# Türkiye Business Days & Public Holidays (remote · foster-mcp.esakiz.workers.dev)

Türkiye public holidays (incl. half-day eves, Diyanet dates) and business-day math, 2022–2035.

- Trust score: 70/100 (medium)
- Change this week: +4
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `foster-mcp.esakiz.workers.dev`: 70/100 (this document), [markdown](https://verifymcp.io/servers/foster-ops-turkey-business-calendar/calendar-mcp.md), [page](https://verifymcp.io/servers/foster-ops-turkey-business-calendar/calendar-mcp)

## Channel facts

- Endpoint: `https://foster-mcp.esakiz.workers.dev/calendar/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 2026-11-05.

- **Endpoint Security**: 63/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - 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.
  - HTTPS enforcement could not be verified: the plaintext port answered with HTTP 405, which proves neither a plaintext path nor enforcement.
  - 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**: 71/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 671 tokens (~167/item across 4 items; 4 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 27/100
  - Stability observed for 8 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 4 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 4 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a current MCP spec version (2026-07-28).

## Install

### How do I install the Türkiye Business Days & Public Holidays MCP server?

Türkiye Business Days & Public Holidays is a hosted endpoint at https://foster-mcp.esakiz.workers.dev/calendar/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 foster-ops-turkey-business-calendar 'https://foster-mcp.esakiz.workers.dev/calendar/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "foster-ops-turkey-business-calendar": {
      "url": "https://foster-mcp.esakiz.workers.dev/calendar/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "foster-ops-turkey-business-calendar": {
      "type": "http",
      "url": "https://foster-mcp.esakiz.workers.dev/calendar/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.foster-ops-turkey-business-calendar]
url = "https://foster-mcp.esakiz.workers.dev/calendar/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "foster-ops-turkey-business-calendar": {
      "type": "remote",
      "url": "https://foster-mcp.esakiz.workers.dev/calendar/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add foster-ops-turkey-business-calendar --url 'https://foster-mcp.esakiz.workers.dev/calendar/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  foster-ops-turkey-business-calendar:
    url: "https://foster-mcp.esakiz.workers.dev/calendar/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "foster-ops-turkey-business-calendar": {
      "Transport": "http",
      "Url": "https://foster-mcp.esakiz.workers.dev/calendar/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add foster-ops-turkey-business-calendar -t streamable-http -u 'https://foster-mcp.esakiz.workers.dev/calendar/mcp'
```

### Other

```json
{
  "mcpServers": {
    "foster-ops-turkey-business-calendar": {
      "type": "http",
      "url": "https://foster-mcp.esakiz.workers.dev/calendar/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.

### 2026-11-05 (score 70, +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.

### 2026-11-03 (score 69, +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.

### 2026-11-01 (score 68, +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.

### 2026-10-30 (score 67, +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.

### 2026-10-29 (score 66, 0)

- [functional improvement] Stability: unverified → 0.03

### 2026-10-28 (score 66)

First indexed and scored.

## MCP tools (4)

### `list_holidays` (~116 tokens)

List Türkiye public holidays

Lists all public holidays of a year in Türkiye, with Turkish/English names, type, half-day eves and announced administrative leave. Türkiye's official calendar (Law 2429 holidays plus Diyanet's religious holidays), covering 2022-01-01 to 2035-12-31. Business days are Monday–Friday minus official holidays. Eves of Republic Day and the religious holidays are half days (holiday from 13:00).

Input parameters:

- `year` (integer, required): Year, 2022–2035

Output parameters:

- `administrative_leave` (array)
- `disclaimer` (string)
- `full_days_on_weekdays` (integer)
- `holidays` (array)
- `notes` (array)
- `source` (string)
- `year` (integer)

### `check_business_day` (~173 tokens)

Is this a business day in Türkiye?

Tells whether a date is a business day in Türkiye, which holiday falls on it and whether only the afternoon is off. Türkiye's official calendar (Law 2429 holidays plus Diyanet's religious holidays), covering 2022-01-01 to 2035-12-31. Business days are Monday–Friday minus official holidays. Eves of Republic Day and the religious holidays are half days (holiday from 13:00).

Input parameters:

- `calendar` (string): standard: general business days. public_sector: also excludes announced administrative leave (from 2026). tcmb: days the central bank publishes exchange rates (no bulletin on eves).
- `date` (string, required): Date, YYYY-MM-DD
- `half_days` (string): Count half-day eves as working days or as holidays.

