Web Validator by DigestSEO
NPM · MCP-WEB-VALIDATOR · 2 COMPONENTS
Audit public webpages and supplied markup for HTML, CSS, SEO, JSON-LD, and link issues.
Available components
Last scanned (23 hours ago)
Scores higher than 99% of npm servers
Category Testing and QA
How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. How we score → Why this is hard to score →
Supply Chain Security99
- No malware found by supply-chain analysis.Pass
- No known CVEs affecting this package version or its production dependencies.Pass
- No install/post-install scripts declared.Pass
- 36 of 141 dependencies flagged as unhealthy (1 deprecated). View diagnostics → Partial
Provenance & Transparency100
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Cryptographically verified build provenance (signed, bound to AKzar1el/mcp-web-validator). View diagnostics → Pass
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 7 days ago).Pass
- Publishes a security disclosure policy (SECURITY.md).Pass
Schema Quality & AI Usability81
- AI-judged instruction clarity (excellent).Pass
- Tool/resource definitions use about 698 tokens (~87/item across 8 items; 8 tools + 0 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 9 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
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.
- 31 Oct 26 0
- Stability: 0.97 → pass security
- 30 Oct 26 0
- Stability: pass → 0.97 functional
- 28 Oct 26 +15
- Malware scan: unverified → pass ▲ security
- 27 Oct 26 −15
- Malware scan: pass → unverified ▼ security
- Package version: 1.3.46 → 1.3.47 functional
- 25 Oct 26 +15
- Stability: pass → unverified ▼ security
- Tool safety: pass → unverified ▼ security
- Malware scan: unverified → pass ▲ security
- Capabilities: pass → unverified ▼ functional
- Tool coverage: 100 → unverified ▼ functional
- First check of Schema quality: unverified functional
- Package version: 1.3.43 → 1.3.46 functional
- Package version: 1.3.43 → 1.3.45 functional
- Package version: 1.3.43 → 1.3.44 functional
- 24 Oct 26 −15
- CVE-2023-54404 affects this package: high ▼ security
- Malware scan: pass → unverified ▼ security
- Known CVEs: pass → fail ▼ security
- Package version: 1.3.42 → 1.3.43 functional
- 20 Oct 26 0
- Stability: 0.97 → pass security
- 19 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 93 to 97. That category is still filling its 30-day observation window: 28 days of observed history at the previous scan, 29 at this one. The score rises as the window fills, whether or not the server changes.
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 4 Nov 2026 · Analysed npm/mcp-web-validator@1.3.47
Provenance Verified
A signed build attestation was found and verified, binding this exact artifact to the source repository it claims to come from.
| Result | Verified |
|---|---|
| Ecosystem | npm |
| Reason | Verified |
| Discovered via | Registry attestation endpoint |
| Source repo | AKzar1el/mcp-web-validator |
| Certificate issuer | https://token.actions.githubusercontent.com |
| Certificate SAN | https://github.com/AKzar1el/mcp-web-validator/.github/workflows/publish-npm.yml@refs/tags/v1.3.47 |
| Rekor log index | 3515358066 |
| Predicate type | SLSA build provenance https://slsa.dev/provenance/v1 |
| Subject digest | sha512:2c6286a7d5486392041471b5e2ce988b76b140d2dc8863d110caef2437427c90df7ce6e16a428c7ccd22ad564a196e955f802ef1097d97772f8d70d85 |
Background: How many MCP packages publish verified provenance →
Dependencies 141 packages
| Packages resolved | 141 |
|---|---|
| Deprecated | 1 |
| Stale | 36 |
| Tree resolution | Complete |
Background: SBOMs and build attestations, explained →
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 →
css.local Validate local CSS ~54
Reads a bounded local CSS file and sends it to the W3C Jigsaw CSS Validator. Use only files the user is authorized to share.
| Name | Type | Req | Description |
|---|---|---|---|
| filePath | string | yes | Absolute or workspace-relative path to a CSS file. |
| Name | Type | Req | Description |
|---|---|---|---|
| error | string | – | – |
| errors | array | yes | – |
| totalMessages | integer | yes | – |
| truncated | boolean | yes | – |
| warnings | array | – | – |
No examples provided.
html.local Validate local HTML ~73
Reads a bounded local HTML or .xhtml file and sends its markup to the W3C Nu HTML Checker. .xhtml files use application/xhtml+xml parsing semantics. Use only files the user is authorized to share.
| Name | Type | Req | Description |
|---|---|---|---|
| filePath | string | yes | Absolute or workspace-relative path to an HTML or .xhtml file. |
| Name | Type | Req | Description |
|---|---|---|---|
| error | string | – | – |
| errors | array | yes | – |
| totalMessages | integer | yes | – |
| truncated | boolean | yes | – |
No examples provided.
html.url Validate a public URL ~65
Fetches a bounded public HTTP(S) page, then sends its markup to the W3C Nu HTML Checker. Private, reserved, credentialed, and nonstandard-port destinations are rejected.
