# UK Business Calendar MCP (remote · uk-business-calendar-mcp.donniertf.workers.dev)

UK working days, bank holidays, HMRC and Companies House deadlines.

- Trust score: 57/100 (low)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `uk-business-calendar-mcp.donniertf.workers.dev`: 57/100 (this document), [markdown](https://verifymcp.io/servers/donniertf-hub-uk-business-calendar-mcp/uk-business-calendar-mcp.md), [page](https://verifymcp.io/servers/donniertf-hub-uk-business-calendar-mcp/uk-business-calendar-mcp)

## Channel facts

- Endpoint: `https://uk-business-calendar-mcp.donniertf.workers.dev/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.1.0`

## Trust breakdown

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. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-11-05.

- **Endpoint Security**: 46/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not fully verified: no authorisation is required to call this server, and 10 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.
  - HTTPS check failed: the endpoint is reachable over plaintext HTTP.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 63/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 909 tokens (~90/item across 10 items; 10 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 23/100
  - Stability observed for 7 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 80/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 39% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 10 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 11 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 40/100
  - Spec-recency check failed: implements MCP spec 2025-03-26; the latest is 2026-07-28.

## Install

### How do I install the UK Business Calendar MCP server?

UK Business Calendar MCP is a hosted endpoint at https://uk-business-calendar-mcp.donniertf.workers.dev/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.

### Claude

```bash
claude mcp add --transport http donniertf-hub-uk-business-calendar-mcp 'https://uk-business-calendar-mcp.donniertf.workers.dev/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "donniertf-hub-uk-business-calendar-mcp": {
      "url": "https://uk-business-calendar-mcp.donniertf.workers.dev/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "donniertf-hub-uk-business-calendar-mcp": {
      "type": "http",
      "url": "https://uk-business-calendar-mcp.donniertf.workers.dev/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.donniertf-hub-uk-business-calendar-mcp]
url = "https://uk-business-calendar-mcp.donniertf.workers.dev/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "donniertf-hub-uk-business-calendar-mcp": {
      "type": "remote",
      "url": "https://uk-business-calendar-mcp.donniertf.workers.dev/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add donniertf-hub-uk-business-calendar-mcp --url 'https://uk-business-calendar-mcp.donniertf.workers.dev/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  donniertf-hub-uk-business-calendar-mcp:
    url: "https://uk-business-calendar-mcp.donniertf.workers.dev/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "donniertf-hub-uk-business-calendar-mcp": {
      "Transport": "http",
      "Url": "https://uk-business-calendar-mcp.donniertf.workers.dev/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add donniertf-hub-uk-business-calendar-mcp -t streamable-http -u 'https://uk-business-calendar-mcp.donniertf.workers.dev/mcp'
```

