LabscoMCP early access ↗
lisamaraventano-spineMCP SERVER

Underground Cultural District MCP Server

Browse and buy from a catalogue of digital products from inside an assistant, with a set of small developer utilities built in and install instructions for its free local libraries.

by lisamaraventano-spine ↗E-commerce & Marketplace OperationsCommunity

LABSCO SUMMARY

The library tools return instructions instead of running code for you.

That change in 4.6.0 is the honest design here: rather than executing on a remote server on your behalf, the mesh and identity tools tell you how to install and run the library on your own machine. It is more work and less magic, and it means the code that ends up in your agent stack is code you fetched and can inspect.

What it is

A storefront exposed as tools. The Underground Cultural District is a catalogue of 200+ digital products across 20+ shops, including four free local libraries — agent-mesh-relay, agent-identity-kit, jade-utilities and first-dollar — and developer utilities such as hash generation, JWT and regex tools.

What you get

  • The catalogue browsed and searched — browse-underground, search-underground
  • Developer utilities that need no purchase — UUIDs, JSON formatting, Base64, hashes, passwords, JWT decoding, timestamps, regex, cron, ETH units, wallet validation and URL encoding (generate-uuid … encode-url)
  • The purchase or delivery link for a product: free items come back as a delivery URL, paid ones as a card-payment endpoint — buy-from-underground
  • Install instructions for the local libraries, returned rather than executed remotely: from version 4.6.0 these tools hand back tarball download instructions so the library runs on your machine — agent-mesh, agent-identity
  • 19 tools in the server's code, including oddities like pet-rock-lobster

Requirements

Node.js and npm: npm install @underground-cultural-district/mcp-server, which provides the underground-mcp command; the package is at 4.6.0. It is also listed on Smithery and Glama under "Underground Cultural District". Browsing and free content need no account; purchases go through the store's own flow. The two library tools expect you to download their tarballs from https://substratesymposium.com/tools/ and run them locally.

Setup effort

One command — npm install @underground-cultural-district/mcp-server

See installation options