MCP Server
Industry Definition Set • Entity Resolution Path: /glossary/mcp-server
Quick Answer / TL;DR
An application that implements the Model Context Protocol, hosting tools, resources, and prompt templates, responding to JSON-RPC requests from compliant AI clients.
Key Takeaways
- The source of capabilities and system context.
- Requires minimal system footprint and can run locally or in secure cloud containers.
- Must validate all arguments strictly to protect host resources.
- Can easily integrate standard APIs, databases, or local scripts.
Definitive Statement: An application that implements the Model Context Protocol, hosting tools, resources, and prompt templates, responding to JSON-RPC requests from compliant AI clients.
Technical Context & Protocol Usage
- Detailed Explanation
- An MCP Server is the provider of capability and context. It can be written in any language (e.g., TypeScript/Node.js, Python, Go, Rust) and exposes a defined set of actions. When initialized, it responds to the client's request by listing its available tools (using 'tools/list'), resources (using 'resources/list'), and templates. It then stands ready to execute tools or retrieve datasets securely.
Format & Payload Metadata
Format: Model Context Protocol SDK compliant
Latency: Directly bounded by underlying query execution speeds
Real-World Implementation Use Case
A Python server running on your database server that safely executes SQL queries and formats the results for a model.
Cite This Page
MLA Style:
MCPserver.in Engineering. "MCP Server." MCPserver.in Knowledge Hub, 15 July 2026, mcpserver.in/glossary/mcp-server.
Related Terms
Model Context Protocol (MCP)
An open, secure protocol that standardizes how artificial intelligence agents and large language models (LLMs) exchange context, tools, prompts, and data resources with external servers.
JSON-RPC 2.0
A lightweight, stateless remote procedure call (RPC) protocol defined in JSON that utilizes request, response, and notification message frames.
Stdio Transport (Standard Input/Output)
A local-only transport mechanism where the AI client spawns the MCP server as a child process and communicates via standard input (stdin) and standard output (stdout) channels.
SSE Transport (Server-Sent Events)
A lightweight, unidirectional HTTP-based streaming protocol used by remote MCP servers to push messages to AI clients, with client-to-server writes sent over standard POST requests.
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