docs: streamable server sample (#595)

- add a simple streamable http server example with auth
- update readme: replace quickstart example from sse server to
streamable server
- add readme files for samples, simple-streamable-server, notebooks

closes #170 

## How Has This Been Tested?
knit and inspector

## Breaking Changes
NaN

## Types of changes
- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [x] Documentation update

## Checklist
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [ ] I have added appropriate error handling
- [x] I have added or updated documentation as needed

samples/simple-streamable-server/README.md

@@ -0,0 +1,75 @@
+# Simple Streamable HTTP Server
+
+A minimal MCP server using the recommended Streamable HTTP transport with optional Bearer token authentication.
+
+## Overview
+
+This sample demonstrates a Streamable HTTP MCP server built with Ktor. It exposes tools, a prompt
+template, and a resource over HTTP, and optionally supports Bearer token authentication. The
+`multi-greet` tool showcases server-to-client logging notifications with streaming delays.
+
+## Prerequisites
+
+- JDK 17+
+
+## Build & Run
+
+### Without authentication
+
+```shell
+./gradlew run
+```
+
+The server starts on `http://localhost:3001/mcp` by default.
+
+Connect with the [MCP Inspector](https://modelcontextprotocol.io/docs/tools/inspector):
+
+```shell
+npx @modelcontextprotocol/inspector
+```
+
+In the Inspector UI, select **Streamable HTTP** transport and enter `http://localhost:3001/mcp`.
+
+Pass a port number as an argument to change it:
+
+```shell
+./gradlew run --args="8080"
+```
+
+### With authentication
+
+```shell
+MCP_AUTH_TOKEN=my-secret ./gradlew run --args="--auth"
+```
+
+When `--auth` is passed, clients must include an `Authorization: Bearer <token>` header.
+The token is read from the `MCP_AUTH_TOKEN` environment variable (required when `--auth` is used).
+
+### Authentication caveats
+
+This sample is intended **for demonstration only**. In production you should:
+
+- Use a proper identity provider instead of a static token.
+- Restrict CORS origins to your deployment domain — the sample allows all origins.
+- Serve the endpoint over HTTPS.
+
+## MCP Capabilities
+
+### Tools
+
+| Name | Description |
+|------|-------------|
+| `greet` | Returns a greeting for a given `name`. |
+| `multi-greet` | Sends logging notifications between delayed greetings, demonstrating streaming. |
+
+### Prompts
+
+| Name | Description |
+|------|-------------|
+| `greeting-template` | Generates a friendly greeting message for a given `name`. |
+
+### Resources
+
+| Name | URI | Description |
+|------|-----|-------------|
+| `Default Greeting` | `https://example.com/greetings/default` | Returns a static "Hello, world!" text. |

samples/simple-streamable-server/build.gradle.kts

@@ -0,0 +1,29 @@
+plugins {
+    alias(libs.plugins.kotlin.jvm)
+    alias(libs.plugins.kotlin.serialization)
+    alias(libs.plugins.shadow)
+    application
+}
+
+group = "org.example"
+version = "0.1.0"
+
+application {
+    mainClass.set("io.modelcontextprotocol.sample.server.MainKt")
+}
+
+dependencies {
+    implementation(dependencies.platform(libs.ktor.bom))
+    implementation(libs.mcp.kotlin.server)
+    implementation(libs.ktor.server.netty)
+    implementation(libs.ktor.server.auth)
+    implementation(libs.ktor.server.cors)
+    implementation(libs.ktor.server.content.negotiation)
+    implementation(libs.ktor.server.sse)
+    implementation(libs.ktor.serialization.kotlinx.json)
+    implementation(libs.slf4j.simple)
+}
+
+kotlin {
+    jvmToolchain(17)
+}

samples/simple-streamable-server/gradle.properties

@@ -0,0 +1,5 @@
+org.gradle.configuration-cache=true
+org.gradle.parallel=true
+org.gradle.caching=true
+
+#mcp.kotlin.overrideVersion=0.0.1-SNAPSHOT

