fix: prevent Hono from overriding global Response object #1410
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@modelcontextprotocol/client
@modelcontextprotocol/server
@modelcontextprotocol/express
@modelcontextprotocol/hono
@modelcontextprotocol/node
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Pass `overrideGlobalObjects: false` to `getRequestListener()` calls in NodeStreamableHTTPServerTransport to prevent Hono from overwriting the global Response object. This fixes an issue where frameworks like Next.js whose response classes extend the native Response would break after initializing MCP transport, as `instanceof Response` checks would fail. Fixes #1369
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pcarleton
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Jan 20, 2026
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Summary
overrideGlobalObjects: falsetogetRequestListener()calls inNodeStreamableHTTPServerTransportResponseobjectResponseis preserved after transport initializationProblem
When
StreamableHTTPServerTransportis instantiated, Hono'sgetRequestListener()overwrites the globalResponseobject with its own implementation (by default). This breaks frameworks like Next.js whoseNextResponseclass extends the nativeResponse, causinginstanceof Responsechecks to fail.Fixes #1369
Test plan
Responseis not overwritten after transport constructionResponseis not overwritten afterhandleRequestis called