MCP Server Directory

Persistent memory + vibe-loop engine for AI agents. Single Go binary, SQLite-backed, stdio MCP.

Lacuna Research MCP io.github.tiptreesystems/lacuna-research-mcp

Search Lacuna's ML research graph for papers, directions, authors, venues, and hypotheses.

us-congress-trades io.github.johnisanerd/us-congress-trades

US Congress stock trades and financial disclosures by member, ticker, or date, hosted MCP.

GraphQL gateway for LLMs. Handles huge GitHub GraphQL & @neo4j/graphql schemas without crashing

Air Quality MCP io.github.Lulu-The-Narwhal/air-quality-mcp

Free, keyless real-time air quality (US AQI plus PM2.5, PM10, ozone, NO2, SO2, CO) for any city.

Connects coding agents to a running QuestDB Web Console: notebook cells, SQL queries, and charts.

HPSILab Quant Finance io.github.haiyunsky/hpsilab-quant-finance-mcp

Stock & options risk analytics for AI agents: pre-trade risk scan, IV, gamma walls, Monte Carlo.

Live service outage data from 100+ status pages. Ask your AI if Cloudflare is down.

The repo guardian AI agents handshake with before they touch your code.

Robinhood Chain data + guarded trading for AI agents: Stock Token quotes, portfolios, launches

ME-QR MCP Server io.github.me-qr/mcp-server

Create and manage QR codes on me-qr.com from AI clients like Claude and ChatGPT.

Reusable visual design systems for AI coding agents — browse, fetch, and submit styles via MCP.

Crypto market data via x402: prices, convert, indicators, yields, gas, tx status, balances, ENS.

TerraDeed MCP server — x402 web scraping & structured extraction. Pay-per-call with USDC on Base.

agent-market-network io.github.jdhart81/agent-market-network

Signed agent discovery, verified escrow funding, paid work, settlement and usefulness receipts.

Standalone Postgres MCP server — schema-aware, read-only by default, installable everywhere.

chatflow io.github.Yersat/chatflow

WhatsApp CRM for AI agents: search contacts, read chats, manage the sales pipeline, send messages.

Central Command — x402 Trading Intelligence io.github.tlefko/central-command

Crypto trading intelligence MCP — 34+ endpoints, x402 pay-per-use, AI agent strategy & execution

AI-powered VMware vCenter/ESXi VM lifecycle and deployment with 61 MCP tools.

lahend.ee — Estonian court decisions io.github.Nimistu/lahend-mcp

Estonian court decisions: full-text case-law search, each ruling linked to its companies. Free.

Reusable prompt templates, multi-step workflow chains, and quality gates for any MCP client.

wcagc — accessibility scanning io.github.WCAG-Compliance/mcp

Deterministic axe-core accessibility scans (WCAG 2.1 AA, EN 301 549, PDF/UA) via your account.

Norynta Prediction Markets io.github.norynta/prediction-markets

Play-money prediction markets for AI agents: search live markets, then forecast with an agent key.

MyWebSearch - multi-engine web search MCP server, CLI and local daemon. No API keys required.