Third-party sources

Snowplow provides tracking integrations that let you capture data from third-party tools deployed on your web and mobile properties.

Optimizely X

The Optimizely X web plugin captures experiment and variation data from Optimizely A/B tests. The tracker will add it to all tracked events as an entity.

This table shows the support for Optimizely X tracking across the main client-side Snowplow tracker SDKs:

Tracker	Supported	Since version	Auto-tracking	Notes
Web	✅	3.0.0	✅	Requires Optimizely X plugin
iOS	❌
Android	❌
React Native	❌
Flutter	❌
Roku	❌
Google Tag Manager	❌

summary

Entity

Schema for Optimizely X experiment context

Schema URIiglu:com.optimizely.optimizelyx/summary/jsonschema/1-0-0

Example

json

{
  "experimentId": 12345,
  "variationName": "Variation A",
  "variationId": 67890,
  "isActive": true
}

Properties and schema

Table

Property	Description
experimentId integer	Optional. The Optimizely experiment ID
variationName string	Optional. The variation name (requires privacy setting)
variationId integer	Optional. The variation ID
isActive boolean	Optional. Whether the experiment is active

JSON schema

json

{
  "$schema": "http://iglucentral.com/schemas/com.snowplowanalytics.self-desc/schema/jsonschema/1-0-0#",
  "description": "Schema for Optimizely X experiment context",
  "self": {
    "vendor": "com.optimizely.optimizelyx",
    "name": "summary",
    "format": "jsonschema",
    "version": "1-0-0"
  },
  "type": "object",
  "properties": {
    "experimentId": {
      "type": [
        "integer",
        "null"
      ],
      "description": "The Optimizely experiment ID"
    },
    "variationName": {
      "type": [
        "string",
        "null"
      ],
      "description": "The variation name (requires privacy setting)"
    },
    "variationId": {
      "type": [
        "integer",
        "null"
      ],
      "description": "The variation ID"
    },
    "isActive": {
      "type": [
        "boolean",
        "null"
      ],
      "description": "Whether the experiment is active"
    }
  },
  "additionalProperties": true
}

Google Analytics cookies

The GA cookies web plugin captures Google Analytics cookie values (both GA4 and Universal Analytics) and attaches them to all events.

This table shows the support for GA cookie tracking across the main client-side Snowplow tracker SDKs:

Tracker	Supported	Since version	Auto-tracking	Notes
Web	✅	3.0.0	✅	Requires GA cookies plugin
iOS	❌
Android	❌
React Native	❌
Flutter	❌
Roku	❌
Google Tag Manager	❌

The entity schema depends on whether the tracker finds GA4 or Universal Analytics cookies.

GA4 schema:

cookies

Entity

Schema for GA4 cookies context

Schema URIiglu:com.google.ga4/cookies/jsonschema/1-0-0

Example

json

{
  "_ga": "G-1234",
  "cookie_prefix": "prefix",
  "session_cookies": [
    {
      "measurement_id": "G-1234",
      "session_cookie": "567"
    }
  ]
}

Properties and schema

Table

Property	Description
_ga string	Optional. The _ga cookie value
cookie_prefix string	Optional. The cookie prefix if configured
session_cookies array	Optional. Session cookie values by measurement ID

JSON schema

json

{
  "$schema": "http://iglucentral.com/schemas/com.snowplowanalytics.self-desc/schema/jsonschema/1-0-0#",
  "description": "Schema for GA4 cookies context",
  "self": {
    "vendor": "com.google.ga4",
    "name": "cookies",
    "format": "jsonschema",
    "version": "1-0-0"
  },
  "type": "object",
  "properties": {
    "_ga": {
      "type": "string",
      "description": "The _ga cookie value"
    },
    "cookie_prefix": {
      "type": [
        "string",
        "null"
      ],
      "description": "The cookie prefix if configured"
    },
    "session_cookies": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "measurement_id": {
            "type": "string"
          },
          "session_cookie": {
            "type": "string"
          }
        }
      },
      "description": "Session cookie values by measurement ID"
    }
  },
  "additionalProperties": false
}

