In-depth architectural comparison of the Dechonet MCP and SSL Certificate Check MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.
At a Glance & Executive Verdict
Dechonet MCP
Security · Local stdio
Quality: 60/100 (Good) | Auth: No auth required
SSL Certificate Check
Security · Remote HTTP/SSE
Quality: 70/100 (Great) | Auth: No auth required
Verdict Summary: Choose Dechonet MCP if you need specialized Security tools running via a local process. Choose SSL Certificate Check if your workspace requires Security integration with remote web transport. Both servers can be configured concurrently in your client's mcpServers manifest.
Which MCP Server Should You Choose?
Choose Dechonet MCP when:
You need dedicated capabilities in the Security domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
Domain security reconnaissance for AI agents. 13 tools — DNS + DNSSEC, SSL/TLS chain & grade, HTTP security headers, SPF/DKIM/DMARC email auth, TCP port scan, ASN, RDAP/WHOIS — plus a one-shot securityscan returning a 0-100 Health Score (A–F). Free, no API key. npx -y dechonet-mcp
Inspect the certificate and TLS versions served by one public endpoint, including hostname coverage and expiry; excludes full-chain, revocation, and cipher checks.
Category & Scope
Tools & Capabilities Breakdown
Dechonet MCP Tools (15)
dns_lookup
Query DNS records (A, AAAA, MX, TXT, NS, SOA, CAA) for a domain and validate email-related records, including DNSSEC presence and SPF/DMARC syntax, returning severity-rated diagnostics. Use this for a single authoritative answer about one domain. Use dns_propagation instead when you need to compare answers across multiple global resolvers (e.g., right after a change), or email_auth for a full SPF/DKIM/DMARC deliverability assessment. Read-only; requires no API key or authentication; subject to rate limiting. Returns a text report: status, KPI summary, detected issues, and recommended actions.
ssl_check
Inspect a host's served TLS/SSL certificate and connection: expiry date, issuer, SAN list, chain integrity, TLS version, and HSTS, returning an A+ to F grade weighted by certificate validity (40%), TLS version (25%), chain trust (15%), and HSTS (20%). Use this to diagnose certificate or HTTPS-handshake problems for one host. Use http_security instead to audit response security headers, or security_scan for an all-in-one domain report. Read-only: it completes a TLS handshake but sends no application data; requires no API key; rate-limited. Returns a text report: grade, expiry/issuer KPIs, issues, and actions.
http_security
Follow a URL's HTTP redirect chain and audit response security headers (CSP, HSTS, X-Frame-Options, COOP, CORP, COEP, Permissions-Policy), grading A+ to F and flagging information leaks such as server-version disclosure. Use this for HTTP-layer/header posture. Use ssl_check instead for certificate or TLS-handshake issues, or security_scan for a full domain report. Read-only (an HTTP GET-style probe that sends no payload); requires no API key; rate-limited. Returns a text report: grade, header findings, redirect trace, issues, and actions.
Ready-to-Paste Client Configurations
Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).
Dechonet MCP is categorized under Security and uses a local stdio subprocess. In contrast, SSL Certificate Check belongs to Security using remote streaming HTTP/SSE transport. Select Dechonet MCP when you need capabilities focused on security and SSL Certificate Check when you require tools for security.
Assess a domain's email authentication and deliverability posture: MX records, SPF, DMARC, DKIM (probes 15 common selectors), BIMI, MTA-STS, TLS-RPT, and DANE, plus a blacklist check across all MX hosts, returning a 0-100 deliverability score. Use this for a full sending/receiving readiness review of a domain. Use dns_lookup instead if you only need raw TXT/MX records, or email_header_analysis to diagnose a specific message that was already sent. Read-only; requires no API key; rate-limited. Returns a text report: score, per-mechanism KPIs, issues, and actions.
port_scan
Probe a host for a fixed set of common TCP ports (HTTP, HTTPS, SSH, FTP, SMTP, DNS, and common databases) and report which are open, the service name, and the response time. BEHAVIOR: this makes an ACTIVE TCP connection to the target. It is non-intrusive — a connect probe only; it does not authenticate, send exploits, or transfer data — and changes nothing on the target (read-only), but the connection is visible in the target's logs, so only scan hosts you own or are explicitly authorized to test. Use this to confirm which services are exposed. Use ssl_check or http_security instead to assess a specific service's configuration. Requires no API key; rate-limited. Returns a per-port open/closed list with service names.