samples/simple-streamable-server/gradle/libs.versions.toml

@@ -0,0 +1,22 @@
+[versions]
+kotlin = "2.2.21"
+ktor = "3.2.3"
+mcp-kotlin = "0.9.0"
+slf4j = "2.0.17"
+shadow = "9.2.2"
+
+[libraries]
+ktor-bom = { group = "io.ktor", name = "ktor-bom", version.ref = "ktor" }
+ktor-server-netty = { group = "io.ktor", name = "ktor-server-netty" }
+ktor-server-cors = { group = "io.ktor", name = "ktor-server-cors" }
+ktor-server-content-negotiation = { group = "io.ktor", name = "ktor-server-content-negotiation" }
+ktor-serialization-kotlinx-json = { group = "io.ktor", name = "ktor-serialization-kotlinx-json" }
+ktor-server-auth = { group = "io.ktor", name = "ktor-server-auth" }
+ktor-server-sse = { group = "io.ktor", name = "ktor-server-sse" }
+mcp-kotlin-server = { group = "io.modelcontextprotocol", name = "kotlin-sdk-server", version.ref = "mcp-kotlin" }
+slf4j-simple = { group = "org.slf4j", name = "slf4j-simple", version.ref = "slf4j" }
+
+[plugins]
+kotlin-jvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
+kotlin-serialization = { id = "org.jetbrains.kotlin.plugin.serialization", version.ref = "kotlin" }
+shadow = { id = "com.gradleup.shadow", version.ref = "shadow" }

samples/simple-streamable-server/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.3.1-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

samples/simple-streamable-server/gradlew

@@ -0,0 +1,248 @@
+#!/bin/sh
+
+#
+# Copyright © 2015 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

samples/simple-streamable-server/gradlew.bat

@@ -0,0 +1,93 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

samples/simple-streamable-server/settings.gradle.kts

@@ -0,0 +1,25 @@
+rootProject.name = "simple-streamable-server"
+
+plugins {
+    // Apply the foojay-resolver plugin to allow automatic download of JDKs
+    id("org.gradle.toolchains.foojay-resolver-convention") version "1.0.0"
+}
+
+dependencyResolutionManagement {
+    repositories {
+        mavenLocal()
+        mavenCentral()
+    }
+
+    versionCatalogs {
+        create("libs") {
+            val mcpKotlinVersion = providers.gradleProperty(
+                "mcp.kotlin.overrideVersion",
+            ).orNull
+            if (mcpKotlinVersion != null) {
+                logger.lifecycle("Using the override version $mcpKotlinVersion of MCP Kotlin SDK")
+                version("mcp-kotlin", mcpKotlinVersion)
+            }
+        }
+    }
+}

samples/simple-streamable-server/src/main/kotlin/io/modelcontextprotocol/sample/server/main.kt

@@ -0,0 +1,28 @@
+package io.modelcontextprotocol.sample.server
+
+import io.ktor.server.engine.embeddedServer
+import io.ktor.server.netty.Netty
+
+fun main(vararg args: String) {
+    val authEnabled = args.any { it == "--auth" }
+    val port = args.firstOrNull { it != "--auth" }?.toIntOrNull() ?: 3001
+    val authToken = if (authEnabled) {
+        val envToken = System.getenv("MCP_AUTH_TOKEN")
+        requireNotNull(envToken) {
+            "MCP_AUTH_TOKEN environment variable must be set when using --auth"
+        }
+        envToken
+    } else {
+        null
+    }
+
+    println("Starting MCP Streamable HTTP server on port $port")
+    println("Use MCP inspector to connect to http://localhost:$port/mcp")
+    if (authToken != null) {
+        println("Bearer auth enabled (token sourced from MCP_AUTH_TOKEN)")
+    }
+
+    embeddedServer(Netty, host = "127.0.0.1", port = port) {
+        configureServer(authToken)
+    }.start(wait = true)
+}

samples/simple-streamable-server/src/main/kotlin/io/modelcontextprotocol/sample/server/server.kt

