Exchange Rates API

Daily official central bank reference rates for around 30 currencies, with history back to 1999. Any currency can be the base: cross rates are calculated for you.

Quick start

curl "https://exchange.quiply.net/v1/latest?base=USD&symbols=EUR,GBP,JPY" \
  -H "X-API-Key: YOUR_KEY"

Authentication

Every request must include your key in the X-API-Key header. You get your key instantly on the pricing section. Keep it secret — don't put it in public front-end code.

Base URL: https://exchange.quiply.net

GET/v1/latest

The most recent published rates.

Parameter	Type	Description
`base`	string	Base currency (default `EUR`)
`symbols`	CSV	Target currencies, e.g. `EUR,GBP,JPY` (default: all)

{
  "base": "USD",
  "date": "2026-10-29",
  "rates": { "EUR": 0.8984726, "GBP": 0.75092543, "JPY": 158.05929919 }
}

GET/v1/historical

Rates for one day. Weekends and holidays return the previous published day (see the date field).

Parameter	Type	Description
`date` required	string	`YYYY-MM-DD`
`base`	string	Base currency (default `EUR`)
`symbols`	CSV	Target currencies, e.g. `EUR,GBP,JPY` (default: all)

GET/v1/timeseries

Daily rates over a range (maximum 366 days). Response: {"base", "start", "end", "days", "rates": {"YYYY-MM-DD": {...}}}

Parameter	Type	Description
`start` required	string	`YYYY-MM-DD`
`end` required	string	`YYYY-MM-DD`
`base`	string	Base currency (default `EUR`)
`symbols`	CSV	Target currencies, e.g. `EUR,GBP,JPY` (default: all)

GET/v1/convert

Convert an amount between two currencies.

Parameter	Type	Description
`from` required	string	Source currency, e.g. `USD`
`to` required	string	Target currency, e.g. `JPY`
`amount`	number	Amount to convert (default 1)
`date`	string	Optional `YYYY-MM-DD` (default: latest)

curl "https://exchange.quiply.net/v1/convert?from=USD&to=JPY&amount=100" -H "X-API-Key: YOUR_KEY"

{ "from": "USD", "to": "JPY", "amount": 100.0, "date": "2026-10-29", "rate": 158.05929919, "result": 15805.929919 }

GET/v1/currencies

Supported currency codes with the first and last date each is available.

GET/v1/health

Service status and data freshness. No key needed.

Rates are official central bank reference rates, published once per working day (around 16:00 CET) and refreshed here automatically. They are for information and are not intended for trading execution.

Errors

Status	Meaning
401	Missing or invalid `X-API-Key`
403	Subscription inactive (cancelled or payment failed)
404	No rates available for the requested date
422	Bad parameter (e.g. wrong date format, unsupported currency, range over 366 days)
429	Quota reached for your plan

Pricing

Free trial: 5 requests/day. All APIs plan: $9.95/month gives you every Quiply API, 250,000 requests a month.

Get your API key