Act on this, mostly signal

MCP Test Kitchen misbehaves on purpose to test MCP clients

What to do

Point your MCP client or gateway at it to test 2025-11-25 and 2026-07-28 revisions.

Why

Self-hostable open-source server with six failure scenarios for engineers testing clients.

Read the source at news.ycombinator.com Discussion

What the research found

MCP Test Kitchen is an open-source, self-hostable MCP server that misbehaves on purpose so engineers can test their MCP clients and gateways against 2025-11-25 and 2026-07-28 protocol revisions across six failure scenarios.

Claims and how well the evidence supports them

MCP Test Kitchen supports MCP protocol revisions 2025-11-25 and 2026-07-28 98%
MCP Test Kitchen offers 6 scenarios including HTTP transport errors, JSON-RPC errors, isError results, elicitation, and MRTR 97%
MCP Test Kitchen is open source and can be self-hosted 98%
A hosted version requires login with Google or GitHub 99%

Evidence

news.ycombinator.com https://news.ycombinator.com/item?id=50105780
github.com https://github.com/cakewalk-security/cakewalk-mcp-test-kitch...

Actionability rated high.