| Name | Type | Req | Description |
|---|---|---|---|
| url | string | yes | Public HTTP(S) URL on port 80 or 443. |
| Name | Type | Req | Description |
|---|---|---|---|
| error | string | – | – |
| errors | array | yes | – |
| fetchedUrl | string | – | – |
| totalMessages | integer | yes | – |
| truncated | boolean | yes | – |
No examples provided.
links.broken Check public links ~100
Resolves and checks up to 25 public HTTP(S) links in supplied HTML. Redirects are reported but not followed, and response bodies are discarded.
| Name | Type | Req | Description |
|---|---|---|---|
| baseUrl | string | – | Optional public HTTP(S) base URL used to resolve relative links. |
| htmlContent | string | yes | Raw HTML markup containing links to check. |
| maxLinks | integer | – | Maximum number of public HTTP(S) links to check, from 1 to 25. |
| Name | Type | Req | Description |
|---|---|---|---|
| error | string | – | – |
| links | array | yes | – |
No examples provided.
report.validation Generate a validation report ~100
Combines W3C HTML/CSS validation, local SEO/accessibility checks, JSON-LD syntax checks, and a bounded public-link check into a Markdown and structured report.
| Name | Type | Req | Description |
|---|---|---|---|
| baseUrl | string | – | Optional public HTTP(S) base URL used to resolve relative links. |
| cssFilePath | string | – | Optional absolute or workspace-relative CSS file path. |
| htmlFilePath | string | yes | Absolute or workspace-relative HTML or .xhtml file path. |
| Name | Type | Req | Description |
|---|---|---|---|
| cssMessages | array | yes | – |
| cssTotalMessages | integer | yes | – |
| cssTruncated | boolean | yes | – |
| errors | array | – | – |
| failedChecks | array | yes | – |
| htmlMessages | array | yes | – |
| htmlTotalMessages | integer | yes | – |
| htmlTruncated | boolean | yes | – |
| links | array | yes | – |
| report | string | yes | – |
| schemaIssues | array | yes | – |
| schemaTotalIssues | integer | yes | – |
| schemaTruncated | boolean | yes | – |
| seoIssues | array | yes | – |
| seoTotalIssues | integer | yes | – |
| seoTruncated | boolean | yes | – |
| summary | object | yes | – |
No examples provided.
schema.markup Validate JSON-LD syntax ~50
Parses JSON-LD blocks in supplied HTML locally and reports empty blocks or JSON syntax errors. It does not validate vocabulary semantics.
| Name | Type | Req | Description |
|---|---|---|---|
| htmlContent | string | yes | Raw HTML containing JSON-LD script blocks. |
| Name | Type | Req | Description |
|---|---|---|---|
| counts | object | yes | – |
| error | string | – | – |
| issues | array | yes | – |
| totalIssues | integer | yes | – |
| truncated | boolean | yes | – |
No examples provided.
screenshot.capture Capture responsive screenshots ~112
Renders a local HTML file or HTTP(S) URL in a sandboxed local Chromium browser and writes PNG screenshots to the requested directory. Downloads the pinned headless browser on first use if it is not already cached. Existing matching files may be replaced.
| Name | Type | Req | Description |
|---|---|---|---|
| outputDir | string | – | Directory where PNG screenshots will be written. |
| targetPath | string | yes | Local HTML path or HTTP(S) URL to render. |
| viewports | array | – | Optional viewport definitions; defaults to desktop, tablet, and mobile sizes. |
| Name | Type | Req | Description |
|---|---|---|---|
| error | string | – | – |
| outputDirectory | string | yes | – |
| screenshots | array | yes | – |
No examples provided.
seo.metadata Audit SEO metadata ~84
Audits supplied HTML offline for on-page SEO metadata, headings, viewport, image alternatives, and Open Graph issues. Use for a quick on-page check; use html.local/html.url for W3C HTML validation, schema.markup for JSON-LD syntax, or report.validation for a combined local-file report.
| Name | Type | Req | Description |
|---|---|---|---|
| htmlContent | string | yes | Raw HTML markup to inspect locally. |
| Name | Type | Req | Description |
|---|---|---|---|
| counts | object | yes | – |
| error | string | – | – |
| issues | array | yes | – |
| totalIssues | integer | yes | – |
| truncated | boolean | yes | – |
No examples provided.
How do I install the Web Validator by DigestSEO MCP server?
Web Validator by DigestSEO runs locally as an npm package, launched with npx -y mcp-web-validator. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · mcp-web-validator
claude mcp add akzar1el-mcp-web-validator -- npx -y mcp-web-validator
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 npm package (mcp-web-validator).
Is the Web Validator by DigestSEO MCP server safe to use?
Web Validator by DigestSEO scores 96 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 4 November 2026. It declares no install or post-install scripts. Its build provenance is signed and verified. 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: html.local, html.url, css.local, seo.metadata, links.broken, and 3 more. Their descriptions and schemas cost roughly 638 tokens of context every time the server is loaded.
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 4 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.
What licence is the Web Validator by DigestSEO MCP server under?
Web Validator by DigestSEO declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.