# uk.co.corptaxcalculator/site (remote · corptaxcalculator.co.uk)

Corp Tax Calculator: the site's own MCP server — dataset, enquiry (enquiry = a human handoff,...

- Trust score: 69/100 (medium)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-20

## Components

- remote · `corptaxcalculator.co.uk`: 69/100 (this document), [markdown](https://verifymcp.io/servers/uk-co-corptaxcalculator-site/corptaxcalculator.md), [page](https://verifymcp.io/servers/uk-co-corptaxcalculator-site/corptaxcalculator)

## Channel facts

- Endpoint: `https://corptaxcalculator.co.uk/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## 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 2026-09-20.

- **Endpoint Security**: 57/100
  - 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 is enforced; there's no plaintext access path.
  - 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**: 87/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (excellent).
  - Tool/resource definitions use about 1075 tokens (~97/item across 11 items; 10 tools + 1 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 33/100
  - Stability observed for 10 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 79/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 38% 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 12 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the uk.co.corptaxcalculator/site MCP server?

uk.co.corptaxcalculator/site is a hosted endpoint at https://corptaxcalculator.co.uk/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 uk-co-corptaxcalculator-site 'https://corptaxcalculator.co.uk/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "uk-co-corptaxcalculator-site": {
      "url": "https://corptaxcalculator.co.uk/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "uk-co-corptaxcalculator-site": {
      "type": "http",
      "url": "https://corptaxcalculator.co.uk/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.uk-co-corptaxcalculator-site]
url = "https://corptaxcalculator.co.uk/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "uk-co-corptaxcalculator-site": {
      "type": "remote",
      "url": "https://corptaxcalculator.co.uk/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add uk-co-corptaxcalculator-site --url 'https://corptaxcalculator.co.uk/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  uk-co-corptaxcalculator-site:
    url: "https://corptaxcalculator.co.uk/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "uk-co-corptaxcalculator-site": {
      "Transport": "http",
      "Url": "https://corptaxcalculator.co.uk/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add uk-co-corptaxcalculator-site -t streamable-http -u 'https://corptaxcalculator.co.uk/mcp'
```

### Other

```json
{
  "mcpServers": {
    "uk-co-corptaxcalculator-site": {
      "type": "http",
      "url": "https://corptaxcalculator.co.uk/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.

### 2026-09-18 (score 69, +1)

No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-16 (score 68, +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.

### 2026-09-14 (score 67, +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.

### 2026-09-13 (score 66, +5)

- [security improvement] HTTPS: fail → pass

### 2026-09-11 (score 61, +1)

- [functional improvement] Stability: unverified → 0.03

### 2026-09-10 (score 60)

First indexed and scored.

## MCP tools (10)

### `dataset_columns` (~39 tokens)

Dataset columns and shape

The columns, which of them are numeric, the row count and the provenance banner of the Corp Tax Calculator dataset. Call this first to learn the schema.

### `dataset_search` (~51 tokens)

Search the dataset

Rows of the Corp Tax Calculator dataset whose cells contain the query (case-insensitive), up to 50.

Input parameters:

- `limit` (integer)
- `query` (string, required): text to look for in any cell

### `dataset_row` (~42 tokens)

Look a row up by an exact key

The rows of the Corp Tax Calculator dataset where a column equals a value exactly (case-insensitive).

Input parameters:

- `column` (string, required)
- `value` (string, required)

### `dataset_compare` (~52 tokens)

Compare rows side by side

The rows of the Corp Tax Calculator dataset whose column is any of the given values, in the order given — for "X vs Y" questions.

Input parameters:

- `column` (string, required)
- `values` (array, required)

### `dataset_stats` (~54 tokens)

Summary statistics for a numeric column

count, min, max, mean, median and sum of a numeric column of the Corp Tax Calculator dataset (grouping commas and currency are handled; non-numeric rows are excluded and counted).

Input parameters:

- `column` (string, required)

### `dataset_top` (~65 tokens)

Rank rows by a numeric column

The highest (or lowest) rows of the Corp Tax Calculator dataset by a numeric column — "which is the most/least X".

