Email Deliverability MCP server

• analyze_headersFree

  Re-verify SPF, DKIM, DMARC, and ARC from a raw RFC 5322 email (full message or just the headers block). Returns InboxGuard's independent verdict (`ours`), the sender's own Authentication-Results (`theirs`), whether they `agree`, and parsed envelope/headers — useful for spotting forged or mismatched auth results. No account needed.

• apply_dns_fixFree

  Apply a DNS fix plan to a tracked domain by publishing records at the connected registrar. DESTRUCTIVE: it creates/updates/deletes DNS records. Two-step by design — first call get_dns_fix_plan, then pass its `connectionId` and `ops` here verbatim. The server re-derives the diff from the latest scan and rejects any op that no longer matches, so an agent can never apply arbitrary records. Requires an owner/admin API key with write or full scope. Re-scan afterward to confirm the fix.

• check_blocklistsFree

  Check a domain (apex + MX-host IPs) against supported DNS blocklists and return listings, targets checked, and issues (authoritative-side queries; no public-resolver false positives).

• connect_inbox_placementFree

  Store the org's seed-list inbox-placement provider + API key (provider: 'mailreach' or 'glockapps'; GlockApps also needs projectId). Enables start_inbox_placement_test. Requires an owner/admin API key with write or full scope.

• connect_sndsFree

  Store this org's Microsoft SNDS (Smart Network Data Services) automated-data-access key so InboxGuard syncs per-IP Outlook/Hotmail reputation daily. Get the key from the SNDS Automated Data Access page (https://sendersupport.olc.protection.outlook.com/snds/). Requires an owner/admin API key with write or full scope. Data appears within ~24h of the first sync.

• create_notification_channelwrite actionFree

  Create a channel that InboxGuard alerts are delivered to: webhook (HMAC-signed), Slack, Microsoft Teams, PagerDuty, SMS, or email. Returns the channel id, and for kind=webhook the `signing_secret` used to verify deliveries. Requires an owner/admin API key with write or full scope.

• create_share_linkwrite actionFree

  Create a read-only public share link for a tracked domain's latest report (anyone with the URL can view it; no account). Returns a `token` and the public `url` (https://inboxguard.io/r/<token>). Requires an owner/admin API key with write or full scope, on a plan that includes public reports.

• get_deliverability_reportFree

  Return a structured deliverability report for a tracked domain: the latest score + letter grade + `scoreSubtitle` (explains the denominator when a check was excluded, e.g. "80/100 · scored on 65 of 83 applicable points · 1 check unverified"), each check's status (pass/warn/fail/unverified/not_applicable — `not_applicable` means the check doesn't apply to this domain and `unverified` means it couldn't be checked this scan; neither is a failure), the top issues to fix, blocklist count, and DMARC policy. Includes `pdfUrl` — the same auth-gated endpoint that returns a branded one-page PDF (send your bearer token). Use this to summarize a domain's posture or hand a client a report.

• get_deliverability_scoreFree

  Return the overall deliverability score and letter grade for a domain (runs a fresh scan).

• get_dmarc_summaryFree

  Summarize ingested DMARC aggregate (RUA) reports for a domain tracked in your InboxGuard account: report volume, pass rate, top sending sources, and the rua inbox to publish. The domain must already be added to the account, and the plan must include DMARC ingest.

• get_dns_fix_planFree

  Compute the exact DNS-record changes needed to fix a tracked domain's deliverability, based on its latest scan and the org's connected registrar (Cloudflare/Route 53/GoDaddy/Namecheap). Read-only — nothing changes. Returns the `ops` to pass verbatim to apply_dns_fix, plus `manualReview` items that need a human decision (SPF sender list, DKIM keys, BIMI logo). Requires the domain to be tracked, a scan to exist, and a registrar connection covering the zone.

• get_domainFree

  Full detail for one tracked domain: the domain record, the latest scan with all per-check findings (spf, dmarc, dkim, ptr, mta_sts, tls_rpt, mx_tls, blocklist), recent score history, open/recent alerts, and Google Postmaster stats when connected.

• get_inbox_placement_statusFree

  Report whether a seed-list inbox-placement provider is connected for the org, which provider, and how many tests have run. Lists the supported providers when not connected.

• get_inbox_placement_testFree

  Poll a seed-list inbox-placement test by testId. Returns status (running/completed/failed) and, once measured, the Inbox/Spam/Missing counts and inbox-placement score (0–100). Call after sending your campaign to the seed addresses from start_inbox_placement_test.

• get_portfolioFree

  Org-wide deliverability rollup across every monitored domain: average score + overall grade, the grade distribution (how many domains are A/B/C/D/F/unscored), total open alerts, the domains needing attention (lowest score / open alerts first), and a per-client-group breakdown. Use this for an at-a-glance portfolio health summary across an agency or multi-domain account.

