Shodan API for Internet-Connected Device Discovery and Security

Overview

Shodan provides a search engine and API for discovering and monitoring internet-connected devices and services. Unlike traditional search engines that index content, Shodan indexes network banners, service information, and metadata gathered from ports and protocols exposed to the public internet. This capability allows users to identify specific device types, software versions, open ports, and potential vulnerabilities across a vast range of devices, from webcams and routers to industrial control systems and IoT devices.

The Shodan API allows programmatic access to its extensive database, enabling developers and security professionals to integrate device intelligence directly into their applications and workflows. Use cases include:

• Vulnerability Research: Identifying devices running outdated software or exposed services that may be susceptible to known exploits. For example, a search could reveal all internet-facing servers running a specific version of Apache known to have a critical vulnerability.
• Cybersecurity Awareness: Gaining a broader understanding of an organization's external attack surface by searching for its IP ranges or domain names to discover unintended exposures. This might include discovering development servers inadvertently left public or forgotten test systems.
• IoT Security Auditing: Assessing the security posture of Internet of Things (IoT) deployments by discovering and analyzing connected devices for default credentials or insecure configurations. Shodan can help identify smart devices, such as network cameras or home automation controllers, that are accessible globally.
• Market Research: Analyzing the adoption rates of specific technologies or software versions globally, providing insights into the distribution of various operating systems, web servers, or network devices.

Shodan's core products include the Shodan Search Engine for interactive exploration, the Shodan API for programmatic access, Shodan Monitor for continuous asset tracking, and a directory specifically for Industrial Control Systems (ICS) to aid in critical infrastructure security. The platform is designed for technical users, providing detailed query syntax that facilitates precise data retrieval, such as filtering by country, port, operating system, or specific product banners. The developer experience is supported by documentation and SDKs in multiple programming languages, simplifying interaction with the API.

Key features

• Device Search Engine: Indexes banners and metadata from internet-connected devices, allowing users to search by various criteria such as IP address, port, service, operating system, and geographic location.
• Shodan API: Provides programmatic access to the Shodan database for integrating device intelligence into custom applications and security tools. The API supports various query types including host lookup, search, and bulk data downloads. For detailed API methods, consult the Shodan API reference.
• Shodan Monitor: Enables continuous monitoring of specific IP ranges or networks, alerting users to changes in exposed services or potential vulnerabilities as they appear.
• Industrial Control Systems (ICS) Directory: A specialized feature for identifying and analyzing internet-facing ICS devices, critical for securing industrial infrastructure.
• Exploit Data: Integrates with known vulnerability databases, allowing users to cross-reference discovered devices with potential exploits.
• Data Export: Offers capabilities to download search results and other data in various formats for offline analysis.
• SDKs: Official SDKs are available for Python, Go, Ruby, Node.js, Rust, PowerShell, and C#, simplifying API interactions for developers across different environments. The Python SDK documentation provides examples for common use cases.
• Query Filters: Supports a wide range of filters to refine search queries, including country, port, os, product, org, and many more, allowing for highly specific data discovery.

Pricing

Shodan offers a free tier with limited functionality, suitable for basic exploration. Paid plans scale with credit limits and advanced features. Academic and corporate plans are also available for institutions and larger organizations requiring extensive access.

Pricing as of May 2026. For the most current details, refer to the official Shodan pricing page.

Common integrations

• Security Information and Event Management (SIEM) Systems: Integrating Shodan data into SIEM platforms helps enrich security alerts with external context about exposed assets.
• Vulnerability Management Platforms: Automatically feeding Shodan results into vulnerability scanners or management systems to identify and prioritize exposed vulnerabilities.
• Threat Intelligence Platforms: Combining Shodan's device data with other threat intelligence feeds to create a more comprehensive view of global threats.
• Cloud Security Posture Management (CSPM) Tools: Enhancing CSPM solutions by identifying public-facing cloud resources that may be misconfigured or vulnerable.
• Custom Security Tools: Developers can build custom scripts and applications using the Shodan API to automate asset discovery, auditing, and continuous monitoring tailored to specific organizational needs.

Alternatives

• Censys: Another prominent internet-wide scanner offering similar capabilities for host and certificate discovery and analysis.
• ZoomEye: A Chinese-based cyberspace search engine that indexes devices, websites, and components, providing an alternative perspective on global internet assets.
• Nmap: A free and open-source utility for network discovery and security auditing, primarily focused on local network scanning rather than internet-wide indexing.

Getting started

To begin using the Shodan API with Python, you first need to install the official Shodan library. Then, you can use your API key to initialize the client and perform basic searches. This example demonstrates how to search for devices with "nginx" in their banner and retrieve the first few results. For comprehensive setup and usage, refer to the Shodan developer documentation.

import shodan
import os

# Your Shodan API key
SHODAN_API_KEY = os.getenv("SHODAN_API_KEY", "YOUR_API_KEY_HERE")

try:
    # Setup the API connection
    api = shodan.Shodan(SHODAN_API_KEY)

    # Search Shodan
    # This query finds devices with 'nginx' in their banner
    # and also specifies a geographic filter for Germany.
    results = api.search('nginx country:DE')

    print(f'Results found: {results["total"]}\n')

    # Print the IP address and organization for each host
    # The 'matches' field contains the actual search results.
    for result in results['matches']:
        print(f'IP: {result["ip_str"]}')
        print(f'Organization: {result.get("org", "N/A")}')
        print(f'Port: {result["port"]}')
        # Print the data banner, often contains service details
        print(f'Banner: {result["data"][:150].replace("\n", " ")}...') # Limit to 150 chars
        print('-' * 20)

except shodan.APIError as e:
    print(f'Error: {e}')
except Exception as e:
    print(f'An unexpected error occurred: {e}')

This Python example connects to the Shodan API using an API key (ideally loaded from an environment variable for security), then executes a search query for Nginx servers located in Germany. It iterates through the first set of results, printing key information such as the IP address, organization, listening port, and a snippet of the service banner. The Shodan query syntax, like country:DE, allows for precise filtering of results, which is detailed in the Shodan search filters documentation.