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Documentation › Develop with MCP › Clients

Build an MCP client
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Documentation › Develop with MCP › Security

Understanding Authorization in MCP
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Documentation › Developer tools › Inspector

MCP Inspector
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Specification

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Specification › Base Protocol

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Specification › Base Protocol › Message Patterns

Overview
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Specification › Base Protocol › Transports

Overview
stdio
Streamable HTTP

Specification › Base Protocol › Authorization

Overview
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Specification › Client Features

Roots
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Specification › Server Features

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Specification › Server Features › Utilities

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Extensions

Extensions Overview
Extension Support Matrix

Extensions › MCP Apps

Overview
Build an MCP App

Extensions › Authorization Extensions

Overview
OAuth Client Credentials
Enterprise-Managed Authorization

Extensions › Tasks

Overview

Extensions › Skills

Overview

Registry

About
Quickstart: Publish a Server
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Registry › Publishing

Package Types
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Registry › Consuming

Registry Aggregators

SEPs

SEP Index

SEPs › Final

SEP-414: Document OpenTelemetry Trace Context Pr…
SEP-932: Model Context Protocol Governance
SEP-973: Expose additional metadata for Implemen…
SEP-985: Align OAuth 2.0 Protected Resource Meta…
SEP-986: Specify Format for Tool Names
SEP-990: Enable enterprise IdP policy controls d…
SEP-991: Enable URL-based Client Registration us…
SEP-994: Shared Communication Practices/Guidelin…
SEP-1024: MCP Client Security Requirements for Lo…
SEP-1034: Support default values for all primitiv…
SEP-1036: URL Mode Elicitation for secure out-of-…
SEP-1046: Support OAuth client credentials flow i…
SEP-1302: Formalize Working Groups and Interest G…
SEP-1303: Input Validation Errors as Tool Executi…
SEP-1319: Decouple Request Payload from RPC Metho…
SEP-1330: Elicitation Enum Schema Improvements an…
SEP-1577: Sampling With Tools
SEP-1613: Establish JSON Schema 2020-12 as Defaul…
SEP-1686: Tasks
SEP-1699: Support SSE polling via server-side dis…
SEP-1730: SDKs Tiering System
SEP-1850: PR-Based SEP Workflow
SEP-1865: MCP Apps - Interactive User Interfaces…
SEP-2085: Governance Succession and Amendment Pro…
SEP-2106: Tools `inputSchema` & `outputSchema` Co…
SEP-2127: MCP Server Cards - HTTP Server Discovery
SEP-2133: Extensions
SEP-2148: MCP Contributor Ladder
SEP-2149: MCP Group Governance and Charter Templa…
SEP-2164: Standardize Resource Not Found Error Co…
SEP-2207: OIDC-Flavored Refresh Token Guidance
SEP-2243: HTTP Header Standardization for Streama…
SEP-2260: Require Server requests to be associate…
SEP-2322: Multi Round-Trip Requests
SEP-2468: Recommend Issuer (iss) Parameter in MCP…
SEP-2484: Require Conformance Tests for Standards…
SEP-2549: TTL for List Results
SEP-2567: Sessionless MCP via Explicit State Hand…
SEP-2575: Make MCP Stateless
SEP-2577: Deprecate Roots, Sampling, and Logging
SEP-2596: Specification Feature Lifecycle and Dep…
SEP-2640: Skills Extension
SEP-2663: Tasks Extension

Community › Get Involved

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Community › Shaping the Protocol

Roadmap
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Community › Governance

Governance and Stewardship
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Community › Working Group Charters

File Uploads Charter
Filesystems Charter
Governance Working Group Charter
Infrastructure Charter
Inspector V2 Working Group Charter
Interceptors Charter
Progressive Disclosure Charter
Registry Charter
SDK Working Group Charter
Server Card Charter
Skills Over MCP Charter
Tasks and Events Charter
Transports Charter

Community › Interest Group Charters

Agents Charter
Authorization Charter
Enterprise Interest Group Charter
Enterprise-Managed Authorization Charter
Financial Services Charter
Scientific Computing Charter
Security Charter
Tool Annotations Charter

Model Context Protocol English

Model Context Protocol

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