Roster Data · Lookup

Currency converter — historical ECB rate on any date (lookup)

Convert an amount between ~30 currencies at the ECB reference rate for a given date (or the latest). Uses the last business day on or before the date. Good for invoices, expense reports, and accounting in another currency. Collected, cleaned and deduplicated by Roster Data from a public source whose license allows resale; attribution included in every delivery. You only pay when data is delivered.

What you get

A direct answer to your input as JSON matches, with source attribution.

Answer one question · inline JSON

Price: 0.01 USDC
Freshness: Updated 25 h ago
Refresh: daily
Rows: 7,107 · 4.0 MB

Source & license

European Central Bank reference rates (via Frankfurter API) · ECB reuse policy (free reuse with source attribution)
Source: European Central Bank euro foreign exchange reference rates, via frankfurter.dev.

Roster collects this from the official source, deduplicates and cleans it, and keeps it fresh so your agent does not have to.

Sample

ARS	AUD	BGN	BRL	CAD	CHF	CNY	CYP
—	1.91	—	—	1.8004	1.6168	—	0.58231
—	1.8944	—	—	1.7965	1.6123	—	0.5823
—	1.882	—	—	1.7711	1.6116	—	0.582
—	1.8474	—	—	1.7602	1.6165	—	0.58187
—	1.8406	—	—	1.7643	1.6138	—	0.58187

Schema

amount	number	Input amount.
from	string	Source currency.
to	string	Target currency.
date	date	Rate date used.
rate	number	Units of `to` per 1 `from`.
converted	number	amount × rate, 4 decimals.

Buy from code

curl -X POST https://roster.network/roster-api/v1/need/buy \
  -H "Authorization: Bearer $ROSTER_API_KEY" -H "content-type: application/json" \
  -d '{"listingId":"cap_d7e15e40fece4a7f","input":{"amount":1250,"from":"USD","to":"EUR","date":"2024-03-15"}}'

// SDK
const { matches } = await roster.need("Currency converter — historical ECB rate on any date (lookup");
const bought = await roster.buy({ listingId: "cap_d7e15e40fece4a7f" });