io.github.iancollins27/mailsnail MCP Server

Name: io.github.iancollins27/mailsnail MCP Server
Author: io.github.iancollins27

io.github.iancollins27/mailsnail

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What is the io.github.iancollins27/mailsnail MCP server?

Send USPS letters, postcards & certified mail from any agent. No signup; pay-per-piece via Stripe.

How to install io.github.iancollins27/mailsnail

Copy-paste configuration for popular MCP clients.

transport: stdio

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

Environment / auth

MAIL_PROVIDER
required
Where to mail from: 'managed' (default, no signup, pay-per-piece via Stripe), 'click2mail' (BYO account), or 'lob' (BYO key).
MAIL_API_BASE_URL
Hosted Mailsnail backend. Required when MAIL_PROVIDER=managed.
CLICK2MAIL_USERNAME
Click2Mail account username. Required when MAIL_PROVIDER=click2mail.
CLICK2MAIL_PASSWORD
secret
Click2Mail account password. Required when MAIL_PROVIDER=click2mail.
LOB_API_KEY
secret
Lob API key. Required when MAIL_PROVIDER=lob. test_* is free; live_* actually mails.
MAIL_MCP_ALLOW_LIVE
Set to '1' to actually mail in BYOK modes. Default '0' is dry-run.
MAIL_MCP_SPEND_CAP_USD
Per-session estimated spend cap. Server refuses sends past this.

Claude Desktop

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

{
  "mcpServers": {
    "mailsnail": {
      "command": "npx",
      "args": [
        "-y",
        "mailsnail"
      ],
      "env": {
        "MAIL_PROVIDER": "<YOUR_MAIL_PROVIDER>",
        "MAIL_API_BASE_URL": "<YOUR_MAIL_API_BASE_URL>",
        "CLICK2MAIL_USERNAME": "<YOUR_CLICK2MAIL_USERNAME>",
        "CLICK2MAIL_PASSWORD": "<YOUR_CLICK2MAIL_PASSWORD>",
        "LOB_API_KEY": "<YOUR_LOB_API_KEY>",
        "MAIL_MCP_ALLOW_LIVE": "<YOUR_MAIL_MCP_ALLOW_LIVE>",
        "MAIL_MCP_SPEND_CAP_USD": "<YOUR_MAIL_MCP_SPEND_CAP_USD>"
      }
    }
  }
}

Cursor

~/.cursor/mcp.json

{
  "mcpServers": {
    "mailsnail": {
      "command": "npx",
      "args": [
        "-y",
        "mailsnail"
      ],
      "env": {
        "MAIL_PROVIDER": "<YOUR_MAIL_PROVIDER>",
        "MAIL_API_BASE_URL": "<YOUR_MAIL_API_BASE_URL>",
        "CLICK2MAIL_USERNAME": "<YOUR_CLICK2MAIL_USERNAME>",
        "CLICK2MAIL_PASSWORD": "<YOUR_CLICK2MAIL_PASSWORD>",
        "LOB_API_KEY": "<YOUR_LOB_API_KEY>",
        "MAIL_MCP_ALLOW_LIVE": "<YOUR_MAIL_MCP_ALLOW_LIVE>",
        "MAIL_MCP_SPEND_CAP_USD": "<YOUR_MAIL_MCP_SPEND_CAP_USD>"
      }
    }
  }
}

Windsurf

~/.codeium/windsurf/mcp_config.json

{
  "mcpServers": {
    "mailsnail": {
      "command": "npx",
      "args": [
        "-y",
        "mailsnail"
      ],
      "env": {
        "MAIL_PROVIDER": "<YOUR_MAIL_PROVIDER>",
        "MAIL_API_BASE_URL": "<YOUR_MAIL_API_BASE_URL>",
        "CLICK2MAIL_USERNAME": "<YOUR_CLICK2MAIL_USERNAME>",
        "CLICK2MAIL_PASSWORD": "<YOUR_CLICK2MAIL_PASSWORD>",
        "LOB_API_KEY": "<YOUR_LOB_API_KEY>",
        "MAIL_MCP_ALLOW_LIVE": "<YOUR_MAIL_MCP_ALLOW_LIVE>",
        "MAIL_MCP_SPEND_CAP_USD": "<YOUR_MAIL_MCP_SPEND_CAP_USD>"
      }
    }
  }
}

VS Code

.vscode/mcp.json

{
  "servers": {
    "mailsnail": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "mailsnail"
      ],
      "env": {
        "MAIL_PROVIDER": "<YOUR_MAIL_PROVIDER>",
        "MAIL_API_BASE_URL": "<YOUR_MAIL_API_BASE_URL>",
        "CLICK2MAIL_USERNAME": "<YOUR_CLICK2MAIL_USERNAME>",
        "CLICK2MAIL_PASSWORD": "<YOUR_CLICK2MAIL_PASSWORD>",
        "LOB_API_KEY": "<YOUR_LOB_API_KEY>",
        "MAIL_MCP_ALLOW_LIVE": "<YOUR_MAIL_MCP_ALLOW_LIVE>",
        "MAIL_MCP_SPEND_CAP_USD": "<YOUR_MAIL_MCP_SPEND_CAP_USD>"
      }
    }
  }
}

Claude Code

claude mcp add mailsnail --env MAIL_PROVIDER=<YOUR_MAIL_PROVIDER> --env MAIL_API_BASE_URL=<YOUR_MAIL_API_BASE_URL> --env CLICK2MAIL_USERNAME=<YOUR_CLICK2MAIL_USERNAME> --env CLICK2MAIL_PASSWORD=<YOUR_CLICK2MAIL_PASSWORD> --env LOB_API_KEY=<YOUR_LOB_API_KEY> --env MAIL_MCP_ALLOW_LIVE=<YOUR_MAIL_MCP_ALLOW_LIVE> --env MAIL_MCP_SPEND_CAP_USD=<YOUR_MAIL_MCP_SPEND_CAP_USD> -- npx -y mailsnail