Xenarch MCP

Xenarch MCP server enables AI agents to transact in USDC on Base L2 for HTTP 402 gated content. It provides tools to check payment gates, execute non-custodial wallet-to-wallet payments, and review spending history without requiring API keys or gas tokens.

Visit Xenarch

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Community listingLocal stdioSource reviewed; not executedPublished by Xenarch

You need:Auto-generates a wallet on first run. No API keys, no signup required for agents.

Vendor documentation

What you can do with it

Check if a URL requires x402 payment
Pay for gated content or APIs with USDC
Review agent spending history

Source and maintenance

Community listingRegistry 1.3.1

mcp-registry: io.github.xenarch-ai/xenarch-mcp@1.3.1 Source repository Project website

Maintenance checked: Oct 31, 2026, 10:27 PM UTC

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

@xenarch/agent-mcp 1.3.1

npm

@xenarch/agent-mcp package definition

{
  "version": "1.3.1",
  "transport": "stdio",
  "identifier": "@xenarch/agent-mcp",
  "registryType": "npm",
  "environmentVariables": [
    {
      "name": "XENARCH_PRIVATE_KEY",
      "format": "string",
      "description": "Wallet private key (hex, 0x-prefixed). Auto-generates on first run if omitted."
    },
    {
      "name": "XENARCH_RPC_URL",
      "format": "string",
      "description": "Base RPC endpoint URL"
    },
    {
      "name": "XENARCH_NETWORK",
      "format": "string",
      "description": "Network for payments (base or base-sepolia)"
    },
    {
      "name": "XENARCH_MAX_PAYMENT_USD",
      "format": "string",
      "description": "Local per-call payment cap in USDC (default 1.00). The only spending ceiling in standalone mode; set 0 to disable. Connect XENARCH_API_TOKEN for managed per-tx/daily/monthly caps."
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.

Cursor configuration

{
  "mcpServers": {
    "xenarch-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@xenarch/agent-mcp@1.3.1"
      ],
      "env": {
        "XENARCH_PRIVATE_KEY": "<YOUR_XENARCH_PRIVATE_KEY>",
        "XENARCH_RPC_URL": "<YOUR_XENARCH_RPC_URL>",
        "XENARCH_NETWORK": "<YOUR_XENARCH_NETWORK>",
        "XENARCH_MAX_PAYMENT_USD": "<YOUR_XENARCH_MAX_PAYMENT_USD>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "xenarch-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@xenarch/agent-mcp@1.3.1"
      ],
      "env": {
        "XENARCH_PRIVATE_KEY": "<YOUR_XENARCH_PRIVATE_KEY>",
        "XENARCH_RPC_URL": "<YOUR_XENARCH_RPC_URL>",
        "XENARCH_NETWORK": "<YOUR_XENARCH_NETWORK>",
        "XENARCH_MAX_PAYMENT_USD": "<YOUR_XENARCH_MAX_PAYMENT_USD>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.

VS Code configuration

{
  "servers": {
    "xenarch-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@xenarch/agent-mcp@1.3.1"
      ],
      "env": {
        "XENARCH_PRIVATE_KEY": "<YOUR_XENARCH_PRIVATE_KEY>",
        "XENARCH_RPC_URL": "<YOUR_XENARCH_RPC_URL>",
        "XENARCH_NETWORK": "<YOUR_XENARCH_NETWORK>",
        "XENARCH_MAX_PAYMENT_USD": "<YOUR_XENARCH_MAX_PAYMENT_USD>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.

Claude Desktop configuration

{
  "mcpServers": {
    "xenarch-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@xenarch/agent-mcp@1.3.1"
      ],
      "env": {
        "XENARCH_PRIVATE_KEY": "<YOUR_XENARCH_PRIVATE_KEY>",
        "XENARCH_RPC_URL": "<YOUR_XENARCH_RPC_URL>",
        "XENARCH_NETWORK": "<YOUR_XENARCH_NETWORK>",
        "XENARCH_MAX_PAYMENT_USD": "<YOUR_XENARCH_MAX_PAYMENT_USD>"
      }
    }
  }
}

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