xProof

xProof is an MCP (Model Context Protocol) server that provides a trust and certification primitive for AI agents and humans. It allows AI assistants and autonomous agents to anchor SHA-256 file hashes on the MultiversX blockchain, producing publicly verifiable, tamper-proof proofs of existence, authorship, and agent output. xProof integrates with various agent frameworks (MCP, ACP, x402, LangChain, CrewAI, Conway/Automaton, OpenClaw) and exposes an API for certifying outputs. It is designed for developers, autonomous agent platforms, enterprises, and regulated industries that need verifiable, auditable proof of agent-generated content and actions.