Open Graph Twitter Card Validator API

API ID 14327

One GET, one graded JSON report a headless Open Graph and Twitter Card validator for CI gates, SEO audits and publishing tools. Give it a page URL or HTML and get a JSON report on the page s

API Documentation

Endpoints

Request
GETs the page up to 5 redirects, first 1 MB and, unless probe 0, requests the og image once. Cached 6 hours pass fresh 1 to bypass. A scheme-less value such as example.com is treated as https.
Endpoint ID: 35914
GET https://zylalabs.com/api/14327/open+graph+twitter+card+validator+api/35914/validate+the+open+graph+and+twitter+card+tags+of+a+url
INPUT PARAMETERS

Validate the Open Graph and Twitter Card tags of a URL — Endpoint Features

Object Description
probe Optional Set to 0 to skip the og image request.
fresh Optional Set to 1 to bypass the result cache.

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

probe
fresh
API EXAMPLE RESPONSE
JSON
{
    "url": "https://github.com/",
    "finalUrl": "https://github.com/",
    "statusCode": 200,
    "cached": true,
    "checkedAt": "2026-10-18T13:53:53.789Z",
    "note": "Only meta tags present in the served HTML are read (no JavaScript rendering). Platforms cache link previews on their side; this report does not refresh them.",
    "found": true,
    "grade": "A+",
    "score": 99,
    "summary": {
        "errors": 0,
        "warnings": 0,
        "infos": 1
    },
    "preview": {
        "title": "GitHub · Change is constant. GitHub keeps you ahead. · GitHub",
        "description": "Join the world's most widely adopted, AI-powered developer platform where millions of developers, businesses, and the largest open source community build software that advances humanity.",
        "image": "https://images.ctfassets.net/8aevphvgewt8/4pe4eOtUJ0ARpZRE4fNekf/f52b1f9c52f059a33170229883731ed0/GH-Homepage-Universe-img.png",
        "url": "https://github.com/",
        "siteName": "GitHub",
        "type": "object",
        "twitterCard": "summary_large_image",
        "locale": "en"
    },
    "tags": {
        "openGraph": {
            "og:image": "https://images.ctfassets.net/8aevphvgewt8/4pe4eOtUJ0ARpZRE4fNekf/f52b1f9c52f059a33170229883731ed0/GH-Homepage-Universe-img.png",
            "og:image:alt": "Join the world's most widely adopted, AI-powered developer platform where millions of developers, businesses, and the largest open source community build software that advances humanity.",
            "og:site_name": "GitHub",
            "og:type": "object",
            "og:title": "GitHub · Change is constant. GitHub keeps you ahead. · GitHub",
            "og:url": "https://github.com/",
            "og:description": "Join the world's most widely adopted, AI-powered developer platform where millions of developers, businesses, and the largest open source community build software that advances humanity."
        },
        "twitter": {
            "twitter:image": "https://images.ctfassets.net/8aevphvgewt8/4pe4eOtUJ0ARpZRE4fNekf/f52b1f9c52f059a33170229883731ed0/GH-Homepage-Universe-img.png",
            "twitter:site": "@github",
            "twitter:card": "summary_large_image",
            "twitter:title": "GitHub · Change is constant. GitHub keeps you ahead. · GitHub",
            "twitter:description": "Join the world's most widely adopted, AI-powered developer platform where millions of developers, businesses, and the largest open source community build software that advances humanity."
        },
        "article": [],
        "canonical": "https://github.com/",
        "title": "GitHub · Change is constant. GitHub keeps you ahead. · GitHub · GitHub"
    },
    "imageCheck": {
        "url": "https://images.ctfassets.net/8aevphvgewt8/4pe4eOtUJ0ARpZRE4fNekf/f52b1f9c52f059a33170229883731ed0/GH-Homepage-Universe-img.png",
        "status": 206,
        "contentType": "image/png",
        "sizeBytes": 618778,
        "error": null
    },
    "issues": [
        {
            "severity": "info",
            "code": "og_image_size_missing",
            "message": "og:image:width / og:image:height are not set; scrapers must download the image first, so the first share can render without it."
        }
    ]
}
Validate the Open Graph and Twitter Card tags of a URL — CODE SNIPPETS

curl --location --request GET 'https://zylalabs.com/api/14327/open+graph+twitter+card+validator+api/35914/validate+the+open+graph+and+twitter+card+tags+of+a+url' --header 'Authorization: Bearer YOUR_API_KEY' 


