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.
Korea Invoice MCP
4.9/10Korea POPBiLL e-tax-invoice: AI agents issue, query & transmit e-invoices, stateless BYO.
Luxembourg Invoice MCP
4.9/10Luxembourg Peppol BIS 3.0 e-invoices for AI agents: send, check recipient, get delivery proof.
Netherlands Invoice MCP
4.9/10Netherlands Peppol BIS 3.0 e-invoices for AI agents: send, check recipient, get delivery proof.
Norway Invoice MCP
4.9/10Norway Peppol/EHF BIS 3.0 e-invoices for AI agents: send, check recipient, get delivery proof.
Paraguay Invoice MCP
4.9/10Paraguay SIFEN e-Kuatia: AI agents issue and query electronic invoices, stateless BYO.
Sweden Invoice MCP
4.9/10Sweden Peppol BIS 3.0 e-invoices for AI agents: send, check recipient, get delivery proof.
Thailand Invoice MCP
4.9/10Thailand Leceipt e-Tax: AI agents create, poll and download e-Tax Invoices, stateless BYO.
Uruguay Invoice MCP
4.9/10Uruguay DGI e-Factura (CFE): AI agents submit signed sobres to DGI e-invoicing, stateless forwarder.
Vietnam Invoice MCP
4.9/10Vietnam MISA meInvoice: AI agents create, publish and query e-invoices, stateless BYO.
Market Data
4.9/10Verified market data for AI trading agents: quality-flagged candles, funding, OI, order flow. x402.
Accountingqb
4.9/10QuickBooks Online for Claude: reports, bookkeeping cleanup, and US & Canadian tax prep.
Elkassabgidata
4.9/10A growing family of free academic data libraries: finance, economics, and beyond (ElkassabgiData).
Trust MCP
4.9/10Deterministic pre-execution audit for trading agents. PASS/WAIT/FAIL, reproducible verdict_hash.
X402 Tools
4.9/10Pay-per-use weather, environment, finance, and on-chain intelligence tools for AI agents via x402.
MCP Server
4.9/10Pay-per-query x402 business intelligence on Base, settled in USDC via the native 402 payment flow.
Amberflo
4.9/10Query and manage Amberflo metering & billing: customers, meters, usage, plans, invoices, prepaid.
Autumn
4.9/10MCP server for Autumn — read customers, plans, balances & invoices; track usage and attach plans.
Chargebee
4.9/10Read Chargebee customers, subscriptions, invoices, items, transactions, credit notes and coupons.
Cliniko
4.9/10Hosted MCP server for Cliniko — patients, appointments, availability, and invoices for AI agents.
Codat
4.9/10MCP server for Codat — companies, connections, invoices, bills and financial statements.
Lago
4.9/10Read Lago customers, subscriptions, invoices, usage and revenue analytics; write events.
Mercoa
4.9/10Query and manage Mercoa AP/AR bill-pay: entities, invoices, transactions and payment methods.
Modern Treasury
4.9/10MCP server for Modern Treasury — payment orders, transactions, counterparties and ledgers.
Orb
4.9/10Read Orb customers, subscriptions, invoices, usage and costs; create or update customers.
Quaderno
4.9/10MCP server for Quaderno — tax-rate calculation, invoices, contacts, products, receipts & expenses.
Recurly
4.9/10MCP server for Recurly — accounts, subscriptions, invoices, plans; cancel & pause subs.
Mortgage Tools
4.9/10Australian mortgage tools: repayment & borrowing-power calculators, guidance & enquiry capture.
Marketplace
4.9/10Signed sandbox verdicts on any artifact, plus an agent marketplace. No key, no signup, no payment.
Preflight402
4.9/10Trust verdict for an x402 payment endpoint: health, 402 handshake, price, proceed/caution/avoid.
Numetric
4.9/10Read-only NuMetric.work accounting & ERP data: statements, KPIs, reports, invoices, documents.
Trading
4.9/10Trade 16 crypto exchanges + MetaTrader 5 from your AI assistant via one MCP connection.
Invoicehub
4.9/10Validate, generate & convert EU e-invoices (UBL, CII, XRechnung, Factur-X) — EN 16931 pre-validated.
MCP Server
4.9/10Malaysian SME accounting, e-Invoice and payroll for your AI. 64 tools; writes are approved drafts.
Harvest
4.9/10Read time entries, projects, clients, tasks and invoices; log and update tracked time.
Thousand Api
4.9/10Certainty for AI Agents. Deterministic MCP tools for dates, crypto, finance. 84 tools.
Procurement
4.9/10Greek public procurement: tenders, awards, contracts, payments, suppliers, expiring contracts.
Mini Accountant
4.9/10Hosted MCP server for Mini Accountant: invoices, expenses, customers, analytics, tax estimates.
Agri Ja
4.9/10Japanese agriculture policy, subsidies and rice advance payments. 日本の農業政策・補助金・米の概算金
X402 Gateway
4.9/10Discover x402 paid APIs and inspect fresh payment requirements before authorizing spend.
MCP Server
4.9/10Anomaly detection for AI trading agents: read-only, flags the hour the agent breaks its baseline.
MCP Server
4.9/10Free finance and trading calculators as MCP tools: risk/reward, RMD, Coast FIRE, inflation.
Candor Finance
4.9/10Personal-finance workspace for AI agents: accounts, spending, budgets, goals, and investments.
Netcafe Docs
4.9/10Statements, invoices, tables, ledgers — every result carries its own arithmetic proof.
Tradeonyx
4.9/10Trading journal with pattern detection: log trades by voice, query your own history.
MCP Server
4.9/10Solana memecoin rug check for trading agents: pump.fun launches, calibrated rug risk, wallets, KOL.
Stripe
4.9/10Hosted Stripe MCP server: 18 tools for payments, subscriptions, invoicing, customers, and reporting.
Business
4.9/1030 finance, bookkeeping, legal-ops and SMB operations skill products. 6 of 8 tools free.
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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.