{"uid":"cap_FnClVjBKBcagPerQuot_X","slug":"apiosk-gateway-usdc-eure-spot-rate-uniswap-v3-polygon-5901993a","name":"Apiosk Gateway – USDC/EURe Spot Rate (Uniswap v3 Polygon)","description":"Signed USDC/EURe spot rate read directly from the EURe/USDC 0.30% Uniswap v3 pool on Polygon (mid-price from sqrtPriceX96). The on-chain rate behind the euro off-ramp; the envelope carries the exact eth_call slot0() so the number is independently re-checkable. Excludes the pool fee and slippage.","url":"https://gateway.apiosk.com/attestations/usdc-eure","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.033","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","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_McFzaAxDE5q-m-LJHv_J5","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 mid-price spot rate for USDC/EURe derived directly from the EURe/USDC 0.30% Uniswap v3 pool on Polygon via slot0() sqrtPriceX96.","exampleAgentPrompt":"What's the current on-chain USDC to EURe mid-price right now? I need a signed, independently verifiable rate pulled straight from the Uniswap v3 EURe/USDC pool on Polygon.","exampleUseCases":[{"title":"Euro off-ramp rate check","prompt":"Before I convert my USDC to euros, can you grab the current on-chain EURe/USDC rate from the Uniswap v3 Polygon pool so I know exactly what mid-price to expect before fees and slippage?"},{"title":"Verifiable rate for audit trail","prompt":"I need a cryptographically signed USDC-to-EURe spot rate with the raw slot0 sqrtPriceX96 data attached so my compliance team can independently re-verify the number on-chain."},{"title":"Stablecoin arbitrage monitoring","prompt":"Fetch me the signed mid-price for EURe priced in USDC from the Uniswap v3 0.30% pool on Polygon — I want to compare it against a CEX EUR/USD rate to spot any arbitrage gap."}],"resultDescription":"A signed attestation envelope containing the mid-price spot rate for USDC/EURe computed from sqrtPriceX96 returned by slot0() on the EURe/USDC 0.30% Uniswap v3 pool on Polygon. Includes the raw eth_call data so the price is independently re-checkable on-chain. Does not include pool fee or slippage.","failureModes":["Polygon RPC unavailable – eth_call to slot0() fails, endpoint returns an error","Pool liquidity too low to produce a reliable mid-price","Payment not settled via x402 – returns HTTP 402","Stale block data if node is behind – rate may lag by a block","Invalid or missing payment header – request rejected"],"whenToPreferThis":"Choose this endpoint when you need a cryptographically signed, independently verifiable USDC/EURe mid-price sourced directly from on-chain Uniswap v3 slot0() data on Polygon — particularly for euro off-ramp pricing, DeFi arbitrage, or compliance audit trails where a trusted off-chain API quote is insufficient. Prefer over generic forex APIs when on-chain provenance and re-checkability matter.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:52:26.752Z","isFirstParty":false}