MCP Java SDK Release Notes

Features

URI Template Support (PR #208): Added URI template functionality for MCP resources, allowing dynamic resource URIs with variables in the format {variableName}. This enables:
- More flexible resource definitions
- Automatic extraction of variable values from request URIs
- Validation of template arguments in completions
- Matching of request URIs against templates
Completion Feature (PR #173): Added support for the completion feature according to the MCP specification, enabling auto-completion suggestions in client applications.
JSON Schema Improvements (PR #146): Added support for $defs and definitions properties in JsonSchema record to handle JSON Schema references properly, enabling more complex schema structures with reusable components.
Server Instructions Access (PR #148): Enabled the MCP Client to read the Server instructions, exposing optional instruction data defined in the MCP specification.

Context Propagation (PR #154): Fixed context propagation to transport, ensuring reactor context is properly propagated up to the transport layer.
Code Cleanup (PR #228): Removed temporary delegate implementation from McpAsyncServer that was left after deprecation.
Error Messages (PR #171): Fixed "method not found" error message for server, improving error reporting.
Documentation (PR #149): Fixed javadoc errors for improved API documentation.

We'd like to thank the following contributors for their work on this release: