TPC Hosting network checks for AI: traceroute, DNS trace, HTTP/3, TTFB, SSL, SMTP, DNS, email. Free.
Connect Remote server
claude mcp add --transport http free-tools https://mcp-tools.tpc-hosting.com/mcp
{
"mcpServers": {
"free-tools": {
"url": "https://mcp-tools.tpc-hosting.com/mcp"
}
}
}
{
"servers": {
"free-tools": {
"type": "http",
"url": "https://mcp-tools.tpc-hosting.com/mcp"
}
}
}
Settings > Connectors > Add custom connector
URL: https://mcp-tools.tpc-hosting.com/mcp
Tools 44 found in our last check
dns_lookupLooks up DNS records (A, AAAA, CNAME, MX, NS, TXT, SOA or CAA) for a domain through a public resolver.
dns_propagationAsks several public resolvers around the world for the same record and reports whether they agree, which shows whether a DNS change has propagated.
dnssec_checkChecks whether a domain is signed with DNSSEC and whether its chain of trust (DS and DNSKEY records) is consistent.
mx_checkLists the mail servers (MX records) of a domain with their priorities and checks that they resolve.
spf_checkReads and validates a domain's SPF record: syntax, the 10-lookup limit, includes and the final policy.
dmarc_checkReads and validates a domain's DMARC record: policy, reporting addresses, alignment and percentage.
dkim_checkLooks up and validates a DKIM public key. Give the selector if you know it; otherwise the common selectors are tried.
bimi_checkChecks a domain's BIMI record and logo (SVG) for brand indicators in email clients.
email_blacklist_checkChecks whether a mail server IP address or a domain is listed on public DNS blocklists. Give exactly one of ip or domain.
email_deliverability_reportScores a domain's email setup (MX, SPF, DKIM, DMARC, MTA-STS, TLS-RPT, BIMI, blocklists) and lists what to fix. Covers the whole email setup in one call, for a general email health question.
whois_lookupLooks up a domain's registration data over RDAP: registrar, creation, expiry and update dates, status and nameservers. Not every country code TLD publishes RDAP.
hosting_checkFinds out who hosts a website: the IP addresses, the network and organisation behind them, the nameservers and any CDN in front.
redirect_checkFollows a URL's redirects hop by hop and reports each status code, the final address and problems such as loops, long chains or http-to-https gaps.
http_headers_checkFetches a page and reports its response headers, with a review of the security headers (HSTS, CSP, X-Frame-Options and others) and cookie flags.
website_down_checkChecks whether a website is reachable from Cloudflare's network: DNS first, then one request. Separates 'does not resolve' from 'will not connect' and 'answers with an error'.
robots_txt_testFetches a site's robots.txt and tests whether a given crawler may fetch a given path, following RFC 9309. Also lists the Sitemap lines and parser warnings.
sitemap_checkFinds a site's XML sitemap (from robots.txt or the usual addresses), then validates it against the sitemaps.org protocol and Google's rules. Reads at most 5 MB; a sitemap index is validated as an index, its child sitemaps are listed but not fetched.
url_status_checkFetches up to 10 URLs from one site and reports each one's final status code, redirects, content type and X-Robots-Tag. Useful for spot-checking pages listed in a sitemap.
ip_lookupDescribes a public IP address: the announced prefix and AS number, the network's name, country, registry and the reverse DNS name.
asn_lookupLooks up an AS number (like AS13335) in Team Cymru and RDAP: the network's name, organisation, country, registry and registration dates. An IP address is mapped to the AS that announces it first.
reverse_dnsFinds the PTR (reverse DNS) name of an IP address and checks that the name resolves back to the same address (forward-confirmed reverse DNS), which mail servers look for.
ssl_checkMakes live TLS connections to a host and reports the certificate chain, expiry, protocol versions, cipher strength and common misconfigurations. Ports 443, 8443, 465, 993 and 995.
smtp_testConnects to a domain's mail servers (MX) on port 25, says EHLO, tries STARTTLS and reports banners, TLS and reverse DNS. It never sends mail.
