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Independent measurements of remote MCP servers. Every observation has a timestamp.

Read-only probes

MCP server · Data access / search

OnPage.dev

Free SEO MCP that closes the loop: find, fix, ship as a PR or to a CMS, prove. 37 tools, no key.

Checks passed
15 / 22

0 failed · 7 not measured

Median response
154 ms

Median of successful probes over 7 days

30-day uptime
Not measured

Share of countable probes over 30 days, including daily rollups. Auth challenges are excluded.

Discovered tools
37

Tool definitions returned by this server

Independent monitoring

Health & checks

Status history

Responded

The server completed its last measured handshake. This is an observation, not a guarantee.

Last checked
Check summary by test group
Test areaPassedFailedUnmeasured
ConnectionCan a client connect and discover tools?
500
Reliability & speedDoes it respond consistently and quickly?
103
Access & authenticationWhat is required to use this server?
102
Tool qualityAre the tool definitions usable by an agent?
400
Publisher identityCan the publisher be traced to its source?
402

Unmeasured means there is not enough evidence to decide. How these checks work

Inspect individual checks 22 recorded

Core

  • Pass
    Reachable

    Latest probe returned HTTP 200 in 78 ms.

  • Pass
    Valid handshake

    protocolVersion 2025-11-25, serverInfo.name onpage-dev.

  • Pass
    Lists tools

    tools/list returned 37 tools.

  • Pass
    Current protocol

    Negotiated 2025-11-25. The bar is 2025-06-18 or newer.

  • Pass
    HTTPS

    The endpoint URL is https.

Performance

  • Not measured
    Fast (p50)

    Median latency 154 ms over 2 samples in 7 days. The bar is 1000 ms. Need at least 5 samples.

  • Not measured
    Consistent (p95)

    95th percentile 222 ms over 2 samples in 7 days. The bar is 3000 ms. Need at least 20 samples.

  • Not measured
    Reliable (uptime)

    2 of 2 attempts returned a tool list in 30 days (100%). The bar is 99%. Need at least 30 samples.

  • Pass
    Stable tool list

    No tool was removed and no required parameter was added in the last 30 days.

Access

  • Pass
    Open access

    tools/list succeeded with no credential, and the record declares none.

  • Not measured
    Standard auth

    Auth is not required, so the OAuth metadata check does not apply.

  • Not measured
    Free tier cited

    No publisher quote has been checked.

Tools

  • Pass
    Tools described

    Every tool description is at least 20 characters.

  • Pass
    Valid input schemas

    Every inputSchema is a JSON Schema object.

  • Pass
    Parameters documented

    322 of 350 parameters have a description (92%). The bar is 80%.

  • Pass
    Safety hints

    Every tool sets readOnlyHint or destructiveHint.

Publisher

  • Pass
    Verified namespace

    Listed in the Official MCP Registry.

  • Pass
    Website matches publisher

    The website host matches the reverse-domain namespace.

  • Pass
    Source repo linked

    A repository URL is on file.

  • Not measured
    Repo owner matches

    This namespace is not an io.github login, so the owner comparison does not apply.

  • Pass
    Recently updated

    Updated 2026-10-14T23:49:20.330358Z, within 180 days.

  • Not measured
    Open-source licence

    The GitHub licence lookup has not returned an OSI result yet.

Start using OnPage.dev

Connect to this server

Choose your client, copy the configuration, then enable the server in your client’s MCP settings.

Run this command in your terminal, then restart Claude Code.

Claude Code

claude mcp add --transport http onpage-dev https://onpage.dev/mcp

Capabilities

Tools 37

accessibility

Accessibility for people and the European Accessibility Act. Pick with mode: wcag = WCAG 2.1 AA checks. Needs url. screen_reader = The page as a screen reader reads it. Needs url.

Discovered
ai_visibility

Whether AI assistants can read, quote and recommend a site. Pick with mode: check = AI crawler access, llms.txt, 15 citability checks and the page as a model reads it. Needs url. bots = Fetch the page as Googlebot, GPTBot, ClaudeBot, PerplexityBot and more against a browser: firewall blocks, challenges, cloaking. Needs url. gaps = Where AI answers name competitors, not you, from Brand Radar or similar. Needs site, brand, responses[{question, response, links, search_queries, engine, volume}]. citations = What pages cited by AI do differently, from citation counts. Needs pages[{url, chatgpt, perplexity, gemini, google_ai_overviews, google_ai_mode}].

