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Parselbox
Give every agent an execution layer, not another tool.
2 followers
Give every agent an execution layer, not another tool.
2 followers
Parselbox turns MCP servers, APIs, shells and host functions into native Python objects. Agents discover capabilities on demand, then compose them with code, files, packages and background tasks in one stateful workspace. Move orchestration out of the model’s context window and into code. Run it as an MCP server or embed the Python API. Powered by Deno + Pyodide.
Paintr
I built Parselbox to make programmatic tool calling local, open source and easy to integrate into any agent stack.
Instead of exposing every capability as a separate tool, Parselbox gives the agent one programmable execution layer. MCP servers, APIs, shells and host functions become native objects it can discover on demand and compose through code. Intermediate values stay in variables rather than filling the model’s context.
🧠 Less context bloat and fewer model-to-tool round trips
🔀 Full Python control flow across tools, state and files
📁 Disk-backed workspace, packages, networking and background tasks
⚡ JavaScript/npm interoperability with native WASM/WASI integration
🎨 Generative UI through MCP Apps, from inline HTML to full apps composed across tools
Deno + Pyodide provide a single-process runtime with explicit filesystem and network permissions - no containers or microVMs required. Whether you use Claude Desktop, connect MCP servers or build custom agents, I’d love to know what you would create with it!