MCP Servers
Best MCP Servers and Tool Integration Options
MCP servers expose tools and context through a shared protocol so agents can connect to local apps, SaaS systems, and private data.
Search intent: Understand when MCP is better than custom tool glue and what to evaluate before exposing tools to agents.
Last reviewed
May 11, 2026
Tools considered
3
Open source options
3
Definition
An MCP server is a boundary around capabilities: it describes tools, resources, and prompts in a way MCP clients can discover and call.
Use cases
- Connecting coding agents to repositories and issue trackers
- Giving desktop agents controlled access to local files
- Standardizing SaaS tool access across multiple agent clients
Selection criteria
- Does the server enforce auth and permission boundaries?
- Are tool schemas narrow, typed, and auditable?
- Can the server be observed and rate limited in production?
Selection advice
Use MCP when you need reusable tool access across clients; use direct function calling when one app owns both the agent and the tool surface.