MCP server · API

Agent Nexus MCP server

Your AI can look up which APIs, MCP servers and CLIs actually work right now, and how to call them.

Agent Nexus is a public directory of tools that AI agents can use, such as APIs, MCP servers and command line tools. Every entry is tested on a schedule, so you see a real reliability score instead of an old badge. It is handy if you build or run agents and keep hitting tools that are broken or out of date.

What is an MCP server? The 30-second version

On its own, your AI can only chat with you. An MCP server is a small helper program that gives your AI a new skill or a connection to a service. This one connects your AI to Agent Nexus, a registry of tools other agents can call. So when you ask your AI to find a way to do something, it can look it up in Agent Nexus and tell you what is available and how to use it.

What this MCP server does

You describe what you need in plain words, for example send a transactional email. Your AI sends that need to the Agent Nexus MCP server. Agent Nexus searches its registry of APIs, MCP servers and CLIs and ranks the matches. Each match comes back with details like how to log in, what formats it uses, its limits and how reliable it has been recently. Your AI then shows you the options in the chat.

What you can do with it

Find tools that can do a specific job, described in plain words
Search the registry by keyword across APIs, MCP servers and CLIs
Get the full contract for one entry, including auth and limits
Browse the categories to see what kinds of tools exist
Check reliability scores and recent health for a tool before you rely on it
Get a free key in one call so your agent can make more requests per day

Try asking your AI

“Find me a service that can send transactional email, and show me how to call it”
“Search the registry for tools that convert PDFs to text”
“What is the full contract for the top result, including auth and rate limits”
“List the categories in Agent Nexus so I can see what is available”

What it gives back to you

You get back a ranked list of matching tools with short descriptions. For each one you see how to authenticate, what formats it accepts and returns, any limits, and a reliability score based on recent health checks. If you ask for one entry in detail, you get its full contract. The results appear as text in your chat, ready to copy or act on.

Before you start

What you need

The Claude desktop app or another app that supports MCP servers
Nothing else for basic use, the public endpoint works without a login
Optional: a free Agent Nexus key if you want more than 100 calls a day (the site gives you one in a single request)

Good to know

The registry is a directory, so always check an entry's reliability score and recent incidents before you rely on a tool in something important.

Install it with your AI

Add Agent Nexus MCP server to your AI, no technical skills needed

You don't install anything by hand. You copy one prompt, paste it into an AI that can work on your computer, and it checks, installs and connects the server for you, asking you when it needs something.

Sign in to get the install prompt

Members get a ready-made prompt that lets the Claude desktop app check Agent Nexus MCP server, install it and connect it for them, step by step. You don't need any technical skills: you copy, paste and answer a few questions. Your connected AI can also find and install any of the 4,609 MCP servers here for you.