feat: middleware pattern

Author: mattzcarey

examples/server/package.json

@@ -38,6 +38,7 @@
         "hono": "catalog:runtimeServerOnly",
         "@modelcontextprotocol/examples-shared": "workspace:^",
         "@modelcontextprotocol/server": "workspace:^",
+        "@modelcontextprotocol/express": "workspace:^",
         "cors": "catalog:runtimeServerOnly",
         "express": "catalog:runtimeServerOnly",
         "zod": "catalog:runtimeShared"

examples/server/src/elicitationFormExample.ts

@@ -9,7 +9,7 @@
 
 import { randomUUID } from 'node:crypto';
 
-import { createMcpExpressApp, isInitializeRequest, McpServer, StreamableHTTPServerTransport } from '@modelcontextprotocol/server';
+import { createMcpExpressApp, isInitializeRequest, McpServer, StreamableHTTPServerTransport } from '@modelcontextprotocol/express';
 import { type Request, type Response } from 'express';
 
 // Create MCP server - it will automatically use AjvJsonSchemaValidator with sensible defaults

examples/server/src/elicitationUrlExample.ts

@@ -10,7 +10,7 @@
 import { randomUUID } from 'node:crypto';
 
 import { setupAuthServer } from '@modelcontextprotocol/examples-shared';
-import type { CallToolResult, ElicitRequestURLParams, ElicitResult, OAuthMetadata } from '@modelcontextprotocol/server';
+import type { CallToolResult, ElicitRequestURLParams, ElicitResult, OAuthMetadata } from '@modelcontextprotocol/express';
 import {
     checkResourceAllowed,
     createMcpExpressApp,
@@ -21,7 +21,7 @@ import {
     requireBearerAuth,
     StreamableHTTPServerTransport,
     UrlElicitationRequiredError
-} from '@modelcontextprotocol/server';
+} from '@modelcontextprotocol/express';
 import cors from 'cors';
 import type { Request, Response } from 'express';
 import express from 'express';

examples/server/src/honoWebStandardStreamableHttp.ts

@@ -8,8 +8,8 @@
  */
 
 import { serve } from '@hono/node-server';
-import type { CallToolResult } from '@modelcontextprotocol/server';
-import { McpServer, WebStandardStreamableHTTPServerTransport } from '@modelcontextprotocol/server';
+import type { CallToolResult } from '@modelcontextprotocol/express';
+import { McpServer, WebStandardStreamableHTTPServerTransport } from '@modelcontextprotocol/express';
 import { Hono } from 'hono';
 import { cors } from 'hono/cors';
 import * as z from 'zod/v4';

examples/server/src/inMemoryEventStore.ts

@@ -1,4 +1,4 @@
-import type { EventStore, JSONRPCMessage } from '@modelcontextprotocol/server';
+import type { EventStore, JSONRPCMessage } from '@modelcontextprotocol/express';
 
 /**
  * Simple in-memory implementation of the EventStore interface for resumability

examples/server/src/jsonResponseStreamableHttp.ts

@@ -1,7 +1,7 @@
 import { randomUUID } from 'node:crypto';
 
-import type { CallToolResult } from '@modelcontextprotocol/server';
-import { createMcpExpressApp, isInitializeRequest, McpServer, StreamableHTTPServerTransport } from '@modelcontextprotocol/server';
+import type { CallToolResult } from '@modelcontextprotocol/express';
+import { createMcpExpressApp, isInitializeRequest, McpServer, StreamableHTTPServerTransport } from '@modelcontextprotocol/express';
 import type { Request, Response } from 'express';
 import * as z from 'zod/v4';
 

examples/server/src/mcpServerOutputSchema.ts

@@ -4,7 +4,7 @@
  * This demonstrates how to easily create tools with structured output
  */
 
-import { McpServer, StdioServerTransport } from '@modelcontextprotocol/server';
+import { McpServer, StdioServerTransport } from '@modelcontextprotocol/express';
 import * as z from 'zod/v4';
 
 const server = new McpServer({

examples/server/src/simpleSseServer.ts

@@ -1,5 +1,5 @@
-import type { CallToolResult } from '@modelcontextprotocol/server';
-import { createMcpExpressApp, McpServer, SSEServerTransport } from '@modelcontextprotocol/server';
+import type { CallToolResult } from '@modelcontextprotocol/express';
+import { createMcpExpressApp, McpServer, SSEServerTransport } from '@modelcontextprotocol/express';
 import type { Request, Response } from 'express';
 import * as z from 'zod/v4';
 

examples/server/src/simpleStatelessStreamableHttp.ts

@@ -1,5 +1,5 @@
-import type { CallToolResult, GetPromptResult, ReadResourceResult } from '@modelcontextprotocol/server';
-import { createMcpExpressApp, McpServer, StreamableHTTPServerTransport } from '@modelcontextprotocol/server';
+import type { CallToolResult, GetPromptResult, ReadResourceResult } from '@modelcontextprotocol/express';
+import { createMcpExpressApp, McpServer, StreamableHTTPServerTransport } from '@modelcontextprotocol/express';
 import type { Request, Response } from 'express';
 import * as z from 'zod/v4';
 

examples/server/src/simpleStreamableHttp.ts

@@ -8,7 +8,7 @@ import type {
     PrimitiveSchemaDefinition,
     ReadResourceResult,
     ResourceLink
-} from '@modelcontextprotocol/server';
+} from '@modelcontextprotocol/express';
 import {
     checkResourceAllowed,
     createMcpExpressApp,
@@ -21,7 +21,7 @@ import {
     McpServer,
     requireBearerAuth,
     StreamableHTTPServerTransport
-} from '@modelcontextprotocol/server';
+} from '@modelcontextprotocol/express';
 import type { Request, Response } from 'express';
 import * as z from 'zod/v4';