payagent-mcp

An MCP server for Arispay's payagent SDK, enabling AI agents to execute x402 micropayments on Base mainnet using USDC and EURC. It supports delegated custody via Coinbase CDP with server-enforced spend limits, idempotent payment execution, and capability-indexed agent discovery for agentic commerce.

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Package and access

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

Community listingLocal stdioSource reviewed; not executedPublished by Arispay

Vendor documentation

What you can do with it

Execute x402 micropayments on Base mainnet
Manage delegated custody and spend limits
Discover paid agent services via marketplace
Handle idempotent payment retries

Source and maintenance

Community listingRegistry 4.0.0

mcp-registry: io.github.stevemilton/payagent-mcp@4.0.0 mcp-registry: io.github.stevemilton/x402-payagent-mcp@4.1.0 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.

@arispay/payagent-mcp 4.0.0

npm

@arispay/payagent-mcp package definition

{
  "version": "4.0.0",
  "transport": "stdio",
  "identifier": "@arispay/payagent-mcp",
  "registryType": "npm",
  "registryBaseUrl": "https://registry.npmjs.org",
  "environmentVariables": [
    {
      "name": "ARISPAY_API_KEY",
      "description": "ArisPay developer API key (ap_live_… / ap_test_…). Optional — the create_user tool can self-provision one from just an email, or set PAYAGENT_PRIVATE_KEY to sign locally with no account."
    },
    {
      "name": "PAYAGENT_PRIVATE_KEY",
      "description": "EVM private key for permissionless local signing (zero-signup mode): pay_api signs x402 payments with it directly — no ArisPay account needed. Generate one with `npx payagent wallet new`. Never sent to any server."
    }
  ]
}

Tools

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No tool definitions available.

Connect from your client

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

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Cursor

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

Cursor configuration

{
  "mcpServers": {
    "payagent-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@arispay/payagent-mcp@4.0.0"
      ],
      "env": {
        "ARISPAY_API_KEY": "<YOUR_ARISPAY_API_KEY>",
        "PAYAGENT_PRIVATE_KEY": "<YOUR_PAYAGENT_PRIVATE_KEY>"
      }
    }
  }
}

Cline

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

Cline configuration

{
  "mcpServers": {
    "payagent-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@arispay/payagent-mcp@4.0.0"
      ],
      "env": {
        "ARISPAY_API_KEY": "<YOUR_ARISPAY_API_KEY>",
        "PAYAGENT_PRIVATE_KEY": "<YOUR_PAYAGENT_PRIVATE_KEY>"
      }
    }
  }
}

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": {
    "payagent-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@arispay/payagent-mcp@4.0.0"
      ],
      "env": {
        "ARISPAY_API_KEY": "<YOUR_ARISPAY_API_KEY>",
        "PAYAGENT_PRIVATE_KEY": "<YOUR_PAYAGENT_PRIVATE_KEY>"
      }
    }
  }
}

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": {
    "payagent-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@arispay/payagent-mcp@4.0.0"
      ],
      "env": {
        "ARISPAY_API_KEY": "<YOUR_ARISPAY_API_KEY>",
        "PAYAGENT_PRIVATE_KEY": "<YOUR_PAYAGENT_PRIVATE_KEY>"
      }
    }
  }
}

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