MCP Bridge & Transportnpmmedium schema drift risk

xmcp

Xmcp by basementstudio

The TypeScript MCP framework

Live Registry Versionv1.9.0Previous: v1.8.0Published 2026-10-22

Stability Grade

B+ (82/100)

90-Day Velocity

19 releases

High release cadence

Dependencies

0 direct

NPM manifest

License

MIT

Verified on NPM

Recommended Exact Pin: npx -y xmcp@1.9.0

NPM Registry ->GitHub Repo ->

TL;DR Verdict & Quick Citation Summary (2026-10-24)Source: AgentBreakWatch Live NPM Index

Xmcp (xmcp) is currently at v1.9.0 on NPM (published 2026-10-22), with a 90-day stability score of 82/100 (B+) and MEDIUM schema drift risk across 19 releases in the past 90 days. recent release v1.9.0 (up from v1.8.0) updates MCP Bridge & Transport tool schemas and transport handling (19 releases in last 90d). Pin exact version v1.9.0 in .mcp.json to avoid silent parameter drift. Production teams should pin npx -y xmcp@1.9.0 rather than using unpinned @latest tags.

Breaking Changes & Tool Schema Drift Analysis

recent release v1.9.0 (up from v1.8.0) updates MCP Bridge & Transport tool schemas and transport handling (19 releases in last 90d). Pin exact version v1.9.0 in .mcp.json to avoid silent parameter drift.

Watched Exports / MCP Tool Signatures:

xmcptools/listtools/call

Before (Deprecated / Unpinned Pattern)

"xmcp": {
  "command": "npx",
  "args": ["-y", "xmcp@latest"]
}

After (Verified v1.9.0 Pattern)

"xmcp": {
  "command": "npx",
  "args": ["-y", "xmcp@1.9.0"]
}

Frequently Asked Questions: xmcp

What is the latest version of xmcp on NPM?

As of 2026-10-24, the latest stable version of xmcp (Xmcp by basementstudio) on NPM is v1.9.0, published on 2026-10-22. It has shipped 19 releases in the last 90 days.

Does xmcp v1.9.0 have breaking changes or MCP schema drift risk?

xmcp currently carries a MEDIUM schema drift risk rating with a Stability Score of 82/100 (Grade B+). recent release v1.9.0 (up from v1.8.0) updates MCP Bridge & Transport tool schemas and transport handling (19 releases in last 90d). Pin exact version v1.9.0 in .mcp.json to avoid silent parameter drift.

How do I safely pin xmcp in production?

Avoid unpinned @latest tags in production agent configs. Pin the exact verified version using `npx -y xmcp@1.9.0` and monitor xmcp, tools/list, tools/call for parameter or schema changes.

30-Min Registry & Schema Poller