SEO API

Keyword volume, CPC and difficulty, keyword ideas and autocomplete suggestions, domain overview, backlink summary, domain history and on-page audits.

6 endpoints · 1 credit = $0.001. Each endpoint has its own credit cost, listed below. Calls that fail because of a service error are refunded.

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SEO & Keywords

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Keywords

Domains

Backlinks & on-page

Quick presets:

Monthly Search Volume — Region: US

Estimated CPC — Cost per click

Competition Level —

Keywords Found — Expansion keywords

0 keywords

#	Keyword	Monthly Volume	Estimated CPC	Competition / Type	Action
No keyword data yet. Click Analyze SEO Data to inspect.

Organic Traffic — Semrush & KeywordSurfer

Organic Keywords — Ranking keywords in SERP

Semrush Global Rank — Global domain authority rank

Monthly Visits — From Similarweb

Domain Authority (DA) — Moz Domain Authority

Page Authority (PA) — Moz Page Authority

Domain Rating (DR) — Ahrefs DR Scale

Referring Domains — Unique Root Donors

Keyword Rankings Position Distribution Source: KeywordSurfer

Top 3 — Top 3 positions

Top 10 — First page SERP

Top 50 — Pages 2-5

Top 100 — Total Top 100

User Engagement Metrics

Bounce Rate: —

Pages per Visit: —

Avg Duration: —

Traffic Valuation & Brand Metrics

Traffic Cost Index: —

Brand Domain Search Volume: —

Country & Category Rank: —

Infrastructure & TechStack Cross-Enriched

CMS / Platform —

Web Server —

Server IP (IPv4) —

Nameservers (DNS) —

Mail Server (MX) —

Explore backlink profile (Referring Domains) and technical on-page audit for this domain

Aggregated Sources: Semrush KeywordSurfer Similarweb Tranco

1. Backlinks Profile & Domain Authority Semrush & RockingPage (Majestic)

Total Domain Backlinks — Total backlink records

Hostname Backlinks — Host-level backlinks

Referring IPs & Subnets — Subnets: —

Majestic Global Rank — As of: —

2. Technical On-Page SEO Audit URL: —

On-Page SEO Score — Out of 100 score

HTTP Status — Response status code

Response Time — Server response latency

HTML Document Size — Document payload size

On-Page SEO Checklist (12 Tests) 0/12 passed

No audit data yet. Enter domain or URL and run analysis.

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No request yet. Run a test to see the actual response.

What you can build with the SEO API

The SEO API puts keyword and domain data into your own tools with six REST endpoints. Use it as a keyword data API (volume, CPC, suggestions and ideas), a backlink API (referring domains and link summary), a domain overview API and an on-page audit. Domain reports tell you which data sources answered.

Keyword data API: volume and CPC

Send up to 10 keywords per request to get monthly search volume, CPC and competition for a country. Rank a whole keyword list in code instead of exporting it from a tool.

POST /api/v1/seo/keywords/metrics

Keyword suggestions from autocomplete

Fetch live Google autocomplete search queries to discover high-intent long-tail phrases and consumer search patterns.

GET /api/v1/seo/keywords/suggestions

Keyword ideas and related queries

Expand one seed keyword into related search ideas, then feed them back into the metrics call to find phrases worth targeting.

POST /api/v1/seo/keywords/ideas

Backlink API: check any domain

Get a backlink summary for your site or a competitor with the figures of every data source that answered. Compare link profiles without opening a dashboard.

GET /api/v1/seo/domains/{domain}/backlinks

SEO report API: domain overview

Pull a domain overview with organic traffic and keyword figures, plus the detected CMS, web server and MX records, to start a competitor report.

GET /api/v1/seo/domains/{domain}

Audit a page before you publish

Run the on-page audit on a public URL to check the title, meta description, headings, canonical, robots, structured data and more in one call.

POST /api/v1/seo/on-page-audit

Guides: Backlink API: check a domain's backlinks in Python · Keyword data API: get search volume and CPC in code · SEO report API: build a domain ranking report · DataForSEO API alternative: one SEO API for keywords and links

Try it free, no account needed: DNS lookup · Backlink checker · Domain & Website Traffic Checker

How the SEO API works

1
Pick the report

Keyword reports take keywords, domain reports take a hostname and the audit takes a full public URL.
2
Call the endpoint

For example POST /api/v1/seo/keywords/metrics with a keywords array and a country code, or GET /api/v1/seo/domains/example.com/backlinks.
3
Read data with its source

Domain responses list the sources that answered and any that did not, so partial data is visible instead of hidden.

