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SineFrame M3

SineFrame M3

Test MCP servers and the agents that call them in pytest

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Launched October 8, 2026
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About SineFrame M3

SineFrame M3 is an innovative open-source testing tool designed for developers working with MCP servers and agents. Unlike traditional unit tests that only verify code passes, M3 ensures that the agents calling the MCP servers actually make the expected calls during real interactions. It leverages powerful AI models like Claude Code, Codex, OpenCode, or Pi to run real server tests and then asserts on the actual calls made, all within a straightforward pytest environment. The tool provides a transparent view of every trace and tool call through its UI, allowing developers to diagnose and verify interactions with precision. Additionally, M3 offers an integrated CI testing pipeline that can gate pull requests and store test runs on app.m3.sineframe.com, streamlining the development workflow. Its open-source nature under the Apache-2.0 license makes it accessible and customizable for teams focused on AI, developer tools, and open-source projects.

Screenshots

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Pros

  • ✓Ensures real call verification rather than just code pass rates
  • ✓Open-source with customizable and transparent testing environment
  • ✓Integrates seamlessly with CI pipelines and PR gating
  • ✓Supports multiple AI models for flexible testing scenarios
  • ✓Provides detailed call trace visualizations

Cons

  • ✗Requires familiarity with pytest and AI model integrations
  • ✗Limited information on pricing or enterprise features
  • ✗Might be complex for teams new to AI-powered testing

Use Cases

1Testing MCP server interactions in AI-driven applications
2Verifying agent call accuracy in complex distributed systems
3Automating integration tests for AI-powered chatbots or assistants
4Ensuring compliance and correct call sequences in AI workflows
5Streamlining CI/CD pipelines with automated agent call validation
6Open-source projects requiring transparent and reproducible tests

Pricing

Pricing not verified

Quick Info

Category💻 Developer Tools
Upvotes0
Comments1
Launched10/8/2026

Topics

Open SourceDeveloper ToolsArtificial IntelligenceGitHub

Makers

Utkarsh Pandey

Utkarsh Pandey

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