Currency Converter API Reference

Overview

A currency exchange rate API with live FX rates for 170+ currencies, plus a past date's closing rate on paid plans. Currency Converter works by analyzing the amount and currency provided and converting the currency rate. It uses advanced algorithms to convert the currency rate based on the amount and currency and returns the converted currency rate. Each response names both currencies. Paid plans also get the pair's 24-hour change, high and low, its 1-day, 7-day, 30-day and 1-year percent change, and its 30-day high, low, average and volatility; history=true returns the last 30 daily closing rates and hourly=true the rate for each of the last 24 hours.

Live Test Currency Converter API →

Endpoint

One host, one path per API. The block below shows this call in four languages; every one of them is the same HTTP request. Making requests covers the timeouts, retries and parameter rules that apply to all of them. The SDKs wrap the same call in a typed client.

GEThttps://api.apiverve.com/v1/currencyconverter

1
2

curl "https://api.apiverve.com/v1/currencyconverter?value=1&from=USD&to=EUR&date=2025-06-02&history=true&hourly=true" \
  -H "x-api-key: your_api_key_here"

const res = await fetch('https://api.apiverve.com/v1/currencyconverter?value=1&from=USD&to=EUR&date=2025-06-02&history=true&hourly=true', {
  headers: { 'x-api-key': 'your_api_key_here' },
});

if (!res.ok) throw new Error(`${res.status} ${await res.text()}`);

const { data } = await res.json();
console.log(data);

import requests

res = requests.get(
    "https://api.apiverve.com/v1/currencyconverter?value=1&from=USD&to=EUR&date=2025-06-02&history=true&hourly=true",
    headers={"x-api-key": "your_api_key_here"},
    timeout=15,
)
res.raise_for_status()

print(res.json()["data"])

package main

import (
	"fmt"
	"io"
	"net/http"
)

func main() {
	req, _ := http.NewRequest("GET", "https://api.apiverve.com/v1/currencyconverter?value=1&from=USD&to=EUR&date=2025-06-02&history=true&hourly=true", nil)
	req.Header.Set("x-api-key", "your_api_key_here")

	res, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	defer res.Body.Close()

	out, _ := io.ReadAll(res.Body)
	fmt.Println(string(out))
}

Replace your_api_key_here with the key from your dashboard. When the inputs arrive as a list rather than one at a time, batch requests run up to 200 of them through this same API in a single call.

Authentication

Send your key in the x-api-key header. That is the only auth step — there is no token exchange and no per-endpoint scope to configure. Authentication covers creating, rotating and revoking keys.

401 is the only auth verdict

A 401 means the key is missing, invalid or expired. A 403 means the key is valid but not permitted here — blocked by a key restriction or an IP allow-list. Running out of credits is a 429.

Parameters

Sent in the query string. Premium parameters are accepted on every plan but only take effect on plans that include them.

Parameter	Type	Description
`value`Required	number	The amount to convert range 0–∞
`from`Required	string	The ISO 4217 currency code to convert from
`to`Required	string	The ISO 4217 currency code to convert to
`date`OptionalPremium	string	Optional past date (YYYY-MM-DD) to use that day's closing rates instead of live rates. History runs from 1999-01-04 for about 30 major currencies and covers every supported currency from March 2024. A day with no rates, such as a weekend or holiday, uses the last close before it.
`history`OptionalPremium	boolean	Include the pair's daily closing rate for the last 30 days
`hourly`OptionalPremium	boolean	Include the pair's rate for each of the last 24 hours (live rates only, not with date) date

Response

Every API returns the same three top-level keys, so one response handler covers your whole integration: status, error and data. Only data changes shape. Response format covers the envelope, the other output formats and how premium fields are withheld.

