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BYTE Library x402 Gateway – DeFi Yields Feed
x402
BYTE Library x402 Gateway – DeFi Yields Feed is a paid API for AI agents from x402.payperbyte.io, paid per call via x402, $0.048829/call, status down (last checked 2026-09-15).
Returns cryptographically signed, EIP-712 provenance-stamped DeFi yield data for AI agents, paid per-call in USDC over x402 with no API key required.
Price / call$0.048829
Success—
StatusDown
How this service works
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 $0.001000).
Output
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).
Example use cases
Verify DeFi yields before rebalancing
“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.”
Find best staking APY with proof
“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.”
Audit yield data for on-chain strategy
“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.”
Technical details
Endpoint
GEThttps://x402.payperbyte.io/feeds/defi-yieldsWhen to prefer
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.
Side effects
- 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
Input
{
"properties": "apy,tvl,protocol"
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
{
"data": [
{
"apy": 2.41,
"pool": "747c1d2a-c668-4682-b9f9-296708a3dd90",
"chain": "Ethereum",
"symbol": "STETH",
"tvlUsd": 14905029229,
"apyBase": 2.41,
"project": "lido",
"apyReward": null
},
{
"apy": 3.6,
"pool": "d8c4eff5-c8a9-46fc-a888-057c4c668e72",
"chain": "Ethereum",
"symbol": "SUSDS",
"tvlUsd": 6112710290,
"apyBase": 3.6,
"project": "sky-lending",
"apyReward": null
},
{
"apy": 2.44,
"pool": "80b8bf92-b953-4c20-98ea-c9653ef2bb98",
"chain": "Ethereum",
"symbol": "WBETH",
"tvlUsd": 5833776973,
"apyBase": 2.44,
"project": "binance-staked-eth",
"apyReward": null
},
{
"apy": 4.74,
"pool": "43641cf5-a92e-416b-bce9-27113d3c0db6",
"chain": "Ethereum",
"symbol": "USDC",
"tvlUsd": 3115251109,
"apyBase": 4.74,
"project": "maple",
"apyReward": null
},
{
"apy": 3.13,
"pool": "7c0a89c7-70cf-460c-b62e-cb278bf97e8f",
"chain": "BSC",
"symbol": "USYC",
"tvlUsd": 2924671386,
"apyBase": 3.13,
"project": "circle-usyc",
"apyReward": null
},
{
"apy": 2.9,
"pool": "46bd2bdf-6d92-4066-b482-e885ee172264",
"chain": "Ethereum",
"symbol": "WEETH",
"tvlUsd": 2857176960,
"apyBase": 2.84,
"project": "ether.fi-stake",
"apyReward": 0.06
},
{
"apy": 2.06,
"pool": "d4b3c522-6127-4b89-bedf-83641cdcd2eb",
"chain": "Ethereum",
"symbol": "RETH",
"tvlUsd": 2261911301,
"apyBase": 2.06,
"project": "rocket-pool",
"apyReward": null
},
{
"apy": 0.01,
"pool": "7e382157-b1bc-406d-b17b-facba43b716e",
"chain": "Ethereum",
"symbol": "WBTC",
"tvlUsd": 1934458714,
"apyBase": 0.01,
