Scan, fix, verify and monitor DNS: SPF, DMARC, DKIM, propagation, health, expiry. Validated fixes.
Connect Remote server
claude mcp add --transport http dns-doctor https://dnsdoctor.dev/mcp{
"mcpServers": {
"dns-doctor": {
"url": "https://dnsdoctor.dev/mcp"
}
}
}{
"servers": {
"dns-doctor": {
"type": "http",
"url": "https://dnsdoctor.dev/mcp"
}
}
}Settings > Connectors > Add custom connector
URL: https://dnsdoctor.dev/mcpTools 29 found in our last check
scan_domainUse this when the user asks to check, audit, diagnose or troubleshoot SPF, DKIM, DMARC, email authentication, email deliverability DNS, why their mail lands in spam, MX, DNS health, blacklist status, or domain/SSL expiry for a domain, or wants to fix what a scan finds (fix recor…
get_reportUse this for the same questions as scan_domain when a recent report is enough (the cheap first look); use scan_domain when the state must be re-read now. Return the stored report for a domain, scanning once only if none exists yet — the cheap read, and the right default for a fi…
build_dmarc_upgradeUse this when the user asks how to move DMARC on from p=none, whether it is safe to tighten DMARC, or what the next DMARC policy step is for a domain (a scan can justify quarantine at most; reject needs monitoring evidence) — and after any report showing DMARC below enforcement.…
start_monitoring_signupUse this when the user asks for ongoing DMARC monitoring, RUA report monitoring, new-sender monitoring, email-authentication alerts, ongoing DNS monitoring, or website uptime monitoring and down alerts for a domain they own (a verified domain's website is checked from five locat…
count_spf_lookupsUse this when the user asks about SPF 'too many lookups', the 10-lookup limit, an SPF PermError, or whether an SPF record is valid. Validate an SPF record and count what it costs. Returns `record_valid` (the record parses as RFC 7208 SPF), `findings` (per-term diagnostics), `has…
validate_dmarc_recordUse this when the user pastes a DMARC record and asks whether it is valid, correct or safe. Validate a pasted DMARC record: parsed tags, level'd findings, and whether it is valid. No DNS lookup — pass the record string itself. `upgrade_record` previews a stronger policy and is c…
generate_dmarc_recordUse this when the user asks to create, generate or write a DMARC record for a domain that has none. Build a DMARC record from scratch for a domain that has none, using a validating engine — never compose one yourself. `policy` is none|quarantine|reject; optional `rua_email` (agg…
check_dkim_selectorUse this when the user asks whether DKIM is set up for a sending platform, whether a specific selector exists, or why DKIM fails. Check ONE specific DKIM selector on a domain — the exact selector the sending platform uses (e.g. `google`, `s1`), which a full scan's common-selecto…
parse_dmarc_reportUse this when the user uploads or pastes a DMARC aggregate (RUA) XML report and asks what it says. Parse ONE DMARC aggregate (RUA) report into readable per-source aggregates: who sent mail as the domain, how much, and what share was SPF/DKIM aligned. Pass the file's bytes base64…
check_recordUse this when the user asks whether a DNS change has landed, wants a DNS record looked up, or wants to verify a record they just published — or whenever answering needs the live value of a record. Reads the record from the domain's OWN nameservers (cache-free) and from two publi…
check_reverse_dnsUse this when the user asks about reverse DNS, PTR records, or FCrDNS for a mail server IP. Check one sending IP's forward-confirmed reverse DNS (FCrDNS): reads the IP's PTR record, then resolves that hostname back and reports whether it returns to the same IP. `verdict` is conf…
audit_spf_includesUse this when the user asks who can send email as their domain through SPF includes, or wants an SPF supply-chain or third-party sender audit. Audit a domain's SPF supply chain: walks every include and redirect it delegates to, and reports who can transitively send as it. Return…
build_parked_domain_recordsUse this when the user asks how to protect a domain that sends no email from being spoofed. Build the three-record hardening pack that makes a NON-SENDING domain unusable for spoofing: a Null MX, a hard-fail SPF record, and a p=reject; np=reject DMARC record. For parked, redirec…
check_propagationUse this when the user asks whether a DNS change has propagated globally, or why a record shows in one place and not another. Check whether a DNS change has propagated GLOBALLY: six vantage points (five owner-run probes across four continents plus this server's own resolver) eac…
