The MCP Server Directory
Every Model Context Protocol server, scored on reliability, documentation, maintenance, and adoption. Independent, opinionated, refreshed daily from the official registry.
What this is
The MCP Server Directory is a live, independently maintained index of Model Context Protocol servers published to the official registry. Each server is scored 0–10 on four dimensions: reliability, documentation quality, maintenance velocity, and adoption. The directory is free, updated daily, and built by MegaOne AI.
Email Signatures
4.1/10Audit and build email signatures that survive Gmail, Outlook desktop and Apple Mail.
Calensync
4.1/10Manage Google, Outlook & Apple calendars and create private sync rules from chat.
Emailchaser
4.1/10Run cold email outbound from an AI agent: campaigns, leads, replies, sender accounts, autopilot.
Sendly
4.1/10Send email, manage contacts, campaigns and workflows, and diagnose deliverability in Sendly.
Outsend
4.1/10Find local businesses, enrich them with emails and socials, and run lead pipelines from your AI.
Hilead
4.1/10Signal-based B2B prospecting: find leads with buying intent, run email and LinkedIn outreach.
Gennons
4.1/10Design emails from a brief, send tests, send to your lists now or scheduled, and read delivery.
Email Platform
4.1/10AI-first email platform: templates, audiences, journeys. Sends real email when the key allows it.
MCP Server
4.1/10Email marketing for Russian businesses: lists, campaigns, reports, transactional email.
Reminders
4.1/10Reminders your agent creates: email, WhatsApp, SMS or call, in steps you set. Stops on acknowledge.
Formcarry
4.1/10Set up form handling for your site (email alerts, auto replies, webhooks) and query submissions.
Plumail
4.1/10Manage a Plumail email workspace: subscribers, segments, campaigns, transactional sends and stats.
Chasync
4.1/10Connect AI assistants to Chasync CRM for leads, funnels, forms, email templates and analytics.
Email Verification
4.1/10Check whether an email address can receive mail — one address or a list — without sending to it.
MCP Server
4.1/10Send real pen-written letters, cards and postcards: quote, preview, order and track by mail.
Domain Trust
4.1/10Email security and AI discoverability scores for any domain, with the exact record or tag to fix.
Project
4.1/10Read-only access to Cogram projects, meetings, email, RFIs and drawings for architects and engineers
Workforce
4.1/10AI employees that run your CRM, invoicing, email, documents, dashboards and agents
Mailcheer
4.1/10Email API + newsletters. 17 MCP tools. OAuth 2.1 PKCE or API key. EU-hosted (Hetzner + SES).
Kgld Attestation
4.1/10KGLD gold-token reserve proof: custody vs supply, auditor report hash, human verification by email
MCP Server
4.1/10Email, WhatsApp and Telegram for AI agents: send, campaigns, automations, contacts, agent inboxes.
MCP Server
4.1/10Let your agent into iCloud Mail, calendar and contacts. It gets actions, never your password.
MCP Server
4.1/10Email infrastructure as a service: mailboxes, domains, dedicated IPs, sending, deliverability.
Derrick
4.1/10B2B data enrichment: verified work emails, phones, firmographics, tech stack, hiring signals.
Cards
4.1/10Mail a real greeting card, handwritten with a pen or printed, to a US address by a date.
Mail real US letters, postcards and certified mail from an agent, quoted before sending.
Higgs Hub
4.1/10Gmail, Outlook, Drive, OneDrive and calendars for AI agents. Many accounts, one endpoint, audit log.
MCP Server
4.1/10Disposable email inboxes for AI agents: create an address, wait for the OTP or verify link.
Deeplead
4.1/10Find local businesses, companies and decision makers with verified emails for B2B outreach.
Postbox Tools
4.1/10Free email checks: 24 blacklists, spoofing/BEC grade, redirect tracing, email spam test, WHOIS.
Userport
4.1/10Read and answer support conversations, and run outbound email and chat sequences, from your AI.
Read and draft email you forward to a private alias. Agents cannot send or delete mail.
Universal Agents
4.1/10Ask Universal Agents what we sell (Interplay), pricing, and FAQs; draft an intro email.
Instant Term Sheet
4.1/10Written term sheets for 1–4 unit DSCR investment property loans, by email. Business-purpose only.
Mxverdict
4.1/10Free, read-only email and DNS checks: SPF, DKIM, DMARC, MX, DNS records, blocklists, domain health.
Lookup
4.1/10Look up any domain, IP address or AS number: hosting, DNS, registration, email, TLS and headers.
MCP Server
4.1/10Cold email infrastructure: domains, mailboxes, warm-up and campaigns. Never charges a card.
MCP Server
4.1/10Email hosting from your AI: read and send mail, add domains, check DNS and manage mailboxes.
Sendhq
4.1/10Send and receive email from your verified domains; manage domains, templates and deliverability.
Replylayer
4.1/10Safe email for AI agents: a mailbox with inbound scanning, outbound checks and human review.
Signatoro
4.1/10Make email signatures, get install steps for your mail app, and manage your company's signatures.
Domaindna Api
4.1/10Tech stack, email security (SPF, DMARC, MX provider) and domain age API + MCP. 25 free domains/day.
MCP Server
4.1/10Audit B2B SaaS lifecycle emails with the 7-point Decision Friction Model: score, patterns, fixes.
Email Tools
4.1/10Email deliverability checks: SPF, DKIM, DMARC, BIMI, MTA-STS, blacklists, headers, spam words
Bkk Staff
4.1/10Automated resume screening for small businesses: post jobs, rank applicants, email candidates.
MCP Server
4.1/10Manage MailSenpai email marketing: lists, subscribers, templates and campaigns (EU, OAuth).
Mailvakt
4.1/10Use when email lands in spam: audits SPF, DKIM, DMARC, MX and returns the DNS records to fix it.
Free · No spam
New servers, score changes, breakages
Every Monday: what shipped, what broke, what's worth trying. Five minutes. No filler.
Four dimensions, weighted
- Reliability (30%) — repository present, permissive license, not archived, official status.
- Documentation (20%) — description length, website presence, README quality.
- Maintenance (25%) — how recently the code was pushed; versioning discipline.
- Adoption (25%) — GitHub stars (log-scaled), remote availability, official endorsement.
What is MCP?
MCP stands for Model Context Protocol. It is an open standard introduced by Anthropic in late 2024 that lets AI assistants like Claude connect to external tools, data sources, and services through a common interface. An MCP server is a small program that exposes one capability (file access, a database, an API) to any MCP-compatible AI client.
Where does the data come from?
Every server in this directory is pulled from the official Model Context Protocol Registry at registry.modelcontextprotocol.io. We also enrich each entry with GitHub metadata (stars, last commit, license, primary language) where a repository is linked. The full re-scan runs daily.
How are servers scored?
Each server gets a 0–10 overall score, weighted from four sub-scores: reliability (30%), documentation (20%), maintenance (25%), and adoption (25%). The full methodology is visible on this page under "How scoring works".
Is this affiliated with Anthropic?
No. MegaOne AI is independent. Anthropic created the MCP standard and maintains the reference implementations, but this directory is built separately and rates all servers including Anthropic's own.
How often does the directory update?
The pipeline re-fetches the full registry and re-scores every active server once per day. Individual entries are refreshed whenever a new version is published to the official registry.
Is it free?
Yes. Browsing, filtering, and searching the directory is free. The weekly email briefing is free. There is no account required.