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8 clients · secrets stay placeholders

JSON (mcpServers)Claude CodeCodexOpenCodeCursorVS CodeGemini CLIGoose

{
  "mcpServers": {
    "lettio": {
      "type": "http",
      "url": "https://mcp.lettio.eu/mcp"
    }
  }
}

claude mcp add --transport http lettio https://mcp.lettio.eu/mcp

[mcp_servers.lettio]
url = "https://mcp.lettio.eu/mcp"

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "lettio": {
      "type": "remote",
      "url": "https://mcp.lettio.eu/mcp",
      "enabled": true
    }
  }
}

{
  "mcpServers": {
    "lettio": {
      "type": "http",
      "url": "https://mcp.lettio.eu/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=lettio&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vbWNwLmxldHRpby5ldS9tY3AifQ%3D%3D"
}

{
  "servers": {
    "lettio": {
      "type": "http",
      "url": "https://mcp.lettio.eu/mcp"
    }
  }
}

{
  "mcpServers": {
    "lettio": {
      "httpUrl": "https://mcp.lettio.eu/mcp"
    }
  }
}

extensions:
  "lettio":
    enabled: true
    name: "lettio"
    type: streamable_http
    uri: "https://mcp.lettio.eu/mcp"
    timeout: 300

Quality 58 / 100needs work

protocoln/a · weight 25

n/a
protocol.modern, protocol.stateless, protocol.transport, protocol.list_ttlno remote answered a protocol handshake (not probed yet, unreachable, or local-only)

authorization50 · weight 15

fail
auth.prmno Protected Resource Metadata (RFC 9728); clients cannot discover the authorization server
pass
auth.as_metadataauthorization server metadata reachable
warn
auth.cimdonly Dynamic Client Registration, deprecated in 2026-07-28 in favour of CIMD
n/a
auth.secret_in_urlno templated URL

tool hygienen/a · weight 30

n/a
tools.descriptions, tools.description_length, tools.schemas, tools.annotations, tools.directory_hints, tools.token_cost, tools.api_dumptool list unknown (behind auth, not probed, or empty)

stabilityn/a · weight 15

n/a
stability.changes, stability.rug_pulltool list unknown

dependencies67 · weight 15

pass
deps.known_vulnsno known advisory in 98 resolved packages
fail
deps.mcp_sdk_version@modelcontextprotocol/sdk 1.30.1 has 1 known advisory (GHSA-6qxp-vccf-f47h); update @modelcontextprotocol/sdk to 1.31.0 or later
pass
deps.resolvable@lettio/[email protected] resolved: 98 packages

Tool list unknown · checked 2026-10-20 09:31 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 89 / 100

provenance75

liveness99

freshness85

hygiene100

+repository +dns-namespace +reachable +uptime-97% ~updated-35d-ago

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Dependencies

@lettio/[email protected] npm97 dependencies, resolved · MCP SDK @modelcontextprotocol/sdk 1.30.1 · advisories checked 2026-10-19

advisory	severity	package	fixed in
GHSA-6qxp-vccf-f47hMCP TypeScript SDK: OAuth client could send credentials to an authorization server chosen by the MCP server	high	`@modelcontextprotocol/[email protected]`MCP SDK, direct	fixed in `1.31.0`

Dependency graphs from deps.dev; advisories from OSV.dev, including the GitHub Advisory Database and the PyPI Advisory Database; all CC BY 4.0. The graph is what a clean install of this version resolves today; nothing was installed or run. How it is checked.

Endpoints

remote	auth	reachable	uptime 30d	p50	protocol	last ok
`https://mcp.lettio.eu/mcp` streamable-http	oauth2 AS: https://mcp.lettio.eu	yes	97%	580 ms	–	2026-10-20

package	registry	version	runtime	secrets
`@lettio/mcp`	npm	0.1.2	–	`LETTIO_PASSWORD`

Tools (0)

No tools observed. Tools appear once a credential-free probe can list them.

Schemas: list_tools.

Similar MCP servers

Official server.json

{
  "name": "eu.lettio/mcp",
  "title": "Lettio MCP",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://mcp.lettio.eu/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "0.1.2",
  "packages": [
    {
      "version": "0.1.2",
      "transport": {
        "type": "stdio"
      },
      "identifier": "@lettio/mcp",
      "registryType": "npm",
      "registryBaseUrl": "https://registry.npmjs.org",
      "environmentVariables": [
        {
          "name": "LETTIO_USERNAME",
          "isRequired": true,
          "description": "Full email address of the Lettio mailbox, e.g. [email protected]."
        },
        {
          "name": "LETTIO_PASSWORD",
          "isSecret": true,
          "isRequired": true,
          "description": "App password for the mailbox."
        },
        {
          "name": "LETTIO_HOST",
          "description": "Mail host. Defaults to https://mail.lettio.eu."
        }
      ]
    }
  ],
  "repository": {
    "url": "https://github.com/lettio-eu/mcp",
    "source": "github"
  },
  "description": "Private, EU-hosted email for AI agents over JMAP: read, search, reply, organize, send."
}