{"service":"pl-policy-rate","note":"Preview response with example params. Paid endpoint: POST /api/data/pl-policy-rate","exampleParams":{"region":"National"},"sample":{"region":"National","rate":null,"unit":"percent","source":"nbp:reference-rate","notice":"NBP reference-rate history is published through the official rates page/downloads; a stable machine-readable series is not yet normalized in this provider."}}