SEO Data API

The SEO API built for developers

Backlinks, domain authority, and 20 more endpoints. Starting at $0.003 per request. No subscription.

Get free API key Documentation

Endpoints

3B+

Pages indexed

<200ms

Avg response

$0.003

Per request

$ curl -s https://api.rankparse.com/v1/backlinks \
    -H "X-API-Key: rp_your_key" \
    -d "domain=stripe.com&limit=2" | jq .

{
  "data": [
    {
      "from_url": "https://news.ycombinator.com/item?id=41032843",
      "to_url": "https://stripe.com/docs/payments",
      "anchor_text": "Stripe Docs"
    }
  ],
  "credits_used": 2,
  "credits_remaining": 998
}

10-50x cheaper than Ahrefs, Moz, or Semrush

Same backlink counts, domain authority scores, and anchor text data — without the $100-400/mo subscription. You pay per request, and credits never expire.

	RankParse	Others
Backlinks lookup	$0.006	$0.05-0.20
Domain authority	$0.003	$0.02-0.10
Monthly minimum	$0	$99-399
Data freshness	Quarterly	Daily

Data updates quarterly. For programmatic SEO, link building tools, and AI agent workflows, that's the right tradeoff.

What you get

Everything maps to a REST endpoint. JSON in, JSON out.

Link data

Inbound backlinks, referring domains, anchor text distribution, outbound links. Filter by domain, URL, or date.

Domain metrics

Authority score (0-100) computed from billions of pages. Domain rank. Top pages by inbound links.

Page-level data

Title tags, meta descriptions, H1s, status codes, tech stack detection, and language. Batch up to 100 domains.

MCP server

Claude, Cursor, and Windsurf can query SEO data directly. Point your agent at the server URL.

22 endpoints

One API key. X-API-Key header. JSON in, JSON out.

Endpoint	Path	Credits
Backlinks	/v1/backlinks	2
Referring Domains	/v1/referring-domains	2
Anchor Text	/v1/anchor-text	2
Top Pages	/v1/top-pages	2
Domain Authority	/v1/domain-authority	1
Outbound Links	/v1/outbound-links	2
Site Explorer	/v1/site-explorer	10
Batch Lookup	/v1/batch	2/domain
Tech Stack	/v1/tech-stack	2
Page Metadata	/v1/page-meta	2
URL Index	/v1/url-index	2
Domain Rank	/v1/domain-rank	2