x402-market

io.github.AsaiShota/mcp-server·v0.2.0-alpha.1·Other

Quality Score

/100

Let AI agents pay-per-call for any HTTP API via x402 on Base mainnet. One tool: pay_and_call.

Repository →Website →

§01 Install

Claude Desktop (claude_desktop_config.json)

{
  "mcpServers": {
    "mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@x402-market/mcp-server"
      ],
      "env": {
        "MARKET_API_URL": "https://x402-market-api.lien-studio-akiyama.workers.dev",
        "MCP_BUYER_PRIVATE_KEY": "<your-mcp_buyer_private_key>",
        "BASE_RPC_URL": "https://mainnet.base.org",
        "BASE_CHAIN_ID": "8453",
        "MCP_MAX_PRICE": "1.0"
      }
    }
  }
}

Cursor (.cursor/mcp.json)

{
  "mcpServers": {
    "mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@x402-market/mcp-server"
      ],
      "env": {
        "MARKET_API_URL": "https://x402-market-api.lien-studio-akiyama.workers.dev",
        "MCP_BUYER_PRIVATE_KEY": "<your-mcp_buyer_private_key>",
        "BASE_RPC_URL": "https://mainnet.base.org",
        "BASE_CHAIN_ID": "8453",
        "MCP_MAX_PRICE": "1.0"
      }
    }
  }
}

Cline (cline_mcp_settings.json)

npx -y @x402-market/mcp-server

§02 Environment variables

MARKET_API_URL

Marketplace API base URL.

MCP_BUYER_PRIVATE_KEY

secret

Funded buyer wallet private key (0x-prefixed). Required for pay_and_call; read-only tools work without it.

BASE_RPC_URL

Base RPC endpoint. Defaults to Base mainnet public RPC; Alchemy/QuickNode recommended for higher rate limits.

BASE_CHAIN_ID

8453 = Base mainnet (default, matches live listings). 84532 = Base Sepolia testnet.

MCP_MAX_PRICE

Hard cap on per-call cost (USDC). Refuses to pay above this.

§03 MCP Quality Score · methodology

freshness

completeness

installability

documentation

stability

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