NS Lookup MCP Server

Overview

The NS Lookup MCP Server bridges the gap between traditional DNS resolution tools and modern AI‑driven workflows. By exposing the ubiquitous command through a lightweight REST API, it allows AI assistants and applications to perform both forward (hostname → IP) and reverse (IP → hostname) lookups without leaving the MCP ecosystem. This capability is essential for developers who need real‑time network information, such as validating domain configurations, troubleshooting connectivity issues, or enriching data pipelines with authoritative DNS records.

The server’s design is intentionally minimalistic: it runs as a single microservice written in Python, leveraging contemporary tooling (, ) for fast startup and dependency management. Once running, the MCP client can invoke the tool by sending a structured JSON payload that specifies a hostname and an optional DNS server. The service supports custom server selection, enabling clients to query authoritative nameservers or public resolvers like Google’s and Cloudflare’s . The output is deliberately concise—each lookup returns a clean, human‑readable block containing the resolved IP(s), canonical name, and any reverse mapping—making it straightforward for AI assistants to parse and present results.

For developers integrating AI assistants, this MCP server offers several practical advantages. First, it eliminates the need to bundle native DNS libraries or invoke shell commands directly from the assistant’s environment; the MCP abstraction handles execution, error handling, and output formatting. Second, it provides a standardized interface that can be queried from any language or platform supported by MCP, ensuring consistent behavior across diverse workflows. Finally, the server’s configurability allows teams to enforce DNS policies—such as restricting lookups to internal resolvers or monitoring query patterns—without modifying the assistant’s core logic.

Typical use cases include:

• Automated network diagnostics where an AI assistant asks for the IP of a domain or verifies that a service’s reverse DNS matches its hostname.
• Security tooling that cross‑references IP addresses against threat intelligence feeds, requiring quick DNS resolution to correlate alerts.
• DevOps pipelines that validate domain ownership or check for misconfigured DNS records before deploying changes.

By encapsulating within the MCP framework, the NS Lookup MCP Server provides a reliable, secure, and developer‑friendly gateway to DNS data—streamlining integration into AI‑augmented applications and enhancing the overall intelligence of network‑aware assistants.