x402 Trinity MCP Server

io.github.devmster/x402-trinity

Repository Registry

What is the x402 Trinity MCP server?

Give an agent a wallet. Pays for x402 resources within hard limits. Base + USDC, gasless.

How to install x402 Trinity

Copy-paste configuration for popular MCP clients.

transport: stdio

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

Environment / auth

X402_PRIVATE_KEY
required
secret
Private key of the wallet that pays. Use a dedicated wallet holding only what you would accept losing. The server refuses to start without it.
X402_MAX_PER_REQUEST
required
Hard ceiling for a single payment, in atomic units (USDC has 6 decimals, so 50000 is $0.05). Required: a model decides when payments happen, so the cap cannot come from the model.
X402_TOTAL_BUDGET
required
Lifetime ceiling across all payments, in atomic units. Required for the same reason as the per-request cap.
X402_BUDGET_FILE
Path to a file that makes the lifetime budget survive restarts. Without it the total resets every time the server starts.
X402_ALLOW_HOSTS
Comma-separated hosts that may be paid. Anything else is refused however convincing the challenge looks.
X402_NETWORKS
Networks to accept. Defaults to base.

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

{
  "mcpServers": {
    "x402-trinity": {
      "command": "npx",
      "args": [
        "-y",
        "x402-trinity"
      ],
      "env": {
        "X402_PRIVATE_KEY": "<YOUR_X402_PRIVATE_KEY>",
        "X402_MAX_PER_REQUEST": "<YOUR_X402_MAX_PER_REQUEST>",
        "X402_TOTAL_BUDGET": "<YOUR_X402_TOTAL_BUDGET>",
        "X402_BUDGET_FILE": "<YOUR_X402_BUDGET_FILE>",
        "X402_ALLOW_HOSTS": "<YOUR_X402_ALLOW_HOSTS>",
        "X402_NETWORKS": "<YOUR_X402_NETWORKS>"
      }
    }
  }
}