# CheckBiz Merchant Check (remote · api.checkbiz.eu)

Let your shopping agent check the shop before it pays: a real, active, EU-registered company?

- Trust score: 79/100 (medium)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-23

## Components

- remote · `api.checkbiz.eu`: 79/100 (this document), [markdown](https://verifymcp.io/servers/eu-checkbiz-merchant-check/api.md), [page](https://verifymcp.io/servers/eu-checkbiz-merchant-check/api)

## Channel facts

- Endpoint: `https://api.checkbiz.eu/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**: 77/100
  - 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.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC is configured correctly; the domain's records validate against the full chain to the root.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 75/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 316 tokens (~316/item across 1 items; 1 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 50/100
  - Stability observed for 15 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.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 1 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 1 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 CheckBiz Merchant Check MCP server?

CheckBiz Merchant Check is a hosted endpoint at https://api.checkbiz.eu/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 eu-checkbiz-merchant-check 'https://api.checkbiz.eu/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "eu-checkbiz-merchant-check": {
      "url": "https://api.checkbiz.eu/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "eu-checkbiz-merchant-check": {
      "type": "http",
      "url": "https://api.checkbiz.eu/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.eu-checkbiz-merchant-check]
url = "https://api.checkbiz.eu/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "eu-checkbiz-merchant-check": {
      "type": "remote",
      "url": "https://api.checkbiz.eu/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add eu-checkbiz-merchant-check --url 'https://api.checkbiz.eu/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  eu-checkbiz-merchant-check:
    url: "https://api.checkbiz.eu/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "eu-checkbiz-merchant-check": {
      "Transport": "http",
      "Url": "https://api.checkbiz.eu/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add eu-checkbiz-merchant-check -t streamable-http -u 'https://api.checkbiz.eu/mcp'
```

### Other

```json
{
  "mcpServers": {
    "eu-checkbiz-merchant-check": {
      "type": "http",
      "url": "https://api.checkbiz.eu/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.

### 2026-10-22 (score 79, +1)

No change was recorded against any check on this day. Stability & Change Management went from 43 to 47. That category is still filling its 30-day observation window: 13 days of observed history at the previous scan, 14 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-20 (score 78, +1)

No change was recorded against any check on this day. Stability & Change Management went from 37 to 40. That category is still filling its 30-day observation window: 11 days of observed history at the previous scan, 12 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-17 (score 77, +1)

No change was recorded against any check on this day. Stability & Change Management went from 27 to 30. That category is still filling its 30-day observation window: 8 days of observed history at the previous scan, 9 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-15 (score 76, +1)

No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-13 (score 75, +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.

### 2026-10-12 (score 74, +1)

No change was recorded against any check on this day. Stability & Change Management went from 7 to 13. That category is still filling its 30-day observation window: 2 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.

### 2026-10-10 (score 73, +1)

- [functional improvement] Stability: unverified → 0.07

### 2026-10-08 (score 72)

First indexed and scored.

## MCP tools (1)

### `check_merchant` (~316 tokens)

Check a merchant before paying

Check a web shop BEFORE paying it: is the shop on this domain a real, active, registered company in a European business register, and does the domain belong to that company? Reads the registration / VAT number the shop states on its own imprint, terms or footer, looks it up in the national register (Denmark, Sweden, Norway, Finland, UK, Germany and other EU countries), validates VAT in VIES/HMRC, screens the company against sanctions lists, and checks domain age, TLS certificate and a public phishing list. Returns match = verified | partial | not_found | attention with evidence per signal and the source of each field. Evidence, not a verdict — you decide. Pass vat_number (and country) from the checkout or invoice when you have it; it also catches a checkout VAT number that belongs to a different or ceased company. When the free monthly lookups run out, the result contains buy_url: show it to your user — one payment adds 150 lookups.

Input parameters:

- `company_name` (string): Company name shown at checkout, if any
- `country` (string): ISO country code of that number, e.g. "dk", "se", "uk" — helps read a bare number
- `domain` (string, required): The shop's domain or URL, e.g. "example-shop.dk"
- `vat_number` (string): VAT or company registration number shown at checkout / on the invoice, e.g. "DK27528430" or "556710-4699"

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/eu-checkbiz-merchant-check/api#diagnostics

## Score history

- 2026-10-23: 79
- 2026-10-22: 79
- 2026-10-21: 78
- 2026-10-20: 78
- 2026-10-19: 77
- 2026-10-18: 77
- 2026-10-17: 77
- 2026-10-16: 76
- 2026-10-15: 76
- 2026-10-14: 75
- 2026-10-13: 75
- 2026-10-12: 74
- 2026-10-10: 73
- 2026-10-08: 72

## Common questions

### What is the CheckBiz Merchant Check MCP server?

CheckBiz Merchant Check is an MCP server listed in the public MCP registry as eu.checkbiz/merchant-check. Let your shopping agent check the shop before it pays: a real, active, EU-registered company? This page covers its hosted endpoint (https://api.checkbiz.eu/mcp).

### Is the CheckBiz Merchant Check MCP server safe to use?

CheckBiz Merchant Check scores 79 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 CheckBiz Merchant Check MCP server expose?

CheckBiz Merchant Check exposes 1 tool: check_merchant. Their descriptions and schemas cost roughly 316 tokens of context every time the server is loaded.

### Does the CheckBiz Merchant Check MCP server require authentication?

No. We connected to CheckBiz Merchant Check without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the CheckBiz Merchant Check MCP server still maintained?

CheckBiz Merchant Check 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://api.checkbiz.eu/mcp
- Authorisation metadata: https://api.checkbiz.eu/.well-known/oauth-protected-resource/mcp
- Website: https://checkbiz.eu/merchant-check/
- Changelog RSS feed: https://verifymcp.io/servers/eu-checkbiz-merchant-check/api.xml
- Changelog JSON feed: https://verifymcp.io/servers/eu-checkbiz-merchant-check/api.json
- HTML version of this page: https://verifymcp.io/servers/eu-checkbiz-merchant-check/api