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wassette

Verified Safe

by microsoft

Overview

A secure runtime for AI agents to execute WebAssembly Components as tools via the Model Context Protocol.

Installation

Run Command
wassette run

Environment Variables

  • WASSETTE_CONFIG_FILE
  • WASSETTE_COMPONENT_DIR
  • WASSETTE_SECRETS_DIR
  • PORT
  • BIND_HOST
  • RUST_LOG
  • <COMPONENT_SPECIFIC_API_KEY>

Security Notes

The server is built with a strong focus on security, leveraging WebAssembly's sandboxing (Wasmtime) and a deny-by-default permission model. It enforces fine-grained access control for file system, network, and environment variables via explicit policies. Detailed threat models (confused deputy, supply chain, tool poisoning) and their mitigations are documented. While some cookbook examples mention `eval()` in Python, they also include warnings about its unsafe nature for untrusted input, demonstrating awareness. No obvious hardcoded secrets or malicious patterns were found in the provided snippets.

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Stats

Interest Score99
Security Score9
Cost ClassLow
Avg Tokens75
Stars774
Forks51
Last Update2025-12-01

Tags

MCPWebAssemblyWasm ComponentsAI ToolsSecurity SandboxRuntimeