Proton Mail (unofficial)

{
  "_meta": {
    "io.modelcontextprotocol.registry/official": {
      "status": "active",
      "isLatest": true,
      "updatedAt": "2026-05-30T13:42:09.382637Z",
      "publishedAt": "2026-05-30T13:42:09.382637Z",
      "statusChangedAt": "2026-05-30T13:42:09.382637Z"
    }
  },
  "server": {
    "name": "io.github.sethbang/proton-mail-mcp",
    "title": "Proton Mail (unofficial)",
    "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
    "version": "1.0.2",
    "packages": [
      {
        "version": "1.0.2",
        "transport": {
          "type": "stdio"
        },
        "identifier": "proton-mail-mcp",
        "runtimeHint": "npx",
        "registryType": "npm",
        "registryBaseUrl": "https://registry.npmjs.org",
        "environmentVariables": [
          {
            "name": "PROTONMAIL_USERNAME",
            "isRequired": true,
            "description": "Your Proton Mail email address"
          },
          {
            "name": "PROTONMAIL_PASSWORD",
            "isSecret": true,
            "isRequired": true,
            "description": "Your Proton Mail SMTP password (not your login password; generate one in Proton settings)"
          },
          {
            "name": "PROTONMAIL_HOST",
            "default": "smtp.protonmail.ch",
            "description": "SMTP host"
          },
          {
            "name": "PROTONMAIL_PORT",
            "format": "number",
            "default": "587",
            "description": "SMTP port"
          },
          {
            "name": "PROTONMAIL_SECURE",
            "default": "false",
            "description": "Use TLS for SMTP (true for port 465)"
          },
          {
            "name": "IMAP_HOST",
            "default": "127.0.0.1",
            "description": "Proton Mail Bridge IMAP host (required for read/search tools)"
          },
          {
            "name": "IMAP_PORT",
            "format": "number",
            "default": "1143",
            "description": "Proton Mail Bridge IMAP port"
          },
          {
            "name": "IMAP_SECURE",
            "default": "false",
            "description": "Use TLS for IMAP"
          },
          {
            "name": "IMAP_USERNAME",
            "description": "Proton Mail Bridge username (falls back to PROTONMAIL_USERNAME)"
          },
          {
            "name": "IMAP_PASSWORD",
            "isSecret": true,
            "description": "Proton Mail Bridge password (falls back to PROTONMAIL_PASSWORD)"
          },
          {
            "name": "READONLY",
            "default": "false",
            "description": "Disable all mutating tools (send, move, delete, flags, labels, bulk ops, folder/label management)"
          },
          {
            "name": "RESTRICT_OUTBOUND_TO_SELF",
            "default": "false",
            "description": "Refuse live sends to any recipient other than PROTONMAIL_USERNAME (for throwaway/QA accounts)"
          },
          {
            "name": "ALLOW_FILE_DOWNLOAD_DIR",
            "description": "Allowlist directory enabling download_attachment.saveTo; when unset, attachments return as inline base64"
          },
          {
            "name": "ALLOW_EMPTY_FOLDER",
            "default": "false",
            "description": "Register the empty_folder tool (not recommended)"
          },
          {
            "name": "DEBUG",
            "default": "false",
            "description": "Enable verbose logging to stderr"
          }
        ]
      }
    ],
    "repository": {
      "url": "https://github.com/sethbang/proton-mail-mcp",
      "source": "github"
    },
    "websiteUrl": "https://sethbang.github.io/proton-mail-mcp/",
    "description": "Unofficial Proton Mail MCP — send, read, search & organize email over SMTP and IMAP"
  }
}