SEOScore API

API ID 14801

SEO audit API with a deterministic 0-100 score, per-check evidence, a ready fix list, and a GEO score for AI-search visibility.

API Documentation

Endpoints

Request
audit one page (POST /audit with JSON body {"url": "..."} also works). Returns the audit object: score, maxScore, grade, geoScore, statusCode, responseTimeMs, pageBytes, truncated, plus the checks array (each check with id, category, label, status, points, evidence details and fix text).
Endpoint ID: 38378
GET https://zylalabs.com/api/14801/seoscore+api/38378/audit+one+page
INPUT PARAMETERS

Audit one page — Endpoint Features

Object Description
url Required URL of the public page to audit

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

url
API EXAMPLE RESPONSE
JSON
{
    "url": "https://example.com/",
    "finalUrl": "https://example.com/",
    "ok": true,
    "score": 29,
    "maxScore": 100,
    "grade": "F",
    "geoScore": 40,
    "statusCode": 200,
    "responseTimeMs": 16,
    "pageBytes": 577,
    "truncated": false,
    "checks": [
        {
            "id": "title_present",
            "category": "meta",
            "label": "Title tag present",
            "status": "pass",
            "points": 8,
            "maxPoints": 8,
            "details": "Title: \"Example Domain\"",
            "fix": null
        },
        {
            "id": "title_length",
            "category": "meta",
            "label": "Title length 30-60 chars",
            "status": "warn",
            "points": 0,
            "maxPoints": 4,
            "details": "Title is 14 characters.",
            "fix": "Rewrite the title to 30-60 characters so it is not truncated in search results."
        },
        {
            "id": "description_present",
            "category": "meta",
            "label": "Meta description present",
            "status": "fail",
            "points": 0,
            "maxPoints": 8,
            "details": "No meta description found.",
            "fix": "Add a meta description of 70-160 characters summarising the page."
        },
        {
            "id": "description_length",
            "category": "meta",
            "label": "Description length 70-160 chars",
            "status": "fail",
            "points": 0,
            "maxPoints": 4,
            "details": "No description to measure.",
            "fix": "Adjust the meta description to 70-160 characters."
        },
        {
            "id": "canonical_present",
            "category": "meta",
            "label": "Canonical URL declared",
            "status": "warn",
            "points": 0,
            "maxPoints": 3,
            "details": "No rel=canonical link found.",
            "fix": "Add <link rel=\"canonical\"> pointing at the preferred URL for this page."
        },
        {
            "id": "viewport_present",
            "category": "meta",
            "label": "Viewport meta present (mobile)",
            "status": "warn",
            "points": 0,
            "maxPoints": 3,
            "details": "No viewport meta found.",
            "fix": "Add <meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">."
        },
        {
            "id": "h1_single",
            "category": "content",
            "label": "Exactly one H1 heading",
            "status": "fail",
            "points": 0,
            "maxPoints": 8,
            "details": "No H1 found.",
            "fix": "Use exactly one H1 that states the page's main topic."
        },
        {
            "id": "h2_present",
            "category": "content",
            "label": "H2 subheadings present",
            "status": "warn",
            "points": 0,
            "maxPoints": 4,
            "details": "0 H2 heading(s) found.",
            "fix": "Structure the page with H2 subheadings for each main section."
        },
        {
            "id": "word_count",
            "category": "content",
            "label": "At least 300 words of visible text",
            "status": "fail",
            "points": 0,
            "maxPoints": 6,
            "details": "27 words of visible text.",
            "fix": "Expand the page copy to at least 300 words of substantive, server-rendered text."
        },
        {
            "id": "image_alt",
            "category": "content",
            "label": "Image alt text coverage >= 80%",
            "status": "pass",
            "points": 4,
            "maxPoints": 4,
            "details": "No <img> tags on the page.",
            "fix": null
        },
        {
            "id": "lang_present",
            "category": "content",
            "label": "html lang attribute present",
            "status": "warn",
            "points": 0,
            "maxPoints": 3,
            "details": "No lang attribute on <html>.",
            "fix": "Add a lang attribute to the <html> tag, e.g. <html lang=\"en\">."
        },
        {
            "id": "https",
            "category": "technical",
            "label": "Served over HTTPS",
            "status": "pass",
            "points": 6,
            "maxPoints": 6,
            "details": "Final URL: https://example.com/",
            "fix": null
