Every response says which provider it came from, when, and whether it was cached - so a converted figure in a document can be traced rather than merely trusted. Fifty targets in one call keeps a whole price list to a single round trip.
A currency and crypto rate server with failover across several upstream sources. It resolves currency names loosely, so "bitcoin" and "rupees" work as well as BTC and INR, and every answer carries the rate, its inverse, the source that answered and whether it came from cache.
- Any fiat or crypto pair converted, with the rate, the inverse rate, a timestamp and the source named
- One amount converted into many targets in a single call, with duplicates and same-as-source entries filtered out
- Current rates for a base currency against multiple targets
- A rate as it stood on a past date
- Currency names resolved loosely, so plain words work as well as ISO codes
- Failover across sources, and a cache flag on every response so you know whether the number is fresh
A recent Node. The upstream rate sources need no API keys, so there is nothing to sign up for. Rates are whatever those sources report, and each response names which one answered.
One command plus a key — npm install && npm run start:dev, then supply credentials