# Environment variable schema Model API Reference (Environment Variables) (/api-reference/environment-variables/environment-variable-schema)

Reference the Novu environment variable schema used in API requests and responses. Review fields, data types, and object structure for this resource.

### Environment Variable

Environment variable is a named value you define once in the dashboard and reuse across workflows. Each [Novu environment](/platform/developer/environments) can hold its own value for the same variable, so Development and Production (and any custom environments) stay isolated without duplicating workflow logic. Read more about environment variables on [environment variables documentation page](/platform/developer/environment-variables).

<TypeTable
  name="EnvironmentVariable"
  type={{
"id": {
  "description": "",
  "type": "string"
},
"organizationId": {
  "description": "",
  "type": "string"
},
"key": {
  "description": "",
  "type": "string"
},
"type": {
  "description": "",
  "type": "\"string\""
},
"isSecret": {
  "description": "",
  "type": "boolean"
},
"values": {
  "description": "",
  "type": "EnvironmentVariableValueResponseDto[]"
},
"createdAt": {
  "description": "",
  "type": "string"
},
"updatedAt": {
  "description": "",
  "type": "string"
}
}}
/>