Web Validator by DigestSEO

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io.github.AKzar1el/mcp-web-validatorv1.3.43

Audit public webpages and supplied markup for HTML, CSS, SEO, JSON-LD, and link issues.

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audit_public_site Read-only

Use this for a bounded, sitemap-first audit of a public website the user owns or is authorized to inspect. It fetches at most 8 same-origin HTML pages per call, respects robots.txt, and returns compact page summaries plus deduplicated findings. It does not recursively follow HTML links, authenticate, execute JavaScript, fetch assets, or run site-wide link checks. Use page_offset to continue when more sitemap pages remain.

site_urlstring, required

Authorized public website URL. The final public origin becomes the crawl boundary.

max_pagesinteger

Maximum same-origin pages to audit in this call, from 1 to 8.

page_offsetinteger

Zero-based sitemap-page offset for continuing a capped audit batch.

Tools (8)

audit_public_site

read-only

Argument	Type	Description
site_url*	string	Authorized public website URL. The final public origin becomes the crawl boundary.
max_pages	integer	Maximum same-origin pages to audit in this call, from 1 to 8.
page_offset	integer	Zero-based sitemap-page offset for continuing a capped audit batch.

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "site_url"
  ],
  "properties": {
    "site_url": {
      "type": "string",
      "format": "uri",
      "maxLength": 2048,
      "description": "Authorized public website URL. The final public origin becomes the crawl boundary."
    },
    "max_pages": {
      "type": "integer",
      "default": 5,
      "maximum": 8,
      "minimum": 1,
      "description": "Maximum same-origin pages to audit in this call, from 1 to 8."
    },
    "page_offset": {
      "type": "integer",
      "default": 0,
      "maximum": 250,
      "minimum": 0,
      "description": "Zero-based sitemap-page offset for continuing a capped audit batch."
    }
  }
}

audit_public_webpage

Use this when the user provides one live public webpage URL. Fetches one bounded static HTML response, then runs HTML validation, SEO/accessibility-signal, and JSON-LD syntax checks. It checks links only when requested and does not crawl, execute JavaScript, authenticate, or fetch linked stylesheets. Use only URLs the user owns or is authorized to inspect.

read-only

Argument	Type	Description
url*	string	One authorized public HTTP(S) webpage URL; private pages, credentials, and custom ports are rejected.
max_links	integer	Maximum links to check, from 1 to 20.
check_links	boolean	Whether to contact eligible public links found on the fetched page.

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "url"
  ],
  "properties": {
    "url": {
      "type": "string",
      "format": "uri",
      "maxLength": 2048,
      "description": "One authorized public HTTP(S) webpage URL; private pages, credentials, and custom ports are rejected."
    },
    "max_links": {
      "type": "integer",
      "default": 15,
      "maximum": 20,
      "minimum": 1,
      "description": "Maximum links to check, from 1 to 20."
    },
    "check_links": {
      "type": "boolean",
      "default": false,
      "description": "Whether to contact eligible public links found on the fetched page."
    }
  }
}

audit_seo_metadata

Use this for a focused SEO/accessibility-signal check of supplied HTML. It does not fetch a live webpage; use audit_public_webpage for a URL.

read-only

Argument	Type	Description
html*	string	Raw HTML markup supplied by the user; this is not a webpage URL.

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "html"
  ],
  "properties": {
    "html": {
      "type": "string",
      "maxLength": 200000,
      "minLength": 1,
      "description": "Raw HTML markup supplied by the user; this is not a webpage URL."
    }
  }
}

check_broken_links

Use this for a focused check of up to 20 public HTTP(S) links found in supplied HTML. It does not fetch base_url, follow redirects, or retain response bodies.

read-only

Argument	Type	Description
html*	string	Raw HTML markup supplied by the user; this is not a webpage URL.
base_url	string	Only resolves relative links; it does not fetch this webpage.
max_links	integer	Maximum links to check, from 1 to 20.

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "html"
  ],
  "properties": {
    "html": {
      "type": "string",
      "maxLength": 200000,
      "minLength": 1,
      "description": "Raw HTML markup supplied by the user; this is not a webpage URL."
    },
    "base_url": {
      "type": "string",
      "format": "uri",
      "description": "Only resolves relative links; it does not fetch this webpage."
    },
    "max_links": {
      "type": "integer",
      "default": 15,
      "maximum": 20,
      "minimum": 1,
      "description": "Maximum links to check, from 1 to 20."
    }
  }
}

generate_validation_report

Use this when HTML markup is already supplied. Combines Nu HTML validation with local CSS, SEO, accessibility-signal, and JSON-LD syntax checks. It does not fetch a webpage from base_url; use audit_public_webpage for a live URL.

read-only

Argument	Type	Description
css	string	Optional raw CSS source. Linked stylesheets are not fetched.
html*	string	Raw HTML markup supplied by the user; this is not a webpage URL.
base_url	string	Only resolves relative links when check_links is true; it does not fetch this webpage.
max_links	integer	Maximum links to check, from 1 to 20.
check_links	boolean	Whether to contact eligible public links found in the supplied HTML.

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "html"
  ],
  "properties": {
    "css": {
      "type": "string",
      "maxLength": 200000,
      "description": "Optional raw CSS source. Linked stylesheets are not fetched."
    },
    "html": {
      "type": "string",
      "maxLength": 200000,
      "minLength": 1,
      "description": "Raw HTML markup supplied by the user; this is not a webpage URL."
    },
    "base_url": {
      "type": "string",
      "format": "uri",
      "description": "Only resolves relative links when check_links is true; it does not fetch this webpage."
    },
    "max_links": {
      "type": "integer",
      "default": 15,
      "maximum": 20,
      "minimum": 1,
      "description": "Maximum links to check, from 1 to 20."
    },
    "check_links": {
      "type": "boolean",
      "default": false,
      "description": "Whether to contact eligible public links found in the supplied HTML."
    }
  }
}

validate_css

Use this when raw CSS source is supplied. Parses it inside the Worker and returns syntax messages without contacting an external service.

read-only

Argument	Type	Description
css*	string	Raw CSS source supplied by the user.

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "css"
  ],
  "properties": {
    "css": {
      "type": "string",
      "maxLength": 200000,
      "minLength": 1,
      "description": "Raw CSS source supplied by the user."
    }
  }
}

validate_html

Use this when raw HTML markup is supplied. Sends that markup to the Nu HTML Checker hosted at validator.nu and returns validation messages. For a live URL, use audit_public_webpage.

read-only

Argument	Type	Description
html*	string	Raw HTML markup supplied by the user; this is not a webpage URL.

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "html"
  ],
  "properties": {
    "html": {
      "type": "string",
      "maxLength": 200000,
      "minLength": 1,
      "description": "Raw HTML markup supplied by the user; this is not a webpage URL."
    }
  }
}

validate_schema_markup

Use this for a focused JSON-LD syntax check of supplied HTML. It parses JSON only and does not validate Schema.org vocabulary semantics.

read-only

Argument	Type	Description
html*	string	Raw HTML markup supplied by the user; this is not a webpage URL.

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "html"
  ],
  "properties": {
    "html": {
      "type": "string",
      "maxLength": 200000,
      "minLength": 1,
      "description": "Raw HTML markup supplied by the user; this is not a webpage URL."
    }
  }
}