# Crewofthecaptain Format Checker MCP server

Source: https://glimind.com/server/mcp-registry%2Fcom.crewofthecaptain%2Fformat-checker
Registry id: `mcp-registry/com.crewofthecaptain/format-checker`
Status: live (checked 2026-10-27T07:52:11.520Z)

## Verdict

Crewofthecaptain Format Checker MCP server answered 100% of Glimind's liveness checks over 30 days, better than 42% of MCP servers, with 247 ms median handshake and 0 outages in 90 days. Its agent-readiness grade is A (96/100) across 7 tools, costing an agent about 943 tokens to load. Checked every few minutes; no tool is ever called.

## Measurements (30 days)

| Metric | Value | Better than |
|---|---|---|
| Uptime, 30 days | 100% | 42% of MCP servers |
| Median handshake latency | 247 ms | 68% of MCP servers |
| p95 handshake latency | 1899 ms | — |
| Checks in 30 days | 3,207 | — |
| Outages, 90 days | 0 | — |
| Median recovery | — | — |
| Agent-readiness score | 96/100 (A) | 82% of MCP servers |
| Tools | 7 | — |
| Tool-list size for an agent | ~943 tokens | 74% of MCP servers |
| Days observed | 15 | — |

## Install

```json
{
  "mcpServers": {
    "crewofthecaptain-format-checker-mcp-serv": {
      "type": "http",
      "url": "https://validate.crewofthecaptain.com/mcp"
    }
  }
}
```

Claude Code:

```sh
claude mcp add --transport http crewofthecaptain-format-checker-mcp-serv https://validate.crewofthecaptain.com/mcp
```

## Tools (7)

- `list_types`: List the available checks, price, network and payment details (free). Only $0.001 (0.1 cent) per check, paid via x402 in USDC on Base.
- `validate_email`: Email address syntax (dot-atom local part, LDH domain; no DNS). Only $0.001 (0.1 cent) per check, paid via x402 in USDC on Base. Returns {type, valid, normalize
- `validate_eu_vat`: EU VAT number: per-country format (offline, no VIES); PL also NIP checksum. Only $0.001 (0.1 cent) per check, paid via x402 in USDC on Base. Returns {type, vali
- `validate_iban`: IBAN: country length + ISO 13616 mod-97 checksum. Only $0.001 (0.1 cent) per check, paid via x402 in USDC on Base. Returns {type, valid, normalized, reason}; th
- `validate_pl_nip`: Polish NIP tax id: 10 digits + weighted mod-11 checksum. Only $0.001 (0.1 cent) per check, paid via x402 in USDC on Base. Returns {type, valid, normalized, reas
- `validate_pl_pesel`: Polish PESEL: checksum + encoded birth date and sex. Only $0.001 (0.1 cent) per check, paid via x402 in USDC on Base. Returns {type, valid, normalized, reason};
- `validate_pl_regon`: Polish REGON: 9 or 14 digits + mod-11 checksum. Only $0.001 (0.1 cent) per check, paid via x402 in USDC on Base. Returns {type, valid, normalized, reason}; the 

Measured by Glimind (https://glimind.com): MCP handshake + tool list only, no tool is ever called. CC BY 4.0.