Java MCP SDK: Invalid JSON-RPC Version

StatusFailed

Transportstdio

TestedOct 2, 2026

Duration687 ms

Observations

Recorded behavior from this compatibility test.

Supporting records captured for this run.

error

Source: https://github.com/anilloutombam/mcp-failure-lab/blob/main/docs/compatibility/java-sdk-2.0.1.md

View raw evidence

The client accepted a response declaring JSON-RPC 1.0 in all three runs.

Reviewed conclusions and upstream reporting state.

protocol-behavior

Issue opened by MCP Failure Lab