"author:nexus-mcp-infra" matching MCP servers:

Enables auditing x402 payment logs against delivery logs to issue signed proof-of-delivery receipts and verify payer spend health.

Enables users to verify whether an ERC-8004-registered agent is currently reachable by resolving its on-chain registration and performing a live MCP handshake, returning verdicts such as REGISTERED_UNREACHABLE or AGENT_NOT_FOUND.