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dependabot[bot] 0835fbd7ed
 chore(deps): bump kotlin from 2.2.21 to 2.3.21 in /samples/simple-streamable-server (#725) 
Bumps `kotlin` from 2.2.21 to 2.3.21.
Updates `org.jetbrains.kotlin.jvm` from 2.2.21 to 2.3.21
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/JetBrains/kotlin/releases">org.jetbrains.kotlin.jvm's
releases</a>.</em></p>
<blockquote>
<h2>Kotlin 2.3.21</h2>
<h2>Changelog</h2>
<h3>Backend. Wasm</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84610"><code>KT-84610</code></a>
[Wasm] Failed to compile klibs in IC mode</li>
</ul>
<h3>Compiler</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84566"><code>KT-84566</code></a>
Prevent launching Default dispatcher threads from IJ SDK in kotlin
compiler</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85358"><code>KT-85358</code></a>
Native: roll back the workaround for KT-84678 once MapLibre has been
properly fixed</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85626"><code>KT-85626</code></a>
<code>@JvmRecord</code> in commonMain breaks
compileCommonMainKotlinMetadata with &quot;Cannot access
'java.lang.Record'&quot;</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85405"><code>KT-85405</code></a>
Postpone/Revert
<code>DontIgnoreUpperBoundViolatedOnImplicitArguments</code></li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84678"><code>KT-84678</code></a>
K/N: Undefined symbol from SPM-added ObjC frameworks when linking iOS
target</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85021"><code>KT-85021</code></a>
False positive SUBCLASS_CANT_CALL_COMPANION_PROTECTED_NON_STATIC error
in multi-module project</li>
</ul>
<h3>JavaScript</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-82395"><code>KT-82395</code></a>
Support top-level declarations from compiler plugins in JS incremental
compilation</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84475"><code>KT-84475</code></a>
K/JS: false-positive exportability warnings in multi-module project</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84633"><code>KT-84633</code></a>
Kotlin/JS: &quot;Serializer for class not found&quot; error when IR
output granularity is <code>whole-program</code></li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85047"><code>KT-85047</code></a>
Kotlin/JS: <code>@JsStatic</code> on suspend fun of class companion
generates incorrect d.ts</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84517"><code>KT-84517</code></a>
K/JS: bad mappings data in outputted Kotlin stdlib source map</li>
</ul>
<h3>Libraries</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-71848"><code>KT-71848</code></a>
Kotlinx.metadata: Add <code>CompilerPluginData</code> into Km API</li>
</ul>
<h3>Native. C and ObjC Import</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85399"><code>KT-85399</code></a>
Kotlin/Native: TypeCastException when casting ObjC Protocol MetaClass
with genericSafeCasts enabled</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85508"><code>KT-85508</code></a>
K/N: TypeCastException when using nw_parameters_create_secure_tcp block
parameter on 2.3.20</li>
</ul>
<h3>Tools. Gradle</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84729"><code>KT-84729</code></a>
Update Gradle plugin-publish version to enable configuration cache badge
on Gradle plugins portal</li>
</ul>
<h3>Tools. Gradle. Compiler plugins</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85257"><code>KT-85257</code></a>
AGP/Compose: MergeMappingFileTask clears R8 artifacts due to
<code>@OutputDirectory</code> annotation on AGP 9.1+</li>
</ul>
<h3>Tools. Scripts</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85105"><code>KT-85105</code></a>
Scripts: JVM backend internal error (IR lowering) when scratch file
contains anonymous object</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85103"><code>KT-85103</code></a>
Exception while generating code when explain destructuring decls</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84842"><code>KT-84842</code></a>
scriptCompilationClasspathFromContext behavior changed from 2.3.10 to
2.3.20</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85029"><code>KT-85029</code></a>
Kotlin Scripting: ScriptDiagnostic reports &quot;at null&quot; instead
of error location</li>
</ul>
<h3>Tools. Statistics (FUS)</h3>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md">org.jetbrains.kotlin.jvm's
changelog</a>.</em></p>
<blockquote>
<h2>2.3.21</h2>
<h3>Backend. Wasm</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84610"><code>KT-84610</code></a>
[Wasm] Failed to compile klibs in IC mode</li>
</ul>
<h3>Compiler</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84566"><code>KT-84566</code></a>
Prevent launching Default dispatcher threads from IJ SDK in kotlin
compiler</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85358"><code>KT-85358</code></a>
