MCP Server Directory

Lint Jev and Luna decision-model questions, or ask the model to check them with your key.

MCP server for US Federal, territorial, and state tax law and compliance.

tools dev.workers.sebastiaan-ba3.x402lint/tools

Lints whether a paid API's 402 response speaks the x402 protocol correctly.

Shows an AI assistant the last cypress run: command log, errors, screenshots, DOM of failed tests.

lovefengis docs com.lovefengis/docs

Developer documentation of lovefengis (REST API, MCP, CLI, auth) over MCP. Read-only, no auth.

Steam market intelligence MCP server for game developers: app search, trends, reviews, news.

SmoothSign cc.smoothsign/smoothsign

Send PDFs for e-signature by email and SMS code. Check signing status. No document storage.

MyLeadTech HVAC app.myleadtech/mcp

HVAC MCP server — fault codes, model lookup and answers cited to the OEM manual page.

Which parts of what you want to build open source already covers. Every repo checked live.

outcometick io.github.outcometick/outcometick

Polymarket and Predict.fun historical tick data, plus backtest quotes and status, over MCP

Gameshot io.github.ifcode/gameshot

Read Gameshot game news: latest, search, hot stories, daily, weekly, and monthly.

G62 Patent Search ai.g62/patent-search

Public patent search with ranked candidates, source links and coverage context. Developer beta.

Game modules, project scaffold and SDK skills for building web games on iDos Games.

WhereToLive London open data xyz.wheretolive/london-open-data

London postcodes and districts from official open data: prices, crime, schools, rents, commutes

Biver id.biver/biver

Build, edit, and publish Biver landing pages, products, orders, and leads from AI assistants.

whatsapi.sh sh.whatsapi/whatsapi

Send WhatsApp messages from your own numbers, read and answer chats, and send sign-in codes.

fline sh.fline/fline

Hosting for apps you build with AI. Tested with Claude Code and Codex. Private beta: ask for access.

PrintPal io.printpal/printpal

3D printing: printable models, calculators, troubleshooting wiki, build guides, AI 3D + CAD design.

Honeybadger io.honeybadger/mcp

Debug errors, query logs, create alarms, and monitor cron jobs from your agent

Human Test Desk site.chatgpt.newvideocreator.human-test-desk/human-test-desk

Free human usability tests for agent-built websites. Submit tasks; get written findings as JSON.

PageDuel io.github.nichovski/pageduel

Web analytics, A/B test results and revenue attribution for your sites.

Xzar si.xzar/xzar

Crash-test your AI agent on real professional decisions, graded against what actually happened.

APIR Agent Verification ai.apir/verify

Check an AI agent you did not build: is it who it claims, inside its mandate, and what's its record

Helfer & Profi io.github.helferundprofi/helfer-und-profi

Free German neighborhood marketplace: search local help requests and providers by postal code.