"project": "aave-v3",
"apyReward": null
},
{
"apy": 0,
"pool": "db678df9-3281-4bc2-a8bb-01160ffd6d48",
"chain": "Ethereum",
"symbol": "WEETH",
"tvlUsd": 1761298779,
"apyBase": 0,
"project": "aave-v3",
"apyReward": null
},
{
"apy": 3.57,
"pool": "66985a81-9c51-46ca-9977-42b4fe7bc6df",
"chain": "Ethereum",
"symbol": "SUSDE",
"tvlUsd": 1744735885,
"apyBase": 3.57,
"project": "ethena-usde",
"apyReward": null
},
{
"apy": 0,
"pool": "e6435aae-cbe9-4d26-ab2c-a4d533db9972",
"chain": "Ethereum",
"symbol": "WSTETH",
"tvlUsd": 1424471036,
"apyBase": 0,
"project": "aave-v3",
"apyReward": null
},
{
"apy": 2.5,
"pool": "a5d67f7e-5b51-4a9d-969d-caf051a7f5a4",
"chain": "Ethereum",
"symbol": "USDT",
"tvlUsd": 1129118461,
"apyBase": 2.5,
"project": "spark-savings",
"apyReward": null
},
{
"apy": 3.55,
"pool": "ac61ee82-2fe4-4f9b-a9cd-7fb33f598859",
"chain": "Ethereum",
"symbol": "USDY",
"tvlUsd": 1105093111,
"apyBase": 3.55,
"project": "ondo-yield-assets",
"apyReward": null
},
{
"apy": 0,
"pool": "b1986007-81f3-4150-9565-94d5a4066ce4",
"chain": "Ethereum",
"symbol": "CBBTC",
"tvlUsd": 1041415021,
"apyBase": 0,
"project": "aave-v3",
"apyReward": null
},
{
"apy": 2.47,
"pool": "33c732f6-a78d-41da-af5b-ccd9fa5e52d5",
"chain": "Ethereum",
"symbol": "RSETH",
"tvlUsd": 984488926,
"apyBase": 2.47,
"project": "kelp",
"apyReward": null
},
{
"apy": 1.87,
"pool": "9f25a954-db87-4bb2-a8b2-4be0b843a44c",
"chain": "Hyperliquid L1",
"symbol": "KHYPE",
"tvlUsd": 903704473,
"apyBase": 1.87,
"project": "kinetiq-khype",
"apyReward": null
},
{
"apy": 3.46,
"pool": "ff1bb959-d160-4906-bad2-d3e37a1e92e8",
"chain": "Ethereum",
"symbol": "USDS",
"tvlUsd": 865508195,
"apyBase": 3.46,
"project": "centrifuge-protocol",
"apyReward": null
},
{
"apy": 4.35,
"pool": "8edfdf02-cdbb-43f7-bca6-954e5fe56813",
"chain": "Ethereum",
"symbol": "USDT",
"tvlUsd": 839119549,
"apyBase": 4.35,
"project": "maple",
"apyReward": null
},
{
"apy": 3.53,
"pool": "b663ca59-c7e6-4435-ae4a-28d339ce6a15",
"chain": "Ethereum",
"symbol": "BUIDL",
"tvlUsd": 829423460,
"apyBase": 3.53,
"project": "blackrock-buidl",
"apyReward": null
},
{
"apy": 3.19,
"pool": "bd0f5a2a-5d74-40bd-a7db-bf1538b314a2",
"chain": "Aptos",
"symbol": "BUIDL",
"tvlUsd": 821593367,
"apyBase": 3.19,
"project": "blackrock-buidl",
"apyReward": null
},
{
"apy": 0,
"pool": "ae255d3e-5f02-4edd-aab3-ba43eead3a06",
"chain": "Tron",
"symbol": "ETH",
"tvlUsd": 814500614,
"apyBase": 0,
"project": "justlend",
"apyReward": null
},
{
"apy": 0,
"pool": "31e2bebc-85e6-4974-b2e3-7f24675095cf",
"chain": "Tron",
"symbol": "STRX",
"tvlUsd": 754770508,
"apyBase": 0,
"project": "justlend",
"apyReward": null
},
{
"apy": 5.19,
"pool": "9e709e57-84eb-496b-82ce-2e8f6a17db1b",
"chain": "Solana",
