nowfound

Life & fun · October 7, 2026

SineFrame M3

Test MCP servers and the agents that call them in pytest

SineFrame M3 launched on October 7, 2026 with 63 votes, #425 of 3,165 launches that month and more than 95% of that year's launches.

Visit m3.sineframe.com ↗SineFrame M3 alternativestop 13% of October 2026

What it does

Test MCP servers and the agents that use them with pytest and real Claude Code, Codex, and OpenCode binaries. Gate pull requests in CI.

M3 is a pytest framework for MCP servers. It tests your server against the agents your users run, like Claude Code and Codex, instead of a bare model API. Hand the setup to your coding agent. Agents answer from memory when your tool doesn’t tell them not to. M3 runs Claude Code, Codex, OpenCode, or Pi against your server, records every MCP tool call, and fails the test when your server was skipped. Fix the description, rerun, ship. Expected get_latest_version(package="tailwindcss"). Observed no MCP tool calls. Run the same tests in Claude Code, Codex, OpenCode, and Pi, and compare the results side by side. Your tests don’t change. Point M3 at its command. It runs the same tests with its own…from m3.sineframe.com

Does a similar job

all alternatives →
  • NitroStack13d ago · nitrostack.ai · ▲240

    Build, test, and deploy MCP servers in one place

  • Exotel's MCP Server2025 · exotel.com · ▲92

    Let your AI agents trigger communication without any code

  • mcpgawk28d ago · mcp.gawk.dev · ▲77

    Catch MCP servers that change after you approved them

  • Product analytics (and evals) for agent sessions on your MCPAug 2026 · armature.tech · ▲42

    Hi HN! We’re Theodore and Louis, founders of Armature (YC P26). We reconstruct the entire session behind the MCP tool calls you receive, including what the user asked their agent to do and what the agent thought. You wrap your MCP in 3 lines of code (our SDK is available in Typescript, Python and Go) and start seeing in your dashboard: - All sessions reconstructed: it’s like reading the real conversation the user had inside Claude or ChatGPT! - A ranking of your MCP most popular use cases, built from sessions clustering - The most frequent issues your users’ agents encounter so you can fix…

  • An Useful MCP Server2025 · github.com · ▲8
  • SpecToMCP2025 · spectomcp.updab.com · ▲19

    Generate MCP servers from OpenAPI specification files

More life & fun this month

the category →

Source: Product Hunt launch ↗

Launched alongside, October 2026

the whole month →