Try the SEO & Keywords API with your own account

New accounts receive 1,000 credits after verification, enough for about 1000 calls to "SEO Keyword Suggestions".

Get 1,000 free credits Read the docs

Using SEO & Keywords

Keyword operations use keywords; domain reports use a hostname; on-page audit uses a full public URL.

Read search volume, CPC and competition with their source and market context. Missing metrics are not estimated automatically.

Domain history, backlinks and technical page checks are separate reports. A successful audit does not confirm Google indexing.

SEO API endpoints and pricing

OpenAPI 3.1 JSON

Select an operation above and open API & Docs for parameters and cURL, JavaScript, Python or PHP examples. The web tool uses your signed-in session; external integrations use a Bearer API key.

Method	Endpoint	Cost
POST	SEO Keyword Metrics `/api/v1/seo/keywords/metrics` Try it Helpful?	2 credit / request≈ $0.002
GET	SEO Keyword Suggestions `/api/v1/seo/keywords/suggestions` Try it Helpful?	1 credit / request≈ $0.001
POST	SEO Keyword Ideas `/api/v1/seo/keywords/ideas` Try it Helpful?	2 credit / request≈ $0.002
GET	SEO Domain Overview `/api/v1/seo/domains/{domain}` Try it Helpful?	5 credit / request≈ $0.005
GET	SEO Backlinks Summary `/api/v1/seo/domains/{domain}/backlinks` Try it Helpful?	2 credit / request≈ $0.002
POST	SEO On-Page Audit `/api/v1/seo/on-page-audit` Try it Helpful?	2 credit / request≈ $0.002

SEO API: frequently asked questions

What data does the SEO API return?

Keyword volume, CPC and competition, keyword suggestions and ideas, a domain overview, a backlink summary and an on-page audit. It works as a keyword research API and, with the backlink summary, as a backlink checker API.

Is there a backlink API I can call from code?

Yes. GET /api/v1/seo/domains/{domain}/backlinks returns the backlink summary of a domain, with the figures of each data source that answered and a list of any that did not. See the guide on checking backlinks in Python for a working script.

How do I get keyword volume and CPC from an API?

Send up to 10 keywords and a country code to POST /api/v1/seo/keywords/metrics. It returns search volume, CPC and competition for each keyword, and a request is billed once however many keywords it holds.

Can I build a domain ranking report with the API?

Yes. Combine the domain overview and the backlink summary in a short script. The guide on building a domain ranking report shows how and how to benchmark competitor visibility.

Is this an SEO checker API or an SEO tool API?

It is both. Use it as an SEO checker API to audit a page, as an SEO metrics and SEO score source for a domain, and as an SEO tool API behind your own dashboard or scheduled SEO report.

Are the numbers exact?

They are estimates from third-party data sources and can differ between sources. Missing metrics are not estimated for you.

Does a good audit score mean Google indexed my page?

No. The audit checks the page itself. Indexing is decided by Google and should be checked in Search Console.

Is there a free SEO API?

There is no free plan, but the free backlink checker, domain checker and DNS lookup tools need no account. New accounts receive 1,000 credits after verification.

Is this a DataForSEO or Semrush API alternative?

It covers the same core jobs through one API: keyword volume and CPC, keyword ideas, backlinks, domain overview, and on-page audits. You pay per request with credits and get the data sources listed in each response. See the comparison guide for details.

How is it billed?

Per request, with different prices per endpoint, shown in the table below. New accounts receive 1,000 credits after verification.

Before integrating

Live and example data

Check the Live or Sandbox label before running. Examples demonstrate the response structure and do not guarantee live service status.

Credits and limits

Pricing depends on the endpoint and billable units. Failed live requests are not replaced with billable examples. Check your account limits before running repeated requests.

View pricing

Handling errors

Keep the request ID for troubleshooting. For 429, respect Retry-After when provided. If a create or delete request loses its connection, check the resource state before retrying.

Related APIs

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Often used together: DNS Lookup API, BIN Lookup & Tech Stack · Shopify Product Scraper API · Text to Speech API & YouTube Transcript API · Proxy API

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SEO API

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