How do I install mailsnail?

Pick a client above and copy the generated config. Cursor and VS Code also have a deep link when the server can run locally or remotely.

Is mailsnail official?

No. Registry-listed is not the same as vendor-official. Read the methodology for the difference.

How is the trust score calculated?

This listing scores 45 (Fair). The formula is published on the methodology page.

MCPpedia

mailsnail MCP Server — Install for Claude, Cursor & VS Code | MCPpedia

mailsnail MCP Server

Name: mailsnail MCP Server
Author: iancollins27

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

Tools Versions Alternatives

Registryiancollins27

45Fair

Install

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

{
  "mcpServers": {
    "iancollins27-mailsnail": {
      "command": "npx",
      "args": [
        "-y",
        "mailsnail@0.6.0"
      ],
      "env": {
        "MAIL_PROVIDER": "managed",
        "MAIL_API_BASE_URL": "https://api.mailsnail.dev",
        "CLICK2MAIL_USERNAME": "",
        "CLICK2MAIL_PASSWORD": "YOUR_CLICK2MAIL_PASSWORD",
        "LOB_API_KEY": "YOUR_LOB_API_KEY",
        "MAIL_MCP_ALLOW_LIVE": "0",
        "MAIL_MCP_SPEND_CAP_USD": "25"
      }
    }
  }
}

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Environment

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

mailsnail MCP Server

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