typescript-sdk: The official TypeScript SDK for Model Context Protocol servers and clients

by modelcontextprotocol · MCP Server · ★ 13.7k

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Security audit verdict: SAFE · quality 74/100

None of the 42 rules matched — no credential harvesting, no data exfiltration, no curl-pipe-shell installer. Scanned against 42 published rules built on the SlowMist agent-security taxonomy, refreshed every 8 hours. Full audit →

The quality score combines nine heuristic checks of the repo and its README: completeness, clarity, specificity, examples, structure, agent readiness, step-by-step content, instruction quality and security notes. It rates how well the project explains itself to an agent, not the code.

mcpmcp-clientmcp-servertypescript

Quick Facts

Stars13,713
Forks2,367
LanguageTypeScript
CategoryMCP Server
Quality Score74/100
Open Issues646
Last Updated2026-11-05
Created2024-09-24
Platformsmcp, node
Est. Tokens~15k

About typescript-sdk

MCP TypeScript SDK [!IMPORTANT] This is the branch which contains v2 of the SDK (currently in development, pre-alpha). We anticipate a stable v2 release in Q1 2026. Until then, v1.x remains the recommended version for production use. v1.x will continue to receive bug fixes and security updates for at least 6 months after v2 ships to give people time to upgrade.

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How this security grade is produced

Grades come from a rule-based scan built on the SlowMist agent-security taxonomy: 42 published rules, covering credential harvesting, data exfiltration, curl | sh installers and more. It is a first-layer scan, not a manual audit — we say so rather than overstate it.

The scale of the problem is documented independently: Liu et al. (2026), in a study of 31,132 agent skills, report that 26.1% contain security vulnerabilities. Our own full-catalog census is published as a citable open dataset.

Sources & who's responsible:

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