MCP Docs
Start from what you are trying to do: meet MCP for the first time, build something, connect and run it, or track versions and look things up. Each chapter below opens with the page to read first and lists the pages that follow. All of them describe the current protocol revision, 2026-07-28.
Not sure where to begin? Read What is MCP? and the architecture and roles overview first.
Get Started
What MCP is, how hosts, clients and servers cooperate, and which page to read first.
Develop
Implement a server or a client, pick an SDK, and extend it with agent skills.
Connect and Run
Connect local and remote servers, set authorization and security boundaries, and fix what breaks at runtime.
- Connect a local server
- Connect a remote server
- Authorization with OAuth 2.1
- Local server security defaults
- Security checklist before launch
- Host applications at scale
- Troubleshoot connections and calls
- Inspector: test a server interactively
- Inspector CLI: scripted checks and CI
- Inspector recipes: transports, Docker, config import
Protocol and Versions
Read the versioning rules, see what changed or was deprecated in 2026-07-28, and check which clients support which extensions.
- Version negotiation rules
- Revision and method matrix
- Key changes in 2026-07-28
- Deprecated features
- Legacy and modern protocol eras
- Client extension support matrix
Reference
Look up concept definitions, the client capability matrix, the production checklist, and the Registry publishing flow.
- Tools and Registry overview
- Production checklist
- Client capability matrix
- Tools: definitions and version differences
- Resources: definitions and version differences
- Prompts: definitions and trade-offs
- Sampling: deprecated server requests for client model calls
- Transports: stdio and Streamable HTTP
- Publish a server to the Registry
- Official SEP status index
- SEP impact and method lifecycle guide
Official Sources
When you need exact wording, a historical revision, or the status of a proposal, use the official material below; the Chinese pages are community translations of the English source.