Webhook Notification Payload

When an event or market is opened or closed, all registered webhooks receive an HTTP POST with the following JSON body.

Payload Schema

Field	Type	Description
`type`	`string`	Always `"event_status_notification"`
`eventId`	`string`	The event ID
`eventTitle`	`string`	Event title
`marketId`	`string?`	Market ID (present when `eventStatusScope` is `"Market"`)
`marketQuestion`	`string?`	Market question text
`outcomes`	`string?`	JSON-encoded outcomes array (present on close)
`outcomePrices`	`string?`	JSON-encoded outcome prices (present on close)
`polymarketSlug`	`string`	Polymarket event slug
`eventStatusScope`	`string`	`"Event"` or `"Market"`
`triggerType`	`string`	`"Open"` or `"Closed"`
`detectedAt`	`string`	ISO 8601 timestamp of detection

Example Payload

{
  "type": "event_status_notification",
  "eventId": "123",
  "eventTitle": "Will X happen?",
  "marketId": "market-abc",
  "marketQuestion": "Will X happen by June?",
  "outcomes": "[\"Yes\", \"No\"]",
  "outcomePrices": "[0.65, 0.35]",
  "polymarketSlug": "will-x-happen",
  "eventStatusScope": "Market",
  "triggerType": "Closed",
  "detectedAt": "2026-03-01T14:30:00.000Z"
}

Delivery Details

Method: HTTP POST
Content-Type: application/json
User-Agent: NevuaMarkets-Webhook/1.0
Timeout: 5 seconds per attempt
Retries: Up to 3 attempts (1 second apart)

Your webhook endpoint should respond with a 2xx HTTP status code within 5 seconds to indicate successful receipt.

​Payload Schema

​Example Payload

​Delivery Details

Payload Schema

Example Payload

Delivery Details