Universal Analytics schema:

cookies

Entity

Schema for Universal Analytics cookies context

Schema URIiglu:com.google.analytics/cookies/jsonschema/1-0-0

Example

json

{
  "_ga": "GA1.2.3.4"
}

Properties and schema

Table

Property	Description
_ga string	Optional. The _ga cookie value
__utma string	Optional. Classic GA cookie
__utmb string	Optional. Classic GA cookie
__utmc string	Optional. Classic GA cookie
__utmv string	Optional. Classic GA cookie
__utmz string	Optional. Classic GA cookie

JSON schema

json

{
  "$schema": "http://iglucentral.com/schemas/com.snowplowanalytics.self-desc/schema/jsonschema/1-0-0#",
  "description": "Schema for Universal Analytics cookies context",
  "self": {
    "vendor": "com.google.analytics",
    "name": "cookies",
    "format": "jsonschema",
    "version": "1-0-0"
  },
  "type": "object",
  "properties": {
    "_ga": {
      "type": [
        "string",
        "null"
      ],
      "description": "The _ga cookie value"
    },
    "__utma": {
      "type": [
        "string",
        "null"
      ],
      "description": "Classic GA cookie"
    },
    "__utmb": {
      "type": [
        "string",
        "null"
      ],
      "description": "Classic GA cookie"
    },
    "__utmc": {
      "type": [
        "string",
        "null"
      ],
      "description": "Classic GA cookie"
    },
    "__utmv": {
      "type": [
        "string",
        "null"
      ],
      "description": "Classic GA cookie"
    },
    "__utmz": {
      "type": [
        "string",
        "null"
      ],
      "description": "Classic GA cookie"
    }
  },
  "additionalProperties": false
}

Kantar Focal Meter

Some Snowplow trackers integrate with Kantar Focal Meter, a router-based audience measurement system. The plugin sends user IDs to Focal Meter endpoints to enable content audience measurement.

This integration sends data to Kantar's endpoint, rather than attaching an entity to events.

This table shows the support for Kantar Focal Meter tracking across the main client-side Snowplow tracker SDKs:

Tracker	Supported	Since version	Auto-tracking	Notes
Web	✅	3.16.0	✅	Requires Focal Meter plugin
iOS	✅	5.6.0	❌
Android	✅	5.6.0	❌
React Native	❌
Flutter	❌
Roku	❌
Google Tag Manager	❌

Privacy Sandbox (deprecated)

warning

Privacy Sandbox has been deprecated by Google. This plugin remains available but the underlying browser API may no longer be supported.

The Privacy Sandbox plugin captures data from the Topics API, which was designed to provide privacy-preserving interest-based advertising signals.

This table shows the support for Privacy Sandbox tracking across the main client-side Snowplow tracker SDKs.

Tracker	Supported	Since version	Auto-tracking
Web	✅	3.14.0	✅
iOS	❌
Android	❌
React Native	❌
Flutter	❌
Roku	❌
Google Tag Manager	❌

topics

Entity

Schema for Privacy Sandbox Topics context

Schema URIiglu:com.google.privacysandbox/topics/jsonschema/1-0-0

Example

json

{
  "topics": [
    {
      "topic": 123,
      "taxonomyVersion": "1",
      "modelVersion": "2"
    }
  ]
}

Properties and schema

Table

Property	Description
topics array	Optional. List of topics for the current user

JSON schema

json

{
  "$schema": "http://iglucentral.com/schemas/com.snowplowanalytics.self-desc/schema/jsonschema/1-0-0#",
  "description": "Schema for Privacy Sandbox Topics context",
  "self": {
    "vendor": "com.google.privacysandbox",
    "name": "topics",
    "format": "jsonschema",
    "version": "1-0-0"
  },
  "type": "object",
  "properties": {
    "topics": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "topic": {
            "type": "integer"
          },
          "taxonomyVersion": {
            "type": "string"
          },
          "modelVersion": {
            "type": "string"
          }
        }
      },
      "description": "List of topics for the current user"
    }
  },
  "additionalProperties": false
}