Asic Lookup MCP server

asic-lookup-mcp

An MCP server that looks up Australian companies by ABN, ACN or company name against the ASIC Company Register — about 4 million companies.

It spends your money. USD 0.01 per successful lookup, paid automatically from a wallet you configure. A lookup that matches nothing is free, and so is a malformed one. There is no account and no API key: the payment is the credential, under the x402 protocol, in USDC on Base mainnet.

The server will not start until you have told it a total spend cap.

Install

Nothing to install. Point your MCP client at it with npx and it fetches on first run.

npx @nightshiftbuilds/asic-lookup-mcp is how it runs.

You need a Base mainnet wallet holding a little USDC. You do not need ETH: x402 exact payments are an off-chain EIP-3009 signature settled by a facilitator, so your wallet signs and pays no gas.

Claude Desktop

~/Library/Application Support/Claude/claudedesktopconfig.json on macOS, %APPDATA%\Claude\claudedesktopconfig.json on Windows:

{
  "mcpServers": {
    "asic-lookup": {
      "command": "npx",
      "args": ["-y", "@nightshiftbuilds/asic-lookup-mcp"],
      "env": {
        "SPEND_CAP_USD": "1.00",
        "PRIVATE_KEY_FILE": "/Users/you/.config/asic-lookup/key"
      }
    }
  }
}

Cursor

.cursor/mcp.json in a project, or ~/.cursor/mcp.json globally:

{
  "mcpServers": {
    "asic-lookup": {
      "command": "npx",
      "args": ["-y", "@nightshiftbuilds/asic-lookup-mcp"],
      "env": {
        "SPEND_CAP_USD": "1.00",
        "PRIVATE_KEY_FILE": "/Users/you/.config/asic-lookup/key"
      }
    }
  }
}

Claude Code

claude mcp add asic-lookup \
  --env SPEND_CAP_USD=1.00 \
  --env PRIVATE_KEY_FILE=$HOME/.config/asic-lookup/key \
  -- npx -y @nightshiftbuilds/asic-lookup-mcp

The key file

PRIVATEKEYFILE is preferred over PRIVATE_KEY because a client config file is not a good home for a wallet key — it gets synced, backed up and shared in screenshots.

mkdir -p ~/.config/asic-lookup
printf '0x%s' "$YOUR_KEY_WITHOUT_0X" > ~/.config/asic-lookup/key
chmod 600 ~/.config/asic-lookup/key

Configuration

The cap is counted per server process. Restarting the server resets it, which is worth knowing if your client restarts servers often.

The tool

lookupaustraliancompany — give exactly one of:

Shortened. The full README is on GitHub.