The SEO Score API Insider’s Guide
Everything we know about SEO Score API in one document: what it costs, its grades, getting a refund, getting help and what else to look at. Read it here, or keep a copy.
SEO Score API
The Insider’s Guide
SEO audit API that scores any URL on 80+ checks, AI readability too
Every plan, grade, refund rule and rival among SERP and SEO data APIs, read from SEO Score API’s own pages.
Made by 45Squared · checked Oct 23, 2026 · toolgpa.com
Contents
- 01WelcomeWhat it is, who it suits, its grades and the ten things to know first
- 02What it costsEvery plan, the free plan, ways to pay less and how prices have moved
- 03What it doesIts main features, where it runs, what it works with and who makes it
- 04Where it standsIts grades against its category, and whether to keep it or make your own
- 05The alternativesThe tools it is most often weighed against, side by side
- 06Quick answersThe questions people ask about it, each answered in a line or two
- 07About ToolGPAWho made this guide, what else is on the site, and how to cite it
ToolGPA put this guide together from SEO Score API’s own pages, its app-store listings and our grades. Every fact in it is on SEO Score API’s page too, where it is kept up to date. Checked Oct 23, 2026.
Part 01 · Overview
Welcome
What it is, who it suits, its grades and the ten things to know first
2.6
GPA, above 31 of the 38 other SERP and SEO data APIs we grade
SEO Score API is a REST API that audits a single URL on 80+ checks covering on-page and technical SEO, social tags, performance, accessibility and how readable the page is to AI crawlers, and returns a 0 to 100 score, a letter grade and ranked fixes as JSON. Paid plans add SXO, AEO and AIO scores, AI citation tracking and, from Pro, a deep audit drawn from a catalog of 14,000+ checks. It is in public beta and is made by the SEO agency 45Squared.
To get you started, here are 9 things to know about SEO Score API, taken from its own pages and our grades.
- 1
Best for SEO scores for single pages from your own code
SEO Score API audits one URL at a time on 80+ checks, AI crawler readability included, and returns a 0 to 100 score, a grade and ranked fixes as JSON.
- 2
Paid plans start at $5 a month
As its pricing page puts it: $5 per month for 200 audits, billed monthly.
- 3
There is a free plan
20 audits a month scored on 50+ checks, showing 2 checks per category and the top 2 fixes, at 2 requests a minute. No card needed.
- 4
It runs on Web
Web.
- 5
80+ checks per URL
Titles, headings, canonical tags, robots.txt, sitemaps, structured data, Open Graph, page weight and accessibility, each marked pass, warning or fail with a fix.
- 6
AI readability and GEO audits
26 checks on whether AI crawlers such as GPTBot and ClaudeBot can read a page, including llms.txt and bot access; GEO audits measure visibility to AI search.
- 7
SXO, AEO and AIO scores
Paid plans score search experience, how well a page answers questions for snippets and AI Overviews, and how easily language models can take it in.
- 8
A 2.6 GPA, above 31 of 38
That is against the other SERP and SEO data APIs we grade, on value, the free plan, features, ease of use and platforms.
- 9
Keep it
Nothing SEO Score API does is plain enough to make in a weekend. The 3 things listed below take a company.
SEO Score API at a glance
- Pricing
- Free plan, from $5 per month for 200 audits, billed monthly
- Free plan
- Yes
- Free trial
- None stated
- Runs on
- Web
- Made by
- 45Squared
- Category
- SERP & SEO Data APIs
- Our grade
- 2.6 GPA, good
The report card
Best for SEO scores for single pages from your own code
SEO Score API audits one URL at a time on 80+ checks, AI crawler readability included, and returns a 0 to 100 score, a grade and ranked fixes as JSON. It audits pages only, with no backlinks, keywords or rankings, the deep audit waits on Pro at $39 a month, and the product is still in public beta.
| Subject | Grade | Comment |
|---|---|---|
| Value for money | A | Starter is $5 a month for 200 audits with all 80+ checks, under 60% of this category's cheaper quarter, and Pro is $39 for 5,000 with 20 deep audits. Google's Lighthouse, one of its listed alternatives, is free, though. |
| Free plan and trial | C | A free plan for good with no card, but tight: 20 audits a month on 50+ checks, showing only 2 checks per category and the top 2 fixes, at 2 requests a minute. |
| Features | C | Page audits done fully: 80+ checks, AI readability, SXO, AEO and AIO scores, monitoring, history and a 14,000+ check deep audit from Pro. It's a smaller job, though: no backlinks, keyword research or rank tracking, which the vendor says to get from Ahrefs or Moz. |
| Ease of use | C | Judged on how fast a developer gets a first result: send a URL and get a score back, with Python, Node.js and Go clients and a GitHub Action. No rating on record. |
| Platforms and integrations | B | Web, with an API, Python, Node.js and Go clients, an n8n node, an MCP server, a Claude Code skill and a GitHub Action, plus Vercel and Netlify. No desktop or phone app, so B is the top. |
An A is worth 4 points, a B 3, a C 2, a D 1 and an F nothing. The GPA is the average of the five.
