x402-mcp

An MCP server that exposes 177 crypto market intelligence endpoints to AI agents, featuring automatic x402 USDC micropayments. It allows agents to access tools for crypto news, stablecoin metrics, on-chain Bitcoin data, and more, with payments handled directly from the user's wallet without API keys or subscriptions.

Package and access

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

Community listingLocal stdioSource reviewed; not executedPublished by CarbonCashmere

Vendor documentation

What you can do with it

Retrieve analyzed crypto news with sentiment and market impact
Get Bitcoin on-chain metrics like hash-rate and miner flows
Access stablecoin total market cap and chain distribution data
View top Bittensor miners by emission

Source and maintenance

Community listingRegistry 0.2.2

mcp-registry: io.github.CarbonCashmere/x402-mcp@0.2.2 Source repository

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.

@carbon-cashmere/x402-mcp 0.2.2

npm

@carbon-cashmere/x402-mcp package definition

{
  "version": "0.2.2",
  "transport": "stdio",
  "identifier": "@carbon-cashmere/x402-mcp",
  "registryType": "npm",
  "registryBaseUrl": "https://registry.npmjs.org",
  "environmentVariables": [
    {
      "name": "EVM_PRIVATE_KEY",
      "format": "string",
      "description": "0x-hex private key for Base/Polygon/Arbitrum USDC payments (dedicated wallet)"
    },
    {
      "name": "SVM_PRIVATE_KEY",
      "format": "string",
      "description": "base58 Solana keypair for Solana USDC payments (optional)"
    },
    {
      "name": "X402_TOOL_LIMIT",
      "format": "number",
      "default": "100",
      "description": "Max tools exposed (1-177, default 100)"
    }
  ]
}

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": {
    "x402-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@carbon-cashmere/x402-mcp@0.2.2"
      ],
      "env": {
        "EVM_PRIVATE_KEY": "<YOUR_EVM_PRIVATE_KEY>",
        "SVM_PRIVATE_KEY": "<YOUR_SVM_PRIVATE_KEY>",
        "X402_TOOL_LIMIT": "<YOUR_X402_TOOL_LIMIT>"
      }
    }
  }
}

Cline

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

Cline configuration

{
  "mcpServers": {
    "x402-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@carbon-cashmere/x402-mcp@0.2.2"
      ],
      "env": {
        "EVM_PRIVATE_KEY": "<YOUR_EVM_PRIVATE_KEY>",
        "SVM_PRIVATE_KEY": "<YOUR_SVM_PRIVATE_KEY>",
        "X402_TOOL_LIMIT": "<YOUR_X402_TOOL_LIMIT>"
      }
    }
  }
}

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": {
    "x402-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@carbon-cashmere/x402-mcp@0.2.2"
      ],
      "env": {
        "EVM_PRIVATE_KEY": "<YOUR_EVM_PRIVATE_KEY>",
        "SVM_PRIVATE_KEY": "<YOUR_SVM_PRIVATE_KEY>",
        "X402_TOOL_LIMIT": "<YOUR_X402_TOOL_LIMIT>"
      }
    }
  }
}

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": {
    "x402-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@carbon-cashmere/x402-mcp@0.2.2"
      ],
      "env": {
        "EVM_PRIVATE_KEY": "<YOUR_EVM_PRIVATE_KEY>",
        "SVM_PRIVATE_KEY": "<YOUR_SVM_PRIVATE_KEY>",
        "X402_TOOL_LIMIT": "<YOUR_X402_TOOL_LIMIT>"
      }
    }
  }
}

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