x402 Notary MCP MCP Server

io.github.forgemeshlabs/x402-notary-mcp

Repository Registry

What is the x402 Notary MCP MCP server?

Cryptographic receipts for AI outputs on Base or Solana via x402.

How to install x402 Notary MCP

Copy-paste configuration for popular MCP clients.

transport: stdio

Config generated by PluginBench — verify against the source before use.

Environment / auth

WALLET_PRIVATE_KEY
secret
Dedicated low-balance Base wallet private key for x402 USDC micropayments. Optional — verification tools work without it. Never use your primary wallet.
NOTARY_RAIL
Payment rail: base or solana. Defaults to base, or solana when NOTARY_BASE_URL contains notary-solana.
NOTARY_BASE_URL
Notary API origin. Use https://notary.forgemesh.io for Base or https://notary-solana.forgemesh.io for Solana.
SOLANA_PRIVATE_KEY
secret
Dedicated low-balance Solana keypair for x402 USDC micropayments. Supports JSON byte array, base58, base64, or hex. Optional — verification tools work without it.

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "x402-notary-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@forgemeshlabs/x402-notary-mcp"
      ],
      "env": {
        "WALLET_PRIVATE_KEY": "<YOUR_WALLET_PRIVATE_KEY>",
        "NOTARY_RAIL": "<YOUR_NOTARY_RAIL>",
        "NOTARY_BASE_URL": "<YOUR_NOTARY_BASE_URL>",
        "SOLANA_PRIVATE_KEY": "<YOUR_SOLANA_PRIVATE_KEY>"
      }
    }
  }
}

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