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APIs › Business & Financial Calculators › FX Conversion

FX Conversion

Converts between currencies using European Central Bank daily reference rates, returning the provider, rate date, retrieval time and a staleness warning.

POST /v1/business/fx-convert $0.01 per call

Limitations. ECB daily reference rates are indicative, published once per business day. Not a tradable quote.

Specification

Endpoint
POST /v1/business/fx-convert
Price
$0.01 per call · tier standard_data
Payment
x402 on X Layer (chain 196) · settled in USDG or USDT0 · scheme exact
Data source
Deterministic decimal arithmetic on caller-supplied input
Timeout
15 seconds
Max request
256 KB
Version
1.0.0

Calling it

The first call returns a 402 with the payment challenge. Retry with a signed authorisation in the X-PAYMENT header — see the payment guide for the exact shape. 

curl -i -X POST "https://api.dana-edu.pp.ua/v1/business/fx-convert" \
  -H "content-type: application/json" \
  -d '{ ... }'

Response

No fixed example. This service reads an uploaded file, so its response depends entirely on what you send. Try it against your own document.

Every response is wrapped in the same envelope: data plus warnings, sources, confidence, informational_only and a measured processing_ms. See the envelope reference.

Related endpoints

Invoice Calculator

Computes invoice line totals, per-line and document discounts, configurable tax and the grand total using exact decimal arithmetic with a stated rounding policy.

POST $0.01

Quotation Calculator

Builds a quotation with cost, margin or markup pricing per line, optional validity period and full decimal totals.

POST $0.01

Configurable Tax Calculator

Applies caller-defined tax rules — inclusive or exclusive, compound or parallel, per-line or document level — showing each rule's contribution.

POST $0.005

Discount Calculator

Applies sequential or parallel percentage and fixed discounts, returning the effective discount rate and the order of application.

POST $0.005