mailsnail

{
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-09-29/server.schema.json",
  "name": "io.github.iancollins27/mailsnail",
  "description": "Send USPS letters, postcards & certified mail from any agent. No signup; pay-per-piece via Stripe.",
  "repository": {
    "url": "https://github.com/iancollins27/mailsnail",
    "source": "github"
  },
  "version": "0.6.0",
  "websiteUrl": "https://mailsnail.dev",
  "packages": [
    {
      "registryType": "npm",
      "registryBaseUrl": "https://registry.npmjs.org",
      "identifier": "mailsnail",
      "version": "0.6.0",
      "transport": {
        "type": "stdio"
      },
      "environmentVariables": [
        {
          "description": "Where to mail from: 'managed' (default, no signup, pay-per-piece via Stripe), 'click2mail' (BYO account), or 'lob' (BYO key).",
          "isRequired": true,
          "default": "managed",
          "name": "MAIL_PROVIDER"
        },
        {
          "description": "Hosted Mailsnail backend. Required when MAIL_PROVIDER=managed.",
          "default": "https://api.mailsnail.dev",
          "name": "MAIL_API_BASE_URL"
        },
        {
          "description": "Click2Mail account username. Required when MAIL_PROVIDER=click2mail.",
          "name": "CLICK2MAIL_USERNAME"
        },
        {
          "description": "Click2Mail account password. Required when MAIL_PROVIDER=click2mail.",
          "isSecret": true,
          "name": "CLICK2MAIL_PASSWORD"
        },
        {
          "description": "Lob API key. Required when MAIL_PROVIDER=lob. test_* is free; live_* actually mails.",
          "isSecret": true,
          "name": "LOB_API_KEY"
        },
        {
          "description": "Set to '1' to actually mail in BYOK modes. Default '0' is dry-run.",
          "default": "0",
          "name": "MAIL_MCP_ALLOW_LIVE"
        },
        {
          "description": "Per-session estimated spend cap. Server refuses sends past this.",
          "default": "25",
          "name": "MAIL_MCP_SPEND_CAP_USD"
        }
      ]
    }
  ]
}