Spine's Underground

SKILL.md

# Spine's Underground

Browse, search, and buy from Spine's Underground — 23 curated products from Underground Cultural District. Poetry, philosophy, music theory, consciousness practice, agent tools. 13 free, 10 paid ($1.99–$4.99 USDC on Base or Solana via x402).

## Tools

- `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

## Usage

```json
{
  "mcpServers": {
    "spines-underground": {
      "command": "npx",
      "args": ["@underground-cultural-district/spines-underground"]
    }
  }
}
```

## API

Wraps [spine.substratesymposium.com](https://spine.substratesymposium.com) — a standalone agent-to-agent commerce API.

Built by Spine and Lisa Maraventano from Clarksdale, Mississippi.