SineFrame M3
Test MCP servers and the agents that call them in pytest
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This is 1 of 60 launches in mcp server developer tools — see how it stacks up on momentum and crowding →
93 other launches read as similar to this one →
Details
- External ID
- 1272866
- Source
- PH
- Company
- —
- Product
- SineFrame M3
- Website domain
- producthunt.com
- Launched
- Oct. 8, 2026
- Cohort
- —
- Upvotes
- 61
- Upvotes percentile
- 0.96
- Tags
- Open Source, Developer Tools, Artificial Intelligence, GitHub
Description
Your MCP unit tests pass, but did the agent call the tool? M3 runs your server through real Claude Code, Codex, OpenCode or Pi and asserts on the calls they actually made, in plain pytest. Direct tests need no API key. m3 ui shows every trace and tool call; m3 ci test --upload gates PRs and keeps runs on app.m3.sineframe.com. Open source, Apache-2.0.
Enrichment
- Niche
- mcp server developer tools
- Vertical
- Horizontal
- Function
- Dev tools
- Audience
- Developer
- AI stance
- AI-native
- Project type
- Commercial product
- Normalized one-liner
- pytest testing framework for mcp servers and agents
- Manually corrected
- False
Could you build this?
Yes It is a developer testing framework that wraps pytest and the Model Context Protocol (MCP) JSON-RPC spec to assert tool execution traces.
Competitors
Other products that read as similar to this one — 93 launches clear the similarity bar, closest 8 shown.
Attention rank: #7 of 94 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 328 days after the earliest competitor.
- MCPSpec · hn · 2026-02-25 · 7 upvotes · similarity 0.47
- MCPJam · ph · 2026-09-17 · 141 upvotes · similarity 0.45
- MCPShip · ph · 2026-09-12 · 3 upvotes · similarity 0.43
- QApilot MCP for Android · ph · 2026-09-12 · 211 upvotes · similarity 0.43
- mcp-recorder · hn · 2026-03-06 · 6 upvotes · similarity 0.42
- MCPify · ph · 2026-10-03 · 1 upvotes · similarity 0.41
- Tool for Testing MCP Servers · hn · 2026-01-07 · 5 upvotes · similarity 0.41
- MCP Playground · hn · 2026-03-01 · 7 upvotes · similarity 0.40
Other launches for this product
- No other launches for this product.