@@ -0,0 +1,297 @@
+package io.modelcontextprotocol.sample.server
+
+import io.ktor.http.HttpHeaders
+import io.ktor.http.HttpMethod
+import io.ktor.http.HttpStatusCode
+import io.ktor.serialization.kotlinx.json.json
+import io.ktor.server.application.Application
+import io.ktor.server.application.ApplicationCall
+import io.ktor.server.application.install
+import io.ktor.server.auth.Authentication
+import io.ktor.server.auth.authenticate
+import io.ktor.server.auth.bearer
+import io.ktor.server.plugins.contentnegotiation.ContentNegotiation
+import io.ktor.server.plugins.cors.routing.CORS
+import io.ktor.server.request.header
+import io.ktor.server.response.respond
+import io.ktor.server.routing.delete
+import io.ktor.server.routing.post
+import io.ktor.server.routing.route
+import io.ktor.server.routing.routing
+import io.ktor.server.sse.SSE
+import io.ktor.server.sse.sse
+import io.ktor.util.collections.ConcurrentMap
+import io.modelcontextprotocol.kotlin.sdk.server.Server
+import io.modelcontextprotocol.kotlin.sdk.server.ServerOptions
+import io.modelcontextprotocol.kotlin.sdk.server.StreamableHttpServerTransport
+import io.modelcontextprotocol.kotlin.sdk.server.mcpStreamableHttp
+import io.modelcontextprotocol.kotlin.sdk.types.CallToolResult
+import io.modelcontextprotocol.kotlin.sdk.types.GetPromptResult
+import io.modelcontextprotocol.kotlin.sdk.types.Implementation
+import io.modelcontextprotocol.kotlin.sdk.types.LoggingLevel
+import io.modelcontextprotocol.kotlin.sdk.types.LoggingMessageNotification
+import io.modelcontextprotocol.kotlin.sdk.types.LoggingMessageNotificationParams
+import io.modelcontextprotocol.kotlin.sdk.types.McpJson
+import io.modelcontextprotocol.kotlin.sdk.types.PromptArgument
+import io.modelcontextprotocol.kotlin.sdk.types.PromptMessage
+import io.modelcontextprotocol.kotlin.sdk.types.ReadResourceResult
+import io.modelcontextprotocol.kotlin.sdk.types.Role
+import io.modelcontextprotocol.kotlin.sdk.types.ServerCapabilities
+import io.modelcontextprotocol.kotlin.sdk.types.TextContent
+import io.modelcontextprotocol.kotlin.sdk.types.TextResourceContents
+import io.modelcontextprotocol.kotlin.sdk.types.ToolAnnotations
+import io.modelcontextprotocol.kotlin.sdk.types.ToolSchema
+import kotlinx.coroutines.delay
+import kotlinx.serialization.json.JsonPrimitive
+import kotlinx.serialization.json.buildJsonObject
+import kotlinx.serialization.json.jsonPrimitive
+import kotlinx.serialization.json.put
+import kotlinx.serialization.json.putJsonObject
+import kotlin.time.Duration.Companion.milliseconds
+
+private const val MCP_SESSION_ID_HEADER = "mcp-session-id"
+
+fun Application.configureServer(authToken: String? = null) {
+    installCors(authEnabled = authToken != null)
+    install(ContentNegotiation) {
+        json(McpJson)
+    }
+
+    if (authToken == null) {
+        mcpStreamableHttp {
+            createMcpServer()
+        }
+    } else {
+        configureAuthenticatedMcp(authToken)
+    }
+}
+
+private fun Application.configureAuthenticatedMcp(authToken: String) {
+    install(SSE)
+    install(Authentication) {
+        bearer("mcp-bearer") {
+            authenticate { credential ->
+                if (credential.token == authToken) {
+                    io.ktor.server.auth.UserIdPrincipal("mcp-client")
+                } else {
+                    null
+                }
+            }
+        }
+    }
+
+    val transports = ConcurrentMap<String, StreamableHttpServerTransport>()
+
+    routing {
+        authenticate("mcp-bearer") {
+            route("/mcp") {
+                sse {
+                    val transport = findTransport(call, transports) ?: return@sse
+                    transport.handleRequest(this, call)
+                }
+
+                post {
+                    val transport = getOrCreateTransport(call, transports) ?: return@post
+                    transport.handleRequest(null, call)
+                }
+
+                delete {
+                    val transport = findTransport(call, transports) ?: return@delete
+                    transport.handleRequest(null, call)
+                }
+            }
+        }
+    }
+}
+
+private suspend fun findTransport(
+    call: ApplicationCall,
+    transports: ConcurrentMap<String, StreamableHttpServerTransport>,
+): StreamableHttpServerTransport? {
+    val sessionId = call.request.header(MCP_SESSION_ID_HEADER)
+    if (sessionId.isNullOrEmpty()) {
+        call.respond(HttpStatusCode.BadRequest, "Bad Request: No valid session ID provided")
+        return null
+    }
+    val transport = transports[sessionId]
+    if (transport == null) {
+        call.respond(HttpStatusCode.NotFound, "Session not found")
+        return null
+    }
+    return transport
+}
+
+private suspend fun getOrCreateTransport(
+    call: ApplicationCall,
+    transports: ConcurrentMap<String, StreamableHttpServerTransport>,
+): StreamableHttpServerTransport? {
+    val sessionId = call.request.header(MCP_SESSION_ID_HEADER)
+    if (sessionId != null) {
+        val transport = transports[sessionId]
+        if (transport == null) {
+            call.respond(HttpStatusCode.NotFound, "Session not found")
+        }
+        return transport
+    }
+
+    val configuration = StreamableHttpServerTransport.Configuration(
