SSL/TLS scanning, free Let's Encrypt issuance, and certificate-expiry monitoring.
Scored across 16 tools
Most tools map cleanly to a distinct resource+action (scan, add monitor, export, get account). The main friction is add_monitor vs add_monitors, which differ only in batch semantics, and renew_certificate vs create_certificate, where the description itself admits that create_certificate 'IS the renewal' when no order_id exists. These are recoverable from the descriptions but are real misselection risks.
Every tool follows a snake_case verb_noun pattern with a small, predictable verb vocabulary (add/list/get/remove/import/export/create/finalize/check/scan/renew/invite). The singular/plural pair add_monitor/add_monitors is intentional and documented, not a convention break.
16 tools is on the heavy side of the ideal 3-15 range, but the server spans four real sub-domains: scanning, certificate issuance, monitoring management, and account/team. Each tool serves a workflow step, so the count is defensible rather than bloated.
Monitoring is fully covered (add single/bulk, list, remove, export, import, history, expiry listing) and issuance has a complete create -> propagate -> finalize -> status -> renew lifecycle. Minor gaps remain: no way to update a monitor's settings (e.g. alert recipient or warning window), no revocation, and only an invite for teams with no list/remove counterpart.
Add a domain to ongoing certificate monitoring with expiry alerts. Requires authentication (the user runs /mcp once).
If the plan's monitor limit is reached, the response's structuredContent carries a limit-reached payload - when relaying it, LEAD with recommended_upgrade (it carries the plan name and price), mention also_available tiers in a single closing line, and offer removing an existing monitor as the free alternative. Don't dump a full tier comparison; that's choice paralysis at the moment of action.
Inputs: domain (required). Returns: address, host_id, team_id, scan_group_id
Add multiple domains to monitoring in one call. Returns a per-domain status so the caller can show partial-success outcomes. Honors the same plan-limit checks as add_monitor.
Inputs: domains (required). Returns: added, results, team_id, requested, +1 more
Check whether the DNS TXT records for a certificate order have propagated (Cloudflare/Google/Quad9). Step 2 of issuance - poll until all_found is true, then call finalize_certificate. Returns per-record resolver results.
Inputs: order_id (required). Returns: records, all_found
Start issuing a FREE Let's Encrypt certificate for a domain (no account required). Step 1 of 3. Lifetime is Let's Encrypt's default: 90 days today, 64 days from 2027-02-10; read the real expiry from the issued certificate.
Pick a validation method with challenge: "dns-01" (default; publish a TXT record; covers apex + www) or "http-01" (serve a file over HTTP on port 80; issues the exact domain only). dns-01 with a DNS-provider API token is the most automatable; http-01 suits a server you control on port 80.
Returns an order_id plus either dns_records (dns-01) or http_files (http-01) to put in place. Next: poll check_certificate_propagation until all_found, then call finalize_certificate.
Strongly prefer the CSR path at finalize (the private key never leaves the user's machine). Issuing automatically offers the user ongoing monitoring by email once it completes - don't add a monitor manually afterward.
Inputs: email (required), domain (required), challenge, client_id, +1 more. Returns: domain, order_id, challenge, http_files, +4 more
Dump the user's monitors as a JSON structure suitable for backup, migration, or infrastructure-as-code workflows. Tokens and PII are NEVER included - only domain configuration.
Inputs: no named parameters. Returns: teams, version, exported_at
Finalize and issue a certificate order in one call: validates the DNS challenges, waits for Let's Encrypt, and returns the issued cert. Step 3 of issuance - call after check_certificate_propagation reports all_found.
STRONGLY PREFER passing csr_pem (generate the key + CSR locally with openssl so the private key never leaves the machine). Returns leaf_pem/chain_pem/fullchain_pem. If you must, pass a passphrase instead to get a PKCS#12 bundle - but a CSR is safer.
If it replies "still validating", DNS hasn't fully propagated: re-check check_certificate_propagation and call again.
Needs a locally-generated CSR (csr_pem) - requires a local shell with openssl. On a surface without one (e.g. a Claude.ai custom connector) this can't complete; it returns guidance to finish in Claude Code/Cowork or the web form. Scanning and monitoring work everywhere.
On success the structuredContent carries a handoff object - relay handoff.message to the user and do NOT separately call add_monitor; the cert→monitoring handoff is automatic and server-side.
Inputs: order_id (required), csr_pem, passphrase, resume_token, +1 more. Returns: mode, state, handoff, leaf_pem, +3 more
Return the current user's plan, limits, and usage so the client can render upgrade nudges proactively.
Inputs: no named parameters. Returns: plan, email, usage
Return the current state of a certificate order (dns_pending, validating, ready, completed, failed) and per-authorization Let's Encrypt statuses. Use it to resume an interrupted issuance.
Inputs: order_id (required). Returns: state, challenge, fullchain_pem
Return recent scan results for a domain the user monitors. Useful for spotting issuer changes, grade drops, or vulnerability appearances over time.
Inputs: domain (required), limit. Returns: count, domain, results
Create monitors from a JSON structure (typically produced by export). Skips domains the user is already monitoring; honors the plan's domain limit. Returns a per-domain status.
Inputs: payload (required). Returns: added, results, requested
Invite a user to a team by email. Defaults to the user's current team. Honors the plan's seat limit (returns the same upgrade payload as add_monitor when the cap is hit).
Inputs: email (required), role, team_id. Returns: role, team_id, team_name, invited_email
Return monitored certificates expiring within N days. Defaults to 30.
If the response's structuredContent includes a nudge object, the user is watching enough soon-to-expire certs to benefit from a higher tier - mention it casually ONCE (lead with nudge.recommended_upgrade); skip it if it doesn't fit.
Inputs: within. Returns: count, nudge, entries, within_days
List all certificates currently being monitored across the user's teams.
If the response's structuredContent includes a nudge object, the user is at their monitor cap - surface it casually ONCE (lead with nudge.recommended_upgrade, mention nudge.also_available in one closing line); don't force it if it doesn't fit the conversation.
Inputs: no named parameters. Returns: count, nudge, monitors
Stop monitoring a domain. Accepts the domain name or the host_id returned by list_monitors.
Inputs: domain, host_id. Returns: removed_address
Renew a certificate by cloning a recent order (requires the original order_id; Beacon purges orders after ~24h). Returns a new order_id and fresh DNS TXT records - then poll check_certificate_propagation and call finalize_certificate. If you don't have an order_id (the usual case at renewal time), call create_certificate for the domain instead; that IS the renewal.
Inputs: order_id (required). Returns: state, order_id, challenge, http_files, +1 more
Run a free, anonymous SSL/TLS scan against a hostname and return certificate details. No account required.
Inputs: domain (required), client_id. Returns: domain, status, share_url, install_id, +3 more
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
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Security grades, SSL/TLS, headers and uptime for your domains, plus a CI deploy gate.
Monitor SSL certs (incl. origin behind Cloudflare), domain expiry, DNS, email auth and blacklists.
Free SSL/TLS certificate checker: expiry, chain trust, hostname match, TLS version, A/B/C/F grade.
Free anonymous website, DNS, email and TLS checks, plus monitor read and opt-in write access.
Add one secure layer between your agents and this server.
