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Add high-level MCP operation interceptor seam #2508

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Add high-level MCP operation interceptor seam #2508

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1692588
Add MCP operation interceptor seam
khandrew1 Jul 16, 2026
5c6f3df
Document interceptor release
khandrew1 Jul 16, 2026
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5 changes: 5 additions & 0 deletions .changeset/mcp-operation-interceptor.md
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---
'@modelcontextprotocol/server': minor
---

Add a high-level `aroundMcpRequest` interceptor for tool, resource, and prompt operations. The interceptor runs after routing and input validation and before output validation, result projection, cache hints, and protocol result processing.
2 changes: 1 addition & 1 deletion packages/server/src/index.ts
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Expand Up @@ -55,7 +55,7 @@ export { PerRequestHTTPServerTransport } from './server/perRequestTransport';
// convenience codec consumers drop into ServerOptions.requestState.verify.
export type { RequestStateCodec, RequestStateCodecOptions } from './server/requestStateCodec';
export { createRequestStateCodec } from './server/requestStateCodec';
export type { ServerOptions } from './server/server';
export type { AroundMcpRequest, McpRequestMethod, ServerOptions } from './server/server';
export { Server } from './server/server';
// subscriptions/listen change-event sourcing seam (protocol revision 2026-07-28).
export type { ServerEvent, ServerEventBus, ServerNotifier } from './server/serverEventBus';
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