Discovered
answer_readiness

Whether a page answers the questions people ask AI and Google. Pick with mode: questions = Sub-questions AI Mode fans out to, and which the page answers. Needs url, topic, questions. passages = The passages that answer given questions, or the gaps. Needs url, question. format = Answer format against the pages that rank. Needs url, question, competitors.

Discovered
backlinks

Turn backlink data from Ahrefs, Semrush or similar into links won back, won or cleaned up. Pick with mode: broken = Broken and lost backlinks and 404 visits into 301s and outreach. Needs rows[{target_url, source_url, anchor, domain_rating, dofollow, http_code}]. opportunities = Sites linking to competitors, and unlinked brand mentions. Needs site. outreach = One outreach email per site, as drafts for the user's mail after approval. Needs your_site, prospects[{page, type, your_url, dead_url, anchor, contact}]. disavow = A conservative disavow.txt, only after a manual action or clear negative SEO. Needs rows[{url_from, domain, is_spam, domain_rating, anchor, traffic}], reason.

Discovered
check_keyword

How pages target a keyword. Pick with mode: focus = One page against one keyword: 8 checks. Needs url, keyword. cannibalization = Your pages competing for one keyword, side by side on every signal, with the plan. Needs keyword, target_url.

Discovered
check_links

Status of URLs and links. Pick with mode: urls = Status, redirect chain and canonical of a list of URLs. Needs urls. outbound = Dead or moved links from a page to other sites, with archived copies. Needs url.

Discovered
compare

Compare pages side by side. Pick with mode: pages = Your page against up to 3 competitors. Needs url, competitors. html = Two versions of HTML before and after. Needs before, after. preview = Deploy preview against production before merging. Needs preview_url, production_url.

Discovered
content

What to write and how, in the site's own voice, from the pages that rank and the user's search data. Pick with mode: brief = A content brief from the pages that rank. Needs keyword, competitors. topics = Search Console queries into topics, with the page that owns each, and keyword gaps. Needs rows[{query, page, clicks, impressions, position, url}]. intent = Your page against the search intent of the pages that rank. voice = Learn how the site writes from its best articles. Needs urls. calendar = A dated calendar of refreshes and new pages, steered by what worked here. draft = A draft against the site's voice, sources and SEO, before approval. Needs html.

Discovered
dashboard

A daily SEO data feed for key pages and a live dashboard in the chat. Pick with mode: feed = Start a daily feed of key pages; returns feed_id. Needs url. data = The feed as clean tables over time. Needs feed_id, dataset. build = Blueprint for a live SEO command center with realtime GA4 visitors. Needs feed_id.

Discovered
edge_worker

Fixes applied at the edge on the user's own Cloudflare, on any CMS. Pick with mode: rules = One Worker that fixes a whole section by rules. Needs audit_id. prerender = Serve rendered HTML to AI crawlers for JavaScript apps. Needs url.

Discovered
entity

How Google understands who is behind a site. Pick with mode: graph = Organization, sameAs, logo and founder in structured data. Needs url. trust = Author, about, contact and policy signals. Needs url.

Discovered
explain_google

Explain what Google Search Console and Bing Webmaster Tools report, and what to do. Pick with mode: index_status = Index coverage and rich result statuses, with the fix. Needs rows[{url, coverageState, verdict, indexingState, robotsTxtState, pageFetchState}]. manual_action = A manual action, with the cleanup plan and reconsideration draft. Needs action. bing = Bing Webmaster crawl issues, and Bing against Google per query.

Discovered
find_opportunities

Turn Search Console, GA4 or Ahrefs rows (also rows the user pastes) into the fastest wins, instead of judging them by hand; content_decay and traffic_drop take search_type for Discover, News, Image or Video rows. Pick with mode: ctr_gaps = Page 1 results with a click-through rate far below normal. Needs rows[{position, page, query, clicks, impressions, ctr}]. striking_distance = Queries at positions 8 to 20 worth a push. Needs rows[{position, page, query, clicks, impressions, ctr}]. content_decay = Pages slowly losing clicks over months: a refresh queue. Needs rows[{url, month, clicks}]. traffic_drop = Explain a drop page by page, by device and country. Needs rows[{url, before, after, query, device, country}]. prune = Keep, refresh, merge (301), noindex or remove (410) per page. Needs rows[{url, clicks, impressions, conversions, referring_domains, inlinks}]. discover = Readiness for Google Discover and News, with Discover or News rows. paid_organic = Google Ads terms against Search Console: ad spend you can test cutting, content to write. Needs ads[{term, cost, clicks, conversions}], gsc[{query, position, clicks, page}]. anomalies = Spike and drop days in daily rows, with Google updates near them. Needs rows[{date, clicks, impressions, page}]. ai_queries = Question and prompt-style queries per page, for AI answers. Needs rows[{query, page, clicks, impressions, position}].

