> ## Documentation Index > Fetch the complete documentation index at: https://openrouter.ai/docs/llms.txt > Use this file to discover all available pages before exploring further. # KeyAssignment ## Fields | Field | Type | Required | Description | Example | | ------------- | --------- | -------------------- | ----------------------------------------------------- | ---------------------------------------------------------------- | | `AssignedBy` | `*string` | :heavy\_check\_mark: | User ID of who made the assignment | user\_abc123 | | `CreatedAt` | `string` | :heavy\_check\_mark: | ISO 8601 timestamp of when the assignment was created | 2025-08-24T10:30:00Z | | `GuardrailID` | `string` | :heavy\_check\_mark: | ID of the guardrail | 550e8400-e29b-41d4-a716-446655440001 | | `ID` | `string` | :heavy\_check\_mark: | Unique identifier for the assignment | 550e8400-e29b-41d4-a716-446655440000 | | `KeyHash` | `string` | :heavy\_check\_mark: | Hash of the assigned API key | c56454edb818d6b14bc0d61c46025f1450b0f4012d12304ab40aacb519fcbc93 | | `KeyLabel` | `string` | :heavy\_check\_mark: | Label of the API key | prod-key | | `KeyName` | `string` | :heavy\_check\_mark: | Name of the API key | Production Key |