Validation & lookups an LLM can't reliably do itself, for ecommerce/fintech agent
workflows. Hosted, remote, ready to plug into Claude / Cursor / any MCP client.
Connect (free tools work immediately):
https://mcp.scienceswarm.org/mcp
Free (7 tools): IBAN, US ABA routing, and GTIN/UPC
barcode checksums; EU VAT rates by country & date; Stripe Connect split,
payout reconciliation & reorder-point math.
Pro — $19 (one-time key): unlocks the live-registry tools —
EU VAT (VIES) registry validation (returns registered trader name),
EORI validation (EU customs registry, needed for imports/exports) and
email-domain deliverability (live MX).