Discovered
fix_log

Record shipped fixes, keep them live and report on them. Pick with mode: log = Record a shipped fix; checked every 6 hours, restore code on regression. Needs fixes[{url, field, new, old, via, ref}]. report = Every fix with status and results: a monthly client report. Needs fix_log_id.

Discovered
get_fix_pack

Fixes ready to ship: as code, for a CMS through its MCP, as a pull request or at the edge. Pick with mode: fixes = Title, description, canonical, social tags, JSON-LD; platform html, wordpress, shopify, webflow, wix, storyblok, sanity, contentful, strapi, ghost, magento, git or cloudflare. Needs url. alt_texts = Write and ship missing alt texts. Needs url. web_vitals = Speed fixes as tags, WordPress steps or a Worker. Needs url. wordpress = Send fixes, new drafts and post updates to the OnPage.dev WordPress plugin for one-click approval and undo. Needs site_key.

Discovered
internal_links

Internal links and link equity. Pick with mode: suggest = Links to add, with anchors, applied by Worker or CMS. Needs audit_id. equity = Internal PageRank and click depth from a site audit. Needs audit_id.

Discovered
layout

What visitors and crawlers see on every screen size. Pick with mode: render = First screen on phone, tablet and desktop in a real browser, and what crawlers without JavaScript get (default). Needs url. probe = A measurement script to run in the user's own browser tool. analyze = Analyse the results of that script. Needs url, results.

Discovered
llms_txt

The llms.txt file for AI assistants. Pick with mode: generate = Write one from the sitemap and home page. Needs url. validate = Check an existing one and its links. Needs url.

Discovered
local

Local search: the site, the Business Profile and the map. Pick with mode: check = LocalBusiness markup, NAP, locations and the Business Profile (default). Needs url. reviews = Reply drafts for Google reviews, unhappy ones first, for the user's GBP connector after approval. Needs reviews[{rating, author, text, date, replied, review_id}]. demand = Business Profile search terms and geo-grid ranks into new service and location pages.

Discovered
measure

Prove and measure with numbers from the user's Search Console, GA4, Ahrefs or Semrush, including numbers the user pastes. Use it instead of calculating by hand: it handles spelling variants, control groups and trends. Pick with mode: impact = Before and after fixes, against pages you did not touch. Needs pages[{url, before, after, changed, fix}]. ai_citations = AI citations before and after, per engine. Needs pages[{url, before, after, changed}]. ai_referrals = Visits from ChatGPT, Perplexity, Gemini and other assistants, from GA4. Needs rows[{source, sessions, landing_page, period, conversions, revenue}]. brand_split = Brand versus non-brand clicks and how each moved. Needs brand_terms, rows[{query, keyword, clicks, traffic, impressions, position}]. share_of_voice = Share of the clicks against competitors from rank rows. Needs your_domain, rows[{keyword, position, volume, domain, url, group}].

Discovered
plan

Plans for migrations, experiments and the team. Pick with mode: redirects = Redirect map for a migration or URL change. split_test = SEO split test on a page template, with the Worker. Needs urls, field, pattern. sprint = Fixes into a week plan of tickets per role. Needs fixes[{title, url, detail, severity, impact, effort}].

Discovered
prioritize_fixes

Use when Search Console, GA4, Ahrefs or Semrush data is available, also to explain a traffic drop (pass clicks_previous): ranks the fixes by the traffic or revenue they can win. Rank SEO fixes by how much traffic they can win, using data from the user's other connected tools. With GA4, also pass each page's organic conversions (key events) or revenue, and fixes are ranked by the money they can bring instead of clicks.

Discovered
request_recrawl

Get changed pages recrawled. Pick with mode: recrawl = Check pages are indexable, sitemap lastmod entries, IndexNow and Search Console steps (default). Needs urls. indexnow = Submit URLs to IndexNow, or set up the key. Needs urls.

Discovered
robots_txt

robots.txt for search and AI crawlers. Pick with mode: test = Which crawlers may fetch a URL, and the rule that decides. Needs url. ai_policy = Rules per AI crawler: allow AI search, block training. Needs url, policy.

Discovered
scan_page

Scan a page for Google and AI search: 0-100 score, issues to fix first with why and how, AI readiness and key facts. Pick with mode: page = A live page by url (default). Needs url. html = Unpublished HTML before deploy, to gate a release. Needs html. deep = Everything measured on one page, by section. Needs url. rescan = Scan again after fixes and compare with the last scan. Needs url.

