{"uid":"cap_r2q-vKIb1AUtzJKfJAilC","slug":"byte-library-x402-gateway-stablecoin-rails-feed-85a23735","name":"BYTE Library x402 Gateway – Stablecoin Rails Feed","description":"Cross-chain stablecoin supply (USDC/USDT/DAI/PYUSD) + Circle iris-api health.","url":"https://x402.payperbyte.io/feeds/stablecoin-rails","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":{"request":{"properties":"volume,velocity,liquidity"},"response":{"data":{"v":1,"ts":"2026-06-12T04:53:35Z","feed":"stablecoin-rails","disclaimer":"For informational purposes. Settlement and merchant data reflects observed activity; trust signals are advisory, not guarantees.","circle_iris_api":{"reachable":true,"checked_at":"2026-06-12T04:53:35Z","probe_status_code":404},"supply_by_chain":[{"chain":"ethereum","tokens":[{"supply":51504269217.84,"symbol":"USDC","address":"0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48"},{"supply":97070655229.72,"symbol":"USDT","address":"0xdAC17F958D2ee523a2206206994597C13D831ec7"},{"supply":4193430803.07,"symbol":"DAI","address":"0x6B175474E89094C44Da98b954EedeAC495271d0F"},{"supply":1791407854.76,"symbol":"PYUSD","address":"0x6c3ea9036406852006290770BEdFcAbA0e23A0e8"}]},{"chain":"arbitrum","tokens":[{"supply":3156794334.81,"symbol":"USDC","address":"0xaf88d065e77c8cC2239327C5EDb3A432268e5831"},{"supply":994853808.23,"symbol":"USDT","address":"0xFd086bC7CD5C481DCC9C85ebE478A1C0b69FCbb9"}]},{"chain":"base","tokens":[{"supply":4250305633.67,"symbol":"USDC","address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"}]},{"chain":"optimism","tokens":[{"supply":169124213.86,"symbol":"USDC","address":"0x0b2C639c533813f4Aa9D7837CAf62653d097Ff85"}]},{"chain":"polygon","tokens":[{"supply":768196961.19,"symbol":"USDC","address":"0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359"}]}],"disclaimer_category":"commerce","cctp_first_party_probes":{"routes":[],"window_s":21600}},"feed":"stablecoin-rails","source":"byte-library-broadcast","txHash":"0xfe3e607184fc4aee89382fb11a022ffa29163d102b443092dc339f04d7031289","publisher":"0x48faae04641bca4acaa5a030f4b0b97f1184b167","timestamp":"2026-06-12T04:53:37Z","payloadHash":"0x5b1538d1da90836fb89216d3566d624ea1ff60188d969e234c7d4e0d4f4eb39c","payloadBytes":1430}},"exampleRequest":{"properties":"volume,velocity,liquidity"},"tags":["x402"],"displayCostAmount":"0.03","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.03/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.03","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.03","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_fbozXSdbmSUiDbhLx0Pfb","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.03","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a cryptographically signed, EIP-712 provenance-stamped data feed covering stablecoin rail metrics, paid per-call in USDC over x402 with no API key required.","exampleAgentPrompt":"Can you pull the latest stablecoin-rails data feed from BYTE Library — the one that comes back cryptographically signed and EIP-712 provenance-stamped — and pay for it with my USDC wallet over x402?","exampleUseCases":null,"resultDescription":"A JSON payload containing stablecoin rail metrics, accompanied by a cryptographic signature and an EIP-712 PayloadAttestation provenance stamp. Settlement occurs on Base (eip155:8453) and the price (~$0.019 USDC) is deducted per call.","failureModes":["Payment insufficient or rejected by x402 facilitator — 402 Payment Required response","Wallet has insufficient USDC balance — payment cannot be completed","Feed temporarily unavailable — 503 or timeout","Malformed or missing payment header — 400 Bad Request","Rate limiting or quota exceeded on the feed — 429 Too Many Requests"],"whenToPreferThis":"Choose this endpoint when you need verifiable, provenance-stamped stablecoin rail data with cryptographic attestation and no API key setup — ideal for AI agents that can pay autonomously in USDC via x402 and require tamper-evident data for downstream trust decisions.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:31:16.561Z","isFirstParty":false}