code402 / tools / fx-spot-price-oracle

FX spot price oracle — pay-per-call API

Name: code402 — FX spot price oracle
Price: 0.002 USD
Author: code402

$0.002 per call · 20 free calls/day · no signup · pay with card credits or a signed USDC voucher (x402)

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

Honest scope: Deterministic, offline, explainable — no ML, no scraping. The response's scope field states the exact guarantee.

Try it (first 20 calls/day free)

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

No key needed for the free tier. When the free quota is used up, the API replies HTTP 402 with the exact price — agents sign the x402 voucher and retry; humans buy card credits. Every paid response carries a signed receipt you can verify offline.

Run it in the playground (free)Pay by card — credits, no crypto

Input parameters

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

Response

Top-level fields: pair, rate, inverse, timestamp, source. Paid responses also carry a signed XDR-1 receipt.

All code402 tools

Machine-readable catalog: llms-full.txt · MCP manifest · OpenAPI. Operated by JUANA LIMITED (UK Co. No. 14043409). Non-custodial: USDC settles payer→seller directly on Base.