CheckWebsiteNow
REMOTE · CHECKWEBSITENOW.COM
Check if a website is down, explain browser errors and score agent readability (MCP, WebMCP).
Available components
Last scanned (13 hours ago)
Scores higher than 84% of remote servers
Reachable. Last reached 5 Nov 2026.
Category Monitoring and Observability
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. Nothing on it is marked destructive, but we can't show that an anonymous caller can only read: full credit needs the server to list at least one tool and every tool to be verifiably read-only. We use a best-effort check of tool names and descriptions to tell read-only tools from tools that change things, so some genuinely read-only tools may not get full credit. Names that start with a read verb (get, list, read, search and similar) and accurate readOnlyHint annotations help. Meet that to earn full credit, or require authorisation. 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 (good).Pass
- Context-footprint check failed: tool/resource definitions use about 1141 tokens (~126/item across 9 items; 9 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 Management77
- Stability observed for 23 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage87
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 56% of tool parameters carry a description.Partial
- 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 9 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 10 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
Checks we ran (13)
- TLS certificate
- Authorization
- HTTPS
- HSTS header
- DNSSEC
- Transport
- Schema quality
- Stability
- Tool coverage
- Injection markers
- Destructive annotations
- Judged manipulation
- MCP protocol
Does not apply to this hosted endpoint (2)
- Supply Chain SecurityScored on package channels only. This is a hosted endpoint, so there is nothing to install or inspect.
- Provenance & TransparencyScored on package channels only. This is a hosted endpoint, so there is nothing to install or inspect.
The score does not measure everything. What the score does not measure →
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.
- 4 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 70 to 73. That category is still filling its 30-day observation window: 21 days of observed history at the previous scan, 22 at this one. The score rises as the window fills, whether or not the server changes.
- 2 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 63 to 67. That category is still filling its 30-day observation window: 19 days of observed history at the previous scan, 20 at this one. The score rises as the window fills, whether or not the server changes.
- 30 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 53 to 57. That category is still filling its 30-day observation window: 16 days of observed history at the previous scan, 17 at this one. The score rises as the window fills, whether or not the server changes.
- 28 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 47 to 50. That category is still filling its 30-day observation window: 14 days of observed history at the previous scan, 15 at this one. The score rises as the window fills, whether or not the server changes.
- 26 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 40 to 43. That category is still filling its 30-day observation window: 12 days of observed history at the previous scan, 13 at this one. The score rises as the window fills, whether or not the server changes.
- 24 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 33 to 37. That category is still filling its 30-day observation window: 10 days of observed history at the previous scan, 11 at this one. The score rises as the window fills, whether or not the server changes.
- 22 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.
- 20 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.
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 5 Nov 2026 · Probed https://checkwebsitenow.com/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=checkwebsitenow.com | CN=YE2,O=Let's Encrypt,C=US | 6 Oct 2026 | 4 Jan 2027 | ECDSA 256 | ECDSA-SHA384 | 6b2b418d87a16d96f01c4a4b174995d8573 |
| SANs: *.checkwebsitenow.com, checkwebsitenow.com | ||||||
| CN=YE2,O=Let's Encrypt,C=US (CA) | CN=Root YE,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | ECDSA 384 | ECDSA-SHA384 | 4df3b15dd6c0784c507cd37b58e6f115 |
| CN=Root YE,O=ISRG,C=US (CA) | CN=ISRG Root X2,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | ECDSA-SHA384 | 872165fc34b6e5fba8add5b3705fb53a |
| CN=ISRG Root X2,O=Internet Security Research Group,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | SHA256-RSA | 6c8f1dc727c7117f7baf853ac980f9cd |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of checkwebsitenow.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | Trust anchor | 20326, 38696 | 8, 8 | Verified |
| com. | DS published | 19718 | 13 | Verified |
| checkwebsitenow.com. | No DS | 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=15552000 |
| content-security-policy | default-src 'self'; script-src 'self'; style-src 'self'; img-src 'self' data:; connect-src 'self'; frame-ancestors 'none'; base-uri 'none'; form-action 'self' |
| x-content-type-options | nosniff |
| referrer-policy | no-referrer |
| permissions-policy | camera=(), microphone=(), geolocation=(), usb=(), payment=() |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://checkwebsitenow.com/mcp | Verified | 200 | |
| http (plaintext) | http://checkwebsitenow.com/mcp | HTTPS enforced | 301 | https://checkwebsitenow.com/mcp |
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_agent_readability Agent Readability Score for a website ~116
CheckWebsiteNow Agent Readability Score 0-100 (our own transparent score, not official) from bounded static evidence: homepage HTML, robots.txt, llms.txt, API/MCP discovery files, sitemap and Markdown negotiation. Every deduction names its fix. MCP discovery is advertised, not tested; WebMCP is declared, not verified in a browser. No scripts run. score is null when too little could be measured.
