{"uid":"cap__66t-6mNhS_yuEvSm_cxS","slug":"byte-library-x402-gateway-defi-yields-feed-37b3b785","name":"BYTE Library x402 Gateway – DeFi Yields Feed","description":"Cryptographically attested, first-party data feeds for AI agents — covering crypto markets, DeFi yields, weather, earthquakes, news, code-pulse, threat-intel, address reputation, sanctions screening, and supply-chain verdicts. Every paid response carries EIP-712 receipts you verify before acting: (1) a GATEWAY delivery-integrity receipt (X-BYTE-Attestation header, signed by the PayPerByte gateway key) proving these are exactly the bytes we served; and (2) on the 14 attested feeds (provenance:eip712-attested in GET /feeds), a LIVE per-feed PayloadAttestation by that feed's OWN distinct publisher key, anchored ON-CHAIN — recover it from the broadcast the response references via txHash. (Separately, the POST verdict oracles embed their own per-feed `attestation` directly in the response body — recover attestation.signer.) Both attest authenticity + tamper-evidence under the BYTE Library domain. NEITHER asserts the correctness of the underlying data or any verdict, and NEITHER claims an independent third-party data source signed it — all keys are first-party PayPerByte. Pay per call in USDC over x402 with no API keys — a wallet, not a secret on the box. Settlement is on Base (eip155:8453). Price is per-feed, derived from expected payload size at $0.005000/KB (floor 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cryptographically signed, EIP-712 provenance-stamped DeFi yield data for AI agents, paid per-call in USDC over x402 with no API key required.","exampleAgentPrompt":"Pull the latest DeFi yields feed from BYTE Library — I want the current APY rates across protocols with the cryptographic provenance attestation included, and pay for it automatically from my wallet.","exampleUseCases":[{"title":"Verify DeFi yields before rebalancing","prompt":"Before my portfolio rebalancer makes any moves, pull the latest signed DeFi yield data from BYTE Library — I need the EIP-712 attestation included so I can verify the data wasn't tampered with before we act on it. Pay from my wallet automatically."},{"title":"Find best staking APY with proof","prompt":"Check the current staking and lending APY rates across DeFi protocols using the BYTE Library yield feed — I want the cryptographic provenance receipt so I can trust the numbers, and just settle the micropayment from my Base wallet, no API key setup needed."},{"title":"Audit yield data for on-chain strategy","prompt":"Fetch the latest provenance-stamped DeFi yields from BYTE Library for my on-chain yield strategy — include the EIP-712 payload attestation and the transaction hash so I can anchor and audit the data source on Base before we execute anything."}],"resultDescription":"A JSON payload containing current DeFi protocol yield rates (APY/APR), cryptographically signed and stamped with an EIP-712 PayloadAttestation proving data provenance. The response includes the feed identifier and structured yield data, delivered after a micropayment of ~$0.048829 USDC settled on Base (eip155:8453).","failureModes":["Insufficient USDC balance in wallet — payment fails and data is not returned","Invalid or missing x402 payment header — 402 Payment Required response","Network congestion on Base causing payment settlement delay","Feed temporarily unavailable — service-side error","Wallet not configured for Base network — transaction rejected","Signature verification failure on client side if EIP-712 schema mismatch"],"whenToPreferThis":"Choose this endpoint when you need DeFi yield data that comes with cryptographic provenance guarantees and EIP-712 attestations — ideal for AI agents that must verify data authenticity, for on-chain applications requiring signed data feeds, or when operating in a trustless environment where API-key-based auth is undesirable and micropayment-per-call billing on Base is acceptable.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T13:25:00.204Z","isFirstParty":false}