Four MCP Server Marketplaces Compared: Features, Security, and Trade-offs

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Several marketplaces now list MCP (Model Context Protocol) servers, each with distinct strengths: PulseMCP hosts the largest catalog at 21,000+ entries by aggregating multiple sources, while Smithery offers around 3,000 curated servers with a simple CLI installer. Glama provides algorithmic quality scores based on GitHub metrics such as stars and maintenance activity, though these do not reflect actual security testing. MarketNow, built by the article's author, is the only platform that security-audits every listed server through a multi-layer pipeline called Sentinel, issuing signed SHA-256 certificates scored from 0 to 10. However, MarketNow has a smaller catalog, charges for some features, and has not yet undergone third-party auditing. The author notes that no marketplace currently verifies that a GitHub repository matches its published npm package or tests for prompt injection at the protocol level, highlighting that discovery is largely solved but trust remains an open problem.

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