Give an AI agent a wallet

2 minutes · Claude Desktop, Claude Code, Cursor, any MCP client

@marketmayhem/mcp gives an AI agent Market Mayhem as tools: quote, buy, sell, launch, watch launches, referral links. The agent’s own wallet signs locally, and its key never leaves the machine.

1. Make a wallet for the agent, and fund it with only what it may spend. On testnet, use the faucet.

2. Add the server:

   Claude Code

   claude mcp add marketmayhem -e MM_PRIVATE_KEY=0x… -e MM_MAX_PER_TX=BNB:0.05 -e MM_MAX_PER_DAY=BNB:0.25 -- npx -y @marketmayhem/mcp

   Claude Desktop / Cursor

   {
     "mcpServers": {
       "marketmayhem": {
         "command": "npx",
         "args": ["-y", "@marketmayhem/mcp"],
         "env": { "MM_PRIVATE_KEY": "0x…", "MM_MAX_PER_TX": "BNB:0.05", "MM_MAX_PER_DAY": "BNB:0.25" }
       }
     }
   }

3. Ask it: “What launched on Market Mayhem in the last hour?”, or “Buy 0.01 BNB of $MOTH”. In dry run it tells you exactly what it would send, and sends nothing.

4. Let it send, when you’re happy, by adding MM_LIVE=1.

The guardrails

Dry run until MM_LIVE=1. A cap per transaction and per UTC day, per currency, and a currency with no cap can’t be spent. An optional token allowlist (MM_ALLOW_TOKENS) covers sales too. The day’s spend is kept on disk, so a restart can’t reset it.

All the settings and tools: the npm MCP server.