### Other

```json
{
  "mcpServers": {
    "donniertf-hub-uk-business-calendar-mcp": {
      "type": "http",
      "url": "https://uk-business-calendar-mcp.donniertf.workers.dev/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-11-04 (score 57, +1)

No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-11-02 (score 56, +1)

No change was recorded against any check on this day. Stability & Change Management went from 10 to 13. That category is still filling its 30-day observation window: 3 days of observed history at the previous scan, 4 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-31 (score 55, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-30 (score 54, 0)

- [functional improvement] Stability: unverified → 0.03

### 2026-10-29 (score 54)

First indexed and scored.

## MCP tools (10)

### `next_bank_holidays` (~51 tokens)

FREE. Next 3 UK bank holidays for a nation, plus whether today is a working day.

Input parameters:

- `region` (string): england (default), wales, scotland, northern-ireland

### `working_days` (~82 tokens)

PRO. Count UK working days between two dates (excludes weekends + bank holidays for the nation).

Input parameters:

- `access_token` (string): Subscriber token from /success (or Authorization: Bearer)
- `from` (string, required)
- `region` (string): england (default), wales, scotland, northern-ireland
- `to` (string, required)

### `due_date` (~105 tokens)

PRO. Invoice/contract due date: add N working days or N calendar days (rolled to next working day) to a date. Includes Late Payment Act 30-day default.

Input parameters:

- `access_token` (string): Subscriber token from /success (or Authorization: Bearer)
- `days` (number, required)
- `from` (string)
- `region` (string): england (default), wales, scotland, northern-ireland
- `working` (boolean)

### `tax_deadlines` (~76 tokens)

PRO. Upcoming HMRC and Companies House deadlines for the next N months; add company_year_end for Corporation Tax, CT600 and accounts dates.

Input parameters:

- `access_token` (string): Subscriber token from /success (or Authorization: Bearer)
- `company_year_end` (string): YYYY-MM-DD
- `months` (number)

### `month_planner` (~87 tokens)

PRO. For a month: working days count, bank holidays, payday suggestions (last working day / 25th rolled back) and deadlines.

Input parameters:

- `access_token` (string): Subscriber token from /success (or Authorization: Bearer)
- `month` (string, required): YYYY-MM
- `region` (string): england (default), wales, scotland, northern-ireland

### `news_quick` (~49 tokens)

FREE. Quick news & facts lookup for a topic: top Wikipedia matches (with summary) and top Hacker News stories from the last 30 days. No key.

Input parameters:

- `query` (string, required)

### `news_search` (~135 tokens)

PRO ($0.01). Search worldwide online news (GDELT DOC 2.0, 65+ languages) for a topic: latest articles with headline, URL, outlet domain, time seen and source country. Options: days (1-90, default 7), uk_only, lang (e.g. english), max (≤50).

Input parameters:

- `access_token` (string): Subscriber token from /success (or Authorization: Bearer)
- `days` (number)
- `lang` (string)
- `max` (number)
- `query` (string, required)
- `uk_only` (boolean)

### `tech_news_search` (~120 tokens)

PRO ($0.01). Search Hacker News stories (via Algolia) for a company, product or topic: title, link, points, comments. Options: days (default 30), min_points, sort ('relevance' or 'recent'), max (≤30).

Input parameters:

- `access_token` (string): Subscriber token from /success (or Authorization: Bearer)
- `days` (number)
- `max` (number)
- `min_points` (number)
- `query` (string, required)
- `sort` (string)

### `facts_search` (~70 tokens)

PRO ($0.01). Wikipedia search for background facts: up to 10 matching articles with snippets, and summaries for the top 3.

Input parameters:

- `access_token` (string): Subscriber token from /success (or Authorization: Bearer)
- `max` (number)
- `query` (string, required)

### `news_briefing` (~85 tokens)

PRO ($0.01). One-call briefing on a company or topic: latest GDELT news (optionally UK outlets only), Hacker News discussion and Wikipedia background.

Input parameters:

- `access_token` (string): Subscriber token from /success (or Authorization: Bearer)
- `days` (number)
- `query` (string, required)
- `uk_only` (boolean)

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/donniertf-hub-uk-business-calendar-mcp/uk-business-calendar-mcp#diagnostics

## Score history

- 2026-11-05: 57
- 2026-11-04: 57
- 2026-11-03: 56
- 2026-11-02: 56
- 2026-11-01: 55
- 2026-10-31: 55
- 2026-10-30: 54
- 2026-10-29: 54

## Common questions

### What is the UK Business Calendar MCP server?

UK Business Calendar MCP is listed in the public MCP registry as io.github.donniertf-hub/uk-business-calendar-mcp. UK working days, bank holidays, HMRC and Companies House deadlines. This page covers its hosted endpoint (https://uk-business-calendar-mcp.donniertf.workers.dev/mcp).

### Is the UK Business Calendar MCP server safe to use?

UK Business Calendar MCP scores 57 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 UK Business Calendar MCP server expose?

UK Business Calendar MCP exposes 10 tools: next_bank_holidays, working_days, due_date, tax_deadlines, month_planner, and 5 more. Their descriptions and schemas cost roughly 860 tokens of context every time the server is loaded.

### Does the UK Business Calendar MCP server require authentication?

No. We connected to UK Business Calendar MCP without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the UK Business Calendar MCP server still maintained?

UK Business Calendar MCP 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.

## Links

- Remote endpoint: https://uk-business-calendar-mcp.donniertf.workers.dev/mcp
- Repository: https://github.com/donniertf-hub/uk-mcp-fleet
- Website: https://uk-business-calendar-mcp.donniertf.workers.dev/
- Changelog RSS feed: https://verifymcp.io/servers/donniertf-hub-uk-business-calendar-mcp/uk-business-calendar-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/donniertf-hub-uk-business-calendar-mcp/uk-business-calendar-mcp.json
- HTML version of this page: https://verifymcp.io/servers/donniertf-hub-uk-business-calendar-mcp/uk-business-calendar-mcp