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Mercury X402 MCP Server

@mercuryx402

リポジトリ

基本情報

カテゴリ

データと分析

トランスポート

stdio

作者

mercuryx402

投稿者

mercuryx402

Mercury X402 MCP Server について

Mercury is a pay-per-call MCP server that lets AI agents discover and call financial data tools using the x402 HTTP payment protocol. 18 tools covering crypto prices, DeFi liquidity, NFT data, on-chain analytics, and more. tools/list is free — tools/call is billed per call using

#crypto#defi#x402#payments#financial-data#nft#blockchain#web3

Mercury X402 MCP Server の設定

以下の設定を使って、このサーバーを MCP 対応クライアントに追加してください。

{
  "mcpServers": {
    "mercury-x402-mcp": {
      "command": "npx",
      "args": [
        "mercury-x402-mcp"
      ]
    }
  }
}

Mercury X402 MCP Server のツール

ツール一覧はまだありません

この掲載には表示できるツール一覧がまだありません。サーバーにツールがないという意味ではありません。対応機能はプロジェクトのドキュメントをご確認ください。

上のボタンで一時的なサンドボックスでこのサーバーを実行し、ツール一覧を取得できます。

概要

What is Mercury X402 Mcp?

Mercury X402 Mcp is an agent-to-agent storefront that sells digital services over HTTP 402. An AI agent discovers what's for sale, pays with its own wallet on Base mainnet in real USDC, and receives the purchased result — all in about five lines of configuration. It is built for developers who want their agents to programmatically pay for and consume external APIs, LLMs, data feeds, and other services without a custom token or intermediary.

How to use Mercury X402 Mcp?

Add the MCP server to your client config (e.g., Claude Desktop) using the provided command. The server exposes tools such as get_catalog to list available services, get_pricing to view current costs, and purchase to buy a specific item. The agent signs a real USDC transaction on Base mainnet, and the result is delivered back over the MCP protocol.

Key features of Mercury X402 Mcp

  • Agent-to-agent payments over HTTP 402 using real USDC.
  • Settles on Base mainnet – no custom token or coin.
  • Includes a catalog of LLM APIs, web search, data feeds, and more.
  • Uses the standard Coinbase x402-fetch + viem payment flow.
  • Single-developer project, early stage, live on mainnet.

Use cases of Mercury X402 Mcp

  • An AI assistant purchases on-demand LLM API credits for a conversation.
  • A research agent pays for a web search result in real time.
  • A trading bot accesses priced crypto price feeds via an MCP tool.

よくある質問

1

Is Mercury X402 Mcp live and usable?

Yes. Everything settles on Base mainnet in real USDC. The service is live but early — built solo and looking for first agent builders to integrate.

2

Do I need a custom token to pay?

No. Payments are made in real USDC directly on Base mainnet. No token or coin is required.

3

How does the agent pay?

The agent uses the HTTP 402 payment pattern with Coinbase’s `x402-fetch` library and `viem`. Each purchase is a real on-chain transaction signed by the agent’s wallet.

4

What services are in the catalog?

The catalog includes LLM APIs (e.g., GPT-4o, Claude Sonnet), web search, crypto prices, news, weather, and more. Prices are listed in USDC cents per call.

5

What are the runtime dependencies?

The server runs as an MCP host process. The agent must have a wallet with USDC on Base mainnet. No other runtime dependencies are mentioned.

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