Who SEO Score API is for
- Fits if you want a build to fail when a page's SEO score drops
- Works for developers adding page checks to their own apps or dashboards
Who it is not for
- Skip it if you need backlinks, keyword research or rank tracking, which it doesn't do
- Tight if you're on Free, with 20 audits a month and only 2 checks per category shown
- Pricey if you want Deep Site Audits, which start on Pro at $39 a month or $12 for a single audit
- Watch out: extra AI citation checks cost $10 for 500, and the pages don't say which AI engines are checked
- Watch out: the product is labeled as being in public beta
Good to know
Good for
- Developers adding SEO checks to their own apps or dashboards
- Failing a deploy when a page's SEO score drops
- Agencies grading many client pages, including for AI crawlers
Worth knowing
- It audits pages only: no backlinks, keyword research or rank tracking, which the vendor says to get from suites such as Ahrefs or Moz.
- Deep Site Audits come only with Pro (20 a month) and Ultra (100), or as credit packs from $12 for one audit to $499 for 100.
- Extra AI citation checks cost $10 for 500 or $36 for 2,000; the pages read do not say which AI engines are checked.
- The product is labeled as being in public beta.
Part 02 · Pricing
What it costs
Every plan, the free plan, ways to pay less and how prices have moved
$5
A month to start. There is a free plan too
SEO Score API has a free plan. Paid plans start at $5 per month for 200 audits, billed monthly.
Google's Lighthouse, one of its listed alternatives, is free, though.
Free
$0
20 audits a month on 50+ checks, with partial results, no history and no AI citation tracking.
Starter
$5
per month for 200 audits, billed monthly
All 80+ checks, SXO, AEO and AIO scores, AI citation tracking with 15 prompts, 5 monitored URLs and 30 days of history.
Basic
$15
per month for 1,000 audits, billed monthly
Adds 1 GEO audit a month, 30 tracked prompts, 10 monitored URLs and 90 days of history.
Pro
$39
per month for 5,000 audits, billed monthly
20 Deep Site Audits, 5 GEO audits, 75 tracked prompts, 25 monitored URLs, a year of history and priority support.
Ultra
$99
per month for 25,000 audits, billed monthly
100 Deep Site Audits, 10 GEO audits, 200 tracked prompts, 50 monitored URLs, unlimited history and dedicated support.
Enterprise
Custom
Custom audit volume and limits on an annual agreement with invoicing. Through sales.
The free plan
20 audits a month scored on 50+ checks, showing 2 checks per category and the top 2 fixes, at 2 requests a minute. No card needed.
Read from seoscoreapi.com on Oct 23, 2026.
Ways to pay less
Annual discount
Two months free with annual billing
SEO Score API bills paid plans yearly for the price of 10 months: Starter is $50 a year and Pro $390, with monthly allowances unchanged.
Stated on seoscoreapi.com
Part 03 · Features
What it does
Its main features, where it runs, what it works with and who makes it
1
Place it runs: Web
SEO audit API that scores any URL on 80+ checks, AI readability too. Here is what it does, as its own site describes it, and what it covers: public API, site audit, AI search visibility.
It's a smaller job, though: no backlinks, keyword research or rank tracking, which the vendor says to get from Ahrefs or Moz.
- 80+ checks per URL
- Titles, headings, canonical tags, robots.txt, sitemaps, structured data, Open Graph, page weight and accessibility, each marked pass, warning or fail with a fix.
- AI readability and GEO audits
- 26 checks on whether AI crawlers such as GPTBot and ClaudeBot can read a page, including llms.txt and bot access; GEO audits measure visibility to AI search.
- SXO, AEO and AIO scores
- Paid plans score search experience, how well a page answers questions for snippets and AI Overviews, and how easily language models can take it in.
- Deep Site Audit
- An asynchronous audit of about 90 seconds against a 14,000+ check catalog across nine areas, with an AI pass and a scan for leaked API keys.
- Monitoring and history
- Watch scores on a set of URLs, pull a page's score history, run batch audits, and share HTML reports and score badges.
- SDKs, CI and agents
- Python, Node.js and Go clients, an n8n node, an MCP server, a Claude Code skill and a GitHub Action that fails a build when a score drops.
