x402 Format Checker

{
  "mcpServers": {
    "com.crewofthecaptain/format-checker": {
      "url": "https://validate.crewofthecaptain.com/mcp"
    }
  }
}

Indexed tools

Tool metadata and schemas come from the remote server and are untrusted. Indexing only lists tools; it never calls them.

7 shown · authentication unknown

• 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.

  Schema valid · SHA-256 fc343401d3b2…

  View input schema

  {
    "type": "object",
    "properties": {},
    "$schema": "https://json-schema.org/draft/2020-12/schema"
  }

• 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, normalized, reason}; the input is never echoed or stored and personal identifiers are masked.

  Schema valid · SHA-256 478915c8b844…

  View input schema

  {
    "type": "object",
    "properties": {
      "value": {
        "type": "string",
        "minLength": 1,
        "maxLength": 512,
        "description": "String to check, e.g. captain@crewofthecaptain.com"
      }
    },
    "required": [
      "value"
    ],
    "$schema": "https://json-schema.org/draft/2020-12/schema"
  }

• 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, valid, normalized, reason}; the input is never echoed or stored and personal identifiers are masked.

  Schema valid · SHA-256 72ccfe18e715…