cap-x vs ros-mcp-server
The two are close in size: 769 stars for cap-x, 1.4k for ros-mcp-server. Over the days we have tracked them cap-x moved +17.2% and ros-mcp-server +5.7%, so cap-x is growing faster right now.
ros-mcp-server leads on context depth. cap-x does not take any axis by a clear margin.
Stars and commit dates come from our own daily tracking. The six axes are read off each project's documentation by our review pipeline, so they describe what a project says about itself, not what we measured in its code.
Where they stand today
Provides an end-to-end, robotics-focused framework that benchmarks and improves Code-as-Policy agents with interactive robot gym environments, multi-tier benchmarks, a training-free agent, and RL fine-tuning tools bundled together.
- Stars
- 769
- Tracked growth
- +17.2%
- Maturity
- ●●●●●
- Last commit
- 99d ago
- Language
- Python
- License
- MIT
- Cost to run
- Your API key or local GPU
Bridges ROS and the MCP standard to let LLMs fully observe and control robots without modifying robot source code.
- Stars
- 1.4k
- Tracked growth
- +5.7%
- Maturity
- ●●●●●
- Last commit
- 22h ago
- Language
- Python
- License
- Apache-2.0
- Cost to run
- Depends on external model providers; uses your model client / API key.
Six axes, head to head
Each axis runs 0 to 5. The label under a score is what that project's own docs claim, not a category average.
| Axis | cap-x | ros-mcp-server |
|---|---|---|
Context depth How much of your codebase it sees before it answers: the open diff, the diff plus related files, or the whole repository. | ●●●●● Diff only | ●●●●● Full robot context |
Noise control How it keeps output volume down — severity thresholds, deduplication, incremental runs over new commits only. | ●●●●● None mentioned | ●●●●● Minimal guidance |
Customization How far it bends to your team: custom rules, prompts, style guides, per-path config. | ●●●●● Config file | ●●●●● Minimal config |
Privacy Whether your code stays on your own infrastructure: fully local, self-hostable, or cloud API only. | ●●●●● Self-hostable | ●●●●● Self-hostable |
Model freedom Whether you can point it at any provider, or it is wired to one. | ●●●●● Bring-your-own-key | ●●●●● Any provider |
Setup ease What it takes to get a first useful run out of it. | ●●●●● Config + API key | ●●●●● ROS setup required |
Which one to pick
Pick cap-x if…
Robotics-focused — pick CaP-X when you need a comprehensive, open-source benchmark and toolkit for evaluating and improving code-generating agents on robot manipulation tasks with simulation environments and RL support.
Pick ros-mcp-server if…
No robot code changes — pick this to add LLM control and observation to an existing ROS system with minimal integration effort and local deployment.
- Context depth: Full robot context (5/5 against 1/5)
What people want from each one
capgym/cap-x
robotmcp/ros-mcp-server
Questions people ask
Is cap-x better than ros-mcp-server?
ros-mcp-server leads on context depth. cap-x does not take any axis by a clear margin. cap-x is worth picking when robotics-focused — pick CaP-X when you need a comprehensive, open-source benchmark and toolkit for evaluating and improving code-generating agents on robot manipulation tasks with simulation environments and RL support.
Which of cap-x and ros-mcp-server keeps my code private?
cap-x: Self-hostable (4/5). ros-mcp-server: Self-hostable (4/5).
What does each one cost to run?
cap-x: Your API key or local GPU. ros-mcp-server: Depends on external model providers; uses your model client / API key..
Full profiles: capgym/cap-x and robotmcp/ros-mcp-server. Everything else in Robotics & embodied.