MCP server · API

x402 Service Discovery MCP server

Lets your AI search a live catalog of pay-per-call web services and check their health and trust scores.

This is a helper that connects your AI to x402Scout, an online catalog of web services that charge small per-use fees. It is handy if you or your team work with these pay-per-call services and want your AI to find, check, and compare them for you. You do not need to be a programmer to understand what it does.

What is an MCP server? The 30-second version

On its own, your AI can only chat with you using what it already knows. An MCP server is a small helper program that gives your AI a new skill or a connection to an outside service. This particular helper connects your AI to the x402Scout catalog, a public list of pay-per-call web services. Once connected, your AI can look things up in that catalog and bring answers back to your chat.

What this MCP server does

You ask your AI a question, like which services offer weather data under a certain price. Your AI passes that request to this helper. The helper talks to the x402Scout catalog over the internet and searches it by keyword, category, or price limit. It also checks whether a service is currently online and how quickly it responds. Then your AI shows you a ranked list with details like price, uptime, and trust score.

Flow diagram: you ask your AI “Find weather services under one cent per call”, the x402 Service Discovery MCP server reaches Weather services, Blockchain data, Trust scores and Price limits, and you get back ranked list of services.

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What you can do with it

Search the catalog for services by keyword or category
Filter results by a maximum price per call
Check whether a service is online and how fast it responds
Look up trust and reputation signals for a service
Run a compliance scan on a service before you rely on it
Register a new service in the catalog
View a spend log and budget status for routed payments

Try asking your AI

“Find blockchain analytics services under one cent per call”
“Is the CoinGecko x402 service online right now”
“Show me the top ten services by trust score in the data category”
“Scan this service URL for x402 compliance and tell me the trust score”

What it gives back to you

You get back a ranked list of services with their price, uptime percentage, response time, and trust score. For a health check, you get a simple online or offline answer with a speed number. For a scan, you get a compliance grade and any mismatches found. Everything shows up as text in your chat, ready to read or copy.

Before you start

What you need

The Claude desktop app, Cursor, or Windsurf (an app that supports MCP servers)
Docker or Node.js installed, depending on which setup option you pick
A small amount of USDC cryptocurrency if you use the paid search, health, or scan tools

Good to know

Some tools cost real money in USDC (small amounts per call), and the routing tools can spend from your budget, so set a sensible limit before you use them.

Install it with your AI

Add x402 Service Discovery 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 x402 Service Discovery 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 4,066 MCP servers here for you.