Server data from the Official MCP Registry
A real inbox for agents: read mail, draft replies you approve, wait for verification codes.
About
A real inbox for agents: read mail, draft replies you approve, wait for verification codes.
Remote endpoints: streamable-http: https://mcp.mailly.site/mcp
Security Report
Valid MCP server (2 strong, 2 medium validity signals). 4 known CVEs in dependencies (0 critical, 1 high severity) Imported from the Official MCP Registry. Trust signals: 4 highly-trusted packages.
Endpoint verified · Requires authentication · 5 issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Found in Source Code
Found by scanning the linked source code. This listing connects to a hosted endpoint, so none of this runs on your machine: it describes what the server software does where it is hosted.
How to Connect
Remote Plugin
No local installation needed. Your AI client connects to the remote endpoint directly.
Add this to your MCP configuration to connect:
{
"mcpServers": {
"site-mailly-mcp": {
"url": "https://mcp.mailly.site/mcp"
}
}
}Documentation
View on GitHubFrom the project's GitHub README.
mailly-mcp
The MCP server behind Mailly's connector, plus the Mailly plugin for Claude and Codex.
src/: the MCP server, a Cloudflare Worker. It offers typed tools for Mailly mail, drafts, sending, domains, contacts, templates, campaigns, workflows and webhooks. Every tool calls the Mailly REST API with the caller's Mailly API key, so authentication, billing and workspace isolation all stay in the API.ui/: the MCP Apps UI (email and draft cards), bundled intoui://resources. It is off unlessMCP_APPS=1.plugins/mailly: the plugin for Claude (claude.ai, Cowork and Claude Code) and Codex. It points at the hosted server and adds a skill for working with email safely.
Use the hosted server
Add https://mcp.mailly.site/mcp as a remote MCP server and sign in with your Mailly account (OAuth). In
Claude Code you can install the plugin instead:
/plugin install mailly --marketplace superagents-lab/mailly-mcp
This server is an OAuth protected resource. Mailly's API (https://api.mailly.site/api/auth) is the authorization
server: clients find it through /.well-known/oauth-protected-resource, sign the user in there, and send the
access token here. The server passes the token, or an API key, unchanged to Mailly's REST API, which checks it and
the scopes it carries. The tool list is narrowed to the same scopes (GET /me).
Run it yourself
npm install
npm run dev # wrangler dev on http://localhost:8787/mcp
Call /mcp with Authorization: Bearer <your Mailly API key> (from https://mailly.site/app/developers).
Without the MAILLY_API service binding it calls MAILLY_API_URL (default https://api.mailly.site) over
the internet. To host your own copy, change the mcp.mailly.site route in wrangler.jsonc. OAuth sign-in only
works at https://mcp.mailly.site/mcp, because Mailly issues tokens for that resource; elsewhere use an API key.
Develop
npm run typecheck
npm test # builds dist/worker.js and runs it in Miniflare against a stub API
The Mailly server repository runs its OAuth and end-to-end tests against dist/worker.js from a sibling
checkout of this repository.
server.json is the listing in the MCP Registry as
site.mailly/mcp. The site.mailly namespace is proven by a DNS TXT record on mailly.site, so publish with
mcp-publisher login dns --domain mailly.site --private-key <key> and mcp-publisher publish from a machine that
holds the key. Bump version for each release.
License
MIT
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