Fiat From Base

Returns live exchange rates from a specified fiat base currency to all other supported fiat currencies. Covers 150+ ISO 4217 currencies.

Use this to:

• Display multi-currency prices in an e-commerce checkout
• Power a fiat currency converter widget
• Populate a rate table for financial dashboards
• Perform batch currency conversions with a single API call

Base URL

https://fast-price-exchange-rates.p.rapidapi.com

---

Get fiat rates from base

GET/api/v1/convert-rates/fiat/from

Returns an object with the base currency and a map of all target fiat currencies to their exchange rates.

Authentication

Header	Value
X-RapidAPI-Key	Your RapidAPI secret key
X-RapidAPI-Host	fast-price-exchange-rates.p.rapidapi.com

Query parameters

Parameter	Type	Required	Description
currency	string	Yes	ISO 4217 base currency code (e.g. USD, EUR, GBP). The response will express all rates relative to 1 unit of this currency.
detailed	boolean	No	When false (default): keys in the to object are plain ISO codes ("EUR", "JPY"). When true: keys include the full name and asset type ("EUR:EURO:FIAT"), useful for display labels without an extra lookup.

---

Example requests

cURL — simple

curl "https://fast-price-exchange-rates.p.rapidapi.com/api/v1/convert-rates/fiat/from?currency=USD&detailed=false" \
  -H "X-RapidAPI-Key: YOUR_RAPIDAPI_KEY" \
  -H "X-RapidAPI-Host: fast-price-exchange-rates.p.rapidapi.com"

cURL — detailed

curl "https://fast-price-exchange-rates.p.rapidapi.com/api/v1/convert-rates/fiat/from?currency=USD&detailed=true" \
  -H "X-RapidAPI-Key: YOUR_RAPIDAPI_KEY" \
  -H "X-RapidAPI-Host: fast-price-exchange-rates.p.rapidapi.com"

JavaScript — simple

const response = await fetch(
  'https://fast-price-exchange-rates.p.rapidapi.com/api/v1/convert-rates/fiat/from?currency=USD&detailed=false',
  {
    headers: {
      'X-RapidAPI-Key': process.env.RAPIDAPI_KEY,
      'X-RapidAPI-Host': 'fast-price-exchange-rates.p.rapidapi.com',
    },
  }
)

const data = await response.json()

// Convert 100 USD to EUR
const amount = 100
const eurRate = data.to['EUR']
console.log(`${amount} USD = ${(amount * eurRate).toFixed(2)} EUR`)

JavaScript — detailed keys

const response = await fetch(
  'https://fast-price-exchange-rates.p.rapidapi.com/api/v1/convert-rates/fiat/from?currency=USD&detailed=true',
  {
    headers: {
      'X-RapidAPI-Key': process.env.RAPIDAPI_KEY,
      'X-RapidAPI-Host': 'fast-price-exchange-rates.p.rapidapi.com',
    },
  }
)

const data = await response.json()

// Parse detailed key format: "CODE:FULL NAME:FIAT"
const currencies = Object.entries(data.to).map(([key, rate]) => {
  const [code, name] = key.split(':')
  return { code, name, rate }
})

// Display top 5 by rate (highest first)
currencies
  .sort((a, b) => b.rate - a.rate)
  .slice(0, 5)
  .forEach(({ code, name, rate }) => {
    console.log(`${code} (${name}): ${rate.toFixed(4)}`)
  })

Python — simple

import os
import requests

response = requests.get(
    "https://fast-price-exchange-rates.p.rapidapi.com/api/v1/convert-rates/fiat/from",
    params={"currency": "USD", "detailed": "false"},
    headers={
        "X-RapidAPI-Key": os.environ["RAPIDAPI_KEY"],
        "X-RapidAPI-Host": "fast-price-exchange-rates.p.rapidapi.com",
    },
)

response.raise_for_status()
data = response.json()

# Convert 250 USD to several currencies
amount = 250
for code in ["EUR", "GBP", "JPY", "CAD", "CHF"]:
    rate = data["to"][code]
    print(f"{amount} USD → {amount * rate:.2f} {code}")

Python — detailed keys

import os
import requests

response = requests.get(
    "https://fast-price-exchange-rates.p.rapidapi.com/api/v1/convert-rates/fiat/from",
    params={"currency": "USD", "detailed": "true"},
    headers={
        "X-RapidAPI-Key": os.environ["RAPIDAPI_KEY"],
        "X-RapidAPI-Host": "fast-price-exchange-rates.p.rapidapi.com",
    },
)

response.raise_for_status()
data = response.json()

# Parse "CODE:FULL NAME:FIAT" keys
rows = []
for key, rate in data["to"].items():
    code, name, _ = key.split(":")
    rows.append((code, name, rate))

# Print sorted alphabetically by code
rows.sort()
print(f"{'Code':<6} {'Name':<45} Rate")
print("-" * 70)
for code, name, rate in rows[:10]:
    print(f"{code:<6} {name:<45} {rate:.6f}")

---

Response — detailed=false

{
  "from": "USD",
  "to": {
    "AED": 3.6728013731458162,
    "AFN": 64.71054424641723,
    "ALL": 81.89134982055863,
    "AMD": 376.0597305680834,
    "ARS": 1381.9607607979424,
    "AUD": 1.4198113530093084,
    "BRL": 5.0861422107225245,
    "CAD": 1.381715477711771,
    "CHF": 0.7921887364072324,
    "CNY": 6.83490419468795,
    "EUR": 0.8436933346454653,
    "GBP": 0.7491693643827342,
    "JPY": 159.23017759072337,
    "USD": 1,
    "..."  : "... 150+ currencies total"
  }
}

Response — detailed=true

{
  "from": "USD",
  "to": {
    "AED:UNITED ARAB EMIRATES DIRHAM:FIAT": 3.666453291193232,
    "AFN:AFGHAN AFGHANI:FIAT": 64.70801172821858,
    "ALL:ALBANIAN LEK:FIAT": 81.87010559489238,
    "EUR:EURO:FIAT": 0.8451476203977013,
    "GBP:BRITISH POUND:FIAT": 0.7494781686705793,
    "JPY:JAPANESE YEN:FIAT": 159.23285616314695,
    "USD:UNITED STATES DOLLAR:FIAT": 1,
    "..."  : "... 150+ currencies total"
  }
}

Response fields

Field	Type	Description
from	string	The ISO 4217 code of the base currency (mirrors the currency query parameter).
to	object	Map of target currencies to their exchange rates. One unit of from equals rate units of the target currency. Key format depends on the detailed parameter: • false: plain ISO code — "EUR" • true: "CODE:FULL NAME:FIAT" — "EUR:EURO:FIAT"

Key format (detailed=true)

CODE:FULL NAME:FIAT
 │       │      └─ asset type, always "FIAT" for this endpoint
 │       └─ full English name of the currency
 └─ ISO 4217 three-letter code

Example: "EUR:EURO:FIAT": 0.845

Conversion formula

targetAmount = sourceAmount × rate

To convert in the reverse direction (e.g. EUR → USD when base is USD):

sourceAmount = targetAmount / rate

---

Error responses

Status	Code	Description
400	bad_request	currency parameter is missing or not a valid ISO 4217 code
401	unauthorized	X-RapidAPI-Key is missing or invalid
403	forbidden	Your RapidAPI plan does not include access to this endpoint
429	too_many_requests	RapidAPI rate limit exceeded
500	internal_error	Server error — safe to retry after a short delay

---

Related endpoints

Endpoint	Description
Fast Price API Overview	All endpoints in the Fast Price API