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mcp/harbor
VS Code

x402 sms for VS Code

io.github.ultrastarz/x402-sms

Pay-per-call MCP server. $0.03 USDC sends one transactional SMS to a US phone number via x402.

client:VS Code transport:stdio runtime:npm

Install x402 sms in VS Code

.vscode/mcp.json 

{
  "inputs": [
    {
      "type": "promptString",
      "id": "buyer-private-key",
      "description": "BUYER_PRIVATE_KEY",
      "password": true
    }
  ],
  "servers": {
    "x402-sms": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "x402-sms-mcp"
      ],
      "env": {
        "BUYER_PRIVATE_KEY": "${input:buyer-private-key}"
      }
    }
  }
}

VS Code prompts for each input the first time the server starts, so no secret is written to the file. VS Code docs

x402 sms in other clients

x402 sms MCP server