fix(deps): update dependency io.modelcontextprotocol.sdk:mcp to v0.16.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
io.modelcontextprotocol.sdk:mcp	0.12.1 -> 0.16.0

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Release Notes

modelcontextprotocol/java-sdk (io.modelcontextprotocol.sdk:mcp)

v0.16.0

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What's Changed

• feat: enhance error handling with custom error code preservation by @​tzolov in #​653
• Bump json-schema-validator from 1.5.7 to 2.0.0 by @​uarlouski in #​660
• fix: JSONRPCResponse JavaDoc by @​vorburger in #​657
• fix(docs): Remove broken @​see link in McpServer.java Javadoc by @​hbsjz-swl in #​614
• feat(schema): support Object type for progressToken by @​tzolov in #​663

New Contributors

• @​uarlouski made their first contribution in #​660
• @​vorburger made their first contribution in #​657
• @​hbsjz-swl made their first contribution in #​614

Full Changelog: modelcontextprotocol/java-sdk@v0.15.0...v0.16.0

v0.15.0

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What's Changed

• define explicitely that values should always be included in code completions by @​sdelamo in #​601
• fix remove name when using @​JsonTypeInfo(use = JsonTypeInfo.Id.DEDUCTION) by @​sdelamo in #​600
• refactor: change int to Integer for optional numeric fields by @​tzolov in #​604
• fix: allow additional properties by default per JSON Schema spec by @​tzolov in #​617
• Close McpTransportSession on transport close by @​Kehrlann in #​632
• Fix: McpAsyncClient#listTools prevent infinite recursion by @​leehaut in #​631
• chore: standardize client/server implementation names and version by @​tzolov in #​642
• Update dependencies minor versions to fix build on JDK 25 by @​bedrin in #​640
• Support o.s.h.HttpHeaders from both 6.x and 7.x Spring branches by @​bedrin in #​639

New Contributors

• @​leehaut made their first contribution in #​631
• @​bedrin made their first contribution in #​640

Full Changelog: modelcontextprotocol/java-sdk@v0.14.1...v0.15.0

v0.14.1

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Full Changelog: modelcontextprotocol/java-sdk@v0.14.0...v0.14.1

v0.14.0

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What's Changed

• refactor: Improve resource template management and API consistency by @​tzolov @​pascalconfluent #​576
• fix: handle resource not found according to spec by @​sdelamo in #​567
• feat: add optional lastModified field to Annotations record by @​tzolov in #​568
• fix: typo MCP_SESSION_ID, keep consistent style with other identifiers by @​JunJieLiu51520 in #​564
• refactor: improve MCP server resilience and error handling by @​tzolov in #​579
• fix: when using JsonTypeInfo.DEDUCTION don’t add include by @​sdelamo in #​587
• Client: handle server responses with Content-Length: 0 by @​Kehrlann in #​588
• fix: Handle non-compliant notification responses by @​tzolov in #​589
• feat(client): add client tool output schema validation and caching by @​pantanurag555 @​tzolov @​chemicL @​Kehrlann #​302

New Contributors

• @​JunJieLiu51520 made their first contribution in #​564

Full Changelog: modelcontextprotocol/java-sdk@v0.13.1...v0.14.0

v0.13.1

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Full Changelog: modelcontextprotocol/java-sdk@v0.13.0...v0.13.1

v0.13.0

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Release Notes

🚀 Major Features & Enhancements

Protocol Version Support

• Added MCP protocol version 2025-06-18 support for streamable-http and stateless transports (#​558)
  • Set MCP_2025_06_18 as upper supported protocol version
  • Updated LATEST_PROTOCOL_VERSION constant to reflect new upper bound

Module Restructuring

• Extracted mcp-core module (#​557) - ⚠️ BREAKING CHANGE

  • Created new mcp-core module free of Jackson dependencies
  • mcp module now serves as an umbrella module bringing together mcp-json-jackson2 and mcp-core
  • Classes are now in different JARs, which may affect classpath dependencies

• Jackson decoupling (#​543) - Related to (#​557)

  • Abstract away Jackson usage with SPI interfaces
    Creates two modules, mcp-json and mcp-json-jackson. It removes the com.fasterxml.jackson.core:jackson-databind and com.networknt:json-schema-validator dependencies from the mcp (now mcp-core) module. The mcp-core (mcp previously) module now only depends on com.fasterxml.jackson.core:jackson-annotations.
    To use Jackson, you have to add mcp-jackson to your dependencies in addition to mcp-core. I added the dependency mcp-jackson to both mcp-spring-mvc and mcp-spring-webflux to avoid a breaking change in those modules.

Enhanced Tool Output Support

• Support for array-type structured content in tools (#​551) - ⚠️ BREAKING CHANGE
  • Changed CallToolResult.structuredContent type from Map<String,Object> to Object
  • Now supports both objects and arrays as structured content output
  • Updated JsonSchemaValidator to validate any Object type
  • Deprecated CallToolResult constructors in favor of builder pattern
  • Aligns with MCP specification requirements for array-type output schemas

🐛 Bug Fixes

Session Management

• Fixed LifecycleInitializer error recovery (#​549)
  • Initializer can now recover from errors during doInitialize (e.g., HTTP errors)
  • Prevents getting stuck in error state and allows subsequent initialization calls to work
  • Particularly beneficial for OAuth2 token fetch scenarios

Serialization Improvements

• Added JsonInclude annotation to notification records (#​552)
  • Enhanced proper JSON serialization for ResourcesUpdatedNotification and LoggingMessageNotification
  • Excludes absent (null/Optional.empty()) fields from serialized output
  • Ensures consistent serialization behavior across all notification types

Test Infrastructure

• Standardized test parameterization (#​556)
  • Replaced @​ValueSource with @​MethodSource for parameterized tests
  • Added consistent clientsForTesting() methods
  • Removed hardcoded Spring-related labels from framework-agnostic mcp-test module
  • Minor breaking change: moved utility classes from io.modelcontextprotocol.utils to io.modelcontextprotocol.util

⚠️ Breaking Changes Summary

1. Module Structure Changes (#​557 and #​543))

   • Classes previously in mcp are now in mcp-core. mcp module now serves as an umbrella module bringing together mcp-json-jackson2 and mcp-core.
   • May require classpath adjustments

2. Tool Result API Changes (#​551)

   • CallToolResult.structuredContent() now returns Object instead of Map<String,Object>
   • Requires explicit casting when accessing map-like content: ((Map<String,Object>) result.structuredContent()).get("key")
   • Deprecated constructors - use builder pattern instead
   • Custom JsonSchemaValidator implementations need signature updates

3. Package Name Changes (#​556)

   • Utility classes moved from io.modelcontextprotocol.utils to io.modelcontextprotocol.util

📝 Migration Guide

For Tool Result Changes

// Before
result.structuredContent().get("key")

// After  
((Map<String,Object>) result.structuredContent()).get("key")

// Use builder pattern instead of deprecated constructors
CallToolResult.builder()
  .content(content)
  .isError(isError)
  .structuredContent(structuredContent)
  .build()

For Module Dependencies

Ensure your dependencies account for the new module structure:

• mcp-core for Jackson-free core functionality
• mcp continues to work as umbrella module with Jackson support

New Contributors

• @​sdelamo made their first contribution in #​557
• @​graemerocher made their first contribution in #​543
• @​valuesource made their first contribution in #​556

Full Changelog: modelcontextprotocol/java-sdk@v0.12.1...v0.13.0

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