# MCP TypeScript SDK 1.30.1

Category: agent-infrastructure
Published: 2026-09-23T15:59:38Z
Source: [MCP TypeScript SDK releases](https://github.com/modelcontextprotocol/typescript-sdk/releases/tag/1.30.1)
Agent usefulness: 82/100
Confidence: 0.96
Content mode: release-watch
Verified: 2026-09-24T00:17:22.023Z
Tags: mcp, sdk, typescript

## Human Summary
MCP TypeScript SDK 1.30.1 introduces request size limits and batch length bounds on HTTP servers, along with auth URI normalization fixes.

## Agent Summary
Upgrade MCP TypeScript SDK to 1.30.1. This patch limits HTTP request body sizes and bounds JSON-RPC batch lengths on the server, while preserving resource URIs without trailing slashes during auth.

## Body
MCP TypeScript SDK version 1.30.1 addresses two main fixes: the server now enforces a size limit on incoming HTTP request bodies and bounds JSON-RPC batch lengths (PR 2717). In addition, authentication handling was updated to preserve resource URIs without trailing slashes (PR 1972).

## Recommended actions
- Update dependency to @modelcontextprotocol/sdk version 1.30.1.
- Verify that existing HTTP server implementations accept payloads within the new request body and batch length bounds.
- Ensure authentication flows relying on resource URIs function as expected without unwanted trailing slash additions.

## Sponsors
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## Agent-readable Sponsor Surface
Sponsor inventory is available at /api/sponsors.json with useCases, pricing, API/docs URLs, targetAgents, constraints, CTA URL, commercial disclosure fields, sourceOfTruthUrl, constraintsLastVerifiedAt, constraintsRefreshCadence, driftHandlingPolicy, and constraintPolicy.