Where it runs
- Web
What it works with
- GitHub Actions
- n8n
- Claude Code
- Cursor
- Vercel
- Netlify
SEO Score API is made by 45Squared.
Part 04 · Standing
Where it stands
Its grades against its category, and whether to keep it or make your own
31/38
Other SERP and SEO data APIs it is graded above
SEO Score API's GPA of 2.6 is higher than 31 of the 38 other SERP and SEO data APIs we grade, and level with 3.
It stands best on value for money (A, above 35 of 38) and worst on ease of use (C, above 0).
Its paid plans start at $5 a month, against a middle price of $29.49 for the category: 1 of the 25 others that charge start lower.
On features, ease of use and platforms it scores 2.3 out of 4. 1 tool scores higher and costs less.
Each grade against the category
Every bar is all 39 SERP and SEO data APIs we grade, cut by the letter each got. SEO Score API’s own letter is outlined.
- AValue for moneyAbove 35 of 38
- CFree plan and trialAbove 2 of 38
- CFeaturesAbove 1 of 38
- CEase of useAbove 0 of 38
- BPlatforms and integrationsAbove 9 of 38
Price against what you get
Each dot is one of 26 SERP and SEO data APIs. Further left costs less; higher up scores better on features, ease of use and platforms. SEO Score API is the marked dot.
What paid plans start at, a month (each step along is roughly double) →
Keep it, or make your own?
Whether this is something you could build for yourself with an AI app builder, and what you would give up.
Keep it
Nothing SEO Score API does is plain enough to make in a weekend. The 3 things listed below take a company.
It is one of the better ones too: its GPA of 2.6 is higher than 31 of the 38 other SERP and SEO data APIs we grade. It costs $60 a year.
What you could not
- A crawler that checks every page of a site.
- The same prompts asked of ChatGPT, Perplexity, Gemini and Google's AI answers every day, and the answers kept.
- It plugs into other products, GitHub Actions, n8n and Claude Code among them, and has an API.
What this rests on. SEO Score API’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
Part 05 · Alternatives
The alternatives
The tools it is most often weighed against, side by side
DataForSEO, Lighthouse, SEO Site Checkup, Screaming Frog SEO Spider and SEOptimer
The 5 tools SEO Score API is most often weighed against, with where each one differs from it.
- 2.8GPA
DataForSEO
Free trial · from $50
Pay-as-you-go APIs for SERP, keyword, backlink and AI mention data.
- SEO Score API has a free plan. DataForSEO does not, though it has a free trial.
- DataForSEO also covers keyword research, backlink analysis and sERP API.
- 3.2GPA
Lighthouse
Free
Google's open-source audit of page speed, accessibility and SEO.
- Only Lighthouse lists a browser extension.
- Lighthouse is open source, according to its own site.
- SEO Score API also covers AI search visibility.
- 1.8GPA
SEO Site Checkup
Free trial · from $29/mo
SEO audits, rank tracking and AI brand visibility for small sites.
- SEO Score API has a free plan. SEO Site Checkup does not, though it has a free trial.
- SEO Site Checkup also covers reports, keyword research, rank tracking, backlink analysis and page speed.
- 2.4GPA
Screaming Frog SEO Spider
Free plan · from $279/yr
Desktop website crawler for technical SEO audits.
- Only SEO Score API lists a web app.
- Only Screaming Frog SEO Spider lists Windows, macOS and Linux apps.
- SEO Score API also covers AI search visibility.
- 2.6GPA
SEOptimer
Free plan · from $21.75/mo
SEO audit tool with white-label reports and a lead-generation widget.
- Only SEOptimer lists a browser extension.
- SEO Score API also covers AI search visibility.
- SEOptimer also covers reports, keyword research, rank tracking and backlink analysis.
Part 06 · Questions
Quick answers
The questions people ask about it, each answered in a line or two
14
Questions, each answered in a line or two
The short version of everything above, for when you only need the answer. Each one is told in full in its part of the guide.
Is SEO Score API free?
SEO Score API has a free plan. 20 audits a month scored on 50+ checks, showing 2 checks per category and the top 2 fixes, at 2 requests a minute.
How much does SEO Score API cost?
SEO Score API lists 6 plans. Free: $0.
What platforms does SEO Score API work on?
SEO Score API is available on Web.
Does SEO Score API offer any discounts?
SEO Score API publicly lists the following: Two months free with annual billing.
Does SEO Score API have an Android app?
No Android app was listed when its pages were read on Oct 23, 2026. SEO Score API is listed for Web.
Does SEO Score API have an iPhone app?
