.02, "overallTrend": "NEUTRAL", "performanceStandard": "6% or below", "performanceRiskLevel": "Good", "duration": "60 days", "developerPortalApiLink": "https://developer.walmart.com/us-marketplace/reference/getreturnreport", "condTypeMetrics": [ { "score": 3.02, "overallTrend": "NEUTRAL", "performanceStandard": "6% or below", "performanceRiskLevel": "Good", "duration": "60 days", "developerPortalApiLink": "https://developer.walmart.com/us-marketplace/reference/getreturnreport", "condType": "NEW" }, { "score": 0, "overallTrend": "NEUTRAL", "performanceStandard": "9% or below", "performanceRiskLevel": "Good", "duration": "60 days", "developerPortalApiLink": "https://developer.walmart.com/us-marketplace/reference/getreturnreport", "condType": "RESOLD" } ] } ] }
}

Next steps

Subscribe or update endpoints: Subscribe to the performance webhook
Set up your performance webhook endpoint: Set up your Performance webhook endpoint
Validate in sandbox: Test in sandbox

Reference guide

This catalog lists available performance events and links to their payload schemas and examples.

Get event types: Lists available notification event types, versions, and the required resource value.

Updated about 15 hours ago

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