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API · /caniuse-api

Can I Use API

healthy 4,682 Subscribers

Browser-feature compatibility data as an API — the "Can I Use" support tables for over 550 web platform features across 19 browsers (Chrome, Edge, Firefox, Safari, iOS Safari, Samsung Internet, Opera, IE and more). Look up any feature (flexbox, css-grid, webp, fetch, websockets, …) for its full support matrix: per-browser current support, the first version that shipped full support, partial/prefixed/disabled flags and notes, the spec status, categories, keywords, global usage share and reference links. Ask a single feature×browser question, list or filter features by category, search features by keyword, and get the browser/agent list with version histories and the category/status legend. Backed by the public caniuse-db dataset (refreshed every 12 hours); query results are computed live. 7 endpoints. Built for build tooling, polyfill decisions, compatibility dashboards, linters and documentation. No upstream key.

#caniuse #browser-compatibility #web-platform #developer-tools #css #frontend
api.oanor.com/caniuse-api
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Machine-readable spec so AI agents can integrate this API.

/api/caniuse-api/openapi.json
/api/caniuse-api/llms.txt

Discovery: GET /api/index.json lists every API.

Can I Use API — live data on the oanor API marketplace

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
111 ms
Server probes · 24h
Subscribers
4,682
active
Total calls
140
last 7 days
status Full status page → · 28 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 2,150 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 2,150 calls/month
  • 2 req/sec
  • All 7 endpoints, 550+ features
  • No credit card
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Starter

€8.50 /month

  • 47,000 calls / month
  • 8 requests / second
  • Hard cap (429 above quota, no overage)
  • 47k calls/month
  • 8 req/sec
  • Full support matrices
  • Email support
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Pro

€27.00 /month

  • 238,000 calls / month
  • 20 requests / second
  • Hard cap (429 above quota, no overage)
  • 238k calls/month
  • 20 req/sec
  • Build-tooling / linters
  • Priority support
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Mega

€62.00 /month

  • 1,190,000 calls / month
  • 50 requests / second
  • Hard cap (429 above quota, no overage)
  • 1.19M calls/month
  • 50 req/sec
  • CI / platform scale
  • Dedicated SLA
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Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Can I Use API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Can I Use API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Can I Use API?
Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.
How much does Can I Use API cost?
Can I Use API has a free tier with 100 calls / month. Paid plans start at €8.50 / month with higher quotas and faster rate limits.
Can I cancel my subscription anytime?
Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.
Is Can I Use API GDPR-compliant?
All requests to Can I Use API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.

Pick an endpoint from the list on the left to see its details and try it.

Code snippets

Sign up to get an API key, then call any path under your slug.

curl https://api.oanor.com/caniuse-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/caniuse-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/caniuse-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);
import requests
r = requests.get(
    "https://api.oanor.com/caniuse-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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