MCP Server Directory

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

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

MyLeadTech HVAC app.myleadtech/mcp

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

G62 Patent Search ai.g62/patent-search

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

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

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

Read-only tools for AI agents: who can change a smart contract, how fast. Signed data, testnet.

Lets an AI agent edit vertical 9:16 video ads from your footage, a reference ad or an idea.

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.

Query the Google Fonts Developer API: font list, search, family details.

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

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.

No Niner Data Tools io.github.fredxhansson-cmyk/noniner

No-code web scraping & data-extraction Apify actors: scrape and enrich web data at scale.

clear-line-ops io.github.mfarrell628/clear-line-ops

150+ hosted tools: describe-to-build CAD, scan-to-CAD, architecture studio, web research, media.

attest — verification for AI agent artifacts io.github.mrpkk/attest

Verify an AI agent artifact: schema, emptiness, provenance and mandate authority, Ed25519-signed.

Build platform-ready carousels from an outline.

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

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

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

canonicalhash io.github.Mlartab2/canonicalhash

Deterministic JSON hashing and EIP-712 attestations for AI agents via x402.

HorizonX — Premium UI Library io.github.Mdx2025/horizonx

Animated UI components, shaders, templates and UI kits from HorizonX, exported into your code

Befana Recipes app.befana/befana

Ad-free recipes with amounts in every step: search, scale, plan meals, build shopping lists.