# Turkish IBAN, Tax Number & National ID Validation (remote · foster-mcp.esakiz.workers.dev)

Checksum validation of Turkish IBANs, tax numbers (VKN) and national IDs (TCKN). Nothing stored.

- Trust score: 72/100 (medium)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-06

## Components

- remote · `foster-mcp.esakiz.workers.dev`: 72/100 (this document), [markdown](https://verifymcp.io/servers/foster-ops-turkey-identifier-validation/validate-mcp.md), [page](https://verifymcp.io/servers/foster-ops-turkey-identifier-validation/validate-mcp)

## Channel facts

- Endpoint: `https://foster-mcp.esakiz.workers.dev/validate/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 2026-11-06.

- **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**: 83/100
  - AI-judged instruction clarity (excellent).
  - Tool/resource definitions use about 288 tokens (~96/item across 3 items; 3 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 30/100
  - Stability observed for 9 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 3 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 Turkish IBAN, Tax Number & National ID Validation MCP server?

Turkish IBAN, Tax Number & National ID Validation is a hosted endpoint at https://foster-mcp.esakiz.workers.dev/validate/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-identifier-validation 'https://foster-mcp.esakiz.workers.dev/validate/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "foster-ops-turkey-identifier-validation": {
      "url": "https://foster-mcp.esakiz.workers.dev/validate/mcp"
    }
  }
}
```

### VS Code

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

### Codex

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

### opencode

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

### OpenClaw

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

### Hermes

```yaml
mcp_servers:
  foster-ops-turkey-identifier-validation:
    url: "https://foster-mcp.esakiz.workers.dev/validate/mcp"
```

### Netclaw

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

### Vellum

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

### Other

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

### 2026-11-06 (score 72, 0)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-11-05 (score 72, +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.

### 2026-11-02 (score 71, +1)

No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-31 (score 70, +1)

No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-29 (score 69, +1)

- [functional improvement] Stability: unverified → 0.03

### 2026-10-28 (score 68)

First indexed and scored.

## MCP tools (3)

### `validate_iban` (~100 tokens)

Validate a Turkish IBAN

Validates a Turkish (TR) IBAN: 26 characters, structure, reserved digit and ISO 13616 mod-97 checksum. Returns the normalized and grouped form, the 5-digit bank code and the account number part. Format and checksum only: a valid result does not prove the number is registered or belongs to anyone. Inputs are not stored or logged.

Input parameters:

- `iban` (string, required): IBAN; spaces and hyphens are ignored

Output parameters:

- `checks` (array)
- `formatted` (string|null)
- `normalized` (string)
- `note` (string)
- `parts`
- `type` (string)
- `valid` (boolean)

### `validate_tax_number` (~79 tokens)

Validate a Turkish tax number (VKN)

Validates the check digit of a 10-digit Turkish tax identification number (Vergi Kimlik Numarası, VKN) used by companies. Format and checksum only: a valid result does not prove the number is registered or belongs to anyone. Inputs are not stored or logged.

Input parameters:

- `vkn` (string, required): 10-digit VKN

Output parameters:

- `checks` (array)
- `normalized` (string)
- `note` (string)
- `type` (string)
- `valid` (boolean)

### `validate_national_id` (~109 tokens)

Validate a Turkish national ID number (TCKN)

Validates the check digits of an 11-digit Turkish national identity number (T.C. Kimlik Numarası, TCKN), which individuals also use as their tax number. The number is personal data: it is not echoed back. It does not confirm the person exists. Format and checksum only: a valid result does not prove the number is registered or belongs to anyone. Inputs are not stored or logged.

Input parameters:

- `tckn` (string, required): 11-digit TCKN

Output parameters:

- `checks` (array)
- `note` (string)
- `type` (string)
- `valid` (boolean)

## Diagnostics

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

## Score history

- 2026-11-06: 72
- 2026-11-05: 72
- 2026-11-04: 71
- 2026-11-03: 71
- 2026-11-02: 71
- 2026-11-01: 70
- 2026-10-31: 70
- 2026-10-30: 69
- 2026-10-29: 69
- 2026-10-28: 68

## Common questions

### What is the Turkish IBAN, Tax Number & National ID Validation MCP server?

Turkish IBAN, Tax Number & National ID Validation is an MCP server listed in the public MCP registry as io.github.foster-ops/turkey-identifier-validation. Checksum validation of Turkish IBANs, tax numbers (VKN) and national IDs (TCKN). Nothing stored. This page covers its hosted endpoint (https://foster-mcp.esakiz.workers.dev/validate/mcp).

### Is the Turkish IBAN, Tax Number & National ID Validation MCP server safe to use?

Turkish IBAN, Tax Number & National ID Validation scores 72 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 Turkish IBAN, Tax Number & National ID Validation MCP server expose?

Turkish IBAN, Tax Number & National ID Validation exposes 3 tools: validate_iban, validate_tax_number, validate_national_id. Their descriptions and schemas cost roughly 288 tokens of context every time the server is loaded.

### Does the Turkish IBAN, Tax Number & National ID Validation MCP server require authentication?

No. We connected to Turkish IBAN, Tax Number & National ID Validation without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Turkish IBAN, Tax Number & National ID Validation MCP server still maintained?

Turkish IBAN, Tax Number & National ID Validation is still listed as active in the MCP registry. We last reached this channel on 6 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 Turkish IBAN, Tax Number & National ID Validation MCP server?

VerifyMCP ran 12 checks on Turkish IBAN, Tax Number & National ID Validation, 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 Turkish IBAN, Tax Number & National ID Validation: 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/validate/mcp
- Website: https://foster-mcp.esakiz.workers.dev/llms.txt
- Changelog RSS feed: https://verifymcp.io/servers/foster-ops-turkey-identifier-validation/validate-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/foster-ops-turkey-identifier-validation/validate-mcp/changelog.json
- Trust report (JSON): https://verifymcp.io/servers/foster-ops-turkey-identifier-validation/validate-mcp.json
- HTML version of this page: https://verifymcp.io/servers/foster-ops-turkey-identifier-validation/validate-mcp