Sample response

{
  "status": "ok",
  "error": null,
  "data": {
    "from": "USD",
    "to": "EUR",
    "value": 100,
    "convertedValue": 89.5099,
    "rate": 0.895099,
    "change24h": 0.003587,
    "change24hPct": 0.4024,
    "changeDirection": "up",
    "high24h": 0.895323,
    "low24h": 0.8911,
    "date": "2026-10-27",
    "lastUpdated": "2026-10-27T17:41:09.810Z",
    "fromName": "US Dollar",
    "toName": "Euro",
    "change1d": 0.4467,
    "change7d": 0.5739,
    "change30d": 1.9699,
    "change1y": 4.1682,
    "high30d": 0.895099,
    "low30d": 0.878037,
    "average30d": 0.889911,
    "volatility30d": 0.2427,
    "history": [
      {
        "date": "2026-09-28",
        "rate": 0.878037
      },
      {
        "date": "2026-09-29",
        "rate": 0.880226
      },
      {
        "date": "2026-09-30",
        "rate": 0.882434
      },
      {
        "date": "2026-10-01",
        "rate": 0.883652
      },
      {
        "date": "2026-10-02",
        "rate": 0.888626
      },
      {
        "date": "2026-10-03",
        "rate": 0.888626
      },
      {
        "date": "2026-10-04",
        "rate": 0.888246
      },
      {
        "date": "2026-10-05",
        "rate": 0.894174
      },
      {
        "date": "2026-10-06",
        "rate": 0.891674
      },
      {
        "date": "2026-10-07",
        "rate": 0.890419
      },
      {
        "date": "2026-10-08",
        "rate": 0.892463
      },
      {
        "date": "2026-10-09",
        "rate": 0.889796
      },
      {
        "date": "2026-10-10",
        "rate": 0.892716
      },
      {
        "date": "2026-10-11",
        "rate": 0.892571
      },
      {
        "date": "2026-10-12",
        "rate": 0.892822
      },
      {
        "date": "2026-10-13",
        "rate": 0.894845
      },
      {
        "date": "2026-10-14",
        "rate": 0.891987
      },
      {
        "date": "2026-10-15",
        "rate": 0.890861
      },
      {
        "date": "2026-10-16",
        "rate": 0.88987
      },
      {
        "date": "2026-10-17",
        "rate": 0.889757
      },
      {
        "date": "2026-10-18",
        "rate": 0.889761
      },
      {
        "date": "2026-10-19",
        "rate": 0.890515
      },
      {
        "date": "2026-10-20",
        "rate": 0.889991
      },
      {
        "date": "2026-10-21",
        "rate": 0.890629
      },
      {
        "date": "2026-10-22",
        "rate": 0.889437
      },
      {
        "date": "2026-10-23",
        "rate": 0.891773
      },
      {
        "date": "2026-10-24",
        "rate": 0.892532
      },
      {
        "date": "2026-10-25",
        "rate": 0.892668
      },
      {
        "date": "2026-10-26",
        "rate": 0.891118
      },
      {
        "date": "2026-10-27",
        "rate": 0.895099
      }
    ],
    "hourly": [
      {
        "hour": 18,
        "rate": 0.891512,
        "timestamp": "2026-10-26T18:41:09.810Z"
      },
      {
        "hour": 19,
        "rate": 0.891173,
        "timestamp": "2026-10-26T19:41:09.810Z"
      },
      {
        "hour": 20,
        "rate": 0.8911,
        "timestamp": "2026-10-26T20:41:09.810Z"
      },
      {
        "hour": 21,
        "rate": 0.891849,
        "timestamp": "2026-10-26T21:41:09.810Z"
      },
      {
        "hour": 22,
        "rate": 0.89212,
        "timestamp": "2026-10-26T22:41:09.810Z"
      },
      {
        "hour": 23,
        "rate": 0.891692,
        "timestamp": "2026-10-26T23:41:09.810Z"
      },
      {
        "hour": 0,
        "rate": 0.891922,
        "timestamp": "2026-10-27T00:41:09.810Z"
      },
      {
        "hour": 1,
        "rate": 0.892681,
        "timestamp": "2026-10-27T01:41:09.810Z"
      },
      {
        "hour": 2,
        "rate": 0.892646,
        "timestamp": "2026-10-27T02:41:09.810Z"
      },
      {
        "hour": 3,
        "rate": 0.892287,
        "timestamp": "2026-10-27T03:41:09.810Z"
      },
      {
        "hour": 4,
        "rate": 0.892805,
        "timestamp": "2026-10-27T04:41:09.810Z"
      },
      {
        "hour": 5,
        "rate": 0.893422,
        "timestamp": "2026-10-27T05:41:09.810Z"
      },
      {
        "hour": 6,
        "rate": 0.893135,
        "timestamp": "2026-10-27T06:41:09.810Z"
      },
      {
        "hour": 7,
        "rate": 0.892984,
        "timestamp": "2026-10-27T07:41:09.810Z"
      },
      {
        "hour": 8,
        "rate": 0.8937,
        "timestamp": "2026-10-27T08:41:09.810Z"
      },
      {
        "hour": 9,
        "rate": 0.894058,
        "timestamp": "2026-10-27T09:41:09.810Z"
      },
      {
        "hour": 10,
        "rate": 0.89364,
        "timestamp": "2026-10-27T10:41:09.810Z"
      },
      {
        "hour": 11,
        "rate": 0.893781,
        "timestamp": "2026-10-27T11:41:09.810Z"
      },
      {
        "hour": 12,
        "rate": 0.894553,
        "timestamp": "2026-10-27T12:41:09.810Z"
      },
      {
        "hour": 13,
        "rate": 0.894604,
        "timestamp": "2026-10-27T13:41:09.810Z"
      },
      {
        "hour": 14,
        "rate": 0.894209,
        "timestamp": "2026-10-27T14:41:09.810Z"
      },
      {
        "hour": 15,
        "rate": 0.894651,
        "timestamp": "2026-10-27T15:41:09.810Z"
      },
      {
        "hour": 16,
        "rate": 0.895323,
        "timestamp": "2026-10-27T16:41:09.810Z"
      },
      {
        "hour": 17,
        "rate": 0.895099,
        "timestamp": "2026-10-27T17:41:09.810Z"
      }
    ]
  }
}

Response fields

Paths are relative to data. Premium fields are absent rather than zeroed on plans that do not include them, so check for presence instead of comparing to 0.

