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API · /seo-api

SEO API

healthy 3,916 Subscribers

Run an on-page SEO audit on any URL — title and meta-description analysis, heading structure, content length, image alt coverage, canonical / viewport / Open Graph checks and an internal/external link breakdown — with an overall 0–100 score. Plus a dedicated link analysis endpoint.

#seo #audit #on-page #meta-tags #analysis #marketing #developer
api.oanor.com/seo-api
Get an API key Try in playground → Contact provider

Machine-readable spec so AI agents can integrate this API.

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

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

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
407 ms
Server probes · 24h
Subscribers
3,916
active
Total calls
94
last 7 days
status Full status page → · 94 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 600 calls / month
  • 1 requests / second
  • Hard cap (429 above quota, no overage)
  • 600 audits/month
  • 1 req/sec
  • Full on-page score + meta checks
  • No credit card
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Basic

€16.00 /month

  • 25,000 calls / month
  • 5 requests / second
  • Hard cap (429 above quota, no overage)
  • 25,000 audits/month
  • 5 req/sec
  • All on-page checks + link breakdown
  • Commercial use allowed
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Pro

€49.00 /month

  • 120,000 calls / month
  • 15 requests / second
  • Hard cap (429 above quota, no overage)
  • 120,000 audits/month
  • 15 req/sec
  • Bulk-URL auditing
  • Email support
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Mega

€129.00 /month

  • 500,000 calls / month
  • 40 requests / second
  • Hard cap (429 above quota, no overage)
  • 500,000 audits/month
  • 40 req/sec
  • Priority queue + 99.9% SLA
  • Priority support
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Related APIs

Other APIs with overlapping tags.

Stack Exchange API

Search Stack Overflow and the Stack Exchange network — questions by relevance with scores, answer counts and tags, full question details, and user profiles with reputation, badges and location. Ideal for developer tools, tech-trend monitoring, Q&A aggregation and reputation lookups.

api.oanor.com/stackexchange-api

URL Tools API

Unfurl link previews — title, description, image, site name and favicon (Open Graph + meta tags) — and expand / unshorten URLs by following redirects to their final destination. Perfect for chat unfurls, link cards and resolving short links.

api.oanor.com/url-api

Cars / VIN API

Decode any Vehicle Identification Number (VIN) into make, model, year, body class, engine, fuel type, drivetrain and plant — and browse vehicle makes and models by type and year. Powered by the official NHTSA vPIC database.

api.oanor.com/cars-api

Sentiment & NLP API

Analyse text in real time: sentiment scoring (positive / negative / neutral with the matched words), automatic language detection across 180+ languages, and a combined analysis endpoint with text statistics. No setup, no model hosting.

api.oanor.com/nlp-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for SEO API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call SEO API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for SEO 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 SEO API cost?
SEO API has a free tier with 100 calls / month. Paid plans start at €16.00 / 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 SEO API GDPR-compliant?
All requests to SEO 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/seo-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/seo-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/seo-api/SOME_PATH");
curl_setopt($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/seo-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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