Discovered
schema

JSON-LD structured data for rich results. Pick with mode: generate = Write JSON-LD for a page: type Article, Product, FAQPage, Organization, BreadcrumbList, VideoObject, Event, Recipe, JobPosting, SoftwareApplication, ProfilePage or Course. Needs url. validate = Validate JSON-LD for rich results. Needs jsonld. product_page = Check an existing ecommerce product page (price, stock, merchant listing fields). To write Product JSON-LD use generate with type Product. Needs url.

Discovered
share

Send results where the team works. Pick with mode: link = A link to the visual report. Needs url. export = A Google Sheet, CSV, Slack message or one task per issue.

Discovered
site_audit

Audit a whole site, step by step, and work with the result. Pick with mode: start = Start an audit of up to 25 pages; returns audit_id. Needs url. continue = Scan the next pages; call until complete. Issues by code, sections, average score. Needs audit_id. import = Turn a crawl from Screaming Frog, Ahrefs or Semrush (up to 500 pages) into an audit_id. Needs pages[{url, status, redirect_to, title, meta_description, h1}]. compare = What changed since the last audit, or against a competitor audit. Needs audit_id. report = A client-ready report page with a link. Needs audit_id.

Discovered
site_memory

A memory per site that every OnPage.dev tool writes to, across chats and clients. Open it first when working on a site over time. Pick with mode: open = Open or create the memory, bind it to this chat, get the brief and next steps (default). Needs url. next = The best next steps from everything recorded. timeline = What happened, newest first. note = Record a decision or context. Needs note. forget = Delete the memory (ask the user first). Needs memory_key.

Discovered
sitemap

The XML sitemap. Pick with mode: check = Check the sitemap and a sample of its URLs. Needs url. generate = Write a sitemap from a page list or audit. Needs audit_id.

Discovered
snippet

How a page looks in Google and when shared, measured in pixels the way Google truncates. Use it instead of estimating title or description length. Pick with mode: search = Title and description as Google shows them; give title (and description) or a url to read them. social = Open Graph and X cards, and the share image. Needs url.

Discovered
technical

Technical checks across pages and logs. Pick with mode: hreflang = Hreflang across language versions, with the corrected tag set. Needs url. parameters = URL parameters and filters that waste crawl budget. duplicates = Duplicate and near-duplicate pages. Needs audit_id. extract = One value pulled from many pages. Needs urls. logs = Access logs: what Googlebot and AI crawlers really crawl, with IP verification. Needs log.

Discovered
text_quality

Readability and correct language. Pick with mode: readability = Readability that fits the page and the pages that rank. Needs url. spelling = Spelling and grammar errors in about 30 languages. Needs url.

Discovered
track_rankings

Use for ongoing rank tracking without picking keywords by hand. Each run, fetch Search Console rows by query and page (last 7 or 28 days) and, if connected, the rows of Ahrefs Rank Tracker (rank-tracker-overview) or Semrush Position Tracking, plus GA4 conversions or revenue per landing page if available, and pass them with the tracker_id (leave it out on the first run to create a tracker).

Discovered
tracking

Whether analytics and consent are set up right, and whether the numbers add up. Pick with mode: ga4 = GA4 tags, events and duplicates. Needs url. consent = Cookie banner and Consent Mode v2. Needs url. gsc_vs_ga4 = Search Console clicks against GA4 sessions per page: broken or filtered tracking. Needs gsc[{page, clicks}], ga4[{landing_page, sessions}].

Discovered
watch

Monitoring that runs on its own and posts changes to a webhook. Each kind takes action create (default), status or stop where it applies. Pick with mode: page = Watch one page (or a competitor page with competitor_of) for SEO changes. Needs url. page_status = Latest result of a page watch. Needs watch_id. page_stop = Stop a page watch. Needs watch_id. site_audit = Audit the whole site every 1, 7 or 30 days and alert on regressions. guard = Every 6 hours: robots.txt, sitemap, https, noindex and canonical on key pages, for deploy accidents. competitors = Weekly new, updated and removed pages from competitors' sitemaps, flagged by your topics.

Discovered
web_vitals

Core Web Vitals from real Chrome users. Pick with mode: now = The latest field data for a page or site. Needs url. trend = Weekly history, before and after a change date. Needs url.

Discovered

Recent measurements

Probe history

View status
Latest stored probes. Raw probe rows are kept for 14 days.
CheckedResultResponseTools
Connected78 ms37
Connected230 ms37