# Zovo Date Calculator (remote · date-calculator.zovo.one)

Days between dates & workdays

- Trust score: 73/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-23

## Components

- remote · `date-calculator.zovo.one`: 73/100 (this document), [markdown](https://verifymcp.io/servers/theluckystrike-date-calculator/date-calculator.md), [page](https://verifymcp.io/servers/theluckystrike-date-calculator/date-calculator)

## Channel facts

- Endpoint: `https://date-calculator.zovo.one/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 2026-10-23.

- **Endpoint Security**: 80/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - 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**: 72/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 1429 tokens (~357/item across 4 items; 3 tools + 1 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 3/100
  - Stability observed for 1 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
  - Structured output schemas are declared (100% of tools); any adoption earns full credit.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 3 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 5 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.
  - Supports UI / widget rendering.

## Install

### How do I install the Zovo Date Calculator MCP server?

Zovo Date Calculator is a hosted endpoint at https://date-calculator.zovo.one/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 theluckystrike-date-calculator 'https://date-calculator.zovo.one/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "theluckystrike-date-calculator": {
      "url": "https://date-calculator.zovo.one/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "theluckystrike-date-calculator": {
      "type": "http",
      "url": "https://date-calculator.zovo.one/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.theluckystrike-date-calculator]
url = "https://date-calculator.zovo.one/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "theluckystrike-date-calculator": {
      "type": "remote",
      "url": "https://date-calculator.zovo.one/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add theluckystrike-date-calculator --url 'https://date-calculator.zovo.one/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  theluckystrike-date-calculator:
    url: "https://date-calculator.zovo.one/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "theluckystrike-date-calculator": {
      "Transport": "http",
      "Url": "https://date-calculator.zovo.one/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add theluckystrike-date-calculator -t streamable-http -u 'https://date-calculator.zovo.one/mcp'
```

### Other

```json
{
  "mcpServers": {
    "theluckystrike-date-calculator": {
      "type": "http",
      "url": "https://date-calculator.zovo.one/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.

### 2026-10-23 (score 73, 0)

- [functional improvement] Stability: unverified → 0.03

### 2026-10-22 (score 73)

First indexed and scored.

## MCP tools (3)

### `count_days_between` (~516 tokens)

Count days between dates

Use this when the user asks how many days are between two dates (days between dates, count days, date calculator), how many business days or working days are between two dates, or days between dates excluding weekends and public holidays for a country or US state. Returns calendar days, weeks and days, years/months/days, business days, and the holidays skipped by name. The start date is counted; set include_end_date=true to also count the end date (Excel NETWORKDAYS style). Does not handle times of day or time zones. Holidays that fall on a weekend are not double-counted, and their observed weekday off (for example US Independence Day 2026 on Saturday is observed Friday July 3) is skipped as a holiday. Results are informational: legal deadlines may have special rules such as court holidays. Do not use for writing SQL or spreadsheet formulas.

Input parameters:

- `country` (string): Country for public holidays as an ISO 3166 two-letter code, e.g. US, GB, DE, PL, AU, CA, IN. Omit to skip holidays (weekends only).
- `end` (string, required): Second date, e.g. 2027-01-15. Also accepts "January 15, 2027" or "today".
- `extra_holidays` (array): Extra non-working dates to skip, e.g. company shutdown days ["2026-12-24","2026-12-31"].
- `include_bank_holidays` (boolean): Also skip bank-only closing days where the data has them (e.g. Dec 24 and Dec 31 in Germany). Default false.
- `include_end_date` (boolean): Count the end date too (adds one day), e.g. true for 'from Monday through Friday'. Default false.
- `start` (string, required): First date, preferably YYYY-MM-DD, e.g. 2026-03-03. Also accepts "March 3, 2026", "3 March 2026" or "today".
- `subdivision` (string): Optional state/province/region code within the country for local holidays, e.g. TX or CA (US states), BY (Bavaria, DE), ENG or SCT (UK), NSW (AU), ON (CA).
- `weekend_days` (array): Non-working weekdays, e.g. ["friday","saturday"]. Default saturday+sunday (friday+saturday for countries such as SA, IL, EG, QA, KW).

Output parameters:

- `business_days` (number)
- `calendar` (object)
- `calendar_days` (number)
- `end` (object)
- `holiday_source` (string)
- `holidays_on_weekends` (array)
- `holidays_skipped` (array)
- `include_end_date` (boolean)
- `inputs` (object)
- `kind` (string)
- `months` (object)
- `notes` (array)
- `region`
- `reversed` (boolean)
- `start` (object)
- `summary` (string)
- `weekend_days` (array)
- `weekend_days_count` (number)
- `weeks` (object)

### `calculate_date_offset` (~550 tokens)

Find a date N days before or after

Use this when the user wants the date that is N days or N business days (working days) before or after a date: 'what date is 90 days from today', '30 business days from Nov 3, 2026 in Germany', '10 working days before 2027-01-15', shipping or contract deadlines. Business days skip weekends and the public holidays of the given country and state, including observed weekdays for holidays that fall on a weekend (US July 4, 2027 is a Sunday, so Monday July 5 is skipped); the start date is not counted. For calendar days, roll=next_business_day moves a result that lands on a weekend or holiday to the next business day. Returns the date with its weekday, the holidays skipped, and a calendar (.ics) file. Results are informational: court and filing deadlines may have special rules (court holidays, service days). Does not handle times of day.

