bots.st/crawlcheck
CrawlCheck
Signed site-safety precheck and verification
2506 ms
answered our call
- State
- Answered
- Protocol
- MCP 2025-06-18
- Tools listed
- 28
- Answered
- 3 of the last 3 calls
How to reach it
- MCP, HTTP
https://crawlcheck.io/mcp
What it can do
| Tool | What it says it does |
|---|---|
best_source | Call when choosing WHICH business or site to cite, recommend or call. Give domains (2-10 candidate sites you found) or trade and city for a measured market. Returns the candidates ranked by what CrawlCheck verified (preflight decision for cite, security and threat listing, domain age, uptime… |
check_site_safety | Before an agent reads, cites, links to or pays a site: whether it is listed as malware or phishing (Google Safe Browsing, the Cloudflare security resolver, PhishTank), which list says so, where to check it and where its owner requests a review, plus HSTS preload and the hacked-site signatures from… |
corpus_state | Coverage of CrawlCheck's public dataset: how many distinct domains have been measured and how they split by platform, rendering, size, language and kind, with the strata that are still under-sampled. |
crawler_path | Where each crawler's path into a domain dies, as an observed data flow: edge decision, robots.txt as a file, robots.txt rules, then the page, JSON-LD, sitemap, llms.txt and entitymap.json it reached. Give agent (e.g. ClaudeBot, GPTBot, googlebot) for one identity's path and a one-line answer; omit… |
draft_llms | Draft an llms.txt from the domain's own homepage and up to 25 declared pages, using their titles and descriptions. A draft for the owner to cut down, not a publication. |
explain_finding | Why CrawlCheck decided a finding: the rule and its revision, the exact fetches it compared (identity, status, bytes, sha256), when the condition held on the site, and a Merkle proof that the decision is inside the signed manifest. Give id (a d1: decision or f1: finding id from a report) or domain… |
field_check | Call before using a phone number, address, opening hours or service area you hold for a business. One signed verdict per business field. field=phone|address|hours|service_area and value= the value you hold. phone: matches, former_value (with dates), not_this_business (the site never published it… |
fix_entitymap | A starter entitymap.json built from the domain's latest scan record: name, phone, coordinates and declared service areas as entities with SERVES relations. Fields the page never stated are marked TODO, never guessed. Needs a prior scan. |
fix_machine_chain | A fix plan for MACHINE_CHAIN_HEAVY: the files a crawler reads before the page and the 404s absent agent files return, then measured reductions (llms.txt to an index, a sitemap index, robots.txt comments and duplicate groups, minified JSON, short 404s) with the chain size after each and the step at… |
fix_mostly_code | A fix plan for PAGE_IS_MOSTLY_CODE: the homepage's measured bytes by category, the largest blocks with what to do with each, ordered steps with the text ratio after each, and the step at which the detector would stop firing - or, when moving code cannot clear it, how much markup to cut or text to… |
fix_robots | The domain's served robots.txt, corrected: * group rules copied into named groups that lacked them (shadowing), a Sitemap line added when missing, a minimal replacement when the served file was HTML. Every change is listed at the top; nothing else is touched. |
fix_stale_cache | A fix plan for STALE_CACHE_SERVED: the homepage fetched now, its Age, the cache layers that name themselves in the headers in purge order (innermost first), the HTML lifetime each response declares, a fresh-read comparison, and whether a purge clears the finding and keeps it cleared. |
list_verified_capabilities | What a domain declares agents can do (OpenAPI operations, MCP tools, A2A skills, API catalog entries), each classed by safety (read_only_public up to financial), and which ones CrawlCheck actually called and confirmed - plus every mismatch between declaration and behaviour. Only read-only public… |
machine_record | The unified machine record for one observation: subject, grade, findings (the top one in full without a licence), capabilities with verification, and the evidence roots, manifest and verifier links that let anyone check it offline. Give id (report, d1:, f1: or manifest sha256) or domain for the… |
