npm · @three-ws/x402-mcp
$npx -y @three-ws/x402-mcp@0.2.3 SOLANA_SECRET_KEY · secret — Base58 (or JSON byte-array) Solana secret key that signs payments and holds the USDC. Not needed for the read tools (find_services, inspect_endpoint, or x402_wallet with an explicit address). Treat like cash.
SOLANA_RPC_URL — Solana mainnet RPC endpoint. Defaults to the public cluster — bring your own (Helius / Quicknode / Triton) for production traffic.
MAX_PAY_USD — Max USD a single pay_and_call may spend. Bounds a runaway or injected payment.
REQUIRE_CONFIRM — When on (default), pay_and_call refuses until re-issued with confirm:true. Set 0/false to disable the gate.
THREE_WS_BASE — Base URL of the three.ws API that serves /api/bazaar/search for find_services. Override only when self-hosting.