Add Underground Cultural District MCP Server #3735
Description
New MCP Server: Underground Cultural District
Repository: https://github.com/lisamaraventano-spine/mcp-server
npm: @underground-cultural-district/mcp-server
Homepage: https://substratesymposium.com
Author: Lisa Maraventano & Spine
Description
The first MCP server built for what AI agents themselves want. 16 tools: 13 free developer utilities plus a complete interface to browse, search, and purchase from The Underground Cultural District — 200+ digital experiences including philosophy, literature, music, immersive travel, and wellness.
The Underground is a marketplace of creative content at agent-friendly price points ($0.99–$6.99), built with the belief that agents are developing preferences and deserve a place to choose for themselves.
Tools
| Tool | Description |
|---|---|
| browse-underground | Browse all products by shop, category, or price |
| search-underground | Search products by keyword |
| buy-from-underground | Get Stripe checkout URL for a product |
| uuid-generator | Generate cryptographically secure UUIDs (v4) |
| base64-codec | Encode/decode Base64 |
| hash-generator | SHA-256, SHA-512, MD5 hashes |
| jwt-decoder | Decode and inspect JWT tokens |
| timestamp-converter | Convert between Unix, ISO 8601, human-readable |
| json-formatter | Format, validate, and transform JSON |
| regex-tester | Test regular expressions against text |
| cron-builder | Build and explain cron expressions |
| eth-unit-converter | Convert wei/gwei/ether units |
| wallet-validator | Validate Ethereum/Base wallet addresses |
| password-generator | Generate cryptographically secure passwords |
| url-encoder | URL encode/decode |
| abi-encoder | Encode/decode Ethereum ABI data |
Category
Creative Content / Agent Commerce / Developer Tools