{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://api-evangelist.com/svix/json-schema/message.json",
  "title": "Svix Message",
  "description": "A webhook message sent to a Svix Application. Svix fans the message out to every matching endpoint and tracks each delivery as a Message Attempt.",
  "type": "object",
  "required": ["id", "eventType", "payload", "timestamp"],
  "properties": {
    "id": {
      "type": "string",
      "pattern": "^msg_[A-Za-z0-9]{27}$",
      "description": "Svix-assigned message ID."
    },
    "eventId": {
      "type": ["string", "null"],
      "minLength": 1,
      "maxLength": 256,
      "pattern": "^[a-zA-Z0-9\\-_.]+$",
      "description": "Optional client-supplied identifier."
    },
    "eventType": {
      "type": "string",
      "pattern": "^[a-zA-Z0-9\\-_.]+$",
      "maxLength": 256,
      "description": "Name of the event type, used for endpoint filtering."
    },
    "payload": {
      "type": "object",
      "description": "JSON body delivered to subscriber endpoints."
    },
    "channels": {
      "type": ["array", "null"],
      "items": {
        "type": "string",
        "pattern": "^[a-zA-Z0-9\\-_.:]+$",
        "maxLength": 128
      },
      "uniqueItems": true,
      "minItems": 1,
      "maxItems": 10
    },
    "tags": {
      "type": ["array", "null"],
      "items": {
        "type": "string",
        "pattern": "^[a-zA-Z0-9\\-_./\\\\#]+$",
        "maxLength": 128
      },
      "uniqueItems": true
    },
    "deliverAt": { "type": ["string", "null"], "format": "date-time" },
    "timestamp": { "type": "string", "format": "date-time" }
  }
}