4 ms·

Show HN: A MCP server to evaluate Python code in WASM VM using RustPython

41 points by tuananh 1y ago

digdugdirk 1y ago
Is there a list of these "code sandboxes" floating around somewhere? It seems like it's going to be more and more important with LLMs playing more of a factor in development moving forward.
- ushakov 1y ago
  i work on E2B, we are open-source sandbox runtime used by Perplexity, Manus, Hugging Face among others. check it out: https://e2b.dev https://e2b.dev
- benno128 1y ago
  I've got one that uses WebAssembly to run Python, Ruby, C/C++, JS: https://runno.dev/articles/sandbox/ https://runno.dev/articles/sandbox/
  - aitchnyu 1y ago
    Is there a better way to sandbox Python other than using a webassembly build?
    - benno128 1y ago
      Yeah for sure: run it inside a virtual machine, or do some sort of docker magic. You kind of need to pretend you are a whole computer for a programming language to be happy. There's built in assumptions they're running on a "real" computer. They assume they've got full access to network and disk. Installing packages often requires compiling C extensions, or running native binaries. All that stuff means the best way to sandbox is to virtualise a whole computer. It's fun to do it with WebAssembly though, you get a lot of guarantees and it's quite light weight.
  - apitman 1y ago
    You should repost that article on HN. WASI in the browser is awesome and I would love to see some discussion about it.
- someguy101010 1y ago
  https://github.com/r33drichards/mcp-js https://github.com/r33drichards/mcp-js mcp for running javascript locally and safely using v8
- sudb 1y ago
  I know of https://modal.com/ https://modal.com/, which I believe is used by Codegen and Cognition. Anecdotally-speaking, I hear that many companies in the LLM agent space roll their own sandbox solutions - I've heard of both Firecracker- and Kubernetes-based implementations.
apignotti 1y ago
Does anyone know if there is work on the idea of letting MCP-like "servers" run on the client-side? I.e. in the same browser tab as ChatGPT or Claude? This specific example would make much more sense if it could run sandboxed client-side.
- TZubiri 1y ago
  Sounds cool. We already have browser use though! You can also roll your own with selenium and c vision or selectors.
- nilslice 1y ago
  all of the servers deployed to mcp.run[0] are Wasm modules, and can run client side. they run in our cloud too, but you could use mcpx to pull them locally instead. you can also get the raw wasm via our API and run them anywhere you can run Extism[1], the open source wasm runtime & framework that underpins it all. (Including this hyper-mcp project!) [0]: https://mcp.run https://mcp.run [1]: https://github.com/extism/extism https://github.com/extism/extism
TZubiri 1y ago
Or just use Chatgpt.
ubermonkey 1y ago
I cannot be the only GenX nerd who reads that and thinks "Master Control Program" from Tron.

41 points by tuananh 1y ago

Is there a list of these "code sandboxes" floating around somewhere? It seems like it's going to be more and more important with LLMs playing more of a factor in development moving forward.

ushakov 1y ago
i work on E2B, we are open-source sandbox runtime used by Perplexity, Manus, Hugging Face among others. check it out: https://e2b.dev https://e2b.dev
benno128 1y ago
I've got one that uses WebAssembly to run Python, Ruby, C/C++, JS: https://runno.dev/articles/sandbox/ https://runno.dev/articles/sandbox/
- aitchnyu 1y ago
  Is there a better way to sandbox Python other than using a webassembly build?
  - benno128 1y ago
    Yeah for sure: run it inside a virtual machine, or do some sort of docker magic. You kind of need to pretend you are a whole computer for a programming language to be happy. There's built in assumptions they're running on a "real" computer. They assume they've got full access to network and disk. Installing packages often requires compiling C extensions, or running native binaries. All that stuff means the best way to sandbox is to virtualise a whole computer. It's fun to do it with WebAssembly though, you get a lot of guarantees and it's quite light weight.
- apitman 1y ago
  You should repost that article on HN. WASI in the browser is awesome and I would love to see some discussion about it.
someguy101010 1y ago
https://github.com/r33drichards/mcp-js https://github.com/r33drichards/mcp-js mcp for running javascript locally and safely using v8
sudb 1y ago
I know of https://modal.com/ https://modal.com/, which I believe is used by Codegen and Cognition. Anecdotally-speaking, I hear that many companies in the LLM agent space roll their own sandbox solutions - I've heard of both Firecracker- and Kubernetes-based implementations.

apignotti 1y ago

Does anyone know if there is work on the idea of letting MCP-like "servers" run on the client-side? I.e. in the same browser tab as ChatGPT or Claude? This specific example would make much more sense if it could run sandboxed client-side.

TZubiri 1y ago
Sounds cool. We already have browser use though! You can also roll your own with selenium and c vision or selectors.
nilslice 1y ago
all of the servers deployed to mcp.run[0] are Wasm modules, and can run client side. they run in our cloud too, but you could use mcpx to pull them locally instead. you can also get the raw wasm via our API and run them anywhere you can run Extism[1], the open source wasm runtime & framework that underpins it all. (Including this hyper-mcp project!) [0]: https://mcp.run https://mcp.run [1]: https://github.com/extism/extism https://github.com/extism/extism

TZubiri 1y ago

Or just use Chatgpt.

ubermonkey 1y ago

I cannot be the only GenX nerd who reads that and thinks "Master Control Program" from Tron.