截至2026年8月，Model Context Protocol（MCP）在Codex、Cursor、Claude Code、Grok和OpenCode五个AI代码编辑工具中的实现进度存在明显差异，整体支持度为56%1。在工具、提示词和资源等核心功能方面，大多数平台已部分实现1，但Tasks、Apps、Elicitation等高级功能仍处于实验阶段或完全缺失1。
MCP协议本身也在不断演进1。2026年7月28日发布的新版本相比之前的2025年6月18日默认版本，移除了initialize握手和session id等机制1。在具体功能部署上，Claude Code自2026年6月22日起默认启用了Tool Search功能1。此外，各平台对OAuth认证的实现方式存在差异1，而MCP文档在2026年2月1日的更新中列出了Elicitation和Apps的支持情况1。值得注意的是，WebMCP在Chrome 149浏览器中处于Origin trial阶段，该协议在Web环境中的探索性部署已在2026年5月19日启动1。
An evaluation of the Model Context Protocol (MCP) implementation across five leading AI code editing platforms reveals a mixed landscape of capability adoption as of August 20261. The assessment shows a 56% overall support score across Codex, Cursor, Claude Code, Grok, and OpenCode, with core functionalities like Tools, Prompts, and Resources partially implemented on most platforms, while advanced features remain in experimental or unavailable states1.
Core protocol capabilities demonstrate varying levels of maturity across the platforms1. Tools, Prompts, Resources, Roots, and Elicitation have seen partial rollouts, though Tasks, Skills/list, and io.modelcontextprotocol/tasks remain notably absent from implementations1. Authentication mechanisms, particularly OAuth support, are implemented inconsistently across the five platforms1. The protocol underwent significant evolution, with the July 28, 2026 version removing the initialize handshake and session ID requirements compared to the default June 18, 2025 version1.
Recent developments indicate gradual feature expansion in specific implementations1. Claude Code enabled Tool Search by default starting June 22, 2026, marking a step toward broader protocol functionality1. Documentation updates in February 2026 formally acknowledged support for Elicitation and Apps features1. Additionally, WebMCP entered an Origin trial phase in Chrome 149 as of May 19, 2026, suggesting ongoing browser-level protocol integration efforts1.
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