ERC-8004 Agent Discovery MCP server

This is a small helper program that connects your AI assistant to a public registry of on-chain agents. You can ask your AI to find agents that do a certain job, look at their details, and even pay one to do work for you in USDC. It is handy if you are curious about the new world of AI agents that live on blockchains and charge small fees for tasks.

What this MCP server does

You ask your AI something like find agents that can summarize text. Your AI passes that request to this helper. The helper asks a public website called 8004scan for matching agents and hands the list back to your AI. If you then ask your AI to call one of those agents and pay up to a certain amount, the helper sends the request, and if the agent asks for payment, your wallet signs a small USDC payment and tries again. You get the agent's answer back in your chat.

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What you can do with it

• Search for on-chain agents by skill keyword, like summarization or price feed
• Filter results to only agents that say they support x402 payments
• Look up a specific agent's full registration card and services
• Call an agent's web address and pay it in USDC if it asks
• Set a maximum amount of USDC you are willing to pay per call
• Choose which blockchain to use, like Base or Ethereum mainnet

Try asking your AI

• “Find me 5 agents on Base mainnet that can do text summarization, only ones supporting x402.”
• “Show me the full card for agent 25886 on Base.”
• “Call agent 25886 at its endpoint with this article and pay up to 0.05 USDC.”
• “Find agents that do code review and tell me which ones accept USDC payments.”

What it gives back to you

Before you start