ratesapi

Free exchange rates and historical rates

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No keyHTTPSNo CORSCurrency Exchange

Verified today: 100% uptime

API key

Not required

HTTPS

Supported

Browser calls

No, needs a proxy

Status

Live · 100/100

Overview & Architectural Role

ratesapi provides programmatic access to free exchange rates and historical rates. Delivered over secure HTTPS protocols, it exposes structured endpoints designed to integrate cleanly into modern frontend frameworks, backend microservices, and automated data pipelines without requiring local database provisioning.

Who it is built for

Engineers building web dashboards, mobile applications, CLI utilities, or background cron workers in need of reliable currency exchange data feeds.

Architectural Advantage

Consuming ratesapi removes the operational overhead of running custom scrapers, orchestrating headless browser fleets, or manually seeding and maintaining a local database. Instead of reverse-engineering volatile DOM layouts or dealing with anti-bot IP blocks, your application connects directly to a standardized JSON interface designed for backend ingestion with consistent schema schemas. Zero-authentication access allows rapid prototyping and zero-credential static deployments.

What our checks found

Health score: 100/100
Reliability: 100%
Average latency: 9199ms

Last checked 2026-10-24. Measured independently, not self-reported by the provider.

Core Use Cases & Architecture Ideas

Practical real-world patterns for integrating ratesapi into software systems.

Real-Time Portfolio Valuation Daemon

Recalculate user asset balances and currency conversions continuously against live market exchange rates.

Architecture: A background Redis worker polls ratesapi on interval, writes normalised price snapshots to a key-value store, and streams updates over WebSockets.

Volatility Alert & Webhook Dispatcher

Notify trading desks or personal subscribers when a target metric swings beyond predefined percentage thresholds.

Architecture: Serverless AWS Lambda or Cloudflare Worker fetches current tick data, compares against moving averages in PostgreSQL, and dispatches Discord/Telegram alerts.

E-Commerce Multi-Currency Checkout

Display localized product prices in international currencies during user cart evaluation.

Architecture: API route caches currency ratios in-memory for 1 hour to minimize latency while guaranteeing accurate transaction rates at payment gateway.

Code Implementation Examples

Production-ready starting templates with error handling for ratesapi.

// No authentication required.
// Modern native fetch with error handling
async function callApi() {
  try {
    const response = await fetch('https://ratesapi.io/api/v1/resource', {
      method: 'GET',
    headers: { Accept: 'application/json' },
    });

    if (!response.ok) {
      throw new Error(`HTTP ${response.status}: ${response.statusText}`);
    }

    const data = await response.json();
    console.log('Response payload:', data);
    return data;
  } catch (error) {
    console.error('API request failed:', error);
    throw error;
  }
}

// callApi();

This API does not send CORS headers, so a browser will block a direct call from your front end. Call it from your server, or put a small proxy in front of it.

Response Payload & Live Testing

Inspect the expected JSON structure returned by ratesapi.

Expected JSON Response Payload

Authentic sample payload structure to evaluate schema attributes before integration.

{
  "base": "USD",
  "date": "2026-10-24",
  "rates": {
    "EUR": 0.92,
    "GBP": 0.79,
    "JPY": 154.2,
    "CAD": 1.38
  },
  "success": true
}

Format: application/json

Integration Considerations & Best Practices

Technical factors to keep in mind when integrating ratesapi into production environments.

Implement In-Memory or Edge Caching

Avoid triggering rate limits on public feeds by caching response payloads in Redis, Vercel KV, or standard HTTP Cache-Control headers with a 5-to-15 minute TTL.

Zero-Credential Environment Protection

While no API key is required, public keyless pools often share global rate limits. If traffic surges return HTTP 429 Too Many Requests, wrap network calls in exponential backoff retry loops.

CORS Proxy Required for Browser Frontend Calls

This API does not send Access-Control-Allow-Origin response headers. Direct fetch() calls from browser JavaScript will fail due to Same-Origin Policy. Route your calls through a server backend or lightweight edge proxy.

Validate HTTP Status Before Parsing JSON

Always inspect response.ok before executing response.json(). Upstream services returning 4xx or 502 Bad Gateway often serve HTML error pages, which cause syntax errors when parsed as JSON.

Where this listing comes from

Free Currency Exchange Rates API with 150+ Currencies & No Rate Limits

No keyHTTPS

Verified today: 100% uptime

View Details

ratesapi — common questions

Answered from what our own scheduled checks found, not from the provider's marketing.

Is ratesapi free to use?

ratesapi is listed in our free catalogue and required no credential when we called it. It needs no authentication at all, so you can send a request without signing up. Free tiers can still carry rate limits or non-commercial terms, so check the provider's own terms before shipping.

Does ratesapi need an API key?

No. We called ratesapi on 2026-10-24 with no key, no token and no Authorization header, and it responded. That is what puts it in our no-key collection.

Can I call ratesapi from browser JavaScript?

Not directly. ratesapi did not return CORS headers when we checked, so the browser will block your page from reading the response even though the request itself succeeds. Call it from a server, or put a small proxy in front of it.

Is ratesapi still working?

Yes, as of 2026-10-24. Our automated check reached ratesapi and recorded a 100% reliability score with a median response time of 9199 ms. We re-check on a schedule, and this page updates with the result.

Is ratesapi available over HTTPS?

Yes. ratesapi serves over HTTPS, so you can call it from a secure page without triggering a mixed-content block.