+        enableJsonResponse = true,
+    )
+    val transport = StreamableHttpServerTransport(configuration)
+
+    transport.setOnSessionInitialized { initializedSessionId ->
+        transports[initializedSessionId] = transport
+    }
+    transport.setOnSessionClosed { closedSessionId ->
+        transports.remove(closedSessionId)
+    }
+
+    val server = createMcpServer()
+    server.onClose {
+        transport.sessionId?.let { transports.remove(it) }
+    }
+    server.createSession(transport)
+
+    return transport
+}
+
+private fun Application.installCors(authEnabled: Boolean = false) {
+    install(CORS) {
+        anyHost() // Don't do this in production if possible. Try to limit it.
+        allowMethod(HttpMethod.Options)
+        allowMethod(HttpMethod.Get)
+        allowMethod(HttpMethod.Post)
+        allowMethod(HttpMethod.Delete)
+        allowNonSimpleContentTypes = true
+        allowHeader("Mcp-Session-Id")
+        allowHeader("Mcp-Protocol-Version")
+        exposeHeader("Mcp-Session-Id")
+        exposeHeader("Mcp-Protocol-Version")
+        if (authEnabled) {
+            allowHeader(HttpHeaders.Authorization)
+        }
+    }
+}
+
+private fun createMcpServer(): Server {
+    val server = Server(
+        Implementation(
+            name = "simple-streamable-http-server",
+            version = "1.0.0",
+        ),
+        ServerOptions(
+            capabilities = ServerCapabilities(
+                prompts = ServerCapabilities.Prompts(listChanged = true),
+                resources = ServerCapabilities.Resources(subscribe = true, listChanged = true),
+                tools = ServerCapabilities.Tools(listChanged = true),
+                logging = ServerCapabilities.Logging,
+            ),
+        ),
+    )
+
+    // Tool: greet
+    server.addTool(
+        name = "greet",
+        description = "A simple greeting tool",
+        inputSchema = ToolSchema(
+            properties = buildJsonObject {
+                putJsonObject("name") {
+                    put("type", "string")
+                    put("description", "Name to greet")
+                }
+            },
+            required = listOf("name"),
+        ),
+    ) { request ->
+        val name = request.arguments?.get("name")?.jsonPrimitive?.content ?: "World"
+        CallToolResult(content = listOf(TextContent("Hello, $name!")))
+    }
+
+    // Tool: multi-greet (demonstrates logging notifications)
+    server.addTool(
+        name = "multi-greet",
+        description = "A tool that sends different greetings with delays between them",
+        inputSchema = ToolSchema(
+            properties = buildJsonObject {
+                putJsonObject("name") {
+                    put("type", "string")
+                    put("description", "Name to greet")
+                }
+            },
+            required = listOf("name"),
+        ),
+        toolAnnotations = ToolAnnotations(readOnlyHint = true, openWorldHint = false),
+    ) { request ->
+        val name = request.arguments?.get("name")?.jsonPrimitive?.content ?: "World"
+
+        sendLoggingMessage(
+            LoggingMessageNotification(
+                LoggingMessageNotificationParams(
+                    level = LoggingLevel.Debug,
+                    data = JsonPrimitive("Starting multi-greet for $name")
+                )
+            )
+        )
+        delay(1000.milliseconds)
+
+        sendLoggingMessage(
+            LoggingMessageNotification(
+                LoggingMessageNotificationParams(
+                    level = LoggingLevel.Info,
+                    data = JsonPrimitive("Sending first greeting to $name")
+                )
+            )
+        )
+        delay(1000.milliseconds)
+
+        sendLoggingMessage(
+            LoggingMessageNotification(
+                LoggingMessageNotificationParams(
+                    level = LoggingLevel.Info,
+                    data = JsonPrimitive("Sending second greeting to $name")
+                )
+            )
+        )
+
+        CallToolResult(content = listOf(TextContent("Good morning, $name!")))
+    }
+
+    // Prompt: greeting-template
+    server.addPrompt(
+        name = "greeting-template",
+        description = "A simple greeting prompt template",
+        arguments = listOf(
+            PromptArgument(
+                name = "name",
+                description = "Name to include in greeting",
+                required = true,
+            ),
+        ),
+    ) { request ->
+        val name = request.arguments?.get("name") ?: "World"
+        GetPromptResult(
+            messages = listOf(
+                PromptMessage(
+                    role = Role.User,
+                    content = TextContent("Please greet $name in a friendly manner."),
+                ),
+            ),
+        )
+    }
+
+    // Resource: greeting-resource
+    server.addResource(
+        uri = "https://example.com/greetings/default",
+        name = "Default Greeting",
+        description = "A simple greeting resource",
+        mimeType = "text/plain",
+    ) { request ->
+        ReadResourceResult(
+            contents = listOf(
+                TextResourceContents("Hello, world!", request.uri, "text/plain"),
+            ),
+        )
+    }
+
+    return server
+}