Web Validator by DigestSEO
REMOTE · WEB-VALIDATOR-MCP.DIGESTSEO.COM · 2 COMPONENTS
Audit public webpages and supplied markup for HTML, CSS, SEO, JSON-LD, and link issues.
Available components
Last scanned (2 hours ago)
Scores higher than 66% of remote servers
Reachable. Last reached 5 Nov 2026.
Category Testing and QA
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security63
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one. See how to fix → View diagnostics → Partial
- HTTPS enforcement could not be verified: the plaintext port answered with HTTP 406, which proves neither a plaintext path nor enforcement. View diagnostics → Unverified
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability51
- 0% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Fail
- AI-judged instruction clarity (excellent).Pass
- Tool/resource definitions use about 975 tokens (~108/item across 9 items; 8 tools + 1 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management100
- No destabilizing schema changes in the last 30 days.Pass
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 8 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 10 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
- Supports UI / widget rendering.Pass
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 29 Sept 26 0
- Stability: 0.97 → pass security
- 28 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 25 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 31 Aug 26 0
- Stability: unverified → 0.03 ▲ functional
- 30 Aug 26 0
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 5 Nov 2026 · Probed https://web-validator-mcp.digestseo.com/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=digestseo.com | CN=WE1,O=Google Trust Services,C=US | 7 Sept 2026 | 6 Dec 2026 | ECDSA 256 | ECDSA-SHA256 | 6cef4f5a53d9f40e13bd9c9d124698b0 |
| SANs: digestseo.com, web-validator-mcp.digestseo.com, *.web-validator-mcp.digestseo.com | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of web-validator-mcp.digestseo.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| digestseo.com. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://web-validator-mcp.digestseo.com/mcp | Verified | 200 | |
| http (plaintext) | http://web-validator-mcp.digestseo.com/mcp | Inconclusive | 406 |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
audit_public_site Audit public site ~159
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.
| Name | Type | Req | Description |
|---|---|---|---|
| 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. |
| site_url | string | yes | Authorized public website URL. The final public origin becomes the crawl boundary. |
| Name | Type | Req | Description |
|---|---|---|---|
| audit_health_score | integer | – | – |
| discovery | string | yes | – |
| discovery_error | string | – | – |
| error | string | – | – |
| issue_groups | array | yes | – |
| issue_groups_truncated | boolean | yes | – |
| next_page_offset | integer | – | – |
| overview | object | yes | – |
| pages | array | yes | – |
| pages_audited | integer | yes | – |
| pages_discovered | integer | yes | – |
| pages_failed | integer | yes | – |
| pages_partial | integer | yes | – |
| pages_selected | integer | yes | – |
| pages_skipped_robots | integer | yes | – |
| score_coverage_percent | integer | yes | – |
| site_url | string | yes | – |
| sitemap_url | string | – | – |
| truncated | boolean | yes | – |
No examples provided.
audit_public_webpage Audit public webpage ~147
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.
| Name | Type | Req | Description |
|---|---|---|---|
| check_links | boolean | – | Whether to contact eligible public links found on the fetched page. |
| max_links | integer | – | Maximum links to check, from 1 to 20. |
| url | string | yes | One authorized public HTTP(S) webpage URL; private pages, credentials, and custom ports are rejected. |
| Name | Type | Req | Description |
|---|---|---|---|
| broken_links | integer | yes | – |
| content_type | string | – | – |
| css_checked | boolean | yes | – |
| css_errors | integer | yes | – |
| css_messages | array | yes | – |
| error | string | – | – |
| failed_checks | array | yes | – |
| fetched_url | string | – | – |
| healthy_links | integer | yes | – |
| html_errors | integer | yes | – |
| html_info | integer | yes | – |
| html_messages | array | yes | – |
| html_total_messages | integer | yes | – |
| html_truncated | boolean | yes | – |
| html_warnings | integer | yes | – |
| http_status | integer | – | – |
| links | array | yes | – |
| links_checked | integer | yes | – |
| links_requested | boolean | yes | – |
| overview | object | yes | – |
| page_fetched | boolean | yes | – |
| redirects | integer | yes | – |
| redirects_followed | integer | – | – |
| requested_url | string | – | – |
| schema_blocks_checked | integer | yes | – |
| schema_findings | array | yes | – |
| schema_issues | integer | yes | – |
| schema_truncated | boolean | yes | – |
| seo_findings | array | yes | – |
| seo_issues | integer | yes | – |
| seo_truncated | boolean | yes | – |
| unreachable_links | integer | yes | – |
No examples provided.
audit_seo_metadata Audit SEO metadata ~63
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.
| Name | Type | Req | Description |
|---|---|---|---|
| html | string | yes | Raw HTML markup supplied by the user; this is not a webpage URL. |
| Name | Type | Req | Description |
|---|---|---|---|
| error | string | – | – |
| issues | array | yes | – |
| overview | object | yes | – |
| total_issues | integer | yes | – |
| truncated | boolean | yes | – |
No examples provided.
check_broken_links Check public links ~105
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.
