asmhatreandClaude Sonnet 5.5
0006167c24
An incident-desk MCP server with a fixed resource, two resource templates, a prompt, a tool that borrows the client's model (sampling) and a tool that asks the operator to approve a restart (elicitation). Driven by a plain SDK client in JUnit and by raw curl, so the JSON-RPC for both server-to-client requests is committed. Also captured: a client that declared neither capability (a gated tool degrades, an ungated one returns an isError result), a slow client hitting the server request timeout, and protocol=STATELESS silently dropping every tool that takes McpSyncRequestContext (one WARN line, an empty tools/list). Negotiated protocol version is 2025-11-25; the 2026-07-28 spec is not implemented by SDK 2.1.0. No docs/ folder. Co-Authored-By: Claude Sonnet 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_017ic4b5jAFLJrmUXmbo5EuV
mcp-advanced
The half of MCP beyond tools: resources, prompts, sampling and elicitation, on Spring Boot 4.1.2, Spring AI 2.0.2 and MCP Java SDK 2.1.0 (Java 25). The server is an "incident desk"; the tests drive it with a plain MCP SDK client so the transcripts show what is on the wire.
| Piece | File |
|---|---|
| Resources + a template | src/main/java/com/ankurm/mcpadvanced/IncidentResources.java |
| Prompt | .../IncidentPrompts.java |
| Tools that call back into the client (sampling, elicitation) | .../IncidentTools.java, .../RestartApproval.java |
| Test client + transcript writer | src/test/java/com/ankurm/mcpadvanced/ |
Run
./scripts/run-all.sh # tests (they write output/01..09) + curl wire demo (output/10, 11)
mvn spring-boot:run # the server on :8089/mcp
output/ holds the captured results the article quotes. Request and session ids in the two wire transcripts change on every run; the one timing line in 07 is indicative only.
There is deliberately no docs/ folder: the explanation lives in the article, in collapsible sections next to the code it describes.