Zero-Cost B2B Domain Tech-Stack & Email Gateway Enricher CLI + DNS Deliverability Toolkit (Node.js + CSV)

Zero-dependency Node.js CLI toolkit that replaces $149/mo lead enrichment subscriptions. Inspects target company domains for MX email gateways (detecting Proofpoint, Mimecast, and Barracuda enterprise spam filters before you burn your cold email domains), scrapes homepage tech stack signatures (Next.js, Shopify, Webflow, Stripe, PostHog, Segment, HubSpot, Intercom), checks hiring/pricing links, and audits your own sending domains for SPF, DMARC, and DKIM compliance.