SineFrame M3

Test MCP servers against real coding-agent workflows

Meet SineFrame M3

SineFrame M3 is a pytest-based framework for checking how an MCP server behaves when used by real AI agents. Developers write a task and assertions about the tool calls or results they expect, then run the test through supported agent harnesses. This can reveal cases where an agent ignores a tool, sends the wrong arguments, or changes behavior after an update. The same tests can be compared across agents and model configurations without rewriting the test intent. Recorded calls provide evidence for debugging descriptions and server behavior. M3 is designed to run locally and in continuous integration, making MCP interaction checks part of the review process before changes reach the main branch.

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Product details

Website: m3.sineframe.com
Status: Launched
Category: Developer tools
Listed: Oct 28, 2026

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AI agents Continuous integration Model Context Protocol Python Testing

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Meet SineFrame M3

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