export interface X402ToolOptions {
    price?: number;
    currency?: string;
    network?: string;
    receipt?: boolean;
    maxPaymentAge?: number;
    description?: string;
}
export interface PaidHandler {
    __x402: X402ToolOptions;
}
declare global {
    var __XMCP_X402_REGISTRY: Map<string, X402ToolOptions> | undefined;
}
export declare function isPaidHandler(handler: unknown): handler is PaidHandler;
export declare function getX402Registry(): Map<string, X402ToolOptions> | undefined;