Introducing x402-mcp, a library that integrates with the AI SDK to bring x402 paywalls to Model Context Protocol (MCP) servers to let agents discover and call pay for MCP tools easily and securely.

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x402-mcp is a new library that integrates with the AI SDK to enable micropayments for Model Context Protocol (MCP) tools. It allows developers to create paid MCP servers where AI agents can discover and pay for tool usage with sub-second confirmation times, fees under $0.01, and support for payments as low as $0.001. The library provides simple APIs for defining paid tools and integrating payment capabilities into AI workflows.

402-mcp enables x402 payments in MCP