Output parameters:

- `administrative_leave` (array)
- `business_day` (boolean)
- `calendar` (string)
- `date` (string)
- `day_off` (string)
- `disclaimer` (string)
- `half_days` (string)
- `holidays` (array)
- `source` (string)
- `weekday` (string)

### `add_business_days` (~209 tokens)

Add business days (Türkiye)

Returns the date that is N business days after (or before, if N is negative) a start date in Türkiye, e.g. for payment terms or legal deadlines. The start date is not counted. Türkiye's official calendar (Law 2429 holidays plus Diyanet's religious holidays), covering 2022-01-01 to 2035-12-31. Business days are Monday–Friday minus official holidays. Eves of Republic Day and the religious holidays are half days (holiday from 13:00).

Input parameters:

- `calendar` (string): standard: general business days. public_sector: also excludes announced administrative leave (from 2026). tcmb: days the central bank publishes exchange rates (no bulletin on eves).
- `date` (string, required): Start date, YYYY-MM-DD
- `days` (integer, required): Business days to add; negative to go back; non-zero
- `half_days` (string): Count half-day eves as working days or as holidays.

Output parameters:

- `business_days` (integer)
- `calendar` (string)
- `disclaimer` (string)
- `half_days` (string)
- `result_date` (string)
- `result_weekday` (string)
- `rule` (string)
- `source` (string)
- `start_date` (string)

### `count_business_days` (~173 tokens)

Count business days (Türkiye)

Counts business days between two dates in Türkiye, both dates included. Türkiye's official calendar (Law 2429 holidays plus Diyanet's religious holidays), covering 2022-01-01 to 2035-12-31. Business days are Monday–Friday minus official holidays. Eves of Republic Day and the religious holidays are half days (holiday from 13:00).

Input parameters:

- `calendar` (string): standard: general business days. public_sector: also excludes announced administrative leave (from 2026). tcmb: days the central bank publishes exchange rates (no bulletin on eves).
- `from` (string, required): Date, YYYY-MM-DD
- `half_days` (string): Count half-day eves as working days or as holidays.
- `to` (string, required): Date, YYYY-MM-DD

Output parameters:

- `business_days` (integer)
- `calendar` (string)
- `calendar_days` (integer)
- `disclaimer` (string)
- `from` (string)
- `half_days` (string)
- `rule` (string)
- `source` (string)
- `to` (string)

## Diagnostics

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

## Score history

- 2026-11-05: 70
- 2026-11-04: 69
- 2026-11-03: 69
- 2026-11-02: 68
- 2026-11-01: 68
- 2026-10-31: 67
- 2026-10-30: 67
- 2026-10-29: 66
- 2026-10-28: 66

## Common questions

### What is the Türkiye Business Days & Public Holidays MCP server?

Türkiye Business Days & Public Holidays is an MCP server listed in the public MCP registry as io.github.foster-ops/turkey-business-calendar. Türkiye public holidays (incl. half-day eves, Diyanet dates) and business-day math, 2022–2035. This page covers its hosted endpoint (https://foster-mcp.esakiz.workers.dev/calendar/mcp).

### Is the Türkiye Business Days & Public Holidays MCP server safe to use?

Türkiye Business Days & Public Holidays scores 70 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 Türkiye Business Days & Public Holidays MCP server expose?

Türkiye Business Days & Public Holidays exposes 4 tools: list_holidays, check_business_day, add_business_days, count_business_days. Their descriptions and schemas cost roughly 671 tokens of context every time the server is loaded.

### Does the Türkiye Business Days & Public Holidays MCP server require authentication?

No. We connected to Türkiye Business Days & Public Holidays without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Türkiye Business Days & Public Holidays MCP server still maintained?

Türkiye Business Days & Public Holidays 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 Türkiye Business Days & Public Holidays MCP server?

VerifyMCP ran 12 checks on Türkiye Business Days & Public Holidays, covering TLS certificate, Authorization, HSTS header, DNSSEC and 8 more. One item could not be completed, a gap on our side rather than a finding about Türkiye Business Days & Public Holidays: HTTPS. 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.

## Links

- Remote endpoint: https://foster-mcp.esakiz.workers.dev/calendar/mcp
- Website: https://foster-mcp.esakiz.workers.dev/llms.txt
- Changelog RSS feed: https://verifymcp.io/servers/foster-ops-turkey-business-calendar/calendar-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/foster-ops-turkey-business-calendar/calendar-mcp/changelog.json
- Trust report (JSON): https://verifymcp.io/servers/foster-ops-turkey-business-calendar/calendar-mcp.json
- HTML version of this page: https://verifymcp.io/servers/foster-ops-turkey-business-calendar/calendar-mcp