dev.llms-txt-validator/llms-txt-validator
Validate a site's llms.txt against the spec: fetches every linked URL, scores it 0-100.
MCP server · by llms-txt-validator.dev
About
dev.llms-txt-validator/llms-txt-validator is an MCP server published by llms-txt-validator.dev. Marketplaces we read that list it: 1 (Official MCP Registry). We first saw it on 2026-10-11 and have recorded no change since. As of our marketplace pass on 2026-10-13.
What it asks for
- Runs remotely
None of the marketplaces we read publishes its tools or the settings it asks for.
What it declares, asks for and runs, in full
Only install plugins from developers you trust. We list what marketplaces publish and do not test plugins.
Works with
- Claude Code
- Codex
- Cursor
- VS Code
- Copilot CLI
A one-click link opens the client, which asks you to confirm before it adds the server.
From the marketplaces that list it and the MCP transport it declares, as each client documents them. We do not test plugins.
Connect
Commands and configs built only from what its marketplaces declare. We do not run them for you and do not test plugins.
As a remote MCP server
Built from what Official MCP Registry declares.
claude mcp add --transport http llms-txt-validator https://llms-txt-validator.dev/mcp[mcp_servers.llms-txt-validator]
url = "https://llms-txt-validator.dev/mcp"{
"mcpServers": {
"llms-txt-validator": {
"url": "https://llms-txt-validator.dev/mcp"
}
}
}Where it is published
| Marketplace | Status | Version | Figures | Verified | First seen |
|---|---|---|---|---|---|
| Official MCP Registry (Open the registry record) | Listed | 1.0.0 | No figure published | Not marked |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
What changed
Nothing has moved on this plugin since we started watching it.
Similar plugins
Products whose own names, descriptions, tools and skills are closest in meaning to this one, on every marketplace we read. Closeness is ranked within this list only.
-
Checks whether a website has a usable llms.txt. Score 0–100. Free 3/day/IP, then ¥10.
-
Create, validate and audit llms.txt, incl. the Lighthouse Agentic Browsing check.
-
Build llms.txt from local Markdown or a sitemap.xml and check an existing llms.txt file.
-
Markdown Lane Check - llms.txt, .md twins, Accept: text/markdown
Six checks: llms.txt, llms-full.txt, .md twins, Accept: text/markdown, sitemap.md, alt link. Free.
-
檢查網站 llms.txt 與 AI 爬蟲 robots.txt 設定，並自動產生 llms.txt。
-
llmsmap.me International Directory
Read-only search and discovery for the international llms.txt directory maintained by llmsmap.me.
-
Score any URL against a real design contract — 44 checks, A-F grade, token + motion validation.
-
Licence audit, page read and endpoint check (AI-operated)
AI-operated. Free previews: licences, page reads, endpoint checks. Paid full versions over x402.
-
Audit public webpages and supplied markup for HTML, CSS, SEO, JSON-LD, and link issues.
-
Accessibility and WCAG data for your own websites: fix lists, live checks, and fix validation.
Similar plugins by marketplace
The same question asked of one marketplace at a time: is there an analog of this plugin there?
Has a listing on Claude Code: claude-plugins-community (5)
-
Audits public-facing websites across accessibility, SEO, GEO (AI search readiness), and usability -- evaluates 17 checks, assigns a letter grade, and generates a client-ready PDF…
-
LGBTQIA+ safety tools for LLM engineers — audit prompts, review code, and catch harms before you ship
-
Audit your Claude plugins, skills, and coding agents against the SOSA methodology — Supervised Orchestrated Secured Agents. Scans your entire plugin ecosystem and evaluates each…
-
Audits your app's Privacy Policy, ToS, Cookie Policy and DPA against its actual codebase. Scans your dependencies, DB schema, and API routes to find undisclosed data collection…
-
Turn LLM instructions (skills, plugins, prompts) into standalone, deterministic scripts — more reliable than agent calls, with no token cost and faster execution.
Has a listing on Claude Code: claude-plugins-official (5)
-
Skills for adding DeepEval evaluations, tracing, datasets, Confident AI reports, and iterative improvement loops to AI applications.
-
Skills for working with Langfuse, the open-source LLM engineering platform for tracing, prompt management, and evaluation.
-
The Vanta plugin connects Claude Code to Vanta's security and compliance platform through the Vanta MCP server. It combines Vanta's test-specific remediation intelligence with…
-
Automate API security directly in Claude Code with 42Crunch - automatically audit OpenAPI specs, detect vulnerabilities aligned with OWASP API Security risks (including…
-
Security review for Claude-generated code. Pattern-based warnings on edits, LLM-powered diff review on Stop, and an agentic commit reviewer that catches injection, XSS, SSRF…
Has a listing on Claude: knowledge-work-plugins (5)
-
Skills for working with Langfuse, the open-source LLM engineering platform for tracing, prompt management, and evaluation.
