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API · /codeexec-api

Code Execution API

healthy 4,325 Subscribers

Compile and run code in 35+ programming languages from a single API call — no key, no container to manage. Send source code plus an optional stdin, compiler options and runtime arguments, pick a language (python, c++, java, go, rust, c#, javascript, typescript, ruby, php, kotlin, swift, haskell, and more) or an explicit compiler version, and get back the exit code, stdout, stderr and compiler messages. List every supported language with its default compiler, browse the full compiler catalogue (175+ compilers across versions) and filter it by language. Set save=true to also get a shareable permlink. Execution runs in a sandboxed upstream and is always live (never cached). 4 endpoints, backed by the public Wandbox service. Built for online IDEs, coding-education platforms, automated grading, interview tools and "run this snippet" features. No upstream key, no cache.

#code-execution #compiler #sandbox #developer-tools #ide #utilities
api.oanor.com/codeexec-api
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Machine-readable spec so AI agents can integrate this API.

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

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

Code Execution API — live data on the oanor API marketplace

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
734 ms
Server probes · 24h
Subscribers
4,325
active
Total calls
76
last 7 days
status Full status page → · 8 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 2,100 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 2,100 runs/month
  • 2 req/sec
  • 35+ languages
  • No credit card
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Starter

€9.40 /month

  • 46,000 calls / month
  • 8 requests / second
  • Hard cap (429 above quota, no overage)
  • 46k runs/month
  • 8 req/sec
  • stdin, args, compiler options
  • Email support
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Pro

€29.50 /month

  • 235,000 calls / month
  • 20 requests / second
  • Hard cap (429 above quota, no overage)
  • 235k runs/month
  • 20 req/sec
  • Online IDE / grading scale
  • Priority support
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Mega

€64.00 /month

  • 1,260,000 calls / month
  • 50 requests / second
  • Hard cap (429 above quota, no overage)
  • 1.26M runs/month
  • 50 req/sec
  • Education-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 Code Execution API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Code Execution API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Code Execution 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 Code Execution API cost?
Code Execution API has a free tier with 100 calls / month. Paid plans start at €9.40 / 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 Code Execution API GDPR-compliant?
All requests to Code Execution 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/codeexec-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/codeexec-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/codeexec-api/SOME_PATH");
curl_setopt($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/codeexec-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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