Best npm MCP Servers
npm is the world's largest software registry, used by JavaScript developers to share and borrow packages for their projects.
Why this server?
Used for package management and running scripts for the MCP server
AlicenseBqualityDmaintenanceA Pyodide server for executing Python code by Large Language Models (LLMs) via the Model Context Protocol (MCP).7654 npm19MITWhy this server?
Supports installation and package management through npm.
AlicenseBqualityDmaintenanceMCP server for fetching, parsing, and managing RSS feeds. Features Fetch and parse RSS/Atom feeds In-memory caching with TTL Batch fetching of multiple feeds Monitor feeds for new items Search content across multiple feeds Extract and format feed content629 npm12Apache 2.0Why this server?
Allows grading MCP servers published on npm by referencing their npm package identifier.

Polygraphofficial
AlicenseAqualityDmaintenanceOpen behavioral litmus for MCP servers — grades A–F across tool-output injection, egress, sensitive-data, and adversarial-input, with reproducible, content-addressed evidence. Tools: run_litmus, verify_attestation.441 npm8Apache 2.0Why this server?
Integrates with the npm registry to retrieve package versions, deprecations, yanks, publish times, publishers, install scripts, and per-version dependencies for npm-based projects, powering vulnerability scans, upgrade impact analysis, and dependency checks.

@4da/mcp-serverofficial
AlicenseAqualityAmaintenanceEnables AI coding agents to learn, from locally read lockfiles, what changes between the dependency version installed and a target version, which of the user's files that upgrade touches, and which vulnerabilities it resolves. It also performs OSV-matched vulnerability scans, ranks upgrade plans, and stores decision memory, running entirely on the user's machine with no account or API keys.11126 npmApache 2.0Why this server?
Facilitates package management and distribution of the MCP server for Chinese company data queries, allowing for easy installation via 'npx'
AlicenseAqualityDmaintenanceUsense Data API now supports the MCP protocol, enabling easy enterprise data access via LLMs through the MCP-compatible usensedata-mcp-server-query-china-company.93 npm5MITWhy this server?
Available as an npm package (@debugg-ai/debugg-ai-mcp) for easy installation and integration

Debugg AI MCPofficial
AlicenseAqualityAmaintenanceZero-Config, Fully AI-Managed End-to-End Testing for all code gen platforms.8360 npm68Apache 2.0Why this server?
Enables installation and distribution of the FindMine MCP server through npm, with support for global installation and direct execution.
AlicenseBqualityCmaintenanceAn MCP server that integrates FindMine's product styling and outfit recommendation capabilities with Claude and other MCP-compatible applications, allowing users to browse products, get outfit recommendations, find similar items, and access style guidance.316 npm1MITWhy this server?
Provides documentation, type information, version comparison, migration guides, and error diagnosis for any npm package.

Augments MCP Serverofficial
AlicenseAqualityDmaintenanceA next-generation framework documentation provider for Claude Code via Model Context Protocol (MCP). Returns types + prose + examples with context-aware formatting for any npm package — not just curated ones.818 npm127MITWhy this server?
The server is distributed as an npm package (@odatano/nightgate-mcp) and can be installed and run via npx or npm.

@odatano/nightgate-mcpofficial
AlicenseAqualityBmaintenanceMCP server that lets AI agents interact with NIGHTGATE, the Midnight blockchain attestation layer, to anchor documents, verify zero-knowledge predicates, manage disclosure grants, and poll async jobs.12206 npm3Apache 2.0