MCP Servers & Tools
The Model Context Protocol (MCP) is how Claude Code, Codex, Cursor and other agents connect to outside tools and data. These listings either ship an MCP server you can connect today or help you build, test and run your own. For approval gates and policy checks, see the Agent Safety & MCP Security collection. 22 tools listed.
Build, Host and Route
SDKs, compilers and gateways for turning an API or a website into an MCP server and running it in production.
NitroStack
Full-stack MCP platform: open-source TypeScript and Python SDKs, an MCP CLI, the NitroStudio desktop app for testing and debugging, and NitroCloud managed hosting for production MCP servers and apps.
Pomerado
Turns any website, from consumer sites to legacy portals, into a hosted API or MCP server for your agents, faster and more reliable than browser agents; open source and backed by Y Combinator.
Bifrost
Open-source (Apache-2.0) AI gateway from Maxim AI: one OpenAI-compatible API for thousands of models with failover, load balancing, semantic caching, virtual keys, budgets and an MCP gateway; Enterprise plan available.
Test and Vet
Run real agents against your server, check what it actually did and look up a third-party server before you install it.
CATT
Consumer Agent Testing Tool: open-source (MIT) Python CLI that runs a scripted or model-driven surrogate assistant (Muse or Instinct emulation, unaffiliated) against your MCP server, MCP app, website or HTTP API, checks what the service actually did and records sealed evidence you can replay and diff in CI.
Gauge CLI
Open-source (MIT) CLI that runs real coding agents against your Skills, CLIs, SDKs, MCP servers and docs, captures where they get stuck and lets your own agent test fixes locally in Docker; part of the Gauge agent-led growth platform.
The MCP Census
Checks public evidence for an MCP server and returns PASS, REVIEW, BLOCK or UNKNOWN before you install or call it; lookup, preflight, whole .mcp.json config audits, a change feed, REST API and its own MCP endpoint, no account needed for stats.
Kerno
AI runtime QA for backends: tests user flows against your real stack from inside MCP-capable coding agents.
Reticle
AI app testing that runs inside your app: it walks a flow like a user and reads network calls, app state and the console so your coding agent can verify its own work; free open-source SDK for Claude Code, Cursor and any MCP agent.
Web, Data and Messaging
Give agents clean web pages, social and messaging channels, your own chats and watermarking over MCP.
Context.dev
Web data API for AI agents: scrape any URL into LLM-ready Markdown, search the live web, crawl and map sites, monitor pages for changes and pull brand data, with SDKs, a CLI and an MCP server; free credits to start.
Zernio
Marketing infrastructure for products and agents: one API and a hosted MCP server for social posts, ads, a unified inbox, WhatsApp, SMS and calls, built on official platform APIs; free up to two accounts.
WhatsApp MCP
Open-source (MIT), read-only MCP server you deploy to your own Cloudflare account so Claude Code or any MCP client can search and read your WhatsApp chats; it can't send messages and is unofficial (uses the WhatsApp Web protocol).
Etchv
Invisible forensic watermarking API for images, PDFs and video, written by a neural model and detectable after resizing and cropping; SDKs for Python, Node.js, Go, Rust, C# and Java plus an MCP server.
Memory and Skills
Keep decisions, context and expert instructions where an agent can recall them mid-task.
DocuMemory
Memory engine for AI-first engineers: distils Claude Code, ChatGPT and Cursor sessions into architecture decisions and prompt-injectable context blocks, recalled over MCP.
Glider
Open-source single-node vector database in Rust that makes every acknowledged write durable in S3-compatible storage, with filtered nearest-neighbor search over an HTTP API, a Python client and an MCP memory server for agents.
Skillstore
Searchable library of engineering skills behind an MCP server: Claude Code and Codex find and load the right expert instructions for the task as they work, and teams can keep a shared private skill library.
ADRs4AI
Method, repo template and VS Code extension for keeping the reasoning from human-AI work in Git: your agent turns your notes into Architectural Deliberation Records and asks open questions with options, a recommendation, rationale, confidence and a falsifier, which you accept or override; the extension's MCP server lets agents query the record.
MCP for the Stack You Already Run
Analytics, databases, a CMS, your Mac and even circuit boards and firmware, all reachable from an agent.
Statable
Privacy-friendly web analytics built for humans and AI agents: a simple dashboard, plus MCP access so Claude, Cursor or Codex can read reports and configure goals and funnels; no cookies, EU-hosted.
TablePro
Free, open-source (AGPL-3.0) native database client written in Swift, pitched as an open TablePlus: connects to 30+ SQL and NoSQL databases through native drivers, with built-in AI chat, inline suggestions and an MCP server for Cursor, Raycast or Claude Desktop (bring your own key or run Ollama). macOS and iOS/iPad; extras like iCloud Sync are paid, Linux version in development.
Hatamoto
Open-source (Apache-2.0) batteries-included CMS that runs as one Go binary next to Postgres 16: visual page builder, SEO panel, page cache, forms, redirects, JSON-LD, sitemaps and llms.txt in core, server-side AI crawler analytics that flag spoofed bots, an MCP server with scoped keys, sandboxed WebAssembly plugins and a WordPress importer that audits every old URL. No telemetry, no paid edition.
Vitals
Activity Monitor alternative for Mac that groups processes by app, tracks coding agent sessions and AI usage limits, finds forgotten dev servers and exposes an MCP server; pay once, no subscription.
ProvenMetal
Quote and order assembled PCBs from Codex or Claude through the ProvenMetal MCP server, at JLCPCB's own instant price with design checks and sourcing of parts JLCPCB doesn't stock.
Chiplab
MCP platform from Veecle that lets AI agents compile, simulate and validate firmware on the actual target chip without physical hardware; in beta.
Building an MCP server or a tool for agents? Featured listings sit at the top of their category for 30 days.
Get your tool featuredWant agents and AI search to find your product? See AI search visibility