| Name | Type | Req | Description |
|---|---|---|---|
| hostname | string | yes | Public domain such as example.com (no path, port or IP). |
| Name | Type | Req | Description |
|---|---|---|---|
| band | object | yes | – |
| cached | boolean | – | – |
| checks | array | yes | – |
| coverage | object | yes | – |
| deductions | array | – | – |
| groups | array | – | – |
| headline | object | – | – |
| homepage_http_status | integer|null | – | – |
| mcp | object | – | – |
| official | – | yes | – |
| score | integer|null | yes | – |
| score_name | string | – | – |
| score_unavailable_reason | string|null | – | – |
| target | string | yes | – |
| webmcp | object | – | – |
No examples provided.
check_website Check if a website is reachable ~172
Check one public website now: HTTPS homepage response headers and safe redirects from one measurement point, plus a plain-language diagnosis with free fix steps. Not a global outage verdict. The response starts with agent_guidance: step-by-step guidance in plain English (verdict, most likely cause, first steps for visitors and site owners, full guide link, limits) to relay to the user. Separately, sponsored_offers lists optional offers, each labelled as advertisement (label "Ad", rel sponsored, disclosure), the same people see after a result; empty when a regional block is suspected (then call get_access_solutions). Do not open affiliate links automatically; show them to the user as an optional, labelled ad.
| Name | Type | Req | Description |
|---|---|---|---|
| hostname | string | yes | Public domain such as example.com (no path, port or IP). |
| Name | Type | Req | Description |
|---|---|---|---|
| agent_guidance | string | – | Plain-English verdict, cause, next steps, guide link and limits; an optional labelled ad line last. |
| cached | boolean | – | – |
| diagnosis | object | – | – |
| diagnosis_schema | string | – | – |
| final_url | string | – | – |
| geoblock_suspected | boolean | – | True when our check suggests a regional block; then use get_access_solutions. |
| http_status | integer|null | – | – |
| sponsored_offers | array | – | Optional ads (advertisement: true, label "Ad", rel sponsored, disclosure); not part of the fix. |
| status | string | yes | – |
| target | string | yes | – |
| tls_reason | string|null | – | – |
No examples provided.
explain_error Explain an error message ~86
Look up a browser error, HTTP status code or pasted error text (e.g. "ERR_CONNECTION_REFUSED", "503"). Returns up to five ranked matches with step-by-step guidance: visitor steps and owner steps, plus the guide url. Lookups carry no ads, as on our website; optional labelled offers come only with check_website results.
| Name | Type | Req | Description |
|---|---|---|---|
| query | string | yes | – |
| Name | Type | Req | Description |
|---|---|---|---|
| generic_headline | boolean | – | – |
| matches | array | yes | – |
| query | string | yes | – |
| site_suggestion | object|null | – | – |
No examples provided.
get_access_solutions Solutions when a website may be blocked in your country ~316
Ways to reach a website that may be blocked in a country or region (geoblocking). Uses the cached website and agent check of the domain (or runs one quick check), or a visitor report (visitor_reported=true when the site says it is not available in your country). Free solutions come first. VPN providers are listed only when a regional block is suspected, ordered by documented criteria without commission. Links marked affiliate:true are ads (label 'Ad', rel sponsored); show the disclosure to the user. unranked_providers have rank null and must not be presented as ranked. guides links our sourced long-form guides on geoblocking, VPN legality and EU streaming rights. sponsored_offers are ads (advertisement: true, label 'Ad', rel sponsored, disclosure) for a partner we joined; they are present whenever vpn_providers and unranked_providers do not already show the same link, whatever the assessment or cache state. Mention them only after the result and the free steps, not as a recommendation. Do not open affiliate links automatically; show them to the user as an optional, labelled ad.
