{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://customer.io/schemas/customer-io/customer.json",
  "title": "Customer.io Customer",
  "description": "A customer profile in Customer.io representing a person in your audience with attributes, device information, and segment membership.",
  "type": "object",
  "required": ["identifiers"],
  "properties": {
    "identifiers": {
      "$ref": "#/$defs/CustomerIdentifiers"
    },
    "email": {
      "type": "string",
      "format": "email",
      "description": "The customer email address used for email messaging."
    },
    "created_at": {
      "type": "integer",
      "description": "A UNIX timestamp representing when the customer was first identified."
    },
    "anonymous_id": {
      "type": "string",
      "description": "An anonymous identifier used to associate pre-identification events with this customer."
    },
    "attributes": {
      "type": "object",
      "description": "Custom attributes on the customer profile. These can be any key-value pairs set via the Track or Pipelines APIs.",
      "additionalProperties": true
    },
    "unsubscribed": {
      "type": "boolean",
      "description": "Whether the customer has unsubscribed from marketing messages."
    },
    "devices": {
      "type": "array",
      "description": "Push notification devices associated with this customer.",
      "items": {
        "$ref": "#/$defs/Device"
      }
    },
    "segments": {
      "type": "array",
      "description": "Segments the customer belongs to.",
      "items": {
        "$ref": "#/$defs/SegmentMembership"
      }
    }
  },
  "$defs": {
    "CustomerIdentifiers": {
      "type": "object",
      "description": "Identifiers used to uniquely reference a customer in Customer.io.",
      "properties": {
        "id": {
          "type": "string",
          "description": "The primary customer identifier in your system."
        },
        "email": {
          "type": "string",
          "format": "email",
          "description": "The customer email address, which can serve as a primary identifier."
        },
        "cio_id": {
          "type": "string",
          "description": "The Customer.io internal identifier automatically assigned to each customer.",
          "pattern": "^[0-9a-f]+$"
        }
      }
    },
    "Device": {
      "type": "object",
      "description": "A push notification device associated with a customer.",
      "required": ["id", "platform"],
      "properties": {
        "id": {
          "type": "string",
          "description": "The unique device token."
        },
        "platform": {
          "type": "string",
          "description": "The device platform.",
          "enum": ["ios", "android"]
        },
        "last_used": {
          "type": "integer",
          "description": "A UNIX timestamp of when the device was last used."
        }
      }
    },
    "SegmentMembership": {
      "type": "object",
      "description": "A segment that the customer belongs to.",
      "properties": {
        "id": {
          "type": "integer",
          "description": "The segment identifier."
        },
        "name": {
          "type": "string",
          "description": "The segment name."
        }
      }
    }
  }
}