digSends a DNS query like the dig command, to Cloudflare, Google, Quad9 or a nameserver you name, and returns the full answer with flags and sections. Supports many record types, DNSSEC data and TCP.
dns_traceFollows a name from the root servers down through the TLD to its authoritative nameservers, like dig +trace, and shows each delegation step.
tracerouteTraces the network path from the probe server in Germany to a host, showing each hop's address and round-trip times.
http3_testChecks whether a site supports HTTP/2 and HTTP/3 (QUIC): ALPN negotiation, the Alt-Svc header and a live QUIC handshake probe.
ttfb_testTimes three requests to a web address from the probe server in Germany: DNS, connect, TLS, time to first byte and download. Results are never cached.
what_is_my_ipReturns the IP address this request reached the server from, and whether it is IPv4 or IPv6. For desktop clients such as Claude Code or Cursor that is the user's own address; hosted chat apps connect from the provider's servers.
subnet_calculatorWorks out the network, broadcast, host range, netmask and wildcard for an IPv4 or IPv6 address with a prefix, and can split an IPv4 network into equal smaller subnets.
bandwidth_calculatorTwo calculations: monthly data transfer and average speed for a website (visitors, pages per visit, page size), or how long a file takes to move at a given connection speed. Decimal units unless MiB, GiB or TiB are given.
chmod_calculatorConverts Unix file permissions between octal (755, 4755) and symbolic (rwxr-xr-x) form, shows the chmod command, explains who can read, write and run, and flags risky modes such as 777.
uptime_calculatorTurns an uptime percentage such as 99.9 into the downtime it allows per day, week, month, quarter and year, or turns a length of downtime in a period into the uptime percentage.
cron_expressionReads a classic 5-field cron expression (or @daily, @hourly, @reboot) and returns a plain-English description, the expanded form and the next run times in UTC.
punycode_convertConverts international domain names between Unicode and Punycode (xn--) one name at a time, up to 20 names, and warns about mixed-script look-alike names.
domain_name_ideasTurns one to three keywords into about 60 domain name ideas (prefixes, suffixes, blends) plus common endings. Ideas only: availability is not checked.
spf_record_generatorBuilds an SPF TXT record from a mail setup: sending IPs, mail providers such as Google or Microsoft, the a and mx mechanisms and soft or hard fail. Returns the record, a DNS lookup estimate and findings.
dmarc_record_generatorBuilds a DMARC TXT record for _dmarc.<domain>: policy, subdomain policy, percentage, report addresses and SPF and DKIM alignment. Returns the record and findings about reporting and policy strength.
robots_txt_generatorBuilds a robots.txt file: allow everything, block everything or custom Allow and Disallow paths, with sitemap URLs, a crawl delay and switches that block AI crawlers such as GPTBot and ClaudeBot. Returns the file and findings.
htaccess_generatorBuilds a commented .htaccess file for Apache and LiteSpeed: force HTTPS, www or non-www, 301 redirects, error pages, security headers, caching, compression and IP blocks. Returns the file text and findings.
llms_txt_generatorBuilds an llms.txt file in the llmstxt.org format from a site name, a summary, details and sections of links. Returns the file text and findings such as duplicate URLs or invalid links.
email_header_analyzerReads the raw headers of an email: the delivery path hop by hop with delays, SPF, DKIM and DMARC results, spam headers and findings. The headers are analysed in memory and are not stored.
ssl_certificate_decoderDecodes a pasted PEM certificate or chain: subject, issuer, validity dates, names, key, signature algorithm, fingerprints, extensions and findings, plus a chain order check. Private keys are refused.
csr_decoderDecodes a pasted PEM certificate signing request (CSR): subject, names, key type and size, signature algorithm, whether the signature verifies, and findings. Private keys are refused.
Details
| Endpoint | https://mcp-tools.tpc-hosting.com/mcp (Streamable HTTP) |
| First published | 11 Nov 2026 |
| Last updated | 11 Nov 2026 |
| Registry name | com.tpc-hosting/free-tools |
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