# VAT Validator MCP (remote · vat-validator-mcp-production.up.railway.app)

Validate EU, UK, AU VAT numbers for AI agents. EU ViDA e-invoicing compliance.

- Trust score: 61/100 (medium)
- Change this week: +4
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- remote · `vat-validator-mcp-production.up.railway.app`: 61/100 (this document), [markdown](https://verifymcp.io/servers/ojaskord-vat-validator-mcp/vat-validator-mcp-production.md), [page](https://verifymcp.io/servers/ojaskord-vat-validator-mcp/vat-validator-mcp-production)
- npm · `vat-validator-mcp`: 39/100, [markdown](https://verifymcp.io/servers/ojaskord-vat-validator-mcp/vat-validator-mcp.md), [page](https://verifymcp.io/servers/ojaskord-vat-validator-mcp/vat-validator-mcp)

## Channel facts

- Endpoint: `https://vat-validator-mcp-production.up.railway.app`
- Transports: `streamable-http`
- Auth: `none`
- Version: `2.0.30`

## 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 2026-08-03.

- **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 2 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**: 64/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 545 tokens (~272/item across 2 items; 2 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.
- **Capabilities**: 20/100
  - Spec-recency check failed: implements MCP spec 2024-11-05; the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add --transport http ojaskord-vat-validator-mcp https://vat-validator-mcp-production.up.railway.app/
```

### Codex

```toml
[mcp_servers.ojaskord-vat-validator-mcp]
url = "https://vat-validator-mcp-production.up.railway.app/"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "ojaskord-vat-validator-mcp": {
      "type": "remote",
      "url": "https://vat-validator-mcp-production.up.railway.app/",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add ojaskord-vat-validator-mcp --url https://vat-validator-mcp-production.up.railway.app/ --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  ojaskord-vat-validator-mcp:
    url: "https://vat-validator-mcp-production.up.railway.app/"
```

### Other

```json
{
  "mcpServers": {
    "ojaskord-vat-validator-mcp": {
      "type": "http",
      "url": "https://vat-validator-mcp-production.up.railway.app/"
    }
  }
}
```

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.

### 2026-08-03 (score 61, +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.

### 2026-08-01 (score 60, +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.

### 2026-07-31 (score 59, 0)

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

### 2026-07-30 (score 59, 0)

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

### 2026-07-29 (score 59, +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.

### 2026-07-28 (score 58, +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.

### 2026-07-27 (score 57, 0)

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

### 2026-07-26 (score 57)

First indexed and scored.

## MCP tools (2)

### `validate_vat` (~374 tokens)

Validates a VAT number against live government registries. Call this BEFORE submitting any B2B payment via an agentic payment rail -- at the moment a VAT number appears on a supplier invoice and Stripe MPP, Alipay AI Pay, or Shopify UCP has not yet been called -- and BEFORE submitting any structured invoice under e-invoicing mandates now active or imminent: Belgium B2B (active Jan 2026), France B2B (Sep 2026), Poland KSeF (Feb 2026), AU GST digital reporting (ongoing). Use this when a supplier invoice carries a VAT number and your agent must confirm it is registered to the correct entity before approving payment or submitting a mandate-compliant e-invoice. Validates against EU VIES (ec.europa.eu, 27 member states) and AU ABR (abr.business.gov.au) live registries. Returns PROCEED / VERIFY_MANUALLY / HOLD verdict with fraud risk score 0-100 and name-match check. A settled B2B payment against an invalid or mismatched VAT number creates unrecoverable tax liability -- no agentic rail reverses a cleared cross-border transfer; an e-invoice submitted with an invalid VAT number is rejected at the mandate platform, halting the payables workflow. Pass the country_code from this response to get_vat_rates. One call, machine-ready verdict, no further analysis needed.

Input parameters:

- `invoice_amount` (number): Invoice amount in local currency — used in fraud risk weighting.
- `invoice_company_name` (string): Company name as it appears on the invoice — if provided, cross-checks against registry and flags mismatches.
- `vat_number` (string, required): VAT number with country prefix. EU: DE123456789. AU: ABN12345678901.

Output parameters:

- `_disclaimer` (string)
- `address` (string|null)
- `agent_action` (string): Machine-readable verdict
- `checked_at` (string)
- `company_name` (string|null)
- `fraud_risk_level` (string)
- `fraud_risk_score` (number)
- `fraud_signals` (array)
- `jurisdiction` (string)
- `name_match` (string)
- `recommendation` (string)
- `source_url` (string)
- `summary` (string)
- `valid` (boolean): Whether the VAT number is currently registered and active per the source registry
- `vat_number` (string)

### `get_vat_rates` (~171 tokens)

Retrieves current VAT rates for a jurisdiction. Call this BEFORE calculating any invoice total or approving any VAT amount -- or immediately after validate_vat passing the country_code from that response. Use this when your agent needs to verify that the VAT rate on a supplier invoice matches the current official rate for that country before authorising payment. Returns current standard and reduced VAT rates for the jurisdiction. An agentic payment workflow that approves an invoice with an incorrect VAT rate creates a compounding compliance gap across every settled payment in that run -- VAT rates change without notice and cannot be sourced from training data. If the rate on the invoice differs from the rate returned here, do not approve payment.

Input parameters:

- `country_code` (string): ISO 2-letter code e.g. DE, FR, GB. Omit for all countries.

Output parameters:

- `_disclaimer` (string)
- `agent_action` (string)
- `checked_at` (string)
- `country` (string)
- `country_code` (string)
- `note` (string)
- `rates` (object): Present only when country_code is omitted -- full rate table for all supported jurisdictions
- `reduced` (array): Reduced VAT rates as percentages, if any apply
- `source_url` (string)
- `standard` (number): Standard VAT rate as a percentage

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/ojaskord-vat-validator-mcp/vat-validator-mcp-production#diagnostics

## Score history

- 2026-08-03: 61
- 2026-08-02: 60
- 2026-08-01: 60
- 2026-07-31: 59
- 2026-07-30: 59
- 2026-07-29: 59
- 2026-07-28: 58
- 2026-07-27: 57
- 2026-07-26: 57

## Links

- Remote endpoint: https://vat-validator-mcp-production.up.railway.app/
- Repository: https://github.com/OjasKord/vat-validator-mcp
- Website: https://kordagencies.com/
- Changelog RSS feed: https://verifymcp.io/servers/ojaskord-vat-validator-mcp/vat-validator-mcp-production/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/ojaskord-vat-validator-mcp/vat-validator-mcp-production/changelog.json
- HTML version of this page: https://verifymcp.io/servers/ojaskord-vat-validator-mcp/vat-validator-mcp-production