Site Check
REMOTE · MCP.MODERNMUSTARDSEED.COM
Public website health scan, AI-crawler and structured-data readiness, and a local presence score.
Available components
Last scanned (23 hours ago)
Scores higher than 71% of remote servers
Reachable. Last reached 22 Oct 2026.
Category Marketing and SEO
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 Security80
- 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 is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- 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 Usability65
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 937 tokens (~234/item across 4 items; 4 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management33
- Stability observed for 10 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage95
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 85% of tool parameters carry a description.Partial
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 4 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 5 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a current MCP spec version (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.
- 21 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 27 to 30. That category is still filling its 30-day observation window: 8 days of observed history at the previous scan, 9 at this one. The score rises as the window fills, whether or not the server changes.
- 19 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.
- 17 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.
- 15 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.
- 13 Oct 26 +1
- Stability: unverified → 0.03 ▲ functional
- 12 Oct 26 71
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 22 Oct 2026 · Probed https://mcp.modernmustardseed.com/site-check
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=mcp.modernmustardseed.com | CN=YR2,O=Let's Encrypt,C=US | 11 Oct 2026 | 9 Jan 2027 | RSA 2048 | SHA256-RSA | 5037aab1b1b95f22d0713db17fad3a7354f |
| SANs: mcp.modernmustardseed.com | ||||||
| CN=YR2,O=Let's Encrypt,C=US (CA) | CN=Root YR,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | RSA 2048 | SHA256-RSA | 4ebd24947e24d394802d84a52fd5b319 |
| CN=Root YR,O=ISRG,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | RSA 4096 | SHA256-RSA | f24b6d17f9d9ad7cb1c9fea78782699f |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of mcp.modernmustardseed.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| modernmustardseed.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 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=63072000 |
| x-content-type-options | nosniff |
| x-frame-options | SAMEORIGIN |
| referrer-policy | strict-origin-when-cross-origin |
| permissions-policy | camera=(), microphone=(), geolocation=() |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://mcp.modernmustardseed.com/site-check | Verified | 200 | |
| http (plaintext) | http://mcp.modernmustardseed.com/site-check | HTTPS enforced | 308 | https://mcp.modernmustardseed.com/site-check |
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 →
check_ai_search_readiness Check AI search readiness ~119
Check whether AI assistants and answer engines can read and quote a public website: which AI crawlers (GPTBot, ClaudeBot, PerplexityBot, Google-Extended and others) its robots.txt allows or blocks, whether it publishes llms.txt, which structured data types it declares, how its title and description read, and the search and AI checks with fixes. Shares the 24 hour cache with scan_website.
| Name | Type | Req | Description |
|---|---|---|---|
| url | string | yes | The website to check, such as example.com. Only public http and https sites. |
No output schema declared.
No examples provided.
explain_check Explain a check ~83
Explain one Site Check check by its id (as returned by scan_website): what it measures, the pass and fail thresholds, why it matters, how to fix it, and the typical effort. Static reference, no network access.
| Name | Type | Req | Description |
|---|---|---|---|
| check_id | string | yes | The check id, for example dmarc, ai-bots, llms or tap-to-call. |
No output schema declared.
No examples provided.
scan_website Scan a website ~245
Run a measured health check of a public website homepage: speed (server response, page weight, scripts, image formats), security (HTTPS, certificate expiry, security headers), domain registration expiry, email authentication (MX, SPF, DMARC), search basics (title, description, headings, indexability, sitemap), AI search readiness (structured data, AI crawler rules, llms.txt) and contact paths (tap to call, forms, analytics). Every result is measured, not judged by a model, and each warn or fail comes with a fix and an effort level. Returns a 0 to 100 website score, the top fixes, and how the page appears in a search result. Results are cached for 24 hours. Use detail "full" to include passing checks.
| Name | Type | Req | Description |
|---|---|---|---|
| detail | string | – | "summary" (default) lists only warn and fail checks; "full" lists every check. |
| sections | array | – | Limit the report to these sections. Default: all seven. |
| url | string | yes | The website to scan, such as example.com or https://www.example.com/. Only public http and https sites on ports 80 and 443. |
No output schema declared.
No examples provided.
score_local_presence Score local presence ~419
Score a local business on three pillars, website (45 percent), Google reviews (30 percent) and Google Business Profile (25 percent), and return an overall 0 to 100 score, a letter grade, each pillar with its verdict, and the top fixes. The website pillar comes from a live scan when a website is given. Review and profile facts (rating, review count, phone, address, hours) are supplied by the caller from the user or from a public listing; this tool does not look them up. A pillar with no facts is marked unknown and left out of the overall score rather than scored as zero.
| Name | Type | Req | Description |
|---|---|---|---|
| address | string | – | Street address shown on the listing. |
| business_name | string | yes | – |
| city | string | – | – |
| details_read | boolean | – | True only when the full listing was read, including its hours and website link. Missing hours or a missing website are only scored when this is true. |
| emergency_service | boolean | – | True when the listing says it takes emergency or after-hours work. |
| hours | object | – | Published hours by day, for example {"Monday": "8 AM to 5 PM"}. |
| listing_seen | boolean | – | True when the Google Business Profile was actually looked at. Defaults to true when a rating, review count or Google Maps URL is given. |
| open_24_7 | boolean | – | True when the listing says open 24 hours. |
| phone | string | – | Phone number shown on the listing. |
| rating | number | – | Google star rating, 1.0 to 5.0. |
| review_count | integer | – | Number of Google reviews. |
| source_urls | array | – | Where the listing facts came from, such as the Google Maps URL. |
| state | string | – | – |
| trade | string | – | The trade in snake case, for example plumbing, hvac, roofing, electrical, dental, restaurant. |
| website | string | – | The business website, if it has one. It is scanned live. |
No output schema declared.
No examples provided.
How do I install the Site Check MCP server?
Site Check is a hosted endpoint at https://mcp.modernmustardseed.com/site-check, 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 · mcp.modernmustardseed.com
claude mcp add --transport http com-modernmustardseed-site-check 'https://mcp.modernmustardseed.com/site-check'
What is the Site Check MCP server?
Site Check is an MCP server listed in the public MCP registry as com.modernmustardseed/site-check. Public website health scan, AI-crawler and structured-data readiness, and a local presence score. This page covers its hosted endpoint (https://mcp.modernmustardseed.com/site-check).
Is the Site Check MCP server safe to use?
Site Check 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 Site Check MCP server expose?
Site Check exposes 4 tools: scan_website, check_ai_search_readiness, score_local_presence, explain_check. Their descriptions and schemas cost roughly 866 tokens of context every time the server is loaded.
Does the Site Check MCP server require authentication?
No. We connected to Site Check without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the Site Check MCP server still maintained?
Site Check is still listed as active in the MCP registry. We last reached this channel on 22 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.