--- title: "Official Ruby SDK for MCP reaches Tier 1 | Agent MCP Directory" description: "Official Ruby SDK for MCP reaches Tier 1. The MCP project moved the official Ruby SDK to Tier 1 under its SDK tiering system." canonical: https://agentmcpdirectory.com/news/2026-10-30-official-ruby-sdk-for-mcp-reaches-tier-1 site: "Agent MCP Directory" last_updated: 2026-11-04 date: 2026-10-30 section: "News" --- # Official Ruby SDK for MCP reaches Tier 1 | Agent MCP Directory > Official Ruby SDK for MCP reaches Tier 1. The MCP project moved the official Ruby SDK to Tier 1 under its SDK tiering system. Source: https://agentmcpdirectory.com/news/2026-10-30-official-ruby-sdk-for-mcp-reaches-tier-1 Site: Agent MCP Directory Last reviewed: 2026-11-04 # Official Ruby SDK for MCP reaches Tier 1 The MCP project moved the official Ruby SDK to Tier 1 under its SDK tiering system, three months after its 1.0 release. Reported 30 October 2026 by blog.modelcontextprotocol.io, read 4 November 2026. The full text of Official Ruby SDK for MCP reaches Tier 1 is at the source linked below. ## What it changes in the data held here The connector log shows which protocol revisions the directory's reachable servers answered with: 189 on 2025-11-25, 40 on 2025-06-18, 16 on 2026-07-28, 11 on 2025-03-26, 9 on 2024-11-05. Servers on 2025-11-25 still use the initialize handshake that 2026-07-28 removes. Source: [blog.modelcontextprotocol.io](https://blog.modelcontextprotocol.io/posts/ruby-sdk-tier-1/), a primary source, dated 30 October 2026 and read 4 November 2026. The opening paragraph above is the item; the figures in this section come from this directory's own run of 4 November 2026. ## Where it shows up here - [MCP, the standard](https://agentmcpdirectory.com/standards/mcp/) Edition 4 November 2026 Method [How rows are verified](https://agentmcpdirectory.com/method/) Data [CSV and JSON](https://agentmcpdirectory.com/data/) Markdown [This page as markdown](https://agentmcpdirectory.com/news/2026-10-30-official-ruby-sdk-for-mcp-reaches-tier-1/index.md) ## Sources - [Official Ruby SDK for MCP reaches Tier 1](https://blog.modelcontextprotocol.io/posts/ruby-sdk-tier-1/), read 4 November 2026 (primary source) Last reviewed 4 November 2026