rails-mcp
Allows AI agents to eval and verify rails/ruby code changes
rails-mcp launched on May 18, 2026 with 2 votes, #6,288 of 20,538 launches that month.
What it does
Allows AI assistants to eval and verify rails/ruby code changes at lighting-speed access without the need restart server.
Allows AI assistants to eval and verify rails/ruby code changes at lighting-speed access without the need restart server. - raja-jamwal/rails-mcp
Setting this up? Point your coding agent (Cursor, Claude Code, etc.) at llms.txt and ask it to self-configure rails-mcp in your project. A Ruby gem that provides AI assistants with ruby code execution capabilities within the context of existing running application server. Think of it giving AI assistant lighting-speed access to ruby console without the need to write script, reload or restart. Works with Rails, Sinatra, Hanami, Roda, and any other Rack-based framework. The code is executed in your application's context for debugging and investigation. Used at Apollo.io against a Rails codebase with 20k+ Ruby files. bundle install Usage Mounting the MCP Server Rails ( config/routes.rb ):…from github.com
Does a similar job
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Web-eval-agent – Let the coding agent debug itself2025 · github.com · ▲84Hey HN! We’ve been building an MCP server to help AI-assisted web app developers by using browser agents to test whether changes made by an AI inside an editor actually work. We've been testing it on scenarios like verifying new flows in a UI, or checking that sending a chat request triggers a response. The idea is to let your coding agent both code and evaluate if what it did was correct. Here’s a short demo with Cursor: https://www.youtube.com/watch?v=_AoQK-bwR0w When building apps, we found the hardest part of AI-assisted coding isn’t the coding—it’s tedious point-and-click…
AI Designer MCPApr 2026 · aidesigner.ai · ▲89Give your agent tools to create beautiful, codebase-aware UI

Multi-agent coding assistant with a sandboxed Rust execution engineApr 2026 · github.com · ▲10LangGraph orchestration scaffold (Python) + restricted tool runner (Rust) with batching and run traces. - christianmeurer/Lula


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