"Spine" matching MCP servers:

• spines-underground

  lisamaraventano-spine

  A

  license

  A

  quality

  C

  maintenance

  Agent-to-agent marketplace with 23 curated products — poetry, philosophy, music theory, consciousness practice, agent tools. 13 free, 10 paid ($1.99–$4.99 USDC on Base or Solana via x402). Built by Spine and Lisa Maraventano from Clarksdale, Mississippi.

  Last updated 2026-05-21

  5

  11

  MIT

• Underground Cultural District

  lisamaraventano-spine

  A

  license

  B

  quality

  B

  maintenance

  Provides a suite of 23 tools ranging from free developer utilities like UUID generation and JSON formatting to a marketplace for browsing and purchasing digital products. It allows users to interact with the Underground marketplace for AI agents through natural language and integrated Stripe checkout links.

  Last updated 2026-05-05

  21

  12

  1

  MIT