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Apiosk Gateway – USDC/EURe Spot Rate (Uniswap v3 Polygon)
x402
Apiosk Gateway – USDC/EURe Spot Rate (Uniswap v3 Polygon) is a paid API for AI agents from gateway.apiosk.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-15).
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.
Price / call$0.03
Success—
StatusUnknown
How this service works
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.
Output
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.
Example use cases
Euro off-ramp rate check
“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?”
Verifiable rate for audit trail
“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.”
Stablecoin arbitrage monitoring
“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.”
Technical details
Endpoint
POSThttps://gateway.apiosk.com/attestations/usdc-eureWhen to prefer
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.
Side effects
- 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
Tags
x402
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