8 Best MCP Marketplaces to Discover MCP Servers

The Model Context Protocol (MCP), an open standard released by Anthropic in late 2024, lacks an official marketplace, leading to a fragmented discovery landscape with third-party directories tracking between 3,000 and 37,000 servers as of mid-2026. A user's evaluation of eight sources ranks the Official MCP Registry, Smithery, Glama, MCP360, and mcp.so as top options for finding and vetting MCP servers, each serving distinct use cases from prototyping to production deployment.

A few months back I needed one thing. A server that could read Google Search Console data into an agent without me exporting a CSV first. I typed “MCP server” into a search bar and got back a dozen different directories, none of which agreed on how many servers actually existed or which ones were any good. That’s when I stopped treating MCP discovery as a single search and started treating it as a stack of sources, each one good at a different part of the job. Quick context if you’re new to this. MCP, short for Model Context Protocol, is the open standard Anthropic released in late 2024 that lets an AI agent connect directly to the tools you already use. The protocol itself doesn’t ship a marketplace. Discovery got outsourced to a handful of third parties, and by mid-2026 those third parties were tracking anywhere from 3,000 to 37,000 servers depending on who’s counting. Here are the eight sources I actually check, numbered in the order I’d recommend trying them. The Official MCP Registry https://registry.modelcontextprotocol.io/ is the canonical, spec-defined index of MCP servers. Anthropic, GitHub, PulseMCP, and Microsoft maintain it jointly, and it’s built to be queried by AI clients programmatically rather than browsed by a person. A publisher lists a server there by proving ownership of a GitHub account or domain, then publishing a server.json record under that verified namespace. Confirming that a server claiming to be an official integration, Stripe, GitHub, Notion, actually is one, before you connect it to anything that touches production data. Free and open. Smithery https://smithery.ai/ is a public MCP server registry and hosting platform with more than 3,000 verified listings as of mid-2026. It focuses on getting a server running fast, either installed locally through its CLI or run remotely on Smithery’s own infrastructure, with built-in OAuth handling for servers that need authentication. Prototyping. When I want to know within the next ten minutes whether an agent workflow is even worth building, Smithery gets me from search to working connection faster than any other source on this list. Freemium. Glama https://glama.ai/ is an MCP registry, in-browser inspector, and gateway, indexing close to 37,000 servers pulled automatically from GitHub rather than relying on manual submissions. Beyond the listing, it includes a quality and safety scoring system with maintainer verification, plus a managed gateway with logging and per-tool access control for servers you decide to trust. Vetting a candidate server before I connect it to anything real, since Glama’s in-browser inspector lets me test a server’s tools without installing them first. Freemium. MCP360 https://mcp360.ai is a gateway, not a directory. It sits in front of the servers you’ve already chosen and exposes them to your agent through a single connection, loading each server’s tool definitions on demand rather than front-loading every schema from every connected server into context on every call. I should say upfront that I write about this one because I work with it. Once I’ve picked four or five servers from the directories above, I route them through MCP360 so the agent isn’t carrying tool definitions for servers it doesn’t need in that particular turn. The difference shows up first in token cost and second in how reliably the agent picks the right tool when several similar options are available. Freemium. mcp.so https://mcp.so/ is a third-party MCP marketplace with more than 17,000 servers listed, alongside a playground for testing a server before you commit to installing it and its own blog that pulls in independent search traffic. Casting the widest possible net when I’m exploring a category I don’t know well yet, keyword research tools or scraping servers, since almost nothing is missing from the catalog. Free to browse and use. Composio https://composio.dev/ is a managed integration platform, not a browsable directory. It ships more than 500 pre-built toolkits and handles the authentication layer MCP doesn’t include natively, OAuth, API key management, and role-based access control, then routes requests through a single Tool Router endpoint that selects the right tool for a given task. Client work where I don’t want to own the auth flow for every service being connected. It trades the browse-and-compare feel of a directory for session management and observability I’d otherwise have to build myself. Freemium PulseMCP https://www.pulsemcp.com/ is a hand-curated MCP directory with close to 7,000 listed servers, built around human review rather than an automated crawl. It also tracks estimated weekly visitor counts per server, a signal none of the automated directories surface. Getting a second, human opinion on a server before I trust results pulled from Glama or mcp.so’s automated crawls. Free to browse. MintMCP https://www.mintmcp.com is a SOC 2 Type II audited, hosted MCP runtime built for governance rather than breadth. It isn’t an automation suite or an integration marketplace, and it doesn’t abstract MCP behind a workflow layer. It exposes the servers you’ve already chosen to your agent through SSO, SCIM-driven role-based access, and audit logging, while keeping interactions close to the raw protocol. Compliance-heavy environments where you already know exactly which servers you want and need a documented, auditable trail of what an agent touched and when. Freemium with enterprise contracts. None of these eight sources cover discovery, verification, and runtime efficiency at once. Directories like Smithery, Glama, mcp.so, and PulseMCP get you to a candidate list. Platforms like Composio and MintMCP handle authentication and governance once a server is chosen. A gateway like MCP360 keeps things running efficiently once you’ve got more than one or two servers connected to the same agent. Worth knowing before you install anything from any of them. A recent scan across more than 8,000 public MCP servers found over a third carrying SSRF vulnerabilities, and a meaningful share with unsafe command execution paths or no authentication at all. Check the maintenance history, read the permissions a server actually requests, and sandbox anything new before you hand it production credentials. If you’re starting out, check Smithery or Glama first since they’re the fastest path to a working connection. Add a gateway once you’re comfortable letting an agent juggle more than one tool at a time. 8 Best MCP Marketplaces to Discover MCP Servers https://pub.towardsai.net/8-best-mcp-marketplaces-to-discover-mcp-servers-fb6cb082efcb was originally published in Towards AI https://pub.towardsai.net on Medium, where people are continuing the conversation by highlighting and responding to this story.