CurrencyApi PHP wrapper

CurrencyApi.net provides live currency rates via a REST API. A live currency feed for over 166 currencies, including physical (USD, GBP, EUR + more) and cryptos (Bitcoin, Litecoin, Ethereum + more). A JSON and XML currency api updated every 60 seconds.

Features:

• Live exchange rates (updated every 60 seconds).
• 166+ world currencies.
• Popular cryptocurrencies included; Bitcoin, Litecoin etc.
• Convert currencies on the fly with the convert endpoint.
• Historical currency rates back to year 2000.
• OHLC (candlestick) data for technical analysis.
• Easy to follow documentation

Signup for a free or paid account here.

Note: API v1 is deprecated and will be retired on 31st July 2026, at which point all v1 traffic will be redirected to v2. This SDK (v3.0.0+) targets API v2. If you are on an older version of this SDK, please upgrade.

This package is a:

PHP wrapper for CurrencyApi.net endpoints.

Developer Guide

For an easy to following developer guide, check out our PHP Developer Guide.

Alternatively keep reading below.

Prerequisites

• Minimum PHP 8.1+
• Working on PHP 8.5
• Free or Paid account with CurrencyApi.net
• Composer or clone this repo

Test Coverage

• 100% coverage

Installation

Using composer:

composer require houseofapis/currencyapi

then include the package with:

use HouseOfApis\CurrencyApi\CurrencyApi;

Without composer:

require_once('/path/to/currencyapi/src/CurrencyApi.php');
$currencyApi = new \CurrencyApi\CurrencyApi('API_KEY');

Usage

Live rates:

Returns the latest exchange rates for all supported currencies.

$result = $currencyApi->rates();

Example with all available methods:

$result = $currencyApi
    ->setBase('USD')
    ->setOutput('JSON')
    ->rates();

Available methods for rates endpoint

Methods	Description
setBase()	The base currency you wish you receive the currency conversions for. This will output all currency conversions for that currency. Default: USD.
setOutput()	Response output in either JSON or XML. Default: JSON.

List of available currencies:

Returns a list of all currencies supported by the API.

$result = $currencyApi->currencies();

Example with all available methods:

$result = $currencyApi
    ->setOutput('XML')
    ->currencies();

Available methods for currencies endpoint

Methods	Description
setOutput()	Response output in either JSON or XML. Default: JSON.

Convert:

Converts an amount from one currency to another using the latest rates.

$result = $currencyApi
    ->setAmount(100)
    ->setFrom('BTC')
    ->setTo('GBP')
    ->convert();

Available methods for convert endpoint

Methods	Description
setAmount()	The value of the currency you want to convert from. This should be a number and can contain a decimal place. Required.
setFrom()	The currency you want to convert. This will be a three letter ISO 4217 currency code from one of the currencies we have rates for. Required.
setTo()	The currency you want to convert the amount 'to'. Again this will be a three letter currency code from the ones we offer. Required.
setOutput()	Response output in either JSON or XML. Default: JSON.

Historical:

Returns exchange rates for all currencies on a specific date.

$result = $currencyApi->setDate('2019-01-01')->historical();

Example with all available methods:

$result = $currencyApi
    ->setDate('2019-01-01')
    ->setBase('GBP')
    ->setOutput('JSON')
    ->historical();

Available methods for historical endpoint

Methods	Description
setDate()	The historical date you wish to receive the currency conversions for. This should be formatted as YYYY-MM-DD. Required.
setBase()	The base currency you wish you receive the currency conversions for. This will output all currency conversions for that currency. Default: USD.
setOutput()	Response output in either JSON or XML. Default: JSON.

Timeframe:

Returns exchange rates for all currencies across a date range, with one entry per day.

$result = $currencyApi->setStartDate('2019-01-01')->setEndDate('2019-01-05')->timeframe();

Example with all available methods:

$result = $currencyApi
    ->setStartDate('2019-01-01')
    ->setEndDate('2019-01-05')
    ->setBase('GBP')
    ->setOutput('XML')
    ->timeframe();

Available methods for timeframe endpoint

Methods	Description
setStartDate()	The historical date you wish to receive the currency conversions from. This should be formatted as YYYY-MM-DD. Required.
setEndDate()	The historical date you wish to receive the currency conversions until. This should be formatted as YYYY-MM-DD. Required.
setBase()	The base currency you wish you receive the currency conversions for. This will output all currency conversions for that currency. Default: USD.
setOutput()	Response output in either JSON or XML. Default: JSON.

OHLC (Open, High, Low, Close):

Returns candlestick data for a currency pair on a given date, useful for charting and technical analysis.

$result = $currencyApi
    ->setQuote('EUR')
    ->setDate('2023-12-25')
    ->ohlc();

Example with all available methods:

$result = $currencyApi
    ->setQuote('EUR')
    ->setDate('2023-12-25')
    ->setBase('GBP')
    ->setInterval('1h')
    ->ohlc();

Available methods for OHLC endpoint

Methods	Description
setQuote()	The quote currency to retrieve OHLC data for. Three letter ISO 4217 currency code. Required.
setDate()	The date to retrieve OHLC data for. This should be formatted as YYYY-MM-DD. Required.
setBase()	The base currency for the rates. Default: USD.
setInterval()	The interval for the OHLC candles. One of: 5m, 15m, 30m, 1h, 4h, 12h, 1d. Default: 1d.

Example response:

{
    "valid": true,
    "base": "USD",
    "quote": "EUR",
    "date": "2023-12-25",
    "interval": "1d",
    "ohlc": [
        {
            "start": "2023-12-25T00:00:00Z",
            "open": 0.9123,
            "high": 0.9187,
            "low": 0.9098,
            "close": 0.9154
        }
    ]
}