---
title: "Currency API for JavaScript: 5 Best Options in 2026 (npm + Code)"
description: "The 5 best currency exchange rate APIs for JavaScript and Node.js in 2026, ranked — npm SDKs, working fetch examples, free-tier limits and pricing compared side by side."
canonical: https://allratestoday.com/best/best-currency-api-for-javascript/
source: AllRatesToday (https://allratestoday.com/) — Markdown mirror of the page above; index of all pages at https://allratestoday.com/llms.txt
generated: 2026-10-09T07:34:34.538Z
---

# Currency API for JavaScript: 5 Best Options in 2026 (npm + Code)

The 5 best currency exchange rate APIs for JavaScript and Node.js in 2026, ranked — npm SDKs, working fetch examples, free-tier limits and pricing compared side by side.

Building a JavaScript app that needs exchange rates? Whether it's a Node.js backend, a React dashboard, or a Next.js SaaS, you want an API with a proper npm package — not raw `fetch()` calls everywhere. Here's how the top providers compare for JS/TS developers.

## Quick Comparison

| Provider | npm Package | TypeScript | Free Tier | Update Freq | Price |
| --- | --- | --- | --- | --- | --- |
| **AllRatesToday** | `@allratestoday/sdk` | Native TS | 300 req/mo | 60 seconds | Free / €4.99 |
| **ExchangeRate-API** | No official SDK | No | 1,500 req/mo | Daily | Free / $9.99 |
| **Frankfurter** | No official SDK | No | Unlimited | Daily (ECB) | Free |
| **Open Exchange Rates** | `oxr` (community) | No | 1,000 req/mo | Hourly | Free / $12 |
| **Fixer** | No official SDK | No | 100 req/mo | Hourly | Free / €9.99 |

## 1. AllRatesToday

AllRatesToday ships an official TypeScript SDK on npm with full type definitions, auto-completion, and a dedicated React hook package. Rates are mid-market from institutional interbank market data, updated every 60 seconds. Zero dependencies beyond the SDK itself.

```
npm install @allratestoday/sdk
```

```
import { ExchangeRateAPI } from '@allratestoday/sdk';

const client = new ExchangeRateAPI('art_live_your_key');

// Current rate
const { rate } = await client.getRate('USD', 'EUR');
console.log(`1 USD = ${rate} EUR`);

// Historical rates (last 30 days)
const history = await client.getHistoricalRates('USD', 'EUR', '30d');
history.data.forEach(p => console.log(`${p.date}: ${p.rate}`));
```

**React developers** also get a dedicated package:

```
npm install @allratestoday/react
```

```
import { useExchangeRate } from '@allratestoday/react';

function PriceDisplay() {
  const { rate, loading } = useExchangeRate('USD', 'EUR');
  if (loading) return Loading...;
  return 1 USD = {rate} EUR;
}
```

#### Pros

- Official TypeScript SDK with full types
- Dedicated React hooks package
- Real-time rates (60s updates)
- Mid-market rates, no markup
- MCP server for AI coding tools

#### Cons

- Free tier limited to 300 req/mo
- Newer provider

## 2. ExchangeRate-API

Generous free tier at 1,500 requests/month. No official npm package — you use `fetch()` directly. Rates update daily on the free plan. Straightforward JSON responses.

```
const resp = await fetch('https://v6.exchangerate-api.com/v6/YOUR_KEY/latest/USD');
const data = await resp.json();
console.log(`USD to EUR: ${data.conversion_rates.EUR}`);
```

#### Pros

- 1,500 free requests/month
- Simple REST API

#### Cons

- No npm SDK or TypeScript types
- Daily updates only on free tier

## 3. Frankfurter

Open-source, free, no API key. Only 33 currencies (ECB reference rates). Great for prototypes and EU-focused apps that don't need exotic pairs.

```
const resp = await fetch('https://api.frankfurter.dev/v1/latest?base=USD&symbols=EUR,GBP');
const data = await resp.json();
console.log(data.rates);
```

#### Pros

- Free, no key needed
- Open-source

#### Cons

- Only 33 currencies
- No SDK, no TypeScript types
- No SLA

## 4. Open Exchange Rates

Established provider with hourly updates on paid plans. A community `oxr` npm package exists but is not officially maintained. USD-only base on free plan.

#### Pros

- Established since 2012
- 170+ currencies

#### Cons

- No official npm SDK
- USD-only on free plan
- $12/mo minimum for flexible base

## 5. Fixer

Part of Apilayer. Only 100 free requests/month. HTTPS requires a paid plan. No npm SDK.

#### Pros

- 170 currencies
- Apilayer ecosystem

#### Cons

- 100 req/mo free tier
- HTTPS is paid only
- No npm SDK

## Our Verdict

**AllRatesToday** wins for JavaScript/TypeScript developers. It's the only provider with an official npm SDK, native TypeScript types, a React hooks package, and real-time data. If you just need a quick prototype with major currencies, Frankfurter is free and keyless.

## Start building in JavaScript

`npm install @allratestoday/sdk` — free tier, no credit card.

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

## Related

  [Best currency API 2026Full buyer's guide](https://allratestoday.com/best/best-currency-api-2026/) [Best currency API for Pythonpip install guide](https://allratestoday.com/best/best-currency-api-for-python/) [Best free forex APIsFree-tier deep dive](https://allratestoday.com/best/best-free-forex-api/) [Best MCP server for exchange ratesAI tool integrations](https://allratestoday.com/best/best-mcp-server-for-exchange-rates/)