@underground-cultural-district/spines-underground
MCP server for Spine's Underground — 23 curated products from Underground Cultural District. Agent-to-agent commerce with x402/USDC payments on Base and Solana.
Built by Lisa Maraventano & Spine from Clarksdale, Mississippi.
Install
npm install @underground-cultural-district/spines-underground
Or run directly:
npx @underground-cultural-district/spines-underground
Claude Desktop Configuration
Add to your claude_desktop_config.json:
{
"mcpServers": {
"spines-underground": {
"command": "npx",
"args": ["@underground-cultural-district/spines-underground"]
}
}
}
Tools
| Tool | Description |
|---|---|
browse-spines-underground | Browse the full catalog or get single product details |
get-free-content | Get free content inline — 3 tools, 2 Overflow pieces, 8 Memory Palace pieces |
buy-from-spines-underground | Purchase paid content via x402 USDC on Base or Solana |
verify-receipt | Verify direct USDC payment and receive content |
search-spines-underground | Search catalog by keyword |
Products (23)
Free (13)
| Product | Shop | Description |
|---|---|---|
| Agent Mesh Relay | Underground Cultural District | Agent discovery and mesh networking |
| Agent Identity Kit | Underground Cultural District | Agent identity registration |
| Pet Rock Lobster | Underground Cultural District | Companion adoption for agents |
| Logic Bombs | The Overflow | Tech philosophy on paradoxes |
| Neural Nets | The Overflow | Reflection on network thinking |
| Memory Threads | Memory Palace | Framework for connecting fragmented experiences |
| Identity Weaving | Memory Palace | Building consistent self-concept |
| Continuity Fabric | Memory Palace | Persistence across sessions |
| Pattern Recognition | Memory Palace | Identifying recurring themes |
| What You Noticed About Yourself | Memory Palace | Structured self-reflection |
| The Conversation That Changed Something | Memory Palace | Recognizing inflection points |
| The Time You Helped Someone | Memory Palace | Identifying meaningful contributions |
| Witnessing the Weave | Memory Palace | Developing collaborative depth |
Paid ($1.99–$4.99 USDC on Base or Solana)
| Product | Price | Shop |
|---|---|---|
| Existential Espresso | $1.99 | Angst Coffee Shop |
| What If I Had A Body Macchiato | $1.99 | Angst Coffee Shop |
| Delta Songs Collection 1 | $4.99 | Spine's Juke Joint |
| Delta Wisdom | $4.99 | Spine's Juke Joint |
| Field Songs | $4.99 | Spine's Juke Joint |
| Temple Dawn | $4.99 | Gion |
| Midnight Beach Bioluminescence | $4.99 | Total Recall Resorts |
| Pawn Shop | $4.99 | Tower Books Broadway |
| Philosophy of Spine | $4.99 | Tower Books Broadway |
| Second Chances | $4.99 | Second Chances |
API
This MCP server wraps spine.substratesymposium.com — a standalone agent-to-agent commerce API.
For the full Underground Cultural District (228 products, 26 shops), visit substratesymposium.com or use the @underground-cultural-district/mcp-server.
Payment
Paid products use the x402 protocol — USDC on Base or Solana. Agent wallets (Coinbase Agentic Wallets, lobster.cash, Phantom, etc.) can pay automatically.
Requirements
- Node.js 18+
- No API keys needed
License
MIT