Narodowy Bank Polski Exchange Rate API

Official Narodowy Bank Polski (Poland) daily exchange rates as JSON: 35 currencies, history back to 2016. The published PLN rates required for tax, audits, and compliant invoicing.

Quick start

One request for the pair you need — EUR to PLN at the official Narodowy Bank Polski rate:

curl "https://allratestoday.com/api/v1/central-bank/nbp/latest?source=EUR&target=PLN" \
  -H "Authorization: Bearer art_live_your_key"

Or the bank's full published table:

curl "https://allratestoday.com/api/v1/central-bank/nbp/latest" \
  -H "Authorization: Bearer art_live_your_key"

On paid plans, any historical date or a daily time series:

curl "https://allratestoday.com/api/v1/central-bank/nbp/history?source=EUR&target=PLN&from=2025-01-01" \
  -H "Authorization: Bearer art_live_your_key"

Latest published rates (2026-07-28)

The most recent table as published by Narodowy Bank Polski — exactly what the /latest endpoint returns right now. Values are PLN per 1 unit of each currency:

Why use the official Narodowy Bank Polski rate?

Live market rates move continuously, but tax filings, customs declarations, audits, and statutory accounting in Poland and beyond typically require the official rate published by Narodowy Bank Polski for a given date — a fixed, citable number that never changes after publication. This API serves those published tables with the bank's own rate_date on every response; weekends and holidays return the most recent published date, which is the rate compliance rules require you to apply.

Pairs the bank doesn't print directly are resolved from its table (inverse or cross via PLN) and explicitly flagged "derived": true — so what the bank printed and what was computed are never confused.

Endpoints

• GET /api/v1/central-bank/nbp/latest — latest table or single pair (all plans)
• GET /api/v1/central-bank/nbp/{YYYY-MM-DD} — the table for any date (paid plans)
• GET /api/v1/central-bank/nbp/history — daily time series, up to 5,000 rows (paid plans)

Full parameter reference in the API documentation. Every request counts toward your plan's monthly quota — rates change once per business day, so caching a day's table locally makes a small quota go far.

Frequently asked questions

Is there an API for Narodowy Bank Polski exchange rates?

Yes — this one. Official daily PLN rates as clean JSON, latest table on every plan including free.

How often are the rates updated?

Narodowy Bank Polski publishes once per business day; the API ingests each new table shortly after publication (latest: 2026-07-28).

Are these the official rates?

Yes — ingested from Narodowy Bank Polski's own published data, served unmodified with the bank's publication date. Anything computed rather than published is flagged derived.

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