Skip to content
Mailroom logo

Mailroom MCP server

Which MCP servers are Mailroom's own, from the official registry and from asking its own domain, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-27

← Back to Mailroom

Whose server it is
  • Registry nameapp.usemailroom/mailroomverified in the MCP registry

The registry name sits under usemailroom.app. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-27
  • Stateanswerschecked 2026-10-27
  • Tools7
  • Server calls itselfmailroom
  • Server version1.30.0
  • Protocol version2025-06-18

On 2026-10-27 the server answered initialize and tools/list without a sign-in. First answer in 75 ms.

Should an agent connect itNot proven either way yet
  • Whether its tools do the product's job has not been judged yet.
  • Checked on 1 of the 7 days it takes to judge reliability.

Once connected

  • send_email change data without a sign-in: anyone with the address can call them.
  • Parameters are untyped or undescribed in 6 of 7 tools: check arguments before calling.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 1, the first on 2026-10-27
  • INITE MCP scoreafter a weeka score needs 7 daily checks: 1 so far
  • Answeredmeasuring1 of the 7 daily checks it takes to print a share
  • Median first answer438 ms
  • Space in an agent's context≈ 598 tokensthe definitions of all its tools (7), which an agent carries on every turn
  • Tool definitionsB · 86 of 100
  • Typed results7 of 7 toolsdeclared outputSchema: results come typed, read once
  • Parameters without a description: in 6 of 7

Worth a look

  • Tools that change data, on a server that answers without a sign-in: send_email

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers7 tools · read 2026-10-27
  • list_folders

    List all folders in the connected mailbox.

  • search_messages

    Search a folder. criteria examples: ALL, UNSEEN, FROM [email protected].

  • read_message

    Read one message by IMAP UID.

  • flag_message

    Flag a message. action: seen, unseen, flagged, unflagged, deleted. deleted moves the message to the mailbox's Trash folder (recoverable). Use empty_trash to delete permanently.

  • move_message

    Move a message to dest_folder.

  • send_email

    Send email via SMTP. Pass confirm=true to actually send. Otherwise returns a preview.

  • empty_trash

    Permanently delete every message in the Trash folder. Returns a preview (folder and message count) unless confirm=true.

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "mailroom": {
      "type": "http",
      "url": "https://usemailroom.app/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http usemailroom https://usemailroom.app/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://usemailroom.app/mcp as a custom connector in the settings.

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.