Show HN: X402 Inspector (Find misconfigurations in your x402 API)

Paste an OTLP JSON trace from LangSmith, Langfuse, or OpenTelemetry and see the full agent graph — with per-node token attribution for LangGraph, CrewAI, and OpenAI Agents.

Paste a paid endpoint and validate its x402 payment challenge — HTTP 402 response shape, USDC amount encoding, and Base/Base Sepolia/Solana/Stellar address formats. Flags spec deviations in plain language before you ship.

Enter an agent ID and look up its on-chain identity and reputation — live reads from the ERC-8004 Identity and Reputation registries on Ethereum, Base, Arbitrum, Polygon, Avalanche, and BNB Chain. Beta.

Combines ERC-8004 identity/reputation with x402 payment-challenge validation into a single allow/warn/block decision — check a counterparty before your agent pays it. Pro.