Native: roll back the workaround for KT-84678 once MapLibre has been
properly fixed</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85626"><code>KT-85626</code></a>
<code>@JvmRecord</code> in commonMain breaks
compileCommonMainKotlinMetadata with &quot;Cannot access
'java.lang.Record'&quot;</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85405"><code>KT-85405</code></a>
Postpone/Revert
<code>DontIgnoreUpperBoundViolatedOnImplicitArguments</code></li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84678"><code>KT-84678</code></a>
K/N: Undefined symbol from SPM-added ObjC frameworks when linking iOS
target</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85021"><code>KT-85021</code></a>
False positive SUBCLASS_CANT_CALL_COMPANION_PROTECTED_NON_STATIC error
in multi-module project</li>
</ul>
<h3>JavaScript</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-82395"><code>KT-82395</code></a>
Support top-level declarations from compiler plugins in JS incremental
compilation</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84475"><code>KT-84475</code></a>
K/JS: false-positive exportability warnings in multi-module project</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84633"><code>KT-84633</code></a>
Kotlin/JS: &quot;Serializer for class not found&quot; error when IR
output granularity is <code>whole-program</code></li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85047"><code>KT-85047</code></a>
Kotlin/JS: <code>@JsStatic</code> on suspend fun of class companion
generates incorrect d.ts</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84517"><code>KT-84517</code></a>
K/JS: bad mappings data in outputted Kotlin stdlib source map</li>
</ul>
<h3>Libraries</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-71848"><code>KT-71848</code></a>
Kotlinx.metadata: Add <code>CompilerPluginData</code> into Km API</li>
</ul>
<h3>Native. C and ObjC Import</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85399"><code>KT-85399</code></a>
Kotlin/Native: TypeCastException when casting ObjC Protocol MetaClass
with genericSafeCasts enabled</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85508"><code>KT-85508</code></a>
K/N: TypeCastException when using nw_parameters_create_secure_tcp block
parameter on 2.3.20</li>
</ul>
<h3>Tools. Gradle</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84729"><code>KT-84729</code></a>
Update Gradle plugin-publish version to enable configuration cache badge
on Gradle plugins portal</li>
</ul>
<h3>Tools. Gradle. Compiler plugins</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85257"><code>KT-85257</code></a>
AGP/Compose: MergeMappingFileTask clears R8 artifacts due to
<code>@OutputDirectory</code> annotation on AGP 9.1+</li>
</ul>
<h3>Tools. Scripts</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85105"><code>KT-85105</code></a>
Scripts: JVM backend internal error (IR lowering) when scratch file
contains anonymous object</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85103"><code>KT-85103</code></a>
Exception while generating code when explain destructuring decls</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84842"><code>KT-84842</code></a>
scriptCompilationClasspathFromContext behavior changed from 2.3.10 to
2.3.20</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85029"><code>KT-85029</code></a>
Kotlin Scripting: ScriptDiagnostic reports &quot;at null&quot; instead
of error location</li>
</ul>
<h3>Tools. Statistics (FUS)</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85628"><code>KT-85628</code></a>
KGP: composite build FUS metrics fail on access of
'configurationTimeMetrics'</li>
</ul>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="fea1ad8c18"><code>fea1ad8</code></a>
Add ChangeLog for 2.3.21-RC2</li>
<li><a
href="09c341e858"><code>09c341e</code></a>
disable swift export execution tests in order to update macos</li>
<li><a
href="67a08681cd"><code>67a0868</code></a>
Avoid accessing KotlinNativeLink taskProvider when task was not
executed</li>
<li><a
href="f89e5dbc18"><code>f89e5db</code></a>
[K/N] Disable TSAN in runtime tests</li>
<li><a
href="45d6c859c0"><code>45d6c85</code></a>
[K/N] Don't generate generic safe casts for Objective-C types</li>
<li><a
href="9261a6f079"><code>9261a6f</code></a>
[K/N][tests] Add a reproducer for KT-85508</li>
<li><a
href="c9ab9db37a"><code>c9ab9db</code></a>
[K/N][tests] Add a reproducer for KT-85399</li>
<li><a
href="502e84484e"><code>502e844</code></a>
Explain: fix for destructuring declarations</li>
<li><a
href="0c26485d83"><code>0c26485</code></a>
Explain: fix for object literals</li>
<li><a
href="68a9e3f99f"><code>68a9e3f</code></a>
[minor] fix testdata name in explain test</li>
<li>Additional commits viewable in <a
href="https://github.com/JetBrains/kotlin/compare/v2.2.21...v2.3.21">compare
view</a></li>
</ul>
</details>
<br />

