# SEO Score API review (2026): is the free plan enough? > SEO audit API that scores any URL on 80+ checks, AI readability too Checked Oct 23, 2026 ยท graded Oct 24, 2026 by ToolGPA. 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. - **Category:** SERP & SEO Data APIs - **Made by:** 45Squared - **Website:** https://seoscoreapi.com - **Runs on:** Web - **Who should skip it:** Skip it if you need backlinks, keyword research or rank tracking, which it doesn't do. - **Facts last checked:** Oct 23, 2026 ## Pricing As of Oct 23, 2026, SEO Score API has a free plan, and paid plans start at $5 per month for 200 audits, billed monthly. - **Pricing model:** Free plan - **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. - **Free trial:** None listed. | Plan | Price | What you get | | --- | --- | --- | | 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. | Read from https://seoscoreapi.com/ on Oct 23, 2026. Prices change, so confirm with SEO Score API before buying. ## Ways to pay less - **Two months free with annual billing** (Annual discount): 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. Source: https://seoscoreapi.com/ ## Key features - **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. ## 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. ## ToolGPA grades **GPA: 2.6 out of 4**, graded Oct 24, 2026. 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. - **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. These are ToolGPA's own grades. 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. ## Where it stands among 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. - 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. The category's chart of price against score: https://toolgpa.com/charts/seo-data-apis ## Keep it, or make your own? **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. - You could not: A crawler that checks every page of a site. - You could not: The same prompts asked of ChatGPT, Perplexity, Gemini and Google's AI answers every day, and the answers kept. - You could not: It plugs into other products, GitHub Actions, n8n and Claude Code among them, and has an API. A judgement by ToolGPA from this listing, by rules that are the same for every tool. Nothing was built to test it. ## Works with GitHub Actions, n8n, Claude Code, Cursor, Vercel, Netlify **Tags:** Site audit, Public API, AI search visibility ## Alternatives - [DataForSEO](https://toolgpa.com/tools/dataforseo): Pay-as-you-go APIs for SERP, keyword, backlink and AI mention data. [Compare](https://toolgpa.com/compare/dataforseo-vs-seo-score-api) - [Lighthouse](https://toolgpa.com/tools/lighthouse): Google's open-source audit of page speed, accessibility and SEO. [Compare](https://toolgpa.com/compare/lighthouse-vs-seo-score-api) - [SEO Site Checkup](https://toolgpa.com/tools/seo-site-checkup): SEO audits, rank tracking and AI brand visibility for small sites. [Compare](https://toolgpa.com/compare/seo-score-api-vs-seo-site-checkup) - [Screaming Frog SEO Spider](https://toolgpa.com/tools/screaming-frog): Desktop website crawler for technical SEO audits. [Compare](https://toolgpa.com/compare/screaming-frog-vs-seo-score-api) - [SEOptimer](https://toolgpa.com/tools/seoptimer): SEO audit tool with white-label reports and a lead-generation widget. [Compare](https://toolgpa.com/compare/seo-score-api-vs-seoptimer) ## Sources The prices, plans, platforms and features above were read from these pages on Oct 23, 2026: - https://seoscoreapi.com/ - https://seoscoreapi.com/about - https://seoscoreapi.com/developers Page: https://toolgpa.com/tools/seo-score-api Listed by ToolGPA (toolgpa.com).