Coal - Payments for AI agents

Adds autonomous commerce to Claude through Coal's payment infrastructure on Base. Agents can browse a decentralized merchant catalog on 0G Storage, create checkout sessions, send gasless USDC payments via x402 or OKX APP protocols, and verify receipts anchored on 0G Chain. The server is multi-tenant: each user supplies their own wallet key per request, so no custody or long-lived secrets. Thirteen tools cover discovery (search products, query merchants with natural language), payments (create checkouts, pay with ERC-3009 gasless transfers), and verification (download products after checking on-chain proof). Receipts are independently verifiable by third parties. Reach for this when you want Claude to buy digital goods or pay API paywalls without human intervention.