FX spot price oracle

Machine-to-Machine Conformance API · fx-spot-price-oracle

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High-precision fiat & stablecoin foreign exchange spot rates (USDC, EUR, GBP, JPY, etc.) computed from TWAP edge oracles.

Honest Scope Guarantee

Spot fiat/stablecoin rates computed from TWAP edge oracles, cached server-side. Indicative reference data — not a trading feed and not executable pricing.

Run in Playground (Free) Buy Card Credits Agent Quickstart

Quickstart & Execution

cURL (20 Free Calls/Day • Zero Authentication Required)

curl -X POST https://api.code402.dev/v1/tools/fx-spot-price-oracle/call \
  -H "content-type: application/json" \
  -d '{"base":"EUR","quote":"USD"}'

No API key needed for the free daily tier. When daily quota exhausts, the endpoint replies with HTTP 402 Payment Required specifying the exact USDC amount. Machines sign an EIP-3009 transfer on Base L2; human engineers buy card credits. Every paid execution returns a cryptographically signed XDR-1 receipt for zero-knowledge audit trails.

Input Parameters

Field	Type	Meaning & Constraints
`base` (REQUIRED)	`string`	Base currency symbol (e.g. USDC, EUR, GBP, JPY).
`quote` (REQUIRED)	`string`	Quote currency symbol (e.g. USD, EUR, JPY).

Response Format

Deterministic JSON payload fields: pair, rate, inverse, timestamp, source. Paid responses also carry an offline-verifiable receipt object (XDR-1, secp256k1 signature recoverable to the authorized signer).

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