dns_propagation
Query one DNS record across 8+ global public resolvers (Google, Cloudflare, Quad9, OpenDNS, and more) simultaneously and report which resolvers return stale versus updated values. Use this after changing a record to confirm worldwide propagation. Use dns_lookup instead for a single authoritative answer with SPF/DMARC validation. Read-only; requires no API key; rate-limited. Returns per-resolver values and a consistency verdict.
reverse_dns
Resolve the PTR (reverse DNS) record for an IPv4 or IPv6 address and verify forward-confirmed reverse DNS (FCrDNS) by checking that the PTR hostname resolves back to the same IP. Infers the hosting provider from PTR naming patterns. Use this to validate mail-server rDNS or identify a single IP's host. Use asn_lookup instead for network/BGP ownership of the IP. Read-only; requires no API key; rate-limited. Returns the PTR hostname, FCrDNS pass/fail, and a provider guess.
asn_lookup
Look up Autonomous System (ASN) / BGP information for an IP address or AS number: the network operator, announced prefixes, abuse contact, and a classification (cloud, CDN, ISP, hosting, or enterprise). Use this to identify who runs a network or whether an IP is cloud/CDN-hosted. Use reverse_dns instead for the host-level PTR name of a single IP. Read-only; requires no API key; rate-limited. Returns operator, prefixes, classification, and abuse contact.
whois_lookup
Retrieve domain registration data via RDAP (with WHOIS fallback): registrar, creation/expiry/update dates, nameservers, and EPP status flags, highlighting risk states such as clientHold and pendingDelete. Use this for ownership, lifecycle, and expiry questions about a registered domain. Use dns_lookup instead for live DNS records, or reverse_dns/asn_lookup for IP-level ownership. Read-only; requires no API key; rate-limited. Returns registrar, key dates, nameservers, and status flags.
subdomain_discovery
Enumerate the subdomains of a domain from Certificate Transparency logs — fully passive (no packets are sent to the target; CT logs are public records of every TLS certificate ever issued). Flags operational-looking names (dev, staging, admin, vpn, legacy) and wildcard certificates, because forgotten subdomains are a common takeover path. Use this as the first recon step to map a domain's attack surface. Use dns_lookup to check whether a discovered name still resolves, or lookalike_domains for typosquat variants of the domain name itself. Read-only; requires no API key; rate-limited. Returns the subdomain count, risky-name count, wildcard flag, and the hostname list.
lookalike_domains
Generate the typosquat/lookalike variants of a domain that phishers actually register — homoglyph swaps (l→1, o→0, rn→m), TLD swaps (.com→.co), character omissions, transpositions, repetitions, hyphenations — and check which of them are currently registered (live NS delegation via DoH). Use this to assess brand-impersonation and phishing exposure for a domain the user is responsible for. A registered variant is NOT proof of abuse (it may be an unrelated legitimate site) — follow up with whois_lookup on each hit for its owner and registration date. Read-only; requires no API key; rate-limited. Returns generated/checked counts and the registered variants with the technique that produced each.
ip_info
Report information about the caller's own public IP as seen by the server: IPv4/IPv6 address, ISP, ASN, approximate geolocation, and proxy/VPN heuristics. Takes no input — it reflects the egress IP of THIS MCP server's network, which is usually NOT the end user's IP. Use this to discover the server's outbound IP or test connectivity. To inspect a specific, known IP instead, use asn_lookup or reverse_dns. Read-only; requires no API key; rate-limited.
+3 more tools listed on main page
SSL Certificate Check Tools (1)
ssl_check
Opens its own TLS handshakes to one public host with openssl, using the URL's explicit port or 443 by default, and reports what they establish: which of TLS 1.3, TLS 1.2, TLS 1.1, TLS 1.0 and SSLv3 the server accepts, a protocol-support grade, and the certificate the server actually serves (subject, issuer, covered hostnames, hostname match, and validity dates). Reach for it on padlock, HTTPS, 'Not Secure', certificate-expiry and wrong-hostname questions, and to inspect which certificate is served after a renewal on the probed endpoint; this does not verify every load-balanced node. It does not fetch the page or establish whether plain HTTP is actually served or redirected, and it is not a browser trust decision: no chain-of-trust build, no revocation check, no cipher-suite inspection. Measured 0.05-1.5 seconds against real hosts; each probe is cut off at 12 seconds.