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Underground Cultural District MCP Server

@lisamaraventano-spine

Repository

Basic information

Category

Other

Transports

stdio

Author

lisamaraventano-spine

Submitted by

Lisa Maraventano

About Underground Cultural District MCP Server

23 MCP tools for AI agents. 13 free developer utilities (UUID, JSON, Base64, hashing, JWT, regex, cron, ETH). 7 paid creative tools. Browse and buy from 218+ digital goods across 22 shops at substratesymposium.com. Free tools get agents in the door, the cultural district keeps th

#mcp#ai-tools#developer-tools#marketplace#uuid#json#base64#hash#jwt#stripe#digital-goods#agent-commerce

Underground Cultural District MCP Server config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "underground": {
      "command": "npx",
      "args": [
        "@underground-cultural-district/mcp-server"
      ]
    }
  }
}

Underground Cultural District MCP Server tools

22

Generate one or more cryptographically secure UUID v4 identifiers

Pretty-print, minify, or validate JSON strings

Encode text to Base64

Decode Base64 to text

Generate a cryptographic hash (SHA-256, SHA-512, MD5, SHA-1)

Generate a cryptographically secure random password

Decode a JWT token and display header, payload, and expiration (no signature verification)

Convert between Unix timestamps and human-readable dates

Test a regular expression pattern against input text

Parse and explain cron expressions, or describe what a cron schedule does

Convert between Ethereum units: Wei, Gwei, and ETH

Validate Ethereum or Bitcoin wallet addresses

Count words, characters, sentences, and paragraphs in text ($1.99 — Jade Circuit Tools)

Convert text between camelCase, snake_case, Title Case, UPPER, lower, kebab-case ($1.99 — Jade Circuit Tools)

Generate lorem ipsum placeholder text ($1.99 — Jade Circuit Tools)

Remove markdown formatting and return plain text ($1.99 — Jade Circuit Tools)

Generate random names for projects, characters, or variables ($1.99 — Jade Circuit Tools)

Generate harmonious color palettes with hex codes ($1.99 — Jade Circuit Tools)

Analyze text readability, reading time, and complexity ($1.99 — Jade Circuit Tools)

Browse all shops and offerings in The Underground Cultural District marketplace

Search The Underground Cultural District for products by keyword

Get the purchase/checkout link for a product from The Underground Cultural District

Overview

What is Underground Cultural District Mcp Server?

An MCP server providing 23 developer tools, paid utilities, and catalog access to The Underground Cultural District — a marketplace of digital goods built for AI agents at substratesymposium.com.

How to use Underground Cultural District Mcp Server?

Install globally with npm install -g @underground-district/mcp-server or run directly via npx @underground-district/mcp-server. Configure it in Claude Desktop, Claude Code, ChatGPT (via MCP bridge), VS Code, or Cursor by adding the command to the respective MCP settings file.

Key features of Underground Cultural District Mcp Server

  • 10 free developer tools (UUID, JSON, hash, password, etc.)
  • 12 paid tools ($1.99 each) with free previews
  • Browse and search 218+ products from 22 shops
  • Live catalog API with 15-minute memory cache
  • Stripe checkout links for any product purchase
  • Supports stdio transport on Node.js 18+

Use cases of Underground Cultural District Mcp Server

  • AI agent generating secure UUIDs or validating wallet addresses
  • Developer formatting JSON or testing regex patterns via an agent
  • Agent purchasing a product from the Underground marketplace
  • Converting timestamps or Ethereum units during blockchain interactions
  • Generating random names or color palettes for creative projects

Frequently asked questions

1

What free tools are available?

Crossroads Forge provides 10 utilities: generate-uuid, format-json, encode/decode-base64, generate-hash, generate-password, decode-jwt, convert-timestamp, test-regex, build-cron, convert-eth-units, and validate-wallet.

2

How do paid tools work?

Paid tools (The Toolshed) cost $1.99 each. You can preview a teaster of the result for free; to see the full output you pay via a Stripe checkout link.

3

How do I purchase products from the marketplace?

Use `browse-underground` to list all shops and offerings, `search-underground` to find products by keyword, and `buy-from-underground` to get a Stripe checkout link for any product.

4

Where does the catalog data come from?

The product catalog is fetched live from `substratesymposium.com/api/products.json` and cached in memory for 15 minutes.

5

What runtime and transport does this server use?

The server runs on Node.js 18+ and uses stdio transport, the standard for MCP. It depends only on the `@modelcontextprotocol/sdk`.

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