Robtex
Operator: Robtex
DNS, IP and network research with historical connections, WHOIS, an API and MCP.
Technical Infrastructure
Product
Robtex, a web research service for internet infrastructure with a REST API and MCP integration.
Availability and source date
Active
As of: 16 October 2026.
No functionality test has been performed.
Use in OSINT research
Shows which domains, IP addresses and nameservers are connected or were connected in the past. Shared hosting does not prove a common operator.
Queries
| Input | Result | Result type |
|---|---|---|
| Domain / website | DNS records, WHOIS/RDAP data and current and historical connections to IP addresses, mail servers and nameservers. | Retrieved |
| IP address | Network, AS number, approximate geolocation and associated hostnames. | Retrieved |
| ASN | Network operator, announced IP networks and routing information. | Retrieved |
| Crypto wallet | For Bitcoin addresses: balance, transactions and available abuse reports. | Retrieved |
| Email address | API only: SMTP acceptance, catch-all indications and TLS support. Does not identify a person or guarantee delivery. | Technical check according to provider |
Features
- Links domains to IP addresses, mail servers and nameservers.
- Shows historical DNS relationships with observation times.
- Provides WHOIS/RDAP and routing information.
- Checks IP addresses and domains against reputation lists and blocklists.
- Shows Bitcoin transactions and Lightning Network data.
- Checks email addresses technically through the API using SMTP.
Categories
- Technical Infrastructure
- DNS
- Domains & WHOIS
Coverage
Dataset
Public DNS, WHOIS, routing and blockchain data from multiple sources. According to the provider, passive DNS observations date back to 2009; coverage varies by domain.
Access
Installation and deployment
Website · Locally installable
Hosted web service with an optional locally installable MCP proxy through npx or Docker. The local client still accesses the hosted Robtex service.
Requirements
Web research and a free REST API without an account. Paid API plans are provided through RapidAPI.
Export
REST API with JSON and NDJSON for passive DNS queries.
Provider
Robtex
Country of establishment
Unknown
Interfaces
API
Available. Free REST API with 10 queries per hour per IP address; higher allowances through RapidAPI.
MCP
Available. Public MCP endpoint for network and blockchain queries.
AI agents
Available. Documented integrations for Claude, Cursor, Codex and ChatGPT.
Legal note
Limitations
- The completeness of historical DNS data varies by domain.
- Shared IP addresses or nameservers do not establish a common operator.
- Email checks use SMTP and do not confirm identity.
Guides and practical reports
Official · Robtex: API and query examples
Robtex · EN
Explains queries, response formats and free-tier limits.