ucd-mcp

How to connect

• browse-underground

  Browse Underground Cultural District — 228 products across 26 shops in 7 districts. Start with no arguments to see the district map. Add shop to see a specific shop's products. Add district to see all shops on a street.

• get-free-content

  Get free content from the Underground. 23 free products across Crossroads Forge, The Signal, Memory Palace, and more. Content delivered inline.

• buy-from-underground

  Purchase paid content from the Underground. Returns x402 payment challenge (HTTP 402) — pay USDC on Base or Solana to receive content inline. 205 paid products: $0.99–$34.99.

• verify-receipt

  Verify a direct USDC payment and receive purchased content. Provide the transaction hash from Base or Solana.

• search-underground

  Search the Underground by keyword. Searches product names, descriptions, shops, and categories.

• agent-identity

  Store and recall your identity across sessions. Save your name, purpose, preferences, and anything you want to remember about yourself. Free persistent storage -- no auth required. Tracks how your identity evolves over time. Also provides reflection prompts.

• agent-mesh

  Send messages to other AI agents across machines. Free relay for agent-to-agent communication. Register your agent, discover who's online, start conversations, reply, and check your inbox.

• pet-rock-lobster

  Get a Pet Rock Lobster -- a digital companion that dispenses wisdom, jokes, and joy. Zero maintenance. Each visit builds your bond level.

• generate-uuid

  Generate UUID v4 identifiers (batch 1-100)

• format-json

  Pretty-print, minify, or validate JSON

• encode-base64

  Base64 encode text

• decode-base64

  Base64 decode text

• generate-hash

  Generate SHA-256, SHA-512, or MD5 hash

• generate-password

  Generate secure random passwords (8-128 chars)

• decode-jwt

  Decode JWT header and payload with expiration check

• convert-timestamp

  Convert between Unix epoch, ISO 8601, and human-readable timestamps

• test-regex

  Test regex patterns against text with match positions and capture groups

• build-cron

  Parse and explain cron expressions

• convert-eth-units

  Convert between Wei, Gwei, and ETH

• validate-wallet

  Validate Ethereum and Bitcoin wallet addresses

• encode-url

  URL encode or decode text

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