B2BDomainSignalVerify: is this a real, mail-ready company domain?
B2BDomainSignalVerify is a free, read-only check with 6 automated tests: Check up to 25 company domains at once before you import a lead list or approve a signup. For each domain we read public DNS and the website: mail servers (MX), the email provider (Google Workspace, Microsoft 365, Mimecast, Proofpoint and more), SPF and DMARC strictness, disposable or free-mail domains, and whether the company website is live. Results are instant; copy-paste fixes and monitoring start at $4.99. It is also available to AI agents as the MCP tool verify_corporate_domain_signals.
Check up to 25 company domains at once before you import a lead list or approve a signup. For each domain we read public DNS and the website: mail servers (MX), the email provider (Google Workspace, Microsoft 365, Mimecast, Proofpoint and more), SPF and DMARC strictness, disposable or free-mail domains, and whether the company website is live.
Unlock the complete deliverable
Your free check above is complete. The fix pack adds a copy-paste fix for every item that needs attention. The first 3 are below, free.
Tailor unlock for:
Card, Apple Pay, Google Pay or Link via Stripe; refunds on request within 14 days.
✓ Read-only, live public data · Key and unlock right after payment · Card, Apple Pay, Google Pay or Link via Stripe · Refunds on request within 14 days
Preview what the unlock includes
- A copy-paste fix for every check that needs attention, written for your page
- Where each fix goes (page HTML, server headers or DNS) and how to confirm it
- Re-run the free check any time to verify
Already paid? Enter your key or email to unlock
Domain-level only: public DNS lookups and one home-page request per domain. We never contact mail servers, test or guess mailboxes, or process personal addresses (anything before an @ is discarded).
Plans
Full domain signal Report
$4.99 one-time
- One-time $4.99: the full domain signal report and export for one target
- Unlocked instantly with your key
Monitor (10 domain lists)
$29 / month ($0.95/day)
- Daily re-check of up to 10 domain lists. Billed monthly (or yearly at the annual price); cancel any time
- Change log on your watch dashboard and API, plus email alerts on changes
Monitor Pro (50 domain lists)
$79 / month ($2.60/day)
- Daily re-check of up to 50 domain lists. Billed monthly (or yearly at the annual price); cancel any time
- Change log, CSV export and API access
More ways to buy
500 API / MCP Credits
$9.99 one-time
- 500 full (unredacted) REST or MCP calls across every product
- Credits never expire
Unlimited API / MCP Key
$29 / month
- Unlimited full REST and MCP calls across every product. Billed monthly (or yearly at the annual price); cancel any time
- For Make, Zapier, n8n and AI agents
Watch My Domain
$5 / month
- Weekly read-only re-check of one domain. Billed monthly (or yearly at the annual price); cancel any time
- Email when the result changes
White-Label Client Report
$9.99 one-time
- One downloadable client-ready HTML report with your agency name and domain in the header
- No branding from us
Agency White-Label Pass
$79 / month
- Unlimited white-label client reports for this tool. Billed monthly (or yearly at the annual price); cancel any time
API: 10 free calls per day without a key. Datasets contain public records only, at organization level.
Payments are processed securely by Stripe. Refunds are available by default within the first 14 days of paid service.