        },
        {
            "id": "status_200",
            "category": "technical",
            "label": "HTTP status 200",
            "status": "pass",
            "points": 6,
            "maxPoints": 6,
            "details": "Status: 200",
            "fix": null
        },
        {
            "id": "indexable",
            "category": "technical",
            "label": "Page is indexable (no noindex)",
            "status": "pass",
            "points": 5,
            "maxPoints": 5,
            "details": "No noindex directive; Googlebot allowed.",
            "fix": null
        },
        {
            "id": "robots_txt",
            "category": "technical",
            "label": "robots.txt present",
            "status": "warn",
            "points": 0,
            "maxPoints": 4,
            "details": "No robots.txt at the origin root.",
            "fix": "Publish a robots.txt at the site root with your crawl rules and sitemap location."
        },
        {
            "id": "sitemap",
            "category": "technical",
            "label": "XML sitemap discoverable",
            "status": "warn",
            "points": 0,
            "maxPoints": 4,
            "details": "No sitemap found via robots.txt or /sitemap.xml.",
            "fix": "Generate an XML sitemap and reference it from robots.txt with a Sitemap: line."
        },
        {
            "id": "og_tags",
            "category": "social",
            "label": "Open Graph tags present",
            "status": "warn",
            "points": 0,
            "maxPoints": 6,
            "details": "No og: tags found.",
            "fix": "Add og:title, og:description, og:image and og:type so shared links render properly."
        },
        {
            "id": "twitter_card",
            "category": "social",
            "label": "Twitter card declared",
            "status": "warn",
            "points": 0,
            "maxPoints": 3,
            "details": "No twitter:card meta found.",
            "fix": "Add <meta name=\"twitter:card\" content=\"summary_large_image\">."
        },
        {
            "id": "jsonld_present",
            "category": "social",
            "label": "JSON-LD structured data present",
            "status": "warn",
            "points": 0,
            "maxPoints": 7,
            "details": "No JSON-LD structured data found.",
            "fix": "Add JSON-LD structured data (e.g. Article, Product, WebPage) describing the page entity."
        },
        {
            "id": "jsonld_valid",
            "category": "social",
            "label": "JSON-LD parses as valid JSON",
            "status": "warn",
            "points": 0,
            "maxPoints": 4,
            "details": "No JSON-LD to validate.",
            "fix": "Fix the JSON-LD syntax so search engines and AI systems can parse it."
        }
    ],
    "geo": {
        "score": 40,
        "aiCrawlerAccess": {
            "GPTBot": "allowed",
            "ClaudeBot": "allowed",
            "PerplexityBot": "allowed",
            "Google-Extended": "allowed",
            "CCBot": "allowed"
        },
        "llmsTxt": false,
        "checks": [
            {
                "id": "llms_txt",
                "label": "llms.txt present for AI systems",
                "status": "warn",
                "points": 0,
                "maxPoints": 25,
                "details": "No llms.txt at the origin root.",
                "fix": "Publish an llms.txt that summarises the site and links its key pages for AI systems."
            },
            {
                "id": "ai_crawlers",
                "label": "AI crawlers allowed in robots.txt",
                "status": "pass",
                "points": 30,
                "maxPoints": 30,
                "details": "GPTBot: allowed; ClaudeBot: allowed; PerplexityBot: allowed; Google-Extended: allowed; CCBot: allowed.",
                "fix": null
            },
            {
                "id": "geo_structured_data",
                "label": "Structured data available to AI/search parsers",
                "status": "fail",
                "points": 0,
                "maxPoints": 15,
                "details": "No JSON-LD found.",
                "fix": "Add valid JSON-LD describing the page entity so AI systems can cite it accurately."
            },
            {
                "id": "geo_metadata",
                "label": "Title and description complete for citation snippets",
                "status": "warn",
                "points": 5,
                "maxPoints": 10,
                "details": "Title: present; description: missing.",
                "fix": "Complete the title and meta description; AI answers quote them when citing pages."
            },
            {
                "id": "geo_server_rendered",
                "label": "Content readable without JavaScript (>= 300 words raw HTML)",
                "status": "fail",
                "points": 0,
                "maxPoints": 10,
                "details": "27 words in raw HTML."
            }
        ]
    },
    "_note": "Response truncated for documentation purposes"
}
Audit one page — CODE SNIPPETS

