@modelcontextprotocol/sdk

Model Context Protocol TypeScript SDK by Model Context Protocol

Model Context Protocol implementation for TypeScript

Live Registry Versionv1.32.2Previous: v1.32.1Published 2026-10-23

Stability Grade

B (78/100)

90-Day Velocity

6 releases

Moderate cadence

Dependencies

17 direct

NPM manifest

License

MIT

Verified on NPM

Recommended Exact Pin: npm install @modelcontextprotocol/sdk@1.32.2

NPM Registry ->GitHub Repo ->

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

Model Context Protocol TypeScript SDK (@modelcontextprotocol/sdk) is currently at v1.32.2 on NPM (published 2026-10-23), with a 90-day stability score of 78/100 (B) and HIGH schema drift risk across 6 releases in the past 90 days. Streamable HTTP transport replaces legacy SSEClientTransport defaults; McpServer.registerTool inputSchema requires Zod object shape or JSON Schema draft-2020-12. Production teams should pin npm install @modelcontextprotocol/sdk@1.32.2 rather than using unpinned @latest tags.

Breaking Changes & Tool Schema Drift Analysis

Streamable HTTP transport replaces legacy SSEClientTransport defaults; McpServer.registerTool inputSchema requires Zod object shape or JSON Schema draft-2020-12.

Watched Exports / MCP Tool Signatures:

McpServerStreamableHTTPServerTransportSSEClientTransportregisterTool

Before (Deprecated / Unpinned Pattern)

import { SSEServerTransport } from "@modelcontextprotocol/sdk/server/sse.js";
const transport = new SSEServerTransport("/messages", res);
await server.connect(transport);

After (Verified v1.32.2 Pattern)

import { StreamableHTTPServerTransport } from "@modelcontextprotocol/sdk/server/streamableHttp.js";
const transport = new StreamableHTTPServerTransport({ sessionIdGenerator: () => crypto.randomUUID() });
await server.connect(transport);

Frequently Asked Questions: @modelcontextprotocol/sdk

What is the latest version of @modelcontextprotocol/sdk on NPM?

As of 2026-10-24, the latest stable version of @modelcontextprotocol/sdk (Model Context Protocol TypeScript SDK by Model Context Protocol) on NPM is v1.32.2, published on 2026-10-23. It has shipped 6 releases in the last 90 days.

Does @modelcontextprotocol/sdk v1.32.2 have breaking changes or MCP schema drift risk?

@modelcontextprotocol/sdk currently carries a HIGH schema drift risk rating with a Stability Score of 78/100 (Grade B). Streamable HTTP transport replaces legacy SSEClientTransport defaults; McpServer.registerTool inputSchema requires Zod object shape or JSON Schema draft-2020-12.

How do I safely pin @modelcontextprotocol/sdk in production?

Avoid unpinned @latest tags in production agent configs. Pin the exact verified version using `npm install @modelcontextprotocol/sdk@1.32.2` and monitor McpServer, StreamableHTTPServerTransport, SSEClientTransport, registerTool for parameter or schema changes.

30-Min Registry & Schema Poller

Get Instant Breaking-Change Alerts for @modelcontextprotocol/sdk

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