Faster APIs.
Lower Bills. Zero Infra.
CORSPROXY caches API responses at 330+ edge locations worldwide. Slow third-party APIs become instant. Rate limits stop being a problem. API costs drop.
Cache in Three Steps
Prefix the URL
Replace your API URL with the CORSPROXY prefix. No code changes beyond the URL string.
First Request Fetches
CORSPROXY fetches from the origin API and caches the response at your nearest edge location.
All Subsequent Requests are Instant
Cache hits return in under 10ms from the nearest edge — without touching the origin API.
Cache Control
CORSPROXY respects standard Cache-Control headers. Override them per request using the resHeaders parameter.
resHeaders=cache-control:max-age=300 Cache response for 5 minutes (300 seconds). Adjust the number for your use case.
resHeaders=cache-control:no-cache Bypass the cache entirely. Always fetches fresh data from the origin.
resHeaders=cache-control:max-age=3600 Cache for 1 hour. Good for rarely-changing data like exchange rates or pricing.
(no param) Default caching behavior based on the origin API's Cache-Control headers. Works automatically.
Rate Limit Protection
Share a single cached response across thousands of users without hitting API rate limits.
Faster Dashboards
Turn a 1-second API call into a 10ms cache hit. Your dashboards load before users notice.
Cut API Costs
Pay per unique data point, not per user. Crypto prices, weather, exchange rates — cache them all.
Global Performance
Responses cached at the edge closest to each user. Lower latency worldwide — without a CDN setup.
Offline-Like Resilience
If the origin API goes down, users still get the last cached response — keeping your app functional.
Cryptocurrency & Finance
Cache volatile data like token prices or FX rates with short TTLs. Get fresh-enough data without hammering the API.
Ready to Copy
// Default caching — no extra params needed.
// CORSPROXY caches responses automatically at the edge.
const res = await fetch(
'https://corsproxy.io/?url=' +
encodeURIComponent('https://api.coinmarketcap.com/data-api/v3/cryptocurrency/listing')
);
const data = await res.json();// Custom TTL: cache for 5 minutes (300 seconds)
const params = new URLSearchParams({
key: 'YOUR_API_KEY',
url: 'https://api.example.com/prices',
resHeaders: 'cache-control:max-age=300',
});
const res = await fetch(`https://corsproxy.io/?${params}`);
const data = await res.json();// Bypass cache for real-time data
const params = new URLSearchParams({
key: 'YOUR_API_KEY',
url: 'https://api.example.com/live-prices',
resHeaders: 'cache-control:no-cache',
});
const res = await fetch(`https://corsproxy.io/?${params}`);
const data = await res.json();No infra needed
Faster APIs. Lower costs. Today.
No Redis. No Varnish. No CDN config. Just prefix your API URL and responses are cached globally.