{"algorithm":"Ed25519","publicKeyHex":"0e1b40472f388090c765bfeb6c67b9eedbfeba7cfb194fdf47f5b2dc333251e6","purpose":"x402 Network-Effect Verify Catalog signing only (separate from the receive wallet's EVM key)","note":"Re-check a registered verify-catalog receipt FREE at POST /v1/verify-catalog/recheck"}