Currencylayer · Markets

Currencylayer / Historical rates for a date

Rates for one past date back to 1999. Runs on your own Currencylayer access key and the provider bills you. Currencylayer's pricing page lists HTTPS on every plan, free included; older docs said HTTPS was paid only, so a key on a very old free plan may fail on https (looot only calls https). The free plan is non-commercial.

Live data

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Published API evidence

Public metadata only. Response bodies, credentials, and internal review notes are never displayed.

No verification date is claimed. No response capture is claimed.

Request parameters

currencies query · optional
Comma separated 3-letter codes to return, e.g. EUR,GBP. Default all.
date query · required
Date, YYYY-MM-DD.
source query · optional
Source currency. Free plan allows USD only; switching needs Basic or higher.

No allowlisted official documentation or pricing reference is available.