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, 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.