Model Context Protocol Resources MCP Server

<div align="center"> <h1>Model Context Protocol (MCP)</h1> <p><b>A technical overview of the protocol, current to the 2026-07-28 specification.</b></p> </div> <div align="center">

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The MCP overview explains how MCP works: the roles, the wire format, what a server exposes, how servers ask for input, the transports, authorization, and what changed when the protocol went stateless in revision 2026-07-28. It is written for engineers who want a working model of the protocol before reading the specification.

Building a server? @cyanheads/mcp-ts-core is an agent-native TypeScript framework for building MCP servers on the current spec. Every scaffold ships Agent Skills that your coding agent follows to design, test, and release the server, and the server answers legacy and modern clients alike. Scaffold a project with:

bunx @cyanheads/mcp-ts-core init my-mcp-server

Looking for working servers? The servers I maintain are listed on my GitHub profile. The Fleet Map lists every hosted one with its tools, endpoint, and install snippets.

Guides

Guide	Covers
MCP overview	Hosts, clients, and servers; messages and statelessness; tools, resources, and prompts; multi round-trip requests; notifications and caching; stdio and Streamable HTTP; authorization; extensions; security
Legacy vs. modern servers	Revision history from 2024-11-05, what changed in 2026-07-28, deprecations, era compatibility and detection, and a migration checklist for server authors

Agent Skills for server builders

These skills ship with mcp-ts-core and are written for coding agents. They reference the framework's APIs, but the practices carry over to any SDK. Hand one to your agent and ask it to distill the guidance for your stack.

Looking to…	Skill
Design an MCP server: tool surface, resources, and service layer for a domain or API	design-mcp-server
Build a good tool: naming, schemas, response design, errors	add-tool
Audit how your tool descriptions and schemas read to a model	tool-defs-analysis
Shape large or awkward responses: overflow handling, payload shaping, retrieval patterns	techniques
Test a server against live inputs, including adversarial ones	field-test
Review a server for security gaps: prompt injection, input sinks, auth, leakage	security-pass

Official resources

Resource	Link
Specification (2026-07-28)	modelcontextprotocol.io/specification/2026-07-28
Changelog for this revision	Key changes
Deprecated features registry	Deprecated
Schema (source of truth)	schema.ts
Extensions	Extensions overview
Enhancement proposals	SEPs
Server registry	MCP Registry
Debugging	MCP Inspector

Official SDKs: TypeScript · Python · Go · Java · Kotlin · C# · Rust · Swift · Ruby · PHP

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<div align="center"> Maintained by <a href="https://github.com/cyanheads">cyanheads</a>. Independent of the Model Context Protocol project. Apache 2.0. </div>