/**
 * Billing Tools - MCP Tools for Billing and Usage Management
 *
 * Provides tools for:
 * - Balance and credits
 * - Usage breakdown and cost insights
 * - Invoices
 */
import { MCPToolDefinition, MCPToolResult } from './src/types/mcp-types';
export declare const billingToolDefinitions: MCPToolDefinition[];
export declare class BillingTools {
    private static instance;
    private client;
    constructor(registryUrl: string, apiKey: string);
    static getInstance(registryUrl?: string, apiKey?: string): BillingTools;
    getTools(): MCPToolDefinition[];
    executeTool(toolName: string, args: Record<string, any>): Promise<MCPToolResult>;
    private getBalance;
    private getUsage;
    private getCostInsights;
    private listInvoices;
    private addCredits;
}
export default BillingTools;
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