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Censys MCP Server

Name: Censys
Availability: InStock
Author: Vinkius

censys.io

Built by Vinkius GDPR ToolsFree for Subscribers

Search internet-connected hosts, SSL certificates and attack surface — discover exposed services and vulnerabilities.

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What is the Censys MCP Server?

The Censys MCP Server gives AI agents like Claude, ChatGPT, and Cursor direct access to Censys via 9 tools. Search internet-connected hosts, SSL certificates and attack surface — discover exposed services and vulnerabilities. Powered by the Vinkius - no API keys, no infrastructure, connect in under 2 minutes.

Built-in capabilities (9)

aggregate_hostsget_account_infoget_certificateget_certificate_hostsget_hostget_host_historysearch_certificatessearch_hostsview_host_diff

Tools for your AI Agents to operate Censys

Ask your AI agent "Find all nginx servers in Brazil." and get the answer without opening a single dashboard. With 9 tools connected to real Censys data, your agents reason over live information, cross-reference it with other MCP servers, and deliver insights you would spend hours assembling manually.

Works with Claude, ChatGPT, Cursor, and any MCP-compatible client. Powered by the Vinkius - your credentials never touch the AI model, every request is auditable. Connect in under two minutes.

Why teams choose Vinkius

One subscription gives you access to thousands of MCP servers - and you can deploy your own to the Vinkius Edge. Your AI agents only access the data you authorize, with DLP that blocks sensitive information from ever reaching the model, kill switch for instant shutdown, and up to 60% token savings. Enterprise-grade infrastructure and security, zero maintenance.

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Censys MCP Server capabilities

9 tools

aggregate_hosts

Groups results by a specified field (e.g. "services.port", "location.country", "autonomous_system.name") and returns bucket counts. Useful for understanding the distribution of services, countries or ASNs matching a query. Aggregate host search results by a specific field

get_account_info

Useful for checking remaining API quota and account limits. Get your Censys account information

get_certificate

Returns the full parsed certificate including subject, issuer, validity, key info, extensions, CT logs and raw PEM data. Get detailed info for a specific certificate by fingerprint

get_certificate_hosts

Useful for finding all domains sharing a certificate (SANs). Returns IP addresses, ports and timestamps. Pagination via cursor. Get hosts using a specific certificate

get_host

Returns all open ports, service banners, TLS certificates, operating system detection, geolocation, autonomous system info and last updated timestamps. Get detailed info for a specific IP address

get_host_history

Shows how the host's services, ports and certificates have changed over time. Returns timestamps, services observed and changes detected. Pagination via cursor. Get historical scan data for a specific IP

search_certificates

Supports query syntax: issuer names, subject fields, serial numbers, validity dates, key algorithms, certificate transparency logs and more. Returns fingerprints, subjects, issuers, validity periods and key info. Search for SSL/TLS certificates

search_hosts

Supports powerful query syntax: service names (e.g. "nginx"), ports (e.g. "services.port:443"), protocols, operating systems, autonomous systems, geographic locations and more. Returns IP addresses, open ports, services, banners and locations. Pagination via cursor. Search for internet-connected hosts

view_host_diff

Useful for identifying changes between hosts or finding similar infrastructure. Compare two hosts to see differences

What the Censys MCP Server unlocks

Connect to Censys and explore the world's largest internet scanning platform through natural conversation.

What you can do

Host Search — Search internet-facing hosts by service, port, OS, location and more
Host Details — Get comprehensive info on any IP including all services and certificates
Host History — View how a host's services and ports have changed over time
Certificate Search — Find SSL/TLS certificates by issuer, subject, validity and more
Certificate Details — Get full parsed certificate data by fingerprint
Certificate Hosts — Find all hosts using a specific certificate
Aggregation — Analyze distributions of services, countries and ASNs
Host Diff — Compare two hosts to identify infrastructure differences

How it works

1. Subscribe to this server
2. Enter your Censys API ID and Secret
3. Start exploring internet exposure data from Claude, Cursor, or any MCP-compatible client

Who is this for?

Security Researchers — discover exposed services, track vulnerabilities and analyze attack surfaces
Sysadmins — monitor their organization's external exposure and identify misconfigurations
Threat Hunters — track certificate usage, find related infrastructure and identify suspicious hosts

Frequently asked questions about the Censys MCP Server

How do I get Censys API credentials?

Sign up for a free account at censys.io, go to your account page and generate API credentials. Free tier includes limited queries per day.

What kind of hosts can I find?

Censys scans the entire IPv4 space regularly. You can find web servers, databases, SSH servers, mail servers, IoT devices, industrial control systems and any internet-facing service.

What query syntax is supported?

Censys supports powerful query syntax: service name (services.service_name: HTTP), port (services.port:443), certificate fields (parsed.subject.country: US), OS detection (metadata.os: Linux), ASN, geographic location and boolean operators (AND, OR, NOT).