PromptFiling — UK company deadlines
REMOTE · MCP.PROMPTFILING.CO.UK · SCANNED SEP 20
Free Companies House deadline checks for UK companies: due dates, penalties, dormancy signals.
Available components
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 Security66
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation not fully verified: no authorisation is required to call this server, and 2 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe. See how to fix → View diagnostics → Unverified
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC is configured correctly; the domain's records validate against the full chain to the root. View diagnostics → Pass
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability82
- AI-judged instruction clarity (excellent).Pass
- Tool/resource definitions use about 233 tokens (~116/item across 2 items; 2 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management100
- No destabilizing schema changes in the last 30 days.Pass
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 2 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 3 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities60
- Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28. See how to fix → Fail
How do I install the PromptFiling — UK company deadlines MCP server?
PromptFiling — UK company deadlines is a hosted endpoint at https://mcp.promptfiling.co.uk/, 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.promptfiling.co.uk
claude mcp add --transport http uk-co-promptfiling-deadlines 'https://mcp.promptfiling.co.uk/'
{
"mcpServers": {
"uk-co-promptfiling-deadlines": {
"url": "https://mcp.promptfiling.co.uk/"
}
}
} {
"servers": {
"uk-co-promptfiling-deadlines": {
"type": "http",
"url": "https://mcp.promptfiling.co.uk/"
}
}
} [mcp_servers.uk-co-promptfiling-deadlines] url = "https://mcp.promptfiling.co.uk/"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"uk-co-promptfiling-deadlines": {
"type": "remote",
"url": "https://mcp.promptfiling.co.uk/",
"enabled": true
}
}
} openclaw mcp add uk-co-promptfiling-deadlines --url 'https://mcp.promptfiling.co.uk/' --transport streamable-http
mcp_servers:
uk-co-promptfiling-deadlines:
url: "https://mcp.promptfiling.co.uk/" {
"McpServers": {
"uk-co-promptfiling-deadlines": {
"Transport": "http",
"Url": "https://mcp.promptfiling.co.uk/"
}
}
} assistant mcp add uk-co-promptfiling-deadlines -t streamable-http -u 'https://mcp.promptfiling.co.uk/'
{
"mcpServers": {
"uk-co-promptfiling-deadlines": {
"type": "http",
"url": "https://mcp.promptfiling.co.uk/"
}
}
} The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.
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.
- 20 Sept 26 +1
- Stability: 0.97 → pass security
- 19 Sept 26 0
- Server version: 1.41.00 → 1.42.00 functional
- 18 Sept 26 +1
- Server version: 1.39.01 → 1.41.00 functional
- 17 Sept 26 0
- Server version: 1.37.00 → 1.39.01 functional
- 16 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 83 to 87. That category is still filling its 30-day observation window: 25 days of observed history at the previous scan, 26 at this one. The score rises as the window fills, whether or not the server changes.
- 14 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 77 to 80. That category is still filling its 30-day observation window: 23 days of observed history at the previous scan, 24 at this one. The score rises as the window fills, whether or not the server changes.
- 12 Sept 26 +2
- DNSSEC: fail → pass ▲ security
- 11 Sept 26 0
- Server version: 1.36.00 → 1.37.00 functional
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 20 Sept 2026 · Probed https://mcp.promptfiling.co.uk/
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=promptfiling.co.uk | CN=WE1,O=Google Trust Services,C=US | 14 Aug 2026 | 12 Nov 2026 | ECDSA 256 | ECDSA-SHA256 | 8699dc1eebf176ad1390c3ad25ff4a3f |
| SANs: promptfiling.co.uk, *.promptfiling.co.uk | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC secure
Validation of mcp.promptfiling.co.uk. — Secure
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| uk. | present | 43876 | 8 | Verified |
| co.uk. | present | 11810 | 8 | Verified |
| promptfiling.co.uk. | present | 2371 | 13 | Verified |
| mcp.promptfiling.co.uk. | Verified address RRset verified with the apex keys |
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 |
| content-security-policy | default-src 'self'; script-src 'self' 'unsafe-inline' https://static.cloudflareinsights.com https://www.googletagmanager.com https://challenges.cloudflare.com; style-src 'self' 'unsafe-inline'; img-src 'self' data: blob: https://*.google-analytics.com; font-src 'self' data:; connect-src 'self' https://*.supabase.co wss://*.supabase.co https://cloudflareinsights.com https://*.google-analytics.com https://*.analytics.google.com https://*.googletagmanager.com https://challenges.cloudflare.com; frame-src 'self' https://challenges.cloudflare.com; frame-ancestors 'none'; base-uri 'self'; form-action 'self'; object-src 'none'; upgrade-insecure-requests |
| x-content-type-options | nosniff |
| x-frame-options | DENY |
| referrer-policy | strict-origin-when-cross-origin |
| permissions-policy | camera=(self), 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.promptfiling.co.uk/ | Verified | 200 | |
| http (plaintext) | http://mcp.promptfiling.co.uk/ | HTTPS enforced | 308 | https://mcp.promptfiling.co.uk/ |
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_company_deadlines Check a UK company's filing deadlines ~118
Look up a UK limited company by company number (preferred — e.g. 01234567 or SC123456) or by name, and get its statutory Companies House deadlines: when annual accounts and the confirmation statement are due, days remaining, the automatic late-filing penalty for accounts, and dormancy signals from the public register. Free, no account; data from the official Companies House register.
| Name | Type | Req | Description |
|---|---|---|---|
| query | string | yes | Company number (8 digits, or 2 letters + 6 digits) or a company name to search |
No output schema declared.
No examples provided.
uk_late_filing_penalties UK late-filing penalty table ~53
The current Companies House late-filing penalty bands for a private company's annual accounts, the doubling rule for two late years running, and what missing a confirmation statement risks. Static reference — no lookup performed.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
What is the PromptFiling — UK company deadlines MCP server?
PromptFiling — UK company deadlines is an MCP server listed in the public MCP registry as uk.co.promptfiling/deadlines. Free Companies House deadline checks for UK companies: due dates, penalties, dormancy signals. This page covers its hosted endpoint (https://mcp.promptfiling.co.uk/).
Is the PromptFiling — UK company deadlines MCP server safe to use?
PromptFiling — UK company deadlines scores 82 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 PromptFiling — UK company deadlines MCP server expose?
PromptFiling — UK company deadlines exposes 2 tools: check_company_deadlines, uk_late_filing_penalties. Their descriptions and schemas cost roughly 171 tokens of context every time the server is loaded.
Does the PromptFiling — UK company deadlines MCP server require authentication?
No. We connected to PromptFiling — UK company deadlines without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the PromptFiling — UK company deadlines MCP server still maintained?
PromptFiling — UK company deadlines is still listed as active in the MCP registry. We last reached this channel on 20 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.