lookup_registrationUse this when the user asks who owns a domain, when it expires, which registrar or nameservers it has, whether it is registered, or whether a transfer or delete lock is set — the WHOIS question. Read a domain's registration from the registry over RDAP: registrar (with IANA id),…
get_alertsUse this when a signed-in operator asks what changed on a monitored domain, whether its website went down, or what the monitoring has flagged. Read the monitoring alert log for the domains the caller's account monitors, newest first, including website uptime incidents (site_down…
get_readinessUse this when a signed-in operator asks whether a monitored domain is ready for the next DMARC step. Read the DMARC enforcement-readiness verdict for ONE domain the caller's account monitors, computed from its aggregate (RUA) report window. Needs a connected DNS Doctor account o…
list_my_domainsUse this when a signed-in operator asks which domains their DNS Doctor account monitors, or what to do next on them. Lists every domain on the caller's account with its state — verified, pending (added, ownership not proven yet) or verification_lapsed (the ownership record was r…
check_lookalikesUse this when the user asks about lookalike, look-alike, typosquat or impersonation domains of their domain, or whether someone has registered a name close to theirs. DNS-only: checks the closest variants of the name and returns facts — how many resolve and how many accept mail,…
get_lookalikesUse this when a signed-in operator asks which lookalike domains of a monitored domain the watch has found, how risky they are, or for one's takedown evidence. Needs a connected DNS Doctor account or an API token with monitoring:read. Returns the account's watched lookalikes for…
start_email_testUse this when the user wants to know how a real email from them actually authenticates — whether a message from Google Workspace, Microsoft 365, a newsletter tool or an app is SPF/DKIM/DMARC aligned, why it lands in spam, or to prove DKIM signing works before tightening DMARC. R…
get_email_testUse this after start_email_test, once the user says they sent the email. Returns status pending | received | expired | error. pending means the message has not arrived (or is still being checked): ask the user to send it if they have not, then call again. received carries result…
list_email_testsUse this when a signed-in user asks about email tests they ran before, or how a sender's earlier tests scored. Needs a connected DNS Doctor account or an API token with monitoring:read. Returns the account's own tests, newest first (optionally only those whose From names one org…
check_bimiUse this when the user asks how to get their logo shown in Gmail, Yahoo, Apple Mail or other inboxes (BIMI), whether their BIMI setup works, or why their logo does not show. A live read of one host's BIMI setup: the DMARC gate (BIMI needs p=quarantine or p=reject; dmarc_sources…
add_monitored_domainAdd a domain to the signed-in user's DNS Doctor monitoring and return the ownership-check TXT record they must publish, plus where their DNS is hosted, a provider-specific guide link and, when their provider supports it, a one-click apply URL. Re-adding a domain they already mon…
check_domain_verificationUse this only for DNS Doctor's own ownership TXT challenge on a domain the user already added to their DNS Doctor account (add_monitored_domain). For a TXT record another service asked for (Google Workspace, Microsoft 365, Shopify or any site verification), use check_record inst…
get_domain_recordsRead the records a domain the user monitors still needs: the ownership check while it is unverified, and once verified the DMARC reporting record plus whether we have OBSERVED that record published. Read-only: it issues nothing — if a verified domain comes back with no reporting…
watch_record_changeUse this when the user asks to be told when a DNS change they are making has finished ("let me know when it's live"). Starts a free watch on ONE record for the signed-in user: DNS Doctor rechecks it every 10 minutes for up to 48 hours with the same verdict as check_record and se…
check_domain_namesUse this when the user is choosing a domain name and wants to know which candidates are already registered. Pass up to 20 candidate names in ONE call (never one call per name). Each name is read live from its registry over RDAP: status is registered | not_registered | unknown. r…
Details
| Endpoint | https://dnsdoctor.dev/mcp (Streamable HTTP) |
| Package | @dnsdoctor/[email protected] (NPM, stdio) |
| First published | 9 Nov 2026 |
| Last updated | 9 Nov 2026 |
| Registry name | dev.dnsdoctor/dns-doctor |
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