"symbol": "BNSOL",
"tvlUsd": 743717355,
"apyBase": 5.19,
"project": "binance-staked-sol",
"apyReward": null
},
{
"apy": 3.47,
"pool": "1910847a-f8b5-40ce-a1ab-1dafdded5fbb",
"chain": "Ethereum",
"symbol": "USTB",
"tvlUsd": 702990052,
"apyBase": 3.47,
"project": "invesco-ustb",
"apyReward": null
},
{
"apy": 5.4,
"pool": "0e7d0722-9054-4907-8593-567b353c0900",
"chain": "Solana",
"symbol": "JITOSOL",
"tvlUsd": 655265998,
"apyBase": 5.4,
"project": "jito-liquid-staking",
"apyReward": null
},
{
"apy": 1.36,
"pool": "e880e828-ca59-4ec6-8d4f-27182a4dc23d",
"chain": "Ethereum",
"symbol": "WETH",
"tvlUsd": 648709686,
"apyBase": 1.36,
"project": "aave-v3",
"apyReward": null
},
{
"apy": 0.36,
"pool": "90d3f42a-8700-4b9f-baa8-090a3c4322c9",
"chain": "Tron",
"symbol": "TRX",
"tvlUsd": 640150642,
"apyBase": 0.36,
"project": "justlend",
"apyReward": null
},
{
"apy": 3.87,
"pool": "54e9b138-3146-4c1f-8dce-1cb948f5ef96",
"chain": "Ethereum",
"symbol": "USDS",
"tvlUsd": 589019819,
"apyBase": null,
"project": "sparklend",
"apyReward": 3.87
},
{
"apy": 2.57,
"pool": "465d177e-3d0d-42c0-b5f5-31c857567135",
"chain": "Ethereum",
"symbol": "LSETH",
"tvlUsd": 582126065,
"apyBase": 2.57,
"project": "liquid-collective",
"apyReward": null
},
{
"apy": 3.5,
"pool": "590d770e-ed5d-4c8d-ad96-5178c2072295",
"chain": "Solana",
"symbol": "BUIDL",
"tvlUsd": 573382480,
"apyBase": 3.5,
"project": "blackrock-buidl",
"apyReward": null
},
{
"apy": 0.33,
"pool": "c9762afb-7746-4b5a-a484-a8881a348999",
"chain": "Ethereum",
"symbol": "LBTC",
"tvlUsd": 566797688,
"apyBase": 0.33,
"project": "lombard-lbtc",
"apyReward": null
},
{
"apy": 1.35,
"pool": "50bb5f69-85ea-4f70-81da-3661a1633fc4",
"chain": "BSC",
"symbol": "SLISBNB",
"tvlUsd": 550745490,
"apyBase": 1.35,
"project": "lista-liquid-staking",
"apyReward": null
},
{
"apy": 3.55,
"pool": "a66e2d12-188b-407d-aaec-d95640e08ef7",
"chain": "Stellar",
"symbol": "USDY",
"tvlUsd": 525701449,
"apyBase": 3.55,
"project": "ondo-yield-assets",
"apyReward": null
},
{
"apy": 2.8,
"pool": "55b0893b-1dbb-47fd-9912-5e439cd3d511",
"chain": "Ethereum",
"symbol": "BUSD0",
"tvlUsd": 507699902,
"apyBase": null,
"project": "usual-usd0",
"apyReward": 2.8
},
{
"apy": 2.51,
"pool": "f981a304-bb6c-45b8-b0c5-fd2f515ad23a",
"chain": "Ethereum",
"symbol": "USDT",
"tvlUsd": 506885412,
"apyBase": 2.51,
"project": "aave-v3",
"apyReward": null
},
{
"apy": 3.5,
"pool": "0906793c-ec02-4c77-9e0e-eee007269d2f",
"chain": "Avalanche",
"symbol": "BUIDL",
"tvlUsd": 444052524,
"apyBase": 3.5,
"project": "blackrock-buidl",
"apyReward": null
},
{
"apy": 0.01,
"pool": "7b13e8df-9e04-4920-a711-6aeef16f9f7c",
"chain": "MegaETH",
"symbol": "USDE",
"tvlUsd": 438900830,
"apyBase": 0.01,
