{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://aws.amazon.com/eventbridge/schemas/event.json",
  "title": "Amazon EventBridge Event",
  "description": "JSON Schema for the standard Amazon EventBridge event envelope. All events delivered through EventBridge conform to this structure.",
  "type": "object",
  "properties": {
    "version": {
      "type": "string",
      "description": "By default, this is set to 0 (zero) in all events.",
      "const": "0"
    },
    "id": {
      "type": "string",
      "format": "uuid",
      "description": "A unique identifier for the event, generated by EventBridge for each event."
    },
    "detail-type": {
      "type": "string",
      "description": "Identifies, in combination with the source field, the fields and values that appear in the detail field."
    },
    "source": {
      "type": "string",
      "description": "Identifies the service or application that generated the event. All events originating from AWS services begin with aws."
    },
    "account": {
      "type": "string",
      "pattern": "^[0-9]{12}$",
      "description": "The 12-digit number identifying an AWS account."
    },
    "time": {
      "type": "string",
      "format": "date-time",
      "description": "The event timestamp, which can be specified by the service originating the event."
    },
    "region": {
      "type": "string",
      "description": "Identifies the AWS region where the event originated.",
      "examples": [
        "us-east-1",
        "us-west-2",
        "eu-west-1",
        "ap-southeast-1"
      ]
    },
    "resources": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "A JSON array containing ARNs that identify resources that are involved in the event."
    },
    "detail": {
      "type": "object",
      "description": "A JSON object that contains information about the event. The service generating the event determines the content of this field.",
      "additionalProperties": true
    }
  },
  "required": [
    "version",
    "id",
    "detail-type",
    "source",
    "account",
    "time",
    "region",
    "resources",
    "detail"
  ],
  "additionalProperties": false,
  "examples": [
    {
      "version": "0",
      "id": "12345678-1234-1234-1234-123456789012",
      "detail-type": "EC2 Instance State-change Notification",
      "source": "aws.ec2",
      "account": "123456789012",
      "time": "2023-10-01T12:00:00Z",
      "region": "us-east-1",
      "resources": [
        "arn:aws:ec2:us-east-1:123456789012:instance/i-1234567890abcdef0"
      ],
      "detail": {
        "instance-id": "i-1234567890abcdef0",
        "state": "running"
      }
    }
  ]
}