# Xmcp (xmcp) - AgentBreakWatch Reference

> TL;DR Verdict: 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 last 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.

## Live Telemetry Metadata
- Canonical Page: https://agentbreakwatch.vercel.app/p/xmcp
- Category Hub: https://agentbreakwatch.vercel.app/c/mcp-bridges-devtools (MCP Bridges, Transports, Inspectors & Developer Tools)
- Package Name: `xmcp`
- Registry: NPM (https://www.npmjs.com/package/xmcp)
- GitHub Repository: https://github.com/basementstudio/xmcp
- Vendor: basementstudio
- Latest Live Version: v1.9.0
- Published Date: 2026-10-22T18:42:50.931Z
- 90-Day Release Count: 19
- Direct Dependencies: 0
- License: MIT
- Stability Score: 82/100 (Grade B+)
- Schema Drift Risk: MEDIUM
- Recommended Exact Pin Command: `npx -y xmcp@1.9.0`
- Watched Symbols / MCP Tools: xmcp, tools/list, tools/call
- Snapshot Timestamp: 2026-10-24T12:11:27.697Z

## Breaking Change & Schema Drift Summary
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.

## Migration Diff: Before (Deprecated / Unpinned Pattern)
```
"xmcp": {
  "command": "npx",
  "args": ["-y", "xmcp@latest"]
}
```

## Migration Diff: After (Verified v1.9.0 Pattern)
```
"xmcp": {
  "command": "npx",
  "args": ["-y", "xmcp@1.9.0"]
}
```

## Recent Verified Releases
- v1.9.0 (published 2026-10-22) [LATEST]
- v1.8.0 (published 2026-10-22)
- v1.7.2 (published 2026-10-14)
- v1.7.1 (published 2026-10-09)
- v1.7.0 (published 2026-10-07)
- v1.6.0 (published 2026-10-05)