NPI Registry Scraper & NPPES Scraper — US Doctor NPI API

Bulk Email Deliverability Checker - SPF, DKIM, DMARC, MX

codeblix/email-deliverability-checker

Audit thousands of domains for email authentication, DNS issues, and deliverability risk. Checks SPF, DKIM, DMARC, MX, DNSSEC, MTA-STS, TLS-RPT, BIMI. No login, no proxy, no API keys needed.

Domain Health Checker

zinin/domain-health-checker

Audit DNS resolution, MX, SPF, DMARC, name servers, and TLS for a list of domains. Complete evidence cards include a 0–100 score, source states, issues, confidence, data gaps, and a next action. Incomplete or unsafe destinations remain unscored and are not billed as results.

Audit any domain's email authentication (MX, SPF, DMARC, BIMI, DKIM) and get a deliverability score with actionable issues.

🛡️ Audit MX, SPF, DMARC, DKIM, MTA-STS, TLS-RPT, BIMI, CAA, DNSSEC, and web TLS without sending email. Get evidence-backed security and deliverability scores, prioritized fixes, and a client-ready report.

Audit up to 1,000 public domains for MTA-STS policy reachability, MX coverage, TLS-RPT, DMARC enforcement, SPF record count, MX, and BIMI readiness.

Domain Intelligence Lookup

obicodes/domain-intel

Full domain intelligence in one call. Get WHOIS registration data, DNS records, SSL certificate status, IP geolocation, ASN, mail provider detection, and an actionable email security score (SPF, DMARC, MX). Built for developers, security teams, agencies, and growth teams.

Email Security & Deliverability Analyzer — SPF DKIM DMARC

perryay/email-security-analyzer

Enterprise email domain security audit: SPF/DKIM/DMARC/BIMI/MTA-STS DNS validation, 50+ blacklist scans, MX record analysis with IP resolution, deliverability scoring (0-100), and detailed remediation advice.

Email Security Scanner

cerridwen/email-security-scanner

DNS-only email posture for any domain: MX, SPF, DMARC, DKIM probes, MTA-STS, BIMI. No email sent. Returns score + actionable tips. Batch-friendly for CRM domains and compliance snapshots.

Domain DNS and Email Check: SPF, DMARC, DKIM, MX and SSL

examsens.ai/domain-dns-check

Checks the DNS records, email authentication (SPF, DMARC, DKIM, MX, MTA-STS, BIMI) and HTTPS certificate expiry of domains you name, and lists every problem found.

Check domains for DNS records (A, AAAA, CNAME, MX, NS, TXT, CAA, SOA), SPF lookup limits, DMARC policy/alignment, MTA-STS, TLS-RPT, BIMI, named DKIM selectors and DNSSEC. Return findings with severity; reporting addresses are reduced to domains.