Currency Converter API

Convert any amount between 160+ currencies in a single REST call, with live mid-market rates refreshed every 60 seconds. The converter below runs on that same endpoint — try it, then take the call.

curl "https://allratestoday.com/api/v1/rates?source=USD&target=EUR&amount=1000" \
  -H "Authorization: Bearer YOUR_API_KEY"

Convert endpoint · Free API key · Official central bank rates

Exchange Rate Trend

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Currency Converter API: the same rates, in one call

This converter is a thin layer over two APIs. Both return JSON, both take one HTTP call, and both have a free tier — no credit card.

Mid-market exchange rate API

The live interbank midpoint — the number shown above. It moves continuously and is refreshed every 60 seconds across 160 currencies. Use it for pricing, checkout, display and anything a customer sees.

curl "https://allratestoday.com/api/v1/rates?source=USD&target=EUR" \
  -H "Authorization: Bearer YOUR_API_KEY"

[{ "rate": 0.8643, "source": "USD", "target": "EUR",
   "time": "2026-08-16T11:01:24+0000" }]

Several targets at once — target=EUR,GBP,JPY returns one row per pair in a single call.
Historical — /api/historical-rates for a date range, or ?time=YYYY-MM-DD for one past day.
Four formats — add ?format=csv, xml or xlsx to get a file instead of JSON.

Endpoint reference · Get a free key

Central bank rate API

The rate a named institution actually published for a given date, from 102 central banks and 3 tax authorities. Unlike a mid-market rate it never changes after publication, which is what tax filings, customs valuations and audits require.

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

{ "bank": "ecb", "rate_date": "2026-08-14", "rate": 0.8643,
  "rate_type": "reference", "derived": false, "method": "published" }

Any past date — /central-bank/{bank}/2026-06-30. If the bank did not publish that day you get the most recent prior date, flagged.
Every bank at once — /api/v1/central-banks/rates returns all sources for one pair, so you can compare what each institution published.
Nothing is guessed — pairs a bank does not print are cross-computed from that bank's own table and returned with "derived": true and the method used. Banks are never mixed.

All 105 sources · Endpoint reference

Official SDKs

npm install @allratestoday/sdk · pip install allratestoday · composer require allratestoday/sdk

For AI agents

An MCP server — @allratestoday/mcp-server — lets Claude, Cursor and other MCP clients pull these rates directly, no glue code.

Free tier

300 requests, no credit card, no trial expiry. Paid plans start at €4.99/month for 5,000 requests a month.

Which one do you need? If a regulator, tax authority or auditor names the source, use the official rate — the two can differ by several percent on the same day. For everything a customer sees, use the mid-market rate. On weekends and holidays the official endpoints return the most recent published date, which is the figure compliance rules expect you to apply.