Currency Exchange Rate API
Fast, reliable exchange rates for 100+ currencies. Cached responses, historical data back to 1999, and a clean v1 REST API for server-side integrations.
Everything you need for currency data
Built for developers who need reliable, fast exchange rate data without the complexity.
Simple REST API
A clean v1 REST interface with standard JSON responses. Minimal integration effort — fetch the rates you need with straightforward HTTP requests.
100+ Currencies
Coverage from multiple configured rate sources, including central banks and financial data providers, for major fiat and emerging-market currencies.
Cached Responses
Exchange rates are cached to keep common requests fast and avoid unnecessary upstream calls.
Historical Data
Access exchange rate history back to 1999. Perfect for financial analysis, backtesting, and reporting applications.
Account-Level Rate Limiting
Fair usage with transparent per-account limits. Monitor your consumption in the dashboard and upgrade when you need more.
Developer Friendly
Simple REST API with clear JSON responses and comprehensive documentation. Get up and running in minutes, not hours.
Simple by design
One API key. Clear endpoints. Straightforward integration.
curl -H "X-API-Key: YOUR_API_KEY" \
https://api.rateflowapi.com/v1/rates/latest?base=EUR$response = Http::withHeaders([
'X-API-Key' => 'YOUR_API_KEY',
])->get('https://api.rateflowapi.com/v1/rates/latest?base=EUR');
$rates = $response->json('data.rates');const res = await fetch(
'https://api.rateflowapi.com/v1/rates/latest?base=EUR',
{ headers: { 'X-API-Key': 'YOUR_API_KEY' } }
);
const { data } = await res.json();{
"success": true,
"data": {
"base": "EUR",
"updated_at": "2024-01-15T00:00:01Z",
"rates": {
"USD": 1.0873,
"GBP": 0.8561,
"JPY": 159.42,
"CHF": 0.9387,
...
}
}
}Simple, transparent pricing
Start for free. Scale as you grow. No hidden fees.
Free
Perfect for prototyping
- 1 API key
- 100+ currencies
- Current rates only
- No historical data
Pro
For production apps
- Unlimited API keys
- 100+ currencies
- Historical data (1 year)
- Priority support
Business
For teams & high volume
- Unlimited API keys
- 100+ currencies
- Full historical data (since 1999)
- SLA + dedicated support
Common use cases
Ways teams can use RateFlow without depending on live upstream providers for every request.
Commerce
Show localized prices and currency conversions from a server-side integration with a single API key.
SaaS dashboards
Track usage, quotas, and API keys from a dashboard built for production applications.
Reporting
Use latest and historical exchange rates for financial reports, exports, and internal analysis.
Ready to get started?
Start with a free plan and build against a clean v1 API. No credit card required.
Create Your Free Account