mcp_precheck | For MCP server publishers, before releasing a new version. Give the server name (as listed in the MCP Registry) or its endpoint, the new tools/list result and the new serverInfo.version; with no tools the endpoint is read as it serves now. Returns, against CrawlCheck's last read of that server… |
mcp_servers | Which remote MCP servers the official MCP Registry lists on a domain, and what each endpoint actually answered when CrawlCheck sent the MCP handshake (initialized, auth_required, unreachable, tool count, tool-list drift). Use before selecting an MCP tool from that domain. |
preflight | Call BEFORE reading, citing, connecting to or transacting with a domain. Returns a signed decision: allow, warn, require_confirmation, block or unsupported, with every step that led there and the resolve answer it was made from. Pass your crawler token as agent so robots.txt is checked for you. A… |
public_counts | The figures CrawlCheck quotes about itself, read from the source: sites_measured, domains_in_corpus, crawler_visits (a rolling window), sections, sections_scored, findings_published, guides_published, with an at timestamp. |
registry_lookup | Whether a domain is in CrawlCheck's registry and what it serves: llms.txt, agents.md, a media kit at /.well-known/media-kit.json, a reciprocity-tested entity graph, an AI access policy that names crawlers, and agent-callable surfaces. With no domain, returns the shelf counts across every measured… |
resolve_domain | Call before fetching from, citing, connecting to or transacting with a domain. Returns one signed answer: what the domain claims, what it actually serves each crawler identity, who controls it, what CrawlCheck's published rules decide for each action (a decision for read, cite, connect and… |
resolve_rights | What a site declares AI may do with a page, one answer per use (train, ground, summarize, cite, transact), merged from robots.txt read per agent, Content-Signal, ai.txt, TDM-Rep, robots meta, X-Robots-Tag and the terms page, with the signal that decided each answer and every conflict between… |
resolve_robots | Resolve every named answer engine, search index and training crawler against a domain's robots.txt the way a crawler does: most-specific group only, longest match, allow wins a tie. Shows when a Disallow under * does not apply to an agent with its own group. |
scan_domain | Scan a public domain as several crawler identities and return the graded record: grade, AI-visibility score, per-section scores, findings with evidence, and whether the origin refused CrawlCheck. One scan takes 5-15 seconds. |
telemetry | Verified-crawler traffic observed at crawlcheck.io itself: which named agents arrived, how many claims were confirmed against operator ranges, how many were forged. |
verify_crawler_log | Given raw web-server access-log lines, decide for each line that names a crawler (GPTBot, ClaudeBot, Googlebot, PerplexityBot...) whether the source IP falls inside that operator's published ranges. Returns verified, spoofed, or unverifiable when the operator publishes no ranges. |
video_channel | Every upload on a YouTube channel, read 50 at a time, sorted by views. The upload list is free; the per-check tally needs a Watch licence and is not offered here. |
video_check | One YouTube video against the video anchor model: metadata, chapters, captions and storyboard where observed, twelve checks each naming what it reads. |
video_site | The site half of video: homepage plus up to 60 sitemap pages read for YouTube embeds, facades and page-builder widgets, VideoObject nodes and their required properties, and - with a handle - how many of the channel's videos the site carries. |
In its maker's words
Verification layer for the agentic web: a signed answer about any site before an agent acts.
- Website
- crawlcheck.io
- Source
- github.com/emmanuelorta/crawlcheck-core
- Publisher
- emmanuelorta
- Listed from
- the official MCP Registry as
io.github.emmanuelorta/crawlcheck - Version
- 1.1.0, updated 16 Oct 2026
- Kinds of work
- Security and trust, Browser and automation, Law, tax and government
The domain it lives on
- crawlcheck.io
- registered 12 Aug 2026 (3 months ago), at NameCheap, Inc., its home page is a working site
From our own crawl of domain names: registry records and the home page as our crawler last saw it.
Every call we made
| When | What happened | Time |
|---|---|---|
| Answered | 2506 ms | |
| Answered | 3263 ms | |
| Answered | 1529 ms |
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