Field	Type	Example	Description
`from`	string	`"USD"`	Source currency code (e.g., USD, EUR)
`to`	string	`"EUR"`	Target currency code (e.g., USD, EUR)
`value`	number	`100`	Original amount to convert
`convertedValue`	number	`89.5099`	Converted amount in target currency
`rate`	number	`0.895099`	Current exchange rate for the currency pair
`change24h`Premium	number	`0.003587`	Rate change vs 24 hours ago
`change24hPct`Premium	number	`0.4024`	Percentage rate change vs 24 hours ago
`changeDirection`	string	`"up"`	Direction of 24h change: up, down, or unchanged
`high24h`Premium	number	`0.895323`	Highest rate in the past 24 hours
`low24h`Premium	number	`0.8911`	Lowest rate in the past 24 hours
`date`	string	`"2026-10-27"`	UTC date (YYYY-MM-DD) of the rates used: the live rates' date, or the day served for a date request
`lastUpdated`	string	`"2026-10-27T17:41:09.810Z"`	ISO 8601 timestamp of when the exchange rates were last refreshed
`fromName`	string	`"US Dollar"`	English name of the source currency; null when none is known
`toName`	string	`"Euro"`	English name of the target currency; null when none is known
`change1d`Premium	number	`0.4467`	Percent change in the pair's rate since the previous day's close; null until a close from then is stored
`change7d`Premium	number	`0.5739`	Percent change in the pair's rate over the last 7 days; null until a close from then is stored
`change30d`Premium	number	`1.9699`	Percent change in the pair's rate over the last 30 days; null until a close from then is stored
`change1y`Premium	number	`4.1682`	Percent change in the pair's rate over the last year; null when no close from then is stored
`high30d`Premium	number	`0.895099`	Highest daily closing rate for the pair over the last 30 days; null until two days are stored
`low30d`Premium	number	`0.878037`	Lowest daily closing rate for the pair over the last 30 days; null until two days are stored
`average30d`Premium	number	`0.889911`	Mean daily closing rate for the pair over the last 30 days; null until two days are stored
`volatility30d`Premium	number	`0.2427`	Standard deviation of the daily percent changes over the last 30 days (not annualized); null until two days are stored
`history`Premium	array[30]		The pair's daily closing rate for the last 30 days, oldest first (when history=true)
`date`Premium	string	`"2026-09-28"`	UTC date of the close (YYYY-MM-DD)
`rate`Premium	number	`0.878037`	Closing rate from the source to the target currency
`hourly`Premium	array[24]		The pair's rate for each of the last 24 hours, oldest first (when hourly=true)
`hour`Premium	number	`18`	UTC hour of day (0-23) the rate was recorded in
`rate`Premium	number	`0.891512`	Rate from the source to the target currency at that hour
`timestamp`Premium	string	`"2026-10-26T18:41:09.810Z"`	ISO 8601 time the rate was recorded

Errors

Read the HTTP status first, then error for the specific reason. The body names the parameter that has to change. Error handling covers the full status list and which of them are worth retrying.

Status	Meaning	What to do
`400`	Input was rejected	Read `error`; it names the parameter.
`401`	Key missing or invalid	Check the header name and the key value.
`403`	Key valid, but not permitted	A key restriction or IP allow-list; see key scoping.
`429`	Rate limited, or out of credits	Read `error` to tell them apart; see rate limits.

Use cases

Multi-Currency Storefront Checkout: E-commerce platforms convert catalog prices to shoppers' local currencies and display current exchange rates at checkout before processing payment.
Cross-Border Expense Reporting: When employees submit foreign travel receipts, accounting software converts reimbursable expenses into company base currency using the exact exchange rate.
International Invoice Generation: Generate export invoices in foreign buyer currencies by calculating converted subtotals and showing whether the exchange rate moved up or down.
Travel Card Expense Tracking: To prevent surprise foreign transaction charges, mobile banking apps calculate local currency balances on the fly using real-time conversion rates.

Other ways to use Currency Converter

Set up Currency Converter on APIVerve, or reach the same source a different way. Your APIVerve account and credits work on all of them — one key, one balance.

Give it to an AI agentConnect over MCP and your agent calls it as a native tool — Claude, Cursor, ChatGPT.VerveKit →Reference →

Google Sheets or ExcelA =VERVE() formula fills a column — no script, no export, recalculates in place.VerveSheets →Reference →

Ground an agent on itA cited, machine-checkable fact your model can't produce on its own.VerveContext →Reference →

Pages that use this API:

CORSReference

Currency Converter