Turns any MCP tool into a paid endpoint where AI agents pay per call in USDC on Solana via the x402 protocol. Ships with a complete stack: SDK for wallet primitives and USDC transfers, an HTTP paywall middleware that returns 402 status codes with payment requirements, and a self-hosted facilitator that verifies signatures and submits settlements to Solana in around 1.5 seconds. You declare a price on each tool, the agent signs a payment payload, and settlement happens automatically with sub-cent fees. Includes an Eliza plugin for Solana native agents, Vercel AI SDK helpers, and a real stdio MCP bridge for Claude Desktop. The two agent demo shows Claude Opus autonomously paying for string reversal and word count tools, with on-chain proofs linked in the output.
claude mcp add --transport stdio krystiangw-agenticpay uvx agenticpay