Robtex MCP: DNS, IP and domain intelligence in your AI app

Add Robtex lookups to Claude, ChatGPT or Cursor

1. 1Click Connect Robtex free. There's no sign-in, so its tools are ready at once.
2. 2Every Robtex tool is on once you connect. Switch off the groups you won't use, such as `lookup_lightning_node` and the other Lightning Network tools if your work is DNS and IP only.
3. 3Add ContextGate to your AI app as a connector or MCP server. The steps for each app are on the Works with page.
4. 4Ask your AI app which hostnames point to an IP address, then open Activity to see the `reverse_lookup_ip` call.

What a Robtex lookup can tell you

• Look up A, AAAA, MX, NS, TXT and other DNS records for a hostname with `lookup_dns`, along with its rankings and blocklist status.
• Check an IP address against 100+ real-time blocklists with `ip_reputation`.
• Find hostnames that point to an IP today, or used to, with `reverse_lookup_ip` and the historic reverse lookups.
• Check a domain's registrar, expiry date and availability with `domain_rdap`, or the WHOIS record for an autonomous system.
• Look into Lightning Network nodes and channels.

An investigation you can retrace

• Switch off any Robtex tool; it's hidden from your AI app and refused if called.
• Activity records every lookup, so the steps behind a finding are there to check.

What you get with Robtex and ContextGate

• Your AI apps can use RobtexClaude, Cursor, ChatGPT and other AI apps reach Robtex through the one ContextGate connection you add to them.
• You choose which tools they can useSwitch off any Robtex tool you don't want used. It's hidden from your AI apps and refused if called.
• Every call is checked and recordedYour policies check each call (for example, personal data is hidden and secrets are blocked), and Activity keeps a record of it.

ContextGate sees only the tool calls that go through it, not your AI app's built-in tools or your chats.

Robtex tools

Examples of what your AI apps can do in Robtex. You'll see the exact list of tools after you connect it.

• latest_lightning_channelsReturns the most recently opened Lightning Network channels, sorted by open time descending.
• ip_reputationCheck an IP address reputation against 100+ real-time blocklists (DNSBLs). Returns listing status, threat categories, AS info, and blocklist details.
• lookup_dnsLookup DNS records (A, AAAA, MX, NS, TXT, CNAME, SOA) for a given hostname. Also returns domain reputation info (Majestic, Tranco rankings, blocklist status).
• reverse_lookup_dns_recordsFind hostnames that use a specific DNS record value. Query which hostnames point to an IP address, use a particular nameserver, or reference any DNS value. For example: 'which hostnames point to 1.2.3.4?' or 'which hostnames use chris.ns.cloudflare.com as their nameserver?'
• reverse_lookup_mxFind hostnames that use a specific mail server. For example: which hostnames use aspmx.l.google.com as their mail server?
• reverse_lookup_nsFind hostnames that use a specific nameserver. For example: which hostnames use chris.ns.cloudflare.com as their nameserver?
• reverse_lookup_ipFind hostnames that point to a specific IP address (IPv4 or IPv6). Searches both A and AAAA records. For example: which hostnames point to 1.2.3.4?
• historic_reverse_lookup_nsFind hostnames that *previously* used a specific nameserver but no longer do. Tracks infrastructure migrations and past delegation relationships.
• historic_reverse_lookup_mxFind hostnames that *previously* used a specific mail server but no longer do. Tracks email provider migrations and past MX relationships.
• historic_reverse_lookup_ipFind hostnames that *previously* pointed to a specific IP address but no longer do. Tracks hosting migrations and past IP relationships. Searches both A and AAAA records.
• lookup_macLook up the manufacturer/vendor of a network device by its MAC address. Uses the official IEEE OUI (Organizationally Unique Identifier) database with ~30K entries.
• lookup_as_whoisLookup WHOIS information for an Autonomous System (AS) number from the RADB routing database. Returns routing policy, network information, and administrative contacts.
• lookup_lightning_nodeLookup a Lightning Network node by public key. Returns node alias, peer count, channel count, and centrality ranking.
• lookup_lightning_channelLookup a Lightning channel by channel ID. Supports numeric, block x txn x vout, or block:txn:vout formats.
• lookup_lightning_channels_per_nodeLookup all Lightning Network channels for a given node by public key.
• get_recommended_lightning_peersGet recommended Lightning Network peers for a given node. Returns nodes that are NOT currently peered with the specified node but would improve its centrality score if connected.
• search_lightning_nodes_by_aliasSearch for Lightning Network nodes by partial alias match. Returns nodes whose aliases contain the search term (case-insensitive).
• domain_rdapQueries the authoritative RDAP registry for a domain. Returns availability status (HTTP 404 = available), and for registered domains: registrar name, registration/expiration dates, nameservers, DNSSEC status, and domain status flags. Uses IANA bootstrap to find the correct RDAP server per TLD. Covers 590+ TLDs.
• parse_hostnameParse a hostname into its constituent parts using the Mozilla Public Suffix List (9700+ entries). Returns eTLD (effective TLD), registered domain, subdomain, labels, and depth. Handles multi-level eTLDs (co.uk, co.jp, com.au) and platform suffixes (github.io, herokuapp.com).
• is_subdomainCheck whether a hostname is a subdomain (has labels beyond the registered domain). Uses the Mozilla Public Suffix List for accurate eTLD detection.