"project": "aave-v3",
"apyReward": null
},
{
"apy": 0.02,
"pool": "71418c17-d2aa-4eff-b68a-806fff9ec951",
"chain": "Tron",
"symbol": "BTC",
"tvlUsd": 412873696,
"apyBase": 0.02,
"project": "justlend",
"apyReward": null
},
{
"apy": 4.04,
"pool": "e0672197-9f3e-4414-bca5-e6b4c90aa469",
"chain": "Base",
"symbol": "GTUSDCP",
"tvlUsd": 406271523,
"apyBase": 4.04,
"project": "morpho-blue",
"apyReward": null
},
{
"apy": 4.8,
"pool": "d783c8df-e2ed-44b4-8317-161ccc1b5f06",
"chain": "Solana",
"symbol": "USDC",
"tvlUsd": 389031415,
"apyBase": 4.02,
"project": "jupiter-lend",
"apyReward": 0.78
},
{
"apy": 5.12,
"pool": "325645ce-4e97-49cb-a8e8-d0100c3aea7b",
"chain": "Ethereum",
"symbol": "USDC",
"tvlUsd": 373918098,
"apyBase": 5.12,
"project": "centrifuge-protocol",
"apyReward": null
},
{
"apy": 1.16,
"pool": "b9f2f00a-ba96-4589-a171-dde979a23d87",
"chain": "Ethereum",
"symbol": "METH",
"tvlUsd": 369811240,
"apyBase": 1.16,
"project": "meth-protocol",
"apyReward": null
},
{
"apy": 5.71,
"pool": "52bd72a7-9e81-4112-abb4-71673e8de9bf",
"chain": "Solana",
"symbol": "JUPSOL",
"tvlUsd": 361245890,
"apyBase": 5.71,
"project": "jupiter-staked-sol",
"apyReward": null
},
{
"apy": 3.6,
"pool": "3637ce7b-529b-49c1-964c-710a50b2939c",
"chain": "Arbitrum",
"symbol": "SUSDS",
"tvlUsd": 359417044,
"apyBase": 3.6,
"project": "sky-lending",
"apyReward": null
},
{
"apy": 3.6,
"pool": "9d499222-a01a-45bb-bbc9-f01c7923693b",
"chain": "Arbitrum",
"symbol": "USDS",
"tvlUsd": 359417044,
"apyBase": 3.6,
"project": "spark-savings",
"apyReward": null
},
{
"apy": 2.44,
"pool": "566c64cb-c1ec-4027-bb67-1e9326d6d48a",
"chain": "BSC",
"symbol": "WBETH",
"tvlUsd": 350401185,
"apyBase": 2.44,
"project": "binance-staked-eth",
"apyReward": null
},
{
"apy": 5.03,
"pool": "3997db8b-3f0c-4774-985d-d9fed3978f53",
"chain": "Solana",
"symbol": "DZSOL",
"tvlUsd": 349223794,
"apyBase": 5.03,
"project": "doublezero-staked-sol",
"apyReward": null
},
{
"apy": 3.83,
"pool": "7820bd3c-461a-4811-9f0b-1d39c1503c3f",
"chain": "Base",
"symbol": "STEAKUSDC",
"tvlUsd": 320794110,
"apyBase": 3.83,
"project": "morpho-blue",
"apyReward": null
},
{
"apy": 3.6,
"pool": "c5c74dd1-995c-4445-9d84-3e710bad7d52",
"chain": "Ethereum",
"symbol": "USDC",
"tvlUsd": 315862631,
"apyBase": 3.6,
"project": "spark-savings",
"apyReward": null
},
{
"apy": 2.4,
"pool": "c032b20d-49bb-4f95-8c8c-ae6333728a6e",
"chain": "Ethereum",
"symbol": "SENPYUSD",
"tvlUsd": 294130882,
"apyBase": 2.4,
"project": "morpho-blue",
"apyReward": null
}
],
"feed": "defi-yields",
"count": 50,
"timestamp": "2026-06-12T04:52:48.945Z"
}Schema · Response
{
"type": "json",
"example": {
"feed": "defi-yields"
}
}Tags
x402
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