Input parameters:

- `ascending` (boolean): true for the lowest first; default highest first
- `column` (string, required)
- `limit` (integer)

### `dataset_provenance` (~39 tokens)

Where this data comes from, and how to cite it

The source, the date it was computed, the licence and the citation for the Corp Tax Calculator dataset. Read this to attribute a figure correctly.

### `enquiry_describe` (~69 tokens)

What you get: an ENQUIRY with a human (not a purchase, not a guaranteed quote)

Read first. States plainly what submit_enquiry does on Corp Tax Calculator: it starts an enquiry with human providers who quote directly. Nothing is bought, ordered or paid; no quote is guaranteed; it is free. Also returns who receives the details, the consent wording, and how the person confirms.

### `enquiry_fields` (~48 tokens)

The questions the enquiry asks

Every field of the Corp Tax Calculator enquiry: key, label, type, whether required, help text and the allowed options where there are any. Pass answers to submit_enquiry keyed by field key.

### `submit_enquiry` (~231 tokens)

Submit an ENQUIRY to human providers (two steps; not a purchase)

Submits an enquiry to Corp Tax Calculator — NOT a purchase, NOT a guaranteed quote. Step 1: call with the answers (keyed by field key from enquiry_fields) and consent=true; it validates and returns a summary, the consent line and a confirmation token — show the person the summary and the consent line. Step 2: only if the person agrees, call again with the same answers, consent=true and the confirmation token; the enquiry is then submitted, and the person receives an email with a link they must click before any provider sees it. Consent means the person has read and agreed to: "By submitting you agree Corp Tax Calculator shares your details with R&D tax and corporation tax firms who may contact you."

Input parameters:

- `answers` (object, required): the person's answers, keyed by field key
- `confirmation` (string): the confirmation token from step 1, after the person has approved the summary
- `consent` (boolean, required): true only when the person has agreed to: By submitting you agree Corp Tax Calculator shares your details with R&D tax and corporation tax firms who may contact you.

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/uk-co-corptaxcalculator-site/corptaxcalculator#diagnostics

## Score history

- 2026-09-20: 69
- 2026-09-19: 69
- 2026-09-18: 69
- 2026-09-17: 68
- 2026-09-16: 68
- 2026-09-15: 67
- 2026-09-14: 67
- 2026-09-13: 66
- 2026-09-12: 61
- 2026-09-11: 61
- 2026-09-10: 60

## Common questions

### What is the uk.co.corptaxcalculator/site MCP server?

uk.co.corptaxcalculator/site is an MCP server listed in the public MCP registry as uk.co.corptaxcalculator/site. Corp Tax Calculator: the site's own MCP server, dataset, enquiry (enquiry = a human handoff,... This page covers its hosted endpoint (https://corptaxcalculator.co.uk/mcp).

### Is the uk.co.corptaxcalculator/site MCP server safe to use?

uk.co.corptaxcalculator/site scores 69 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.co.corptaxcalculator/site MCP server expose?

uk.co.corptaxcalculator/site exposes 10 tools: dataset_columns, dataset_search, dataset_row, dataset_compare, dataset_stats, and 5 more. Their descriptions and schemas cost roughly 690 tokens of context every time the server is loaded.

### Does the uk.co.corptaxcalculator/site MCP server require authentication?

No. We connected to uk.co.corptaxcalculator/site without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the uk.co.corptaxcalculator/site MCP server still maintained?

uk.co.corptaxcalculator/site 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.

## Links

- Remote endpoint: https://corptaxcalculator.co.uk/mcp
- Repository: https://github.com/joeetdev/venture-estate
- Website: https://corptaxcalculator.co.uk/
- Changelog RSS feed: https://verifymcp.io/servers/uk-co-corptaxcalculator-site/corptaxcalculator.xml
- Changelog JSON feed: https://verifymcp.io/servers/uk-co-corptaxcalculator-site/corptaxcalculator.json
- HTML version of this page: https://verifymcp.io/servers/uk-co-corptaxcalculator-site/corptaxcalculator