| Name | Type | Req | Description |
|---|---|---|---|
| base_url | string | – | Only resolves relative links; it does not fetch this webpage. |
| html | string | yes | Raw HTML markup supplied by the user; this is not a webpage URL. |
| max_links | integer | – | Maximum links to check, from 1 to 20. |
| Name | Type | Req | Description |
|---|---|---|---|
| error | string | – | – |
| healthy_links | integer | yes | – |
| links | array | yes | – |
| links_checked | integer | yes | – |
| overview | object | yes | – |
| redirects | integer | yes | – |
| unreachable_links | integer | yes | – |
No examples provided.
generate_validation_report Generate validation report ~161
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.
| Name | Type | Req | Description |
|---|---|---|---|
| base_url | string | – | Only resolves relative links when check_links is true; it does not fetch this webpage. |
| check_links | boolean | – | Whether to contact eligible public links found in the supplied HTML. |
| css | string | – | Optional raw CSS source. Linked stylesheets are not fetched. |
| html | string | yes | Raw HTML markup supplied by the user; this is not a webpage URL. |
| max_links | integer | – | Maximum links to check, from 1 to 20. |
| Name | Type | Req | Description |
|---|---|---|---|
| broken_links | integer | yes | – |
| css_checked | boolean | yes | – |
| css_errors | integer | yes | – |
| css_messages | array | yes | – |
| error | string | – | – |
| failed_checks | array | yes | – |
| healthy_links | integer | yes | – |
| html_errors | integer | yes | – |
| html_info | integer | yes | – |
| html_messages | array | yes | – |
| html_total_messages | integer | yes | – |
| html_truncated | boolean | yes | – |
| html_warnings | integer | yes | – |
| links | array | yes | – |
| links_checked | integer | yes | – |
| links_requested | boolean | yes | – |
| overview | object | yes | – |
| redirects | integer | yes | – |
| schema_blocks_checked | integer | yes | – |
| schema_findings | array | yes | – |
| schema_issues | integer | yes | – |
| schema_truncated | boolean | yes | – |
| seo_findings | array | yes | – |
| seo_issues | integer | yes | – |
| seo_truncated | boolean | yes | – |
| unreachable_links | integer | yes | – |
No examples provided.
validate_css Validate CSS ~46
Use this when raw CSS source is supplied. Parses it inside the Worker and returns syntax messages without contacting an external service.
| Name | Type | Req | Description |
|---|---|---|---|
| css | string | yes | Raw CSS source supplied by the user. |
| Name | Type | Req | Description |
|---|---|---|---|
| error | string | – | – |
| errors | array | yes | – |
| overview | object | yes | – |
No examples provided.
validate_html Validate HTML ~66
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.
| Name | Type | Req | Description |
|---|---|---|---|
| html | string | yes | Raw HTML markup supplied by the user; this is not a webpage URL. |
| Name | Type | Req | Description |
|---|---|---|---|
| error | string | – | – |
| messages | array | yes | – |
| overview | object | yes | – |
| total_messages | integer | yes | – |
| truncated | boolean | yes | – |
No examples provided.
validate_schema_markup Validate JSON-LD syntax ~57
Use this for a focused JSON-LD syntax check of supplied HTML. It parses JSON only and does not validate Schema.org vocabulary semantics.
| Name | Type | Req | Description |
|---|---|---|---|
| html | string | yes | Raw HTML markup supplied by the user; this is not a webpage URL. |
| Name | Type | Req | Description |
|---|---|---|---|
| blocks_checked | integer | yes | – |
| error | string | – | – |
| issues | array | yes | – |
| overview | object | yes | – |
| total_issues | integer | yes | – |
| truncated | boolean | yes | – |
No examples provided.
How do I install the Web Validator by DigestSEO MCP server?
Web Validator by DigestSEO is a hosted endpoint at https://web-validator-mcp.digestseo.com/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · web-validator-mcp.digestseo.com
claude mcp add --transport http akzar1el-mcp-web-validator 'https://web-validator-mcp.digestseo.com/mcp'
What is the Web Validator by DigestSEO MCP server?
Web Validator by DigestSEO is an MCP server listed in the public MCP registry as io.github.AKzar1el/mcp-web-validator. Audit public webpages and supplied markup for HTML, CSS, SEO, JSON-LD, and link issues. This page covers its hosted endpoint (https://web-validator-mcp.digestseo.com/mcp).
Is the Web Validator by DigestSEO MCP server safe to use?
Web Validator by DigestSEO scores 76 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the Web Validator by DigestSEO MCP server expose?
Web Validator by DigestSEO exposes 8 tools: validate_html, validate_css, audit_seo_metadata, validate_schema_markup, check_broken_links, and 3 more. Their descriptions and schemas cost roughly 804 tokens of context every time the server is loaded.
Does the Web Validator by DigestSEO MCP server require authentication?
No. We connected to Web Validator by DigestSEO without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the Web Validator by DigestSEO MCP server still maintained?
Web Validator by DigestSEO is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.