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AI and media

Underindex

io.github.ascanioUnderIndex/underindex ยท v0.2.0

Verified records on 60 niche fashion subcultures for AI agents, $0.01 per lookup over x402

Source code Set it up

Connect Runs on your machine

Terminal
claude mcp add underindex -e UNDERINDEX_PRIVATE_KEY=<UNDERINDEX_PRIVATE_KEY> -e UNDERINDEX_MAX_PER_CALL=<UNDERINDEX_MAX_PER_CALL> -- npx -y [email protected]
claude_desktop_config.json
{
  "mcpServers": {
    "underindex": {
      "command": "npx",
      "args": [
        "-y",
        "[email protected]"
      ],
      "env": {
        "UNDERINDEX_PRIVATE_KEY": "<UNDERINDEX_PRIVATE_KEY>",
        "UNDERINDEX_MAX_PER_CALL": "<UNDERINDEX_MAX_PER_CALL>"
      }
    }
  }
}
~/.cursor/mcp.json
{
  "mcpServers": {
    "underindex": {
      "command": "npx",
      "args": [
        "-y",
        "[email protected]"
      ],
      "env": {
        "UNDERINDEX_PRIVATE_KEY": "<UNDERINDEX_PRIVATE_KEY>",
        "UNDERINDEX_MAX_PER_CALL": "<UNDERINDEX_MAX_PER_CALL>"
      }
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "underindex": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "[email protected]"
      ],
      "env": {
        "UNDERINDEX_PRIVATE_KEY": "<UNDERINDEX_PRIVATE_KEY>",
        "UNDERINDEX_MAX_PER_CALL": "<UNDERINDEX_MAX_PER_CALL>"
      }
    }
  }
}

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools

This server runs locally, so its tools are listed by your MCP client once it starts.

Environment variables

NameDescription
UNDERINDEX_PRIVATE_KEY
Optional, secret		Private key of a dedicated EVM wallet holding USDC on Base. Optional: without it get_subculture uses the free allowance of 3 records a day.
UNDERINDEX_MAX_PER_CALL
Optional		Hard spending cap per lookup, default $0.05

Details

Package[email protected] (NPM, stdio)
First published20 Oct 2026
Last updated20 Oct 2026
Registry nameio.github.ascanioUnderIndex/underindex

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