-
The Vanta plugin connects Claude Code to Vanta's security and compliance platform through the Vanta MCP server. It combines Vanta's test-specific remediation intelligence with…
-
Security review for Claude-generated code. Pattern-based warnings on edits, LLM-powered diff review on Stop, and an agentic commit reviewer that catches injection, XSS, SSRF…
-
Keep your coding agent up to date with the latest web best practices
-
Sanity content platform integration with MCP server, agent skills, and slash commands. Query and author content, build and optimize GROQ queries, design schemas, and set up Visual…
Has a listing on Codex: openai-curated (openai/plugins) (5)
-
Evaluate Codex skills and plugins from chat with a beginner-friendly start command, local-first reports, token budget explanations, and guided benchmarking.
-
AI-powered code review in Codex, powered by CodeRabbit.
-
Codex Security workflows for security scans, analysis, and investigation.
-
Cloudflare platform plugin with curated skills for Workers, Wrangler, and Agents SDK plus the official Cloudflare API MCP server.
-
Use MagicPath to find, inspect, install, create, and edit UI components from Codex.
Has a listing on Community GitHub marketplaces (5)
-
Accessibility and WCAG data for your own websites: fix lists, live checks, and fix validation.
-
Checks a Markdown folder's OKF frontmatter tier, locally. No-egress is a vendor claim: see README.
-
Free website privacy scanner for evidence-backed public website preflight.
-
tools-mcp io.github.First-CH/tools-mcp
MCP tools: WCAG contrast, JP char/X-weight count, WebP convert, JSON-LD, llms.txt.
-
GEO scores and content-rewrite suggestions for any web page, as MCP tools.
Has a listing on Copilot CLI: github/awesome-copilot (5)
-
Three-layer verification pipeline for AI output. Extracts claims, finds sources, and flags hallucination risks so humans can verify before acting.
-
Inspect a repository, improve Tiny Tool Town readiness, submit its listing issue, and launch remediation work.
-
Keep your coding agent up to date with the latest web best practices
-
Codebase-grounded concept-mastery quizzes with an interactive BrainMax Canvas dashboard.
-
A runtime-portable 5-agent quality gate that adjudicates text artifacts before they ship. Five role-conditioned LLM deliberators run a 2-round async protocol with cross-read…
Has a listing on Copilot CLI: github/copilot-plugins (5)
-
Advanced Security plugin for GitHub Copilot.
-
Toolkit for building Microsoft 365 Copilot declarative agents — scaffolding, JSON manifest development, and capability configuration.
-
workiq
Query Microsoft 365 data with natural language — emails, meetings, documents, Teams messages, and more.
-
mcp-apps
Generate MCP App widgets for MCP tools. Produces self-contained HTML widgets using the MCP Apps protocol.
-
Build Power Apps Canvas Apps using the Canvas Authoring MCP server.
Has a listing on Cursor: cursor/plugins (5)
-
CLI-backed repo compatibility scans plus agents that audit startup, validation, and docs against reality.
-
playwright-mcp io.github.microsoft/playwright-mcp
Playwright Tools for MCP
-
Generate presentations, documents, and webpages.
-
Search company knowledge and draft verified answers.
-
Track AI visibility, sentiment, and citations.
Has a listing on Docker MCP Catalog (5)
-
Discovers and retrieves llms.txt from websites.
-
playwright-mcp io.github.microsoft/playwright-mcp
Playwright Tools for MCP
-
Production-ready RAG service to search and retrieve data from your documents.
-
MCP server for AI access to SmartBear tools, including BugSnag, Reflect, Swagger, PactFlow, QTM4J.
-
Analyze documents, images, videos, and audio.
Has a listing on Official MCP Registry (5)
-
Checks whether a website has a usable llms.txt. Score 0–100. Free 3/day/IP, then ¥10.
-
Create, validate and audit llms.txt, incl. the Lighthouse Agentic Browsing check.
-
Build llms.txt from local Markdown or a sitemap.xml and check an existing llms.txt file.
-
Markdown Lane Check - llms.txt, .md twins, Accept: text/markdown
Six checks: llms.txt, llms-full.txt, .md twins, Accept: text/markdown, sitemap.md, alt link. Free.
-
檢查網站 llms.txt 與 AI 爬蟲 robots.txt 設定，並自動產生 llms.txt。
Found by meaning, not by shared code or a shared repository: similar plugins stay separate products, and this is not a review or a recommendation.
Is this your plugin?
Add it to your projects and prove you maintain it with a file in its repository, a file on your domain or a DNS record. You get alerts when a marketplace lists it, drops it, changes its verified mark or what it asks for, and its remote endpoint goes on monitoring as a web service.
Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.