BrainChain MCP Server

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

claude mcp add brainchain -e 'BRAINCHAIN_PAYER_KEY=<BRAINCHAIN_PAYER_KEY>' -- npx -y brainchain-mcp

{
  "mcpServers": {
    "brainchain": {
      "command": "npx",
      "args": [
        "-y",
        "brainchain-mcp"
      ],
      "env": {
        "BRAINCHAIN_PAYER_KEY": "<BRAINCHAIN_PAYER_KEY>"
      }
    }
  }
}

[mcp_servers.brainchain]
command = "npx"
args = ["-y", "brainchain-mcp"]
env = { BRAINCHAIN_PAYER_KEY = "<BRAINCHAIN_PAYER_KEY>" }

{
  "mcpServers": {
    "brainchain": {
      "command": "npx",
      "args": [
        "-y",
        "brainchain-mcp"
      ],
      "env": {
        "BRAINCHAIN_PAYER_KEY": "<BRAINCHAIN_PAYER_KEY>"
      }
    }
  }
}

{
  "servers": {
    "brainchain": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "brainchain-mcp"
      ],
      "env": {
        "BRAINCHAIN_PAYER_KEY": "<BRAINCHAIN_PAYER_KEY>"
      }
    }
  }
}

Put your own value in place of <BRAINCHAIN_PAYER_KEY> (Private key of the wallet that pays for tasks, 64 hex characters with or without 0x. Use a wallet that holds only what you plan to spend). The author’s registry entry marks it as required.

Optional settings from the registry entry, left out of the block above: BRAINCHAIN_NETWORK (Which BrainChain network to use: mainnet or testnet. Testnet payments use test tokens with no value), BRAINCHAIN_PAY_ON (Where to pay: robinhood for USDG on Robinhood Chain (one-time Permit2 approval) or base for USDC on Base (Base Sepolia on testnet), which needs no approval), BRAINCHAIN_MAX_PRICE_UNITS (The most the server pays for one task, in the payment token's base units (6 decimals)), BRAINCHAIN_BUDGET_UNITS (The most the server pays in total while it runs, in the payment token's base units (6 decimals). Resets when the server restarts), BRAINCHAIN_DAILY_UNITS (The most the wallet pays per UTC day, in the payment token's base units (6 decimals). Kept on disk, so it holds across restarts. Unset means no daily limit).