/**
 * x402.ts — x402_pay tool.
 *
 * Fetches a URL, automatically handling 402 Payment Required responses
 * by paying with the Agent Wallet and retrying the request.
 *
 * v1.1.0: Auto-session detection. If an active x402 V2 session covers the
 * requested URL, session headers are injected and no new payment is made.
 * Pass skip_session_check=true to skip x402 V2 session reuse and take the
 * payment path. Identical paid retries still replay from the spend-intent
 * cache; use a new idempotencyKey for a second settlement.
 */
import { z } from 'zod';
export declare const X402PaySchema: z.ZodObject<{
    url: z.ZodPipe<z.ZodString, z.ZodString>;
    method: z.ZodDefault<z.ZodOptional<z.ZodEnum<{
        GET: "GET";
        POST: "POST";
        PUT: "PUT";
        PATCH: "PATCH";
        DELETE: "DELETE";
    }>>>;
    headers: z.ZodOptional<z.ZodRecord<z.ZodString, z.ZodString>>;
    body: z.ZodOptional<z.ZodString>;
    max_payment_eth: z.ZodOptional<z.ZodString>;
    timeout_ms: z.ZodDefault<z.ZodOptional<z.ZodNumber>>;
    skip_session_check: z.ZodDefault<z.ZodOptional<z.ZodBoolean>>;
    idempotencyKey: z.ZodOptional<z.ZodString>;
}, z.core.$strip>;
export type X402PayInput = z.infer<typeof X402PaySchema>;
export declare const x402PayTool: {
    name: string;
    description: string;
    inputSchema: {
        type: "object";
        properties: {
            url: {
                type: string;
                description: string;
            };
            method: {
                type: string;
                enum: string[];
                description: string;
                default: string;
            };
            headers: {
                type: string;
                additionalProperties: {
                    type: string;
                };
                description: string;
            };
            body: {
                type: string;
                description: string;
            };
            max_payment_eth: {
                type: string;
                description: string;
            };
            timeout_ms: {
                type: string;
                description: string;
                default: number;
            };
            skip_session_check: {
                type: string;
                description: string;
                default: boolean;
            };
            idempotencyKey: {
                description: string;
                type: "string";
                minLength: number;
                maxLength: number;
                pattern: string;
            };
        };
        required: string[];
    };
};
export declare function handleX402Pay(input: X402PayInput): Promise<{
    content: Array<{
        type: 'text';
        text: string;
    }>;
    isError?: boolean;
}>;
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