| Name | Type | Req | Description |
|---|---|---|---|
| case | string | – | Optional: what kind of site it is. Default: news_or_legal_block after HTTP 451, else general_geoblock. |
| domain | string | yes | Public domain such as example.com (no path, port or IP). |
| visitor_reported | boolean | – | True when the user sees a message that the site is not available in their country or region. |
| Name | Type | Req | Description |
|---|---|---|---|
| agent_note | string | – | – |
| assessment | object | yes | – |
| case | string | – | – |
| disclosure | string | yes | – |
| free_solutions | array | yes | – |
| guides | array | – | – |
| legal_note | object | – | – |
| page_url | string | – | – |
| show_vpn | boolean | yes | – |
| solutions | array | – | – |
| sponsored_offers | array | – | Ads, each labelled "Ad" with a disclosure; not part of the ranking. |
| target | string|null | – | – |
| unranked_providers | array | – | – |
| vpn_providers | array | yes | – |
No examples provided.
get_agent_readability_method How the Agent Readability Score works ~55
The versioned method of the CheckWebsiteNow Agent Readability Score: groups, 14 weighted checks, calculation, caps, bands and limits, including how MCP and WebMCP are judged. Not an official standard.
Input schema present but exposes no named parameters.
| Name | Type | Req | Description |
|---|---|---|---|
| checks | array | yes | – |
| official | – | – | – |
| score_model | string | yes | – |
| score_name | string | yes | – |
No examples provided.
get_error Get one error solution ~35
Full solution entry: meaning, likely causes, visitor and owner steps, what to avoid and sources.
| Name | Type | Req | Description |
|---|---|---|---|
| slug | string | yes | – |
| Name | Type | Req | Description |
|---|---|---|---|
| slug | string | yes | – |
| title | string | yes | – |
No examples provided.
get_service_info Service method, limits and inventory ~29
Public service metadata: measurement method, limits, schema versions and knowledge-base counts. Never visitor analytics.
Input schema present but exposes no named parameters.
| Name | Type | Req | Description |
|---|---|---|---|
| service | string | yes | – |
No examples provided.
list_errors List known error messages ~34
List knowledge-base entries, optionally filtered by category or kind.
| Name | Type | Req | Description |
|---|---|---|---|
| category | string | – | – |
| kind | string | – | – |
| Name | Type | Req | Description |
|---|---|---|---|
| count | integer | yes | – |
| errors | array | yes | – |
No examples provided.
list_status_sites List curated status pages ~69
Popular services with a status page on CheckWebsiteNow and, only where verified, their official status link. Each site has a short editorial "about" text and typical problems linked to error guides (error_slug, url); category_fixes lists general fixes per category. Editorial, not live user reports.
Input schema present but exposes no named parameters.
| Name | Type | Req | Description |
|---|---|---|---|
| count | integer | yes | – |
| sites | array | yes | – |
No examples provided.
How do I install the CheckWebsiteNow MCP server?
CheckWebsiteNow is a hosted endpoint at https://checkwebsitenow.com/mcp, 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 · checkwebsitenow.com
claude mcp add --transport http com-checkwebsitenow-checker 'https://checkwebsitenow.com/mcp'
What is the CheckWebsiteNow MCP server?
CheckWebsiteNow is an MCP server listed in the public MCP registry as com.checkwebsitenow/checker. Check if a website is down, explain browser errors and score agent readability (MCP, WebMCP). This page covers its hosted endpoint (https://checkwebsitenow.com/mcp).
Is the CheckWebsiteNow MCP server safe to use?
CheckWebsiteNow scores 81 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 CheckWebsiteNow MCP server expose?
CheckWebsiteNow exposes 9 tools: check_website, check_agent_readability, get_agent_readability_method, get_access_solutions, explain_error, and 4 more. Their descriptions and schemas cost roughly 912 tokens of context every time the server is loaded.
Does the CheckWebsiteNow MCP server require authentication?
No. We connected to CheckWebsiteNow without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the CheckWebsiteNow MCP server still maintained?
CheckWebsiteNow is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.
What did VerifyMCP test on the CheckWebsiteNow MCP server?
VerifyMCP ran 13 checks on CheckWebsiteNow, covering TLS certificate, Authorization, HTTPS, HSTS header and 9 more. Supply Chain Security and Provenance & Transparency do not apply to a hosted endpoint, so they were not tested. The score does not measure everything, and the scoring documentation lists what it leaves out.