@adcp/client API Reference - v4.19.0
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    Type Alias StandardErrorCode

    StandardErrorCode:
        | "INVALID_REQUEST"
        | "AUTH_REQUIRED"
        | "RATE_LIMITED"
        | "SERVICE_UNAVAILABLE"
        | "POLICY_VIOLATION"
        | "PRODUCT_NOT_FOUND"
        | "PRODUCT_UNAVAILABLE"
        | "PROPOSAL_EXPIRED"
        | "BUDGET_TOO_LOW"
        | "CREATIVE_REJECTED"
        | "UNSUPPORTED_FEATURE"
        | "AUDIENCE_TOO_SMALL"
        | "ACCOUNT_NOT_FOUND"
        | "ACCOUNT_SETUP_REQUIRED"
        | "ACCOUNT_AMBIGUOUS"
        | "ACCOUNT_PAYMENT_REQUIRED"
        | "ACCOUNT_SUSPENDED"
        | "COMPLIANCE_UNSATISFIED"
        | "BUDGET_EXHAUSTED"
        | "BUDGET_EXCEEDED"
        | "CONFLICT"
        | "INVALID_STATE"
        | "MEDIA_BUY_NOT_FOUND"
        | "NOT_CANCELLABLE"
        | "PACKAGE_NOT_FOUND"
        | "VALIDATION_ERROR"

    The 26 standard error codes defined in the AdCP specification. Use these for type-safe error handling in agent recovery logic.