x402-validator is a set of tools including a CLI, MCP server, web dashboard, and proxy for validating x402 payment-enabled API endpoints. It helps developers ensure their services correctly handle blockchain-based payments according to the x402 specification. The package includes comprehensive validation, testing utilities, and integration helpers.
x402-validator is a Developer Tools product. It focuses on validating that API endpoints correctly implement the x402 blockchain payment protocol. x402-validator is an open-source project aimed at developers. The project is open source (MIT). It runs on the command line and the web.
Behind x402-validator is Smartflowpro AI, and the product first shipped in 2026. The project is developed in the open on GitHub with 16 commits in the last 90 days. Among its 4 catalogued features are Endpoint Validation, CLI Interface, and Dashboard UI. It exposes integrations via an MCP server.
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