# MCP Server

> **TL;DR.** An [MCP server](https://modelcontextprotocol.

- **Category:** AI / Developer Tools / Infrastructure
- **Stage:** established
- **Age:** 555 days
- **Origin date:** 2024-11-25
- **First detected:** 2026-04-16
- **Canonical URL:** https://earlyterms.com/term/mcp-server
- **Sources:** 10 primary URLs

## Definition

An [MCP server](https://modelcontextprotocol.io/) is a small, standalone program that exposes one capability — a database, a filesystem, a security scanner, a trading API — to AI agents over the [Model Context Protocol](https://www.anthropic.com/news/model-context-protocol). The protocol defines the JSON-RPC-2.0 wire format; the server is the shipping unit. In 2026 'MCP server' has hardened from an implementation detail into a product category.

The pivot moment is the tooling layer forming around these servers. The [official MCP Registry](https://registry.modelcontextprotocol.io/) launched in preview September 8, 2025, and third-party directories — PulseMCP, Smithery, Glama, MCP.so, Kong — now compete to be the 'app store for AI agents'. Glama alone indexes 21,000+ servers; Anthropic reports 10,000+ active public servers.

## Example

SafeWeave ships as an MCP server exposing eight security scanners (secret detection, SAST, SCA, IaC, container, SBOM, license, dependency-risk) inside Cursor and Claude Code. Adjacent examples: l6e (token-budget enforcement), MCPTube (YouTube transcript search), Covalence (Mac app bundling an MCP server with a local vector DB), and LeftGlove (makes websites usable by AI agents via `npx leftglove`).

## Analogy

A Chrome extension for AI agents — small, single-purpose, installed per-user, multiplied into a long tail.

## Why it's emerging now

Client-side MCP adoption hit critical mass (ChatGPT, Cursor, Gemini, Copilot, VS Code all speak it), the official Registry launched Sep 2025, 21k+ servers now indexed on Glama — and security scrutiny (BlueRock's 8,000-server scan, CVE-2026-26118, MCPwnfluence) is arriving simultaneously, making 'MCP server' the operative noun for AI-agent infra.

## Related terms

- *parent:* Model Context Protocol
- *related:* MCP client
- *related:* MCP registry
- *related:* MCP marketplace
- *related:* Managed Agents
- *related:* Claude Agent SDK
- *parent:* agent tooling
- *related:* tool calling
- *related:* JSON-RPC 2.0
- *related:* Agentic AI Foundation

## Sources

1. [Anthropic — Introducing the Model Context Protocol](https://www.anthropic.com/news/model-context-protocol)
2. [Model Context Protocol specification (2025-11-25)](https://modelcontextprotocol.io/specification/2025-11-25)
3. [MCP Registry preview announcement](https://blog.modelcontextprotocol.io/posts/2025-09-08-mcp-registry-preview/)
4. [Anthropic — Donating MCP and establishing the Agentic AI Foundation](https://www.anthropic.com/news/donating-the-model-context-protocol-and-establishing-of-the-agentic-ai-foundation)
5. [Wikipedia — Model Context Protocol](https://en.wikipedia.org/wiki/Model_Context_Protocol)
6. [HN: MCP server that reduces Claude Code context consumption by 98%](https://news.ycombinator.com/item?id=47193064)
7. [Pluto Security — MCPwnfluence (CVE-2026-27825) Atlassian MCP SSRF-to-RCE](https://pluto.security/blog/mcpwnfluence-cve-2026-27825-critical/)
8. [vulnerablemcp.info — MCP-specific CVE database](https://vulnerablemcp.info/)
9. [Glama MCP server registry (21,000+ servers)](https://glama.ai/mcp/servers)
10. [modelcontextprotocol/servers — reference implementations](https://github.com/modelcontextprotocol/servers)

---
_Generated by EarlyTerms · https://earlyterms.com/term/mcp-server_