x402 Format Checker

Name: x402 Format Checker
Author: com.crewofthecaptain

MCP serverMCP

IBAN, EU VAT, NIP, REGON, PESEL, email checks. Only $0.001 (0.1 cent) per check via x402 on Base

by com.crewofthecaptainhomepage ↗v1.3.0

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Evidence

Everything here was measured by our prober or read from a registry. Nothing is self-reported.

30-day availability45/45 checks ok

when	check	result	http	latency	detail
2 h ago	mcp initialize	ok	200	64 ms	server x402 Format Checker 1.3.0 · protocol 2025-06-18 · 7 tools
9 h ago	mcp initialize	ok	200	43 ms	server x402 Format Checker 1.3.0 · protocol 2025-06-18 · 7 tools
16 h ago	mcp initialize	ok	200	66 ms	server x402 Format Checker 1.3.0 · protocol 2025-06-18 · 7 tools
23 h ago	mcp initialize	ok	200	209 ms	server x402 Format Checker 1.3.0 · protocol 2025-06-18 · 7 tools
30 h ago	mcp initialize	ok	200	61 ms	server x402 Format Checker 1.3.0 · protocol 2025-06-18 · 7 tools
2 d ago	mcp initialize	ok	200	120 ms	server x402 Format Checker 1.3.0 · protocol 2025-06-18 · 7 tools
2 d ago	mcp initialize	ok	200	58 ms	server x402 Format Checker 1.3.0 · protocol 2025-06-18 · 7 tools
2 d ago	mcp initialize	ok	200	41 ms	server x402 Format Checker 1.3.0 · protocol 2025-06-18 · 7 tools
2 d ago	mcp initialize	ok	200	28 ms	server x402 Format Checker 1.3.0 · protocol 2025-06-18 · 7 tools
3 d ago	mcp initialize	ok	200	75 ms	server x402 Format Checker 1.3.0 · protocol 2025-06-18 · 7 tools

Tools observed via MCP handshake

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_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_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_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_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
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_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

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No long description beyond the summary.

kind Official MCP Registry

name Official MCP Registry

summary Official MCP Registry

version Official MCP Registry

description Official MCP Registry

homepageUrl Official MCP Registry

publisherName Official MCP Registry

Provenance

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Official MCP Registrycom.crewofthecaptain/format-checker

first seen 12 d ago · fetched 3 d agoopen ↗

Field history (6 recent events)

12 d ago · declared · summary → "IBAN, EU VAT, NIP, REGON, PESEL, email checks. Only $0.001 (0.1 cent) per check via x402 on Base"
12 d ago · declared · description → "IBAN, EU VAT, NIP, REGON, PESEL, email checks. Only $0.001 (0.1 cent) per check via x402 on Base"
12 d ago · declared · publisherName → "com.crewofthecaptain"
12 d ago · declared · homepageUrl → "https://validate.crewofthecaptain.com/"
12 d ago · declared · version → "1.3.0"
12 d ago · declared · protocols → ["mcp"]

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Evidence

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Capabilities

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