Mail Security Tools vs dev.dnsdoctor/dns-doctor
Mail Security Tools is an MCP server published by api.mailsecuritytools.com. Marketplaces we read that list it: 1 (Official MCP Registry). dev.dnsdoctor/dns-doctor is an MCP server published by dnsdoctor.dev. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-27. This pair was picked by a reader, not by our comparison rule, so search engines are asked not to index the page.
Where each is published
| Marketplace |  dev.dnsdoctor/dns-doctor | |
|---|---|---|
| Official MCP Registry | Listed Version: 1.1.0 No figure published Not marked · First seen |
Listed Version: 1.14.0 Downloads/month (npm): 734 Downloads/week (npm): 262 Forks (GitHub): 0 Stars (GitHub): 2 Not marked · First seen |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
The facts side by side
| Fact | Mail Security Tools | dev.dnsdoctor/dns-doctor |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | No figure on GitHub | 2 |
| Forks (GitHub) (differs) | No figure on GitHub | 0 |
| Last release (differs) | 2026-10-15 (worse) | 2026-10-20 (better) |
| Where it runs (differs) | Remote server (api.mailsecuritytools.com/mcp) | Remote server (dnsdoctor.dev/mcp) |
| Transport | Streamable HTTP | Streamable HTTP |
| Tools it declares | Not published | Not published |
| Environment variables it asks for | Not published | Not published |
| Licence (differs) | Not stated | Apache-2.0 |
| Repository (differs) | Not stated | github.com/dnsdoctor/claude-plugin |
| Changes in the last 7 days (differs) | 0 | 1 |
| First seen (differs) | 2026-10-14 | 2026-10-11 |
| Endpoint at the last check (differs) | Responded 30 h ago | Responded 27 h ago |
Lines where the two differ have a tinted background and bold values. Where the data itself says which value is better (more marketplaces, a larger figure of the same marketplace, a fresher release, a verified mark on a marketplace that lists both), the better one is also marked green with ▲ and the worse one red with ▼. Where it runs, the transport, the tools, the settings, hooks, the bundle's parts, the licence and the week's changes are marked only as different: more or fewer is not better in itself.
What each says it does
Mail Security Tools
DMARC/SPF/DKIM/MX checks, email score, 100-domain bulk score, webhook watch alerts (x402 USDC).
dev.dnsdoctor/dns-doctor
Scan, fix, verify and monitor DNS: SPF, DMARC, DKIM, propagation, health, expiry. Validated fixes.
How to run each
Mail Security Tools As a remote MCP server
claude mcp add --transport http email-security https://api.mailsecuritytools.com/mcpdev.dnsdoctor/dns-doctor As a remote MCP server
claude mcp add --transport http dns-doctor https://dnsdoctor.dev/mcpCommands built only from what the marketplaces declare; the full set for every client is on each card.
Both endpoints responded at the last daily check. How we check endpoints
Tools each declares
Only Mail Security Tools has
bulk_email_security_scorecheck_domain_email_securitycheck_email_addressemail_fix_planemail_security_scorepricingwatch_status
Only dev.dnsdoctor/dns-doctor has
add_monitored_domainaudit_spf_includesbuild_dmarc_upgradebuild_parked_domain_recordscheck_dkim_selectorcheck_domain_verificationcheck_lookalikescheck_propagationcheck_recordcheck_reverse_dnscount_spf_lookupsgenerate_dmarc_record
Show the remaining 13
get_alertsget_domain_recordsget_email_testget_lookalikesget_readinessget_reportlist_email_testslookup_registrationparse_dmarc_reportscan_domainstart_email_teststart_monitoring_signupvalidate_dmarc_record
Both have
None
Tool names as the marketplaces declare them and as Ext Ops observed them on the endpoints (Mail Security Tools as of 2026-10-19; dev.dnsdoctor/dns-doctor as of 2026-10-18). More tools is not better in itself: compare what each needs for the job.
Settings each asks for
Neither one's marketplaces publish the settings it asks for.
What it can do: Mail Security Tools · What it can do: dev.dnsdoctor/dns-doctor · Compare two other plugins
Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Data comes from public marketplace files in GitHub repositories of their authors. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.