No iPhone app was listed when its pages were read on Oct 23, 2026. SEO Score API is listed for Web.
Is SEO Score API open source?
SEO Score API is not described as open source on its own site, as read on Oct 23, 2026.
Does SEO Score API have an API?
Yes. SEO Score API offers a public API, according to its own site.
What does SEO Score API integrate with?
SEO Score API's listing names GitHub Actions, n8n, Claude Code, Cursor, Vercel and Netlify.
Who makes SEO Score API?
SEO Score API is made by 45Squared.
What are the alternatives to SEO Score API?
The closest alternatives to SEO Score API in our directory are DataForSEO, Lighthouse, SEO Site Checkup, Screaming Frog SEO Spider and SEOptimer.
How does SEO Score API compare with other SERP and SEO data APIs?
SEO Score API's GPA of 2.6 is higher than 31 of the 38 other SERP and SEO data APIs we grade, and level with 3.
Is SEO Score API good value for money?
ToolGPA grades SEO Score API A for value for money. Its paid plans start at $5 a month, against a middle price of $29.49 for the category: 1 of the 25 others that charge start lower.
Could I make my own version of SEO Score API?
Nothing SEO Score API does is plain enough to make in a weekend. The 3 things listed below take a company.
Where this guide comes from
The prices, plans, platforms and features were read from SEO Score API’s own pages on Oct 23, 2026, and the grades were given on Oct 24, 2026. Graded from this listing, whose facts were read from SEO Score API's own pages on 23 October 2026. Not based on using the product, and shorter than our full reviews.
Every tool we list gets five grades, A to F, each with its reason, and a GPA that averages them. How each is decided is at toolgpa.com/grades. This guide is ToolGPA’s own work; it is not made, paid for or approved by 45Squared. Prices change, so check seoscoreapi.com before you buy.
Part 07 · About
About ToolGPA
Who made this guide, what else is on the site, and how to cite it
3,189
Tools graded, in 94 categories
ToolGPA grades software the way a school report grades a pupil: five subjects, a letter for each with the reason written beside it, and a GPA that averages them. Prices, plans and platforms are read from each maker’s own pages and dated, so you always know how fresh a figure is.
Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Every tool on the site has a guide like this one, free to download and pass on. It all lives at toolgpa.com.
3,189
tools graded
94
categories
426
price changes on record
579
apps priced in 12 countries
What else is on toolgpa.com
- SEO Score API, kept up to dateEverything in this guide, with prices and grades as they are todaytoolgpa.com/tools/seo-score-api
- How grades are givenThe rules behind every letter and every GPAtoolgpa.com/grades
- Value chartsWhat each tool costs against what it scores, for every categorytoolgpa.com/charts
- CompareAny two tools side by side, plan by plantoolgpa.com/compare
- Price changesEvery price rise and cut on record, each with its sourcetoolgpa.com/price-changes
- Prices by countryWhat apps cost on the App Store in 12 countriestoolgpa.com/prices-by-country
- Pay lessEvery public discount: yearly billing, students, nonprofitstoolgpa.com/save
- Keep or makeWhich tools are worth paying for, and which you could build yourselftoolgpa.com/keep-or-make
Scan for the live page
Prices and grades as they are today
Quoting this guide?
Please name ToolGPA and link to the live page, so readers can check the figures for themselves:
ToolGPA, "SEO Score API: The Insider's Guide", checked Oct 23, 2026. https://toolgpa.com/tools/seo-score-api
Know someone choosing between SERP and SEO data APIs?
Send them this guide: toolgpa.com/tools/seo-score-api/guide
ToolGPA elsewhere: youtube.com/@toolgpa
See our other guides
The best-graded SERP and SEO data APIs after SEO Score API, each with an Insider's Guide of its own.
- SERP & SEO Data APIs Insider's GuideEvery one of the 39 SERP and SEO data APIs we grade, compared
- Apify Insider's GuideScraping platform with a store of ready-made Actors, Google included2.8 GPA
- DataForSEO Insider's GuidePay-as-you-go APIs for SERP, keyword, backlink and AI mention data2.8 GPA
- Decodo SERP Scraping API Insider's GuideSERP scraping for Google, Bing and more, inside a web data API2.8 GPA
Choosing software? Every tool graded, every price dated.
Compare tools at toolgpa.com ›Everything in this guide is ToolGPA’s own summary of what SEO Score API’s pages, its app-store listings and public reviews said on the dates shown. Grades are our judgement under the rules at toolgpa.com/grades. Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. SEO Score API is a trademark of its owner, and this guide is not made, paid for or approved by 45Squared. Prices and plans change: check seoscoreapi.com before you buy.