There are over 12,000 MCP servers scattered across a dozen directories. Two of the largest are mcp.so and PulseMCP. They solve the discovery problem differently — here is how they compare and when to reach for each.
mcp.so — breadth
mcp.so indexes a very large catalogue, optimised for coverage and search-engine reach. If a server exists, it is probably listed here.
- Strength: comprehensiveness. The widest net.
- Weakness: flat listing. Little curation, no role-based grouping, and quality varies widely — you sift.
PulseMCP — freshness and review
PulseMCP lists thousands of servers with a weekly newsletter and more hands-on review.
- Strength: quality-filtered, hand-reviewed results and fresh data. A good first stop for "what is good right now."
- Weakness: still a flat directory at heart; not organised around what you are trying to build.
How to choose
- Start with PulseMCP for quality-filtered, current picks.
- Escalate to mcp.so (or Glama) when you need broad coverage or a niche server.
- Cross-check anything you will give real credentials against the official MCP Registry.
The gap both leave open
Directories answer "what servers exist," not "what should I install for my role." A 2026 security analysis of ~7,000 public servers found many require no authentication and a minority use OAuth — so picking by popularity alone is risky. That is why curated, role-based stacks and a security check matter.
A different angle
Loadout groups servers into tested, role-based loadouts and runs a security inspector so you are not vetting raw lists by hand. Browse by category, or read best MCP servers for Cursor for opinionated picks. Want to evaluate registries deeper? See trusted MCP registry providers.