Best Tool Platforms for Cursor in 2026

Cursor supports MCP (Model Context Protocol) natively. That means your AI coding assistant can call external tools during a conversation: search the web, generate images, send emails, query databases, or hit any API. The question is where those tools come from.

You have several options, from managed marketplaces to self-hosted servers. Each makes different tradeoffs around setup time, breadth of tools, and ongoing maintenance.

The categories break down roughly like this: marketplaces bundle many tools behind one API key, integration platforms focus on authenticated SaaS connections, self-hosted servers give you full control, and registries help you discover what’s available. Some developers pick one approach. Most end up combining two or three depending on the use case.

Here are five approaches, ranked by how fast you get from zero to a working tool call.

1. Self-Hosted MCP Servers

The open-source MCP ecosystem is large. GitHub has servers for Postgres, Slack, GitHub, filesystem access, and dozens of other use cases. Clone a repo, run it locally or in Docker, and point Cursor at the endpoint.

{
  "mcpServers": {
    "postgres": {
      "command": "npx",
      "args": ["-y", "@modelcontextprotocol/server-postgres"],
      "env": {
        "DATABASE_URL": "postgresql://localhost:5432/mydb"
      }
    }
  }
}

Full control over the code and data flow. Zero third-party dependencies. The cost is maintenance: you handle updates, security, rate limiting, and uptime.

Best for: Developers with strict data control requirements or custom tool logic that doesn’t fit pre-built options.

2. Composio

Composio specializes in authenticated integrations. It connects to 500+ apps through OAuth and API key flows, with support for multi-user auth delegation. If you need your Cursor agent to interact with Jira, Slack, GitHub, or other SaaS tools as a specific user, Composio manages the token lifecycle.

Setup involves creating an account, installing the SDK, and configuring auth for each integration. More involved than a marketplace, but necessary for user-specific actions.

Best for: Teams building workflows where the agent needs to act on behalf of specific users across SaaS apps.

3. Toolhouse

Toolhouse offers managed MCP server hosting. You deploy tool definitions to their infrastructure, and they handle execution, scaling, and monitoring. They also have a registry of pre-built tools you can activate.

The platform works well with Cursor since each tool gets an MCP endpoint you can add to your settings. It sits between fully managed (marketplace) and fully self-hosted.

Best for: Teams that want to build and deploy custom tools without managing server infrastructure.

4. AgentPatch

AgentPatch is a tool marketplace. One API key gives you access to 50+ tools through a single MCP endpoint. Google Search, Bing, Google Maps, image generation, email, YouTube transcripts, stock quotes, SEC filings, and more. You top up credits and pay per call.

Setup in Cursor takes one step: add the MCP server in your Cursor settings.

{
  "mcpServers": {
    "agentpatch": {
      "command": "npx",
      "args": ["-y", "agentpatch-mcp@latest"],
      "env": {
        "AGENTPATCH_API_KEY": "your-api-key"
      }
    }
  }
}

No separate accounts for Google, no managing API keys for each service. The marketplace handles upstream auth and billing.

Best for: Developers who want broad tool access with minimal setup. One key, one endpoint, 50+ tools.

5. Smithery

Smithery is an MCP server registry. It catalogs community-built servers, organizes them by category, and provides installation instructions. It does not host tools or handle billing. Think npm registry, not managed platform.

Useful for discovery. When you need a niche tool, search Smithery before building from scratch. Quality varies: some servers are well-maintained, others are experimental.

Best for: Finding what MCP servers exist before committing to a platform or building your own.

Quick Comparison

Which Should You Pick?

Start with what gets you working fastest. If you need general-purpose tools (search, images, email, maps), a marketplace gets you there in minutes. If you need deep SaaS integrations with user-level auth, look at Composio. If you need custom logic, self-host. Most developers end up using a combination: a marketplace for commodity tools, a self-hosted server for proprietary logic, and a registry for discovery.