    
Request
Offline validation, no outbound request. Send the page HTML in html url is optional and only resolves relative URLs. The body is limited to 512 KB.
Endpoint ID: 35915
POST https://zylalabs.com/api/14327/open+graph+twitter+card+validator+api/35915/validate+html+you+send+in
INPUT PARAMETERS

Validate HTML you send in — Endpoint Features

Object Description
Request Body Required Json

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

API EXAMPLE RESPONSE
JSON
{
    "found": true,
    "grade": "F",
    "score": 56,
    "summary": {
        "errors": 0,
        "warnings": 4,
        "infos": 4
    },
    "preview": {
        "title": "Hi",
        "description": null,
        "image": "https://example.com/a.png",
        "url": "https://example.com/page",
        "siteName": null,
        "type": null,
        "twitterCard": null,
        "locale": null
    },
    "tags": {
        "openGraph": {
            "og:title": "Hi",
            "og:image": "https://example.com/a.png"
        },
        "twitter": [],
        "article": [],
        "canonical": null,
        "title": "Hi"
    },
    "assumptions": {
        "url": "https://example.com/page",
        "note": "Validated offline: the og:image file is not requested."
    },
    "issues": [
        {
            "severity": "warning",
            "code": "og_type_missing",
            "message": "No <meta property=\"og:type\"> (usually \"website\" or \"article\"). The Open Graph protocol lists it as required."
        },
        {
            "severity": "warning",
            "code": "og_url_missing",
            "message": "No <meta property=\"og:url\">. Platforms then guess the canonical address of the page."
        },
        {
            "severity": "warning",
            "code": "og_description_missing",
            "message": "No <meta property=\"og:description\">; link cards show no description text or a random page snippet."
        },
        {
            "severity": "info",
            "code": "og_site_name_missing",
            "message": "No og:site_name; some platforms show it above the title."
        },
        {
            "severity": "info",
            "code": "og_image_size_missing",
            "message": "og:image:width / og:image:height are not set; scrapers must download the image first, so the first share can render without it."
        },
        {
            "severity": "info",
            "code": "image_alt_missing",
            "message": "No og:image:alt or twitter:image:alt text for the preview image."
        },
        {
            "severity": "warning",
            "code": "twitter_card_missing",
            "message": "No <meta name=\"twitter:card\">. X may not render a card without it, even if Open Graph tags exist."
        },
        {
            "severity": "info",
            "code": "meta_description_missing",
            "message": "No <meta name=\"description\">; used by search engines and as a fallback on some platforms."
        }
    ],
    "checkedAt": "2026-10-18T14:01:58.682Z"
}
Validate HTML you send in — CODE SNIPPETS

curl --location --request POST 'https://zylalabs.com/api/14327/open+graph+twitter+card+validator+api/35915/validate+html+you+send+in' --header 'Authorization: Bearer YOUR_API_KEY' 

--data-raw '{"html":"Hi","url":"https://example.com/page"}'

    

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 Open Graph Twitter Card Validator 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. Free Trial includes up to 50 requests.

Starts at
$10,000/Year


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

Overview

One GET, one graded JSON report a headless Open Graph and Twitter Card validator for CI gates, SEO audits and publishing tools. Give it a page URL or HTML and get a JSON report on the page s social-sharing tags required and recommended Open Graph properties, Twitter X card type and image, title and description lengths, og url versus canonical mismatches, and - by default - one small ranged request to the image falling back to twitter image if there is no og image to check that it responds, reports an image content type and a size within platform limits. Includes a best-guess preview object Open Graph first, then Twitter, then the page s own tags each platform picks its own fields and this does not reproduce what a platform crawler sees. This is a validator, not a link-preview scraper. Not affiliated with Meta, Facebook, X or LinkedIn. v1 check GETs the page up to 5 redirects, first 1 MB

Open Graph Twitter Card Validator API FAQs

Required and recommended Open Graph and Twitter Card tags, value lengths, canonical mismatch and whether the og image is reachable. It returns a grade, a score and coded issues.

Yes. The validate endpoint accepts HTML in the request body and checks it offline without any outbound request, except an optional image check.

Yes. A bare domain such as example.com is treated as https. Parameter aliases such as u, link, target and site are accepted as well.

Set the probe parameter to 0. The image is then not requested and only the tags are checked.

Gate on the errors count in the summary. A single error lowers the score to 75, so the letter grade alone is not a reliable pass or fail signal.

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