Updates `org.jetbrains.kotlin.plugin.serialization` from 2.2.21 to
2.3.21
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/JetBrains/kotlin/releases">org.jetbrains.kotlin.plugin.serialization's
releases</a>.</em></p>
<blockquote>
<h2>Kotlin 2.3.21</h2>
<h2>Changelog</h2>
<h3>Backend. Wasm</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84610"><code>KT-84610</code></a>
[Wasm] Failed to compile klibs in IC mode</li>
</ul>
<h3>Compiler</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84566"><code>KT-84566</code></a>
Prevent launching Default dispatcher threads from IJ SDK in kotlin
compiler</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85358"><code>KT-85358</code></a>
Native: roll back the workaround for KT-84678 once MapLibre has been
properly fixed</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85626"><code>KT-85626</code></a>
<code>@JvmRecord</code> in commonMain breaks
compileCommonMainKotlinMetadata with &quot;Cannot access
'java.lang.Record'&quot;</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85405"><code>KT-85405</code></a>
Postpone/Revert
<code>DontIgnoreUpperBoundViolatedOnImplicitArguments</code></li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84678"><code>KT-84678</code></a>
K/N: Undefined symbol from SPM-added ObjC frameworks when linking iOS
target</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85021"><code>KT-85021</code></a>
False positive SUBCLASS_CANT_CALL_COMPANION_PROTECTED_NON_STATIC error
in multi-module project</li>
</ul>
<h3>JavaScript</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-82395"><code>KT-82395</code></a>
Support top-level declarations from compiler plugins in JS incremental
compilation</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84475"><code>KT-84475</code></a>
K/JS: false-positive exportability warnings in multi-module project</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84633"><code>KT-84633</code></a>
Kotlin/JS: &quot;Serializer for class not found&quot; error when IR
output granularity is <code>whole-program</code></li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85047"><code>KT-85047</code></a>
Kotlin/JS: <code>@JsStatic</code> on suspend fun of class companion
generates incorrect d.ts</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84517"><code>KT-84517</code></a>
K/JS: bad mappings data in outputted Kotlin stdlib source map</li>
</ul>
<h3>Libraries</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-71848"><code>KT-71848</code></a>
Kotlinx.metadata: Add <code>CompilerPluginData</code> into Km API</li>
</ul>
<h3>Native. C and ObjC Import</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85399"><code>KT-85399</code></a>
Kotlin/Native: TypeCastException when casting ObjC Protocol MetaClass
with genericSafeCasts enabled</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85508"><code>KT-85508</code></a>
K/N: TypeCastException when using nw_parameters_create_secure_tcp block
parameter on 2.3.20</li>
</ul>
<h3>Tools. Gradle</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84729"><code>KT-84729</code></a>
Update Gradle plugin-publish version to enable configuration cache badge
on Gradle plugins portal</li>
</ul>
<h3>Tools. Gradle. Compiler plugins</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85257"><code>KT-85257</code></a>
AGP/Compose: MergeMappingFileTask clears R8 artifacts due to
<code>@OutputDirectory</code> annotation on AGP 9.1+</li>
</ul>
<h3>Tools. Scripts</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85105"><code>KT-85105</code></a>
Scripts: JVM backend internal error (IR lowering) when scratch file
contains anonymous object</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85103"><code>KT-85103</code></a>
Exception while generating code when explain destructuring decls</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84842"><code>KT-84842</code></a>
scriptCompilationClasspathFromContext behavior changed from 2.3.10 to
2.3.20</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85029"><code>KT-85029</code></a>
Kotlin Scripting: ScriptDiagnostic reports &quot;at null&quot; instead
of error location</li>
</ul>
<h3>Tools. Statistics (FUS)</h3>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md">org.jetbrains.kotlin.plugin.serialization's
changelog</a>.</em></p>
<blockquote>
<h2>2.3.21</h2>
<h3>Backend. Wasm</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84610"><code>KT-84610</code></a>
[Wasm] Failed to compile klibs in IC mode</li>
</ul>
<h3>Compiler</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84566"><code>KT-84566</code></a>
Prevent launching Default dispatcher threads from IJ SDK in kotlin
compiler</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85358"><code>KT-85358</code></a>
Native: roll back the workaround for KT-84678 once MapLibre has been
properly fixed</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85626"><code>KT-85626</code></a>
<code>@JvmRecord</code> in commonMain breaks
compileCommonMainKotlinMetadata with &quot;Cannot access
'java.lang.Record'&quot;</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85405"><code>KT-85405</code></a>
Postpone/Revert
<code>DontIgnoreUpperBoundViolatedOnImplicitArguments</code></li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84678"><code>KT-84678</code></a>
K/N: Undefined symbol from SPM-added ObjC frameworks when linking iOS
target</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85021"><code>KT-85021</code></a>
False positive SUBCLASS_CANT_CALL_COMPANION_PROTECTED_NON_STATIC error
in multi-module project</li>
</ul>
<h3>JavaScript</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-82395"><code>KT-82395</code></a>
Support top-level declarations from compiler plugins in JS incremental
compilation</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84475"><code>KT-84475</code></a>
K/JS: false-positive exportability warnings in multi-module project</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84633"><code>KT-84633</code></a>
Kotlin/JS: &quot;Serializer for class not found&quot; error when IR
output granularity is <code>whole-program</code></li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85047"><code>KT-85047</code></a>
Kotlin/JS: <code>@JsStatic</code> on suspend fun of class companion
generates incorrect d.ts</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84517"><code>KT-84517</code></a>
K/JS: bad mappings data in outputted Kotlin stdlib source map</li>
</ul>
<h3>Libraries</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-71848"><code>KT-71848</code></a>
Kotlinx.metadata: Add <code>CompilerPluginData</code> into Km API</li>
</ul>
<h3>Native. C and ObjC Import</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85399"><code>KT-85399</code></a>
Kotlin/Native: TypeCastException when casting ObjC Protocol MetaClass
with genericSafeCasts enabled</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85508"><code>KT-85508</code></a>
K/N: TypeCastException when using nw_parameters_create_secure_tcp block
parameter on 2.3.20</li>
</ul>
<h3>Tools. Gradle</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84729"><code>KT-84729</code></a>
Update Gradle plugin-publish version to enable configuration cache badge
on Gradle plugins portal</li>
</ul>
<h3>Tools. Gradle. Compiler plugins</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85257"><code>KT-85257</code></a>
AGP/Compose: MergeMappingFileTask clears R8 artifacts due to
<code>@OutputDirectory</code> annotation on AGP 9.1+</li>
</ul>
<h3>Tools. Scripts</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85105"><code>KT-85105</code></a>
Scripts: JVM backend internal error (IR lowering) when scratch file
contains anonymous object</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85103"><code>KT-85103</code></a>
Exception while generating code when explain destructuring decls</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-84842"><code>KT-84842</code></a>
scriptCompilationClasspathFromContext behavior changed from 2.3.10 to
2.3.20</li>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85029"><code>KT-85029</code></a>
Kotlin Scripting: ScriptDiagnostic reports &quot;at null&quot; instead
of error location</li>
</ul>
<h3>Tools. Statistics (FUS)</h3>
<ul>
<li><a
href="https://youtrack.jetbrains.com/issue/KT-85628"><code>KT-85628</code></a>
KGP: composite build FUS metrics fail on access of
'configurationTimeMetrics'</li>
</ul>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="fea1ad8c18"><code>fea1ad8</code></a>
Add ChangeLog for 2.3.21-RC2</li>
<li><a
href="09c341e858"><code>09c341e</code></a>
disable swift export execution tests in order to update macos</li>
<li><a
href="67a08681cd"><code>67a0868</code></a>
Avoid accessing KotlinNativeLink taskProvider when task was not
executed</li>
<li><a
href="f89e5dbc18"><code>f89e5db</code></a>
[K/N] Disable TSAN in runtime tests</li>
<li><a
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gradle chore(deps): bump kotlin from 2.2.21 to 2.3.21 in /samples/simple-streamable-server (#725) 2026-04-27 15:31:26 +00:00
src samples: update mcp-kotlin to 0.10.0 across sample projects (#645) 2026-03-30 23:47:31 +03:00
build.gradle.kts samples: update mcp-kotlin to 0.10.0 across sample projects (#645) 2026-03-30 23:47:31 +03:00
gradle.properties docs: streamable server sample (#595) 2026-03-10 12:45:21 +01:00
gradlew chore(deps): bump the other-dependencies group across 4 directories with 4 updates (#634) 2026-03-27 00:58:15 +00:00
gradlew.bat chore(deps): bump the other-dependencies group across 4 directories with 4 updates (#634) 2026-03-27 00:58:15 +00:00
README.md docs: streamable server sample (#595) 2026-03-10 12:45:21 +01:00
settings.gradle.kts docs: streamable server sample (#595) 2026-03-10 12:45:21 +01:00

README.md

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

./gradlew run

The server starts on http://localhost:3001/mcp by default.

Connect with the MCP Inspector:

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:

./gradlew run --args="8080"

With authentication

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.