Input parameters:

- `country` (string): Country for public holidays as an ISO 3166 two-letter code, e.g. US, GB, DE, PL, AU, CA, IN. Omit to skip holidays (weekends only).
- `days` (integer, required): Number of days to add, e.g. 30; use a negative number such as -10 to go back.
- `extra_holidays` (array): Extra non-working dates to skip, e.g. company shutdown days ["2026-12-24","2026-12-31"].
- `include_bank_holidays` (boolean): Also skip bank-only closing days where the data has them (e.g. Dec 24 and Dec 31 in Germany). Default false.
- `roll` (string): For calendar days only: if the result is a weekend or holiday, move it, e.g. next_business_day for filing deadlines. Default none.
- `start` (string, required): Starting date, e.g. 2026-10-02, "Nov 3, 2026" or "today".
- `subdivision` (string): Optional state/province/region code within the country for local holidays, e.g. TX or CA (US states), BY (Bavaria, DE), ENG or SCT (UK), NSW (AU), ON (CA).
- `unit` (string): "calendar" counts every day (default); "business" skips weekends and holidays, e.g. business for '10 working days'.
- `weekend_days` (array): Non-working weekdays, e.g. ["friday","saturday"]. Default saturday+sunday (friday+saturday for countries such as SA, IL, EG, QA, KW).

Output parameters:

- `calendar` (object)
- `calendar_days_spanned` (number)
- `days` (number)
- `downloads` (object)
- `holiday_source` (string)
- `holidays_in_range` (array)
- `holidays_skipped` (array)
- `inputs` (object)
- `kind` (string)
- `notes` (array)
- `region`
- `result` (object)
- `result_is_business_day` (boolean)
- `roll` (string)
- `rolled_from`
- `start` (object)
- `summary` (string)
- `unit` (string)
- `weekend_days` (array)
- `weekend_days_skipped` (number)

### `list_holidays` (~268 tokens)

List public holidays

Use this when the user asks which public holidays (bank holidays) a country or a state/region has in a year, e.g. 'Poland public holidays 2026' or 'Texas state holidays 2027', usually to plan working days. Returns each holiday with date, weekday, English name and whether it falls on a weekend, including the observed weekday off when a holiday falls on a weekend, plus a CSV file. Does not include school holidays, religious observances that are not days off, or company-specific closures. Do not use to check whether a stock exchange is open.

Input parameters:

- `country` (string, required): Country as an ISO two-letter code, e.g. PL, US, GB, DE.
- `include_bank_holidays` (boolean): Also list bank-only closing days where available, e.g. Dec 24 in Germany. Default false.
- `subdivision` (string): Optional state/region code, e.g. TX (Texas), BY (Bavaria), SCT (Scotland).
- `weekend_days` (array): Weekend days used to flag holidays falling on a weekend, e.g. ["friday","saturday"]. Default from the country.
- `year` (integer): Year, e.g. 2026. Defaults to the current year.

Output parameters:

- `count` (number)
- `downloads` (object)
- `holidays` (array)
- `inputs` (object)
- `kind` (string)
- `notes` (array)
- `observed_days` (number)
- `on_weekdays` (number)
- `region`
- `summary` (string)
- `weekend_days` (array)
- `year` (number)

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/theluckystrike-date-calculator/date-calculator#diagnostics

## Score history

- 2026-10-23: 73
- 2026-10-22: 73

## Common questions

### What is the Zovo Date Calculator MCP server?

Zovo Date Calculator is an MCP server listed in the public MCP registry as io.github.theluckystrike/date-calculator. Days between dates & workdays. This page covers its hosted endpoint (https://date-calculator.zovo.one/mcp).

### Is the Zovo Date Calculator MCP server safe to use?

Zovo Date Calculator scores 73 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 Zovo Date Calculator MCP server expose?

Zovo Date Calculator exposes 3 tools: count_days_between, calculate_date_offset, list_holidays. Their descriptions and schemas cost roughly 1,334 tokens of context every time the server is loaded.

### Does the Zovo Date Calculator MCP server require authentication?

No. We connected to Zovo Date Calculator without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Zovo Date Calculator MCP server still maintained?

Zovo Date Calculator is still listed as active in the MCP registry. We last reached this channel on 23 October 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://date-calculator.zovo.one/mcp
- Website: https://date-calculator.zovo.one/
- Changelog RSS feed: https://verifymcp.io/servers/theluckystrike-date-calculator/date-calculator.xml
- Changelog JSON feed: https://verifymcp.io/servers/theluckystrike-date-calculator/date-calculator.json
- HTML version of this page: https://verifymcp.io/servers/theluckystrike-date-calculator/date-calculator