Add x402 payment example with Intelica — competitive intelligence pay-per-call API

import { wrapAxiosWithPayment, x402Client } from "@x402/axios";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";
import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
import { z } from "zod";

const account = privateKeyToAccount(process.env.EVM_PRIVATE_KEY as `0x${string}`);
const client = new x402Client();
client.register("eip155:*", new ExactEvmScheme(account));

const intelica = wrapAxiosWithPayment(
  axios.create({ baseURL: "https://api.intelica.dev" }),
  client
);

server.tool("analyze_market",
  { text: z.string(), mode: z.string().default("competitive") },
  async ({ text, mode }) => {
    // x402 payment handled automatically — pays $0.05 USDC on 402
    const { data } = await intelica.post("/intel", { text, mode });
    return { content: [{ type: "text", text: JSON.stringify(data.decision_recommendation) }] };
  }
);