• get_scan_jobFree

  Poll an async batch scan started with scan_domains_batch: returns status (queued/running/succeeded/partial/failed), completed count, and per-domain results (domain, ok, score, grade) as they finish.

• get_snds_ip_statsFree

  Return the latest per-IP reputation from Microsoft SNDS for the org's sending IPs: filter result (GREEN/YELLOW/RED), complaint-rate band, spam-trap hits, message volume, and current block status. Requires SNDS to be connected (see connect_snds / get_snds_status).

• get_snds_statusFree

  Report whether Microsoft SNDS is connected for the org, the last sync time + status, how many sending IPs are tracked, and how many are currently blocked by Outlook/Hotmail. Use before get_snds_ip_stats to confirm the integration is live.

• list_alertsFree

  List the account's deliverability alerts (score drops, check failures, blocklist listings). Defaults to open alerts only.

• list_domainsFree

  List the account's tracked domains with latest scan score, last scan time, and open alert count.

• list_inbox_placement_testsFree

  List recent seed-list inbox-placement tests for the org (most recent first) with their status and Inbox/Spam/Missing scores.

• list_registrar_connectionsFree

  List the registrar accounts (Cloudflare, Route 53, GoDaddy, Namecheap) connected to the org — provider, verification, last-used time — plus the supported providers. Use this to check whether the detect-and-fix loop (get_dns_fix_plan / apply_dns_fix) is available before attempting it.

• list_scansFree

  List recent scans (id, domain, run time, score) across all tracked domains, or for one domain when a name is given.

• remove_domainwrite actionFree

  Stop monitoring a domain and delete it (and its scan history) from the account. DESTRUCTIVE and not reversible. Requires an owner/admin API key with write or full scope. (To ADD a domain, run scan_domain with this API key — authenticated scans auto-track the domain.)

• resolve_alertFree

  Mark an alert resolved (or reopen it with resolved=false). Requires an API key with write/full scope. Resolving an already-resolved alert is a no-op.

• scan_domainwrite actionFree

  Run a full email-deliverability scan (SPF, DKIM, DMARC, MTA-STS, TLS-RPT, MX TLS, BIMI, DNS blocklists) for a domain and return a 0-100 score with per-check findings. A check can come back `not_applicable` (does not apply to this domain, e.g. MTA-STS on a domain with no MX — excluded from the score, not a failure) or `unverified` (could not be determined this scan, e.g. DKIM behind an ESP with a random per-tenant selector like Amazon SES Easy DKIM — never treat as a failure). `scoreSubtitle` explains the denominator when anything was excluded. Runs at your plan tier (full blocklist set on paid plans) and saves the scan to the domain history in your account.

• scan_domains_batchFree

  Queue an asynchronous batch scan of up to 50 domains and get a jobId immediately (avoids the 30s per-call limit). Poll get_scan_job with the jobId until status is succeeded/partial/failed to read per-domain scores. Requires an API key with write or full scope. These scans are NOT added to monitoring or saved to history.

• start_inbox_placement_testFree

  Start a seed-list inbox-placement test. Returns a testId, the seed addresses to mail your campaign to, and (if the provider requires it) a header to insert. After sending to the seeds, poll get_inbox_placement_test for the Inbox/Spam/Missing verdict. Requires inbox-placement to be connected and an owner/admin API key with write or full scope.

• –Code scanremote-only server, no package to scann/a
• Live reliabilityremote reachable in 689ms20/20
• Tool poisoning28 tool descriptions checked15/15
• Auth qualityopen endpoint exposes 4 write-action tools with no auth3/15
• Maintenanceno repository listed3/15
• Maintainer identityno repository or website to verify2/10

Email Deliverability: common questions

Is Email Deliverability MCP server safe?

With care: it is graded C, so read the findings first (57/100). Read the Email Deliverability safety report

How do I install Email Deliverability?

It runs remotely at mcp.inboxguard.io. Add it to Claude Code, Claude Desktop or Cursor with the snippets above, or call it through the mcp.market gateway without installing anything.

Does Email Deliverability need an API key?

Not as far as the registry entry and our scan can tell: no credentials are declared or required.

Is Email Deliverability maintained?

The latest release is v1.2.0.

Is Email Deliverability up?

100% of our last 28 checks got an answer. We check remote servers about four times a day.

What can I use instead of Email Deliverability?

Servers from other publishers that do the same job: e2a — email for AI agents MCP server, MCP server and IntoDNS.ai DNS & Email Security Scanner MCP server. Compare all Email Deliverability alternatives.