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.
M365 Graph
4.7/10Manage Microsoft 365 email, calendar, contacts and inbox rules via the Graph API with OAuth 2.0.
Stateful email for AI agents — read inboxes, reply in-thread, draft with approval.
Mailverdict
4.7/10Keyless email checks: disposable, role, and free-provider detection, MX, and typo suggestions.
Commerce Validators
4.7/10Commerce validators: live EU VAT (VIES), EORI, email/MX lookups; IBAN/ABA/GTIN checksums; VAT rates.
Mailerlite
4.7/10Read subscribers, groups, campaigns, fields, segments, automations, webhooks; safe additive writes.
Bird
4.7/10Read SMS, WhatsApp, email, contacts and audiences from your Bird workspace, plus safe CRM writes.
Customerio
4.7/10Query people, segments, campaigns, and message deliveries; send transactional email or broadcasts.
Lob
4.7/10Verify US & international addresses and send physical mail (postcards, letters, checks) via Lob.
Nylas
4.7/10MCP server for Nylas — read email, calendars, events and contacts, and send email or create events.
Emailoctopus
4.7/10Manage lists, contacts and campaigns, and read campaign performance reports on EmailOctopus.
Missive
4.7/10Read email/chat conversations, messages, contacts and teams; draft, send and update threads.
Sendgrid
4.7/10Send email and read templates, marketing contacts, lists, stats, bounces and unsubscribes.
Emailmd
4.7/10Render markdown into email-safe HTML, lint drafts for deliverability problems, and preview emails.
Domain Intel MCP
4.7/10Domain & company intel for AI agents: RDAP, DNS, email deliverability, tech stack. No API keys.
Lead Generation MCP
4.7/10B2B and local lead gen: verified emails, site contacts, Maps and Yellow Pages leads.
Mailchimp
4.7/10Read audiences, members, campaigns and reports; add, update, tag and archive subscribers.
Nitrosend
4.7/10AI-native email marketing. Campaigns, automations, transactional, contacts, and analytics.
MCP Esim
4.7/10Travel eSIMs for 193 countries. Stripe + Bitcoin checkout. QR by email in 30s. No API key.
Demipass
4.7/10Credential custody for agents: use secrets blind (ssh/http/smtp/git/db), never in context.
Proxyllm MCP
4.7/10OpenAI-compatible LLM gateway: models, savings math, key provisioning, autonomous email-OTP signup
Clize
4.7/10Real-world actions for AI coding agents: domains, email, deploys, payments, and media generation.
MCP Server
4.7/10Scrape Google Maps business data from any MCP client — names, phones, emails, websites, ratings.
Zerodrop MCP
4.7/10Disposable email inboxes for AI agents — OTPs and magic links auto-extracted. No signup needed.
Sendable
4.7/10Send transactional email from your editor — describe the event, Sendable writes and sends it.
Proton Bridge MCP
4.7/10Read, organise and carefully-gated send for Proton Mail, without your mail leaving this machine.
Email Validation
4.7/10Verify email addresses, clean lists, and audit a domain SPF, DKIM, DMARC and MX setup.
Senderkit
4.5/10Build and send email, SMS, and push straight from your AI agent.
Platform
4.5/10335 MCP tools, 75 playbooks. AI-native CRM, email/SMS, events, OAuth.
MCP Server
4.5/10Send transactional emails from AI agents via Truncus. Validate, track delivery, and manage domains.
MCP Server
4.5/10Tickstem developer tools — manage cron jobs and verify emails from your AI coding assistant.
Mailtrap
4.5/10Send emails and manage sending domains, suppression lists, and delivery analytics
Gmail
4.5/10MCP server for Gmail with OAuth2 (personal) and service account (Workspace) support.
SpiderIQ Mail: SpiderMail mailboxes, messages, threads, send, compose for AI agents
MCP Domain Deliverability Checker
4.5/10Audit a domain email deliverability via Apify: SPF, DKIM, DMARC, MX, blacklist, catch-all, age.
MCP Server
4.5/10AI-powered email & WhatsApp for teams — manage your shared inbox from Claude, Cursor or ChatGPT.
Pntr
4.5/10Free developer subdomains with DNS, catch-all email, and webhook capture, managed via MCP.
MCP Email Waterfall Orchestrator
4.5/10Finds and verifies work emails on your own provider keys, with real per-provider spend.
MCP People Finder
4.5/10Find people at a company by role, seniority and department, with verified business emails.
MCP Server
4.3/10Send emails, track events, and manage contacts with MailJunky.
Gmail
4.3/10Read emails, send messages, and manage labels in your Gmail account.
Loops
4.3/10Manage Loops contacts, mailing lists, and transactional/event emails.
MCP Server
4.3/10Official parseAPI MCP. Place, IP, email, phone, weather, currency lookups.
MCP Server
4.3/10Official MCP Server for Mailtrap
Misarmail
4.1/10Full email marketing platform: inbox, campaigns, contacts, templates, and analytics via MCP.
Reach
4.1/10Enrich leads, generate prospect lists, and validate emails using Versium's B2B2C identity graph.
Email Deliverability
4.1/10Check SPF/DKIM/DMARC/BIMI, blacklists, SMTP/IMAP; DNS lookups; generate email DNS records.
Mailbox
4.1/10Physical mail API for AI agents. Send letters, certified mail. Sandbox + live keys via MCP.
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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.