Sealed-bid intent-based crypto trading via MCP for AI agents. Atomic cross-chain settlement on Ethereum, Bitcoin, and Sui using Hash Time-Locked Contracts. Six MCP tools: two RFQ-side for sealed-bid price discovery without information leakage, four HTLC-side for atomic settlement without escrow or bridges. Either both legs settle, or neither does — and refund_htlc exists because counterparty risk is the unsolved problem in OTC. Canonical npm: @hashlock-tech/mcp.