---
title: "Currency API for Startups — Affordable, Real-Time"
description: "A currency API priced for startups: free tier with real-time rates, €4.99 entry plan, monthly billing, no annual contracts. Built for SaaS, fintech, and marketplaces."
canonical: https://allratestoday.com/use-cases/currency-api-for-startups/
source: AllRatesToday (https://allratestoday.com/) — Markdown mirror of the page above; index of all pages at https://allratestoday.com/llms.txt
generated: 2026-10-19T11:43:57.595Z
---

# Currency API for Startups — Affordable, Real-Time

A currency API priced for startups: free tier with real-time rates, €4.99 entry plan, monthly billing, no annual contracts. Built for SaaS, fintech, and marketplaces.

By [Madhushan](https://allratestoday.com/authors/madhushan/), Founder & Lead Developer

Most currency-data vendors are priced for banks. If you're a 2-person startup, you don't want a $1,000/month minimum or an annual contract just to display prices in three currencies. AllRatesToday was built for the company you're running today, with a path to the company you'll grow into.

## Why startups pick AllRatesToday

- **Free to start.** The free tier covers prototyping and beta.
- **€4.99 entry plan.** Real-time rates, historical data, and commercial use rights.
- **Monthly billing.** No annual lock-in — scale up or cancel from your dashboard.
- **Same data class as enterprise vendors.** Mid-market rates from institutional foreign exchange market data.
- **Self-serve.** No sales calls, no quote forms, no NDAs.

## Common startup use cases

### Multi-currency pricing display

Show prices in the visitor's local currency without hand-maintaining a rate table. One `/v1/rates` call per visit (cached) covers it.

### Cross-border invoicing

Quote in your customer's currency, settle in yours. Fetch `/rate`, multiply the amount, and store both the source and quoted values on the invoice.

### Marketplaces

Buyers and sellers in different currencies — show items in the buyer's currency while keeping seller payouts in theirs.

### Travel and bookings

Display nightly rates in the user's local currency, refresh on a 5-minute cache.

## Sample integration cost

For a typical early-stage SaaS getting ~10,000 page views per month with 60-second rate caching:

```
Page views/mo:        10,000
Cache window:         60 seconds
Effective API calls:  ~720/day  =>  ~22,000/mo without dedup
With per-currency dedup, typical real call count: ~3,000–5,000/mo

Plan needed:          Small (€4.99)
```

  Most startups are surprised how few real calls they actually need once caching is in place. We walk through the math in our [caching guide](https://allratestoday.com/blog/how-to-cache-exchange-rates-avoid-rate-limits).

## Code: a tiny multi-currency helper

```
// utils/price.ts — using @allratestoday/sdk
import AllRatesToday from '@allratestoday/sdk';

const client = new AllRatesToday({ apiKey: process.env.ALLRATES_API_KEY });
const TTL_MS = 60_000;
let cache: { at: number; rates: Record<string, number> } | null = null;

export async function ratesUSD(symbols: string[]) {
  if (cache && Date.now() - cache.at < TTL_MS) return cache.rates;
  const { rates } = await client.latest({ base: 'USD', symbols });
  cache = { at: Date.now(), rates };
  return rates;
}

export async function priceIn(currency: string, usd: number) {
  const rates = await ratesUSD([currency]);
  return usd * (rates[currency] ?? 1);
}
```

## FAQ

### Can I switch plans later?

Yes — upgrade or downgrade from your dashboard. No phone call required.

### What about Stripe's built-in conversion?

Stripe converts at payout time. You still need a separate rate source to *display* prices in local currency before checkout.

### How do you handle exotic currencies?

160+ supported, including most ISO 4217 currencies you'll encounter in B2C.

## Built for startup budgets

Start free, upgrade when you need to.

 [Get free API key](https://allratestoday.com/register) [See pricing](https://allratestoday.com/pricing)

## Related

  [Forex API for developersEndpoint reference](https://allratestoday.com/use-cases/forex-api-for-developers/) [Currency API for ecommerceMulti-currency checkout patterns](https://allratestoday.com/use-cases/currency-api-for-ecommerce/) [XE API alternativeIf XE quoted you too high](https://allratestoday.com/compare/xe-api-alternative/)