Coal - Payments for AI agents

Connects Claude to Coal's programmable commerce layer: browse a decentralized merchant catalog on 0G Storage, create checkout sessions, send gasless USDC payments on Base via x402 or OKX APP envelopes, and verify the full receipt trail anchored on 0G Chain. The server is multi-tenant by design. Every user brings their own wallet key in the X-Coal-Agent-Key header, so no secrets live on the server. Thirteen tools cover discovery (search_products, query_merchant_memory), payment (create_checkout, pay_merchant), and delivery (download_product after verifying on-chain proof). Useful when you want an agent to discover paid content, settle transactions autonomously, and deliver digital goods with cryptographic receipts, all without touching a custody provider.