MCP serverOfficial registry

402 LAB

Budget-capped x402 buyer: delegate USDC in plain words, agent discovers and pays per call.

by io.github.Kairose-masterv0.1.0GitHub Website

Power your agent

Add this server

The publisher's own command. Not a PlugMCP endpoint.

Local command

mcpb https://github.com/Kairose-master/handsel-mandate/releases/download/mcp-v0.1.0/402-lab.mcpb

Credentials from the publisher

BUYER_PRIVATE_KEY — 0x-prefixed private key of the paying wallet (keep only small amounts)
NETWORK — eip155:84532 (Base Sepolia, default) or eip155:8453 (Base mainnet)
MANDATE_MAX_USDC — Absolute cap any mandate may reach
CATALOG_URLS — Comma-separated seller product.json URLs searched besides the x402 Bazaar

Provider

Claude Code

BUYER_PRIVATE_KEY=<secret> NETWORK=<value> MANDATE_MAX_USDC=<value> CATALOG_URLS=<value> claude mcp add io.github.kairose-master-402-lab -- mcpb https://github.com/Kairose-master/handsel-mandate/releases/download/mcp-v0.1.0/402-lab.mcpb

Run in a terminal.

Claude Desktop

{
  "mcpServers": {
    "io.github.kairose-master-402-lab": {
      "command": "mcpb",
      "args": [
        "https://github.com/Kairose-master/handsel-mandate/releases/download/mcp-v0.1.0/402-lab.mcpb"
      ],
      "env": {
        "BUYER_PRIVATE_KEY": "<secret>",
        "NETWORK": "<value>",
        "MANDATE_MAX_USDC": "<value>",
        "CATALOG_URLS": "<value>"
      }
    }
  }
}

claude_desktop_config.json

Step-by-step: add this in Claude

Remote URL or a command on your machine? How the two installs differ

Run on PlugMCP

Host a copy with our keys and logs.

A new server you create. It is not this listing's official endpoint. Use the publisher install when you want their URL and their credentials.

Launch

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402 LAB

Add this server

Host a copy with our keys and logs.

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