curl --location --request GET 'https://zylalabs.com/api/14801/seoscore+api/38378/audit+one+page?url=https://example.com' --header 'Authorization: Bearer YOUR_API_KEY' 


    
Request
JSON body {"urls": ["...", ...]}, up to 25 URLs; returns per-URL audit objects plus summary {total, succeeded, failed, averageScore, averageGeoScore}. Errors are named: MISSING_URLS, EMPTY_BATCH, BATCH_TOO_LARGE.
Endpoint ID: 38380
POST https://zylalabs.com/api/14801/seoscore+api/38380/batch+audit
INPUT PARAMETERS

Batch audit — Endpoint Features

Object Description
Request Body Required Json

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

API EXAMPLE RESPONSE
JSON
{
    "results": [
        {
            "url": "https://example.com/",
            "finalUrl": "https://example.com/",
            "ok": true,
            "score": 29,
            "maxScore": 100,
            "grade": "F",
            "geoScore": 40,
            "statusCode": 200,
            "responseTimeMs": 17,
            "pageBytes": 577,
            "truncated": false,
            "checks": [
                {
                    "id": "title_present",
                    "category": "meta",
                    "label": "Title tag present",
                    "status": "pass",
                    "points": 8,
                    "maxPoints": 8,
                    "details": "Title: \"Example Domain\"",
                    "fix": null
                },
                {
                    "id": "title_length",
                    "category": "meta",
                    "label": "Title length 30-60 chars",
                    "status": "warn",
                    "points": 0,
                    "maxPoints": 4,
                    "details": "Title is 14 characters.",
                    "fix": "Rewrite the title to 30-60 characters so it is not truncated in search results."
                },
                {
                    "id": "description_present",
                    "category": "meta",
                    "label": "Meta description present",
                    "status": "fail",
                    "points": 0,
                    "maxPoints": 8,
                    "details": "No meta description found.",
                    "fix": "Add a meta description of 70-160 characters summarising the page."
                },
                {
                    "id": "description_length",
                    "category": "meta",
                    "label": "Description length 70-160 chars",
                    "status": "fail",
                    "points": 0,
                    "maxPoints": 4,
                    "details": "No description to measure.",
                    "fix": "Adjust the meta description to 70-160 characters."
                },
                {
                    "id": "canonical_present",
                    "category": "meta",
                    "label": "Canonical URL declared",
                    "status": "warn",
                    "points": 0,
                    "maxPoints": 3,
                    "details": "No rel=canonical link found.",
                    "fix": "Add <link rel=\"canonical\"> pointing at the preferred URL for this page."
                },
                {
                    "id": "viewport_present",
                    "category": "meta",
                    "label": "Viewport meta present (mobile)",
                    "status": "warn",
                    "points": 0,
                    "maxPoints": 3,
                    "details": "No viewport meta found.",
                    "fix": "Add <meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">."
                },
                {
                    "id": "h1_single",
                    "category": "content",
                    "label": "Exactly one H1 heading",
                    "status": "fail",
                    "points": 0,
                    "maxPoints": 8,
                    "details": "No H1 found.",
                    "fix": "Use exactly one H1 that states the page's main topic."
                },
                {
                    "id": "h2_present",
                    "category": "content",
                    "label": "H2 subheadings present",
                    "status": "warn",
                    "points": 0,
                    "maxPoints": 4,
                    "details": "0 H2 heading(s) found.",
                    "fix": "Structure the page with H2 subheadings for each main section."
                },
                {
                    "id": "word_count",
                    "category": "content",
                    "label": "At least 300 words of visible text",
                    "status": "fail",
                    "points": 0,
                    "maxPoints": 6,
                    "details": "27 words of visible text.",
                    "fix": "Expand the page copy to at least 300 words of substantive, server-rendered text."
                },
                {
                    "id": "image_alt",
                    "category": "content",
                    "label": "Image alt text coverage >= 80%",
                    "status": "pass",
                    "points": 4,
                    "maxPoints": 4,
                    "details": "No <img> tags on the page.",
                    "fix": null
                },
                {
                    "id": "lang_present",
                    "category": "content",
                    "label": "html lang attribute present",
                    "status": "warn",
                    "points": 0,
                    "maxPoints": 3,
                    "details": "No lang attribute on <html>.",
                    "fix": "Add a lang attribute to the <html> tag, e.g. <html lang=\"en\">."
                },
                {
                    "id": "https",
                    "category": "technical",
                    "label": "Served over HTTPS",
                    "status": "pass",
                    "points": 6,
                    "maxPoints": 6,
                    "details": "Final URL: https://example.com/",
                    "fix": null
                },
                {
                    "id": "status_200",
                    "category": "technical",
                    "label": "HTTP status 200",
                    "status": "pass",
                    "points": 6,
                    "maxPoints": 6,
                    "details": "Status: 200",
                    "fix": null
                },
                {
                    "id": "indexable",
                    "category": "technical",
                    "label": "Page is indexable (no noindex)",
                    "status": "pass",
                    "points": 5,
                    "maxPoints": 5,
                    "details": "No noindex directive; Googlebot allowed.",
                    "fix": null
                },
                {
                    "id": "robots_txt",
                    "category": "technical",
                    "label": "robots.txt present",
                    "status": "warn",
                    "points": 0,
                    "maxPoints": 4,
                    "details": "No robots.txt at the origin root.",
                    "fix": "Publish a robots.txt at the site root with your crawl rules and sitemap location."
                },
                {
                    "id": "sitemap",
                    "category": "technical",
                    "label": "XML sitemap discoverable",
                    "status": "warn",
                    "points": 0,
                    "maxPoints": 4,
                    "details": "No sitemap found via robots.txt or /sitemap.xml.",
                    "fix": "Generate an XML sitemap and reference it from robots.txt with a Sitemap: line."
                },
                {
                    "id": "og_tags",
                    "category": "social",
                    "label": "Open Graph tags present",
                    "status": "warn",
                    "points": 0,
                    "maxPoints": 6,
                    "details": "No og: tags found.",
                    "fix": "Add og:title, og:description, og:image and og:type so shared links render properly."
                },
                {
                    "id": "twitter_card",
                    "category": "social",
                    "label": "Twitter card declared",
                    "status": "warn",
                    "points": 0,
                    "maxPoints": 3,
                    "details": "No twitter:card meta found.",
                    "fix": "Add <meta name=\"twitter:card\" content=\"summary_large_image\">."
                },
                {
                    "id": "jsonld_present",
                    "category": "social",
                    "label": "JSON-LD structured data present",
                    "status": "warn",
                    "points": 0,
                    "maxPoints": 7,
                    "details": "No JSON-LD structured data found.",
                    "fix": "Add JSON-LD structured data (e.g. Article, Product, WebPage) describing the page entity."
                },
                {
                    "id": "jsonld_valid",
                    "category": "social",
                    "label": "JSON-LD parses as valid JSON",
                    "status": "warn",
                    "points": 0,
                    "maxPoints": 4,
                    "details": "No JSON-LD to validate.",
                    "fix": "Fix the JSON-LD syntax so search engines and AI systems can parse it."
                }
            ],
            "geo": {
                "score": 40,
                "aiCrawlerAccess": {
                    "GPTBot": "allowed",
                    "ClaudeBot": "allowed",
                    "PerplexityBot": "allowed",
                    "Google-Extended": "allowed",
                    "CCBot": "allowed"
                },
                "llmsTxt": false,
                "checks": [
                    {
                        "id": "llms_txt"
                    }
                ]
            }
        }
    ],
    "_note": "Response truncated for documentation purposes"
}
Batch audit — CODE SNIPPETS

curl --location --request POST 'https://zylalabs.com/api/14801/seoscore+api/38380/batch+audit' --header 'Authorization: Bearer YOUR_API_KEY' 

--data-raw '{"urls": ["https://example.com/", "https://www.iana.org/"]}'

    

API Access Key & Authentication

After signing up, every developer is assigned a personal API access key, a unique combination of letters and digits provided to access to our API endpoint. To authenticate with the SEOScore API simply include your bearer token in the Authorization header.

Headers
Header Description
Authorization Required Should be Bearer access_key. See "Your API Access Key" above when you are subscribed.

No long-term commitment. Upgrade, downgrade, or cancel anytime.

Starts at
$10,000/Year


  • Custom Volume
  • Custom Rate Limit
  • Specialized Customer Support
  • Real-Time API Monitoring

Overview

SEO audit API with a deterministic 0-100 score, per-check evidence, a ready fix list, and a GEO score for AI-search visibility.

SEOScore API FAQs

Because the score is pure rules over the fetched HTML, status and headers. Timing is excluded on purpose. If a score changes, the page (or its robots.txt / llms.txt) changed.

No to both. It audits the raw HTML exactly as most crawlers first see it, and the report covers on-page and technical signals only — no invented backlink, ranking or lab metrics.

Up to 25. Each batch call returns per-URL results and the summary in a single response; larger lists should be split across calls.

How visible the page is to AI search: whether llms.txt exists, whether GPTBot, ClaudeBot, PerplexityBot, Google-Extended and CCBot are allowed by robots.txt, whether valid JSON-LD structured data is present, whether the title and description are complete enough to be quoted in an AI answer, whether the content is readable without JavaScript, and whether a canonical URL is served over HTTPS.

No. Private, loopback and link-local addresses are refused. The audit covers public pages only, and reads at most 512 KB of the page.

General FAQs

To obtain your API key, first sign in to your account and navigate to the API you want to use. From the API's Pricing section, choose a plan and complete the subscription process. Once subscribed, return to the API page and you will see your API Access Key displayed at the top of the documentation page. You can use this key to authenticate your requests.

You can’t switch APIs during the free trial. If you subscribe to a different API, your trial will end and the new subscription will start as a paid plan.

The free trial lasts for 7 days and allows you to make up to 50 API requests.

No, the free trial is available only once, so we recommend using it on the API that interests you the most. Most of our APIs offer a free trial, but some may not include this option.

Yes. If the API offers a free trial, you will see a "Free 7-Day Trial" option in its Pricing section. The trial lasts for 7 days and allows up to 50 API requests, enabling you to evaluate the API before subscribing to a paid plan.

Zyla API Hub is like a big store for APIs, where you can find thousands of them all in one place. We also offer dedicated support and real-time monitoring of all APIs. Once you sign up, you can pick and choose which APIs you want to use. Just remember, each API needs its own subscription. But if you subscribe to multiple ones, you'll use the same key for all of them, making things easier for you.

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The local currency shown on the pricing page is based on the country of your IP address and is provided for reference only. The actual prices are in USD (United States Dollar). When you make a payment, the charge will appear on your card statement in USD, even if you see the equivalent amount in your local currency on our website. This means you cannot pay directly with your local currency.
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Prices are determined by a recurring monthly or yearly subscription, depending on the chosen plan.
API calls are deducted from your plan based on successful requests. Each plan comes with a specific number of calls that you can make per month. Only successful calls, indicated by a Status 200 response, will be counted against your total. This ensures that failed or incomplete requests do not impact your monthly quota.
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To upgrade your current subscription plan, simply go to the pricing page of the API and select the plan you want to upgrade to. The upgrade will be instant, allowing you to immediately enjoy the features of the new plan. Please note that any remaining calls from your previous plan will not be carried over to the new plan, so be aware of this when upgrading. You will be charged the full amount of the new plan.
To check how many API calls you have left for the current month, refer to the 'X-Zyla-API-Calls-Monthly-Remaining' field in the response header. For example, if your plan allows 1,000 requests per month and you've used 100, this field in the response header will indicate 900 remaining calls.

You can monitor your API usage through the response headers included with every request:

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