Conformance server for the stateless 2026-07-28 MCP revision, built on io.modelcontextprotocol.modern.server.McpServer and HttpServletMcpTransport in an embedded Tomcat. The legacy (2025-11-25) server lives in server-servlet.

See VALIDATION_RESULTS.md for the latest results.

./mvnw clean install -DskipTests
./mvnw exec:java -pl conformance-tests/server-servlet-modern

The server listens on http://localhost:8081/mcp (override the port with -Dport=<port>).

npx @modelcontextprotocol/conformance@0.2.0-alpha.12 server \
  --url http://localhost:8081/mcp --requirements 2026-07-28

Besides the standard test_* tools, resources and prompts, the server exposes the fixtures the 2026-07-28 scenarios probe for:

• SEP-2575 diagnostics: test_missing_capability, test_streaming_elicitation, test_logging_tool, test_trigger_tool_change, test_trigger_prompt_change
• SEP-2322 MRTR: test_input_required_result_* tools and the test_input_required_result_prompt prompt
• SEP-1613 / SEP-2106: json_schema_2020_12_tool

SEP-2243 custom headers (x-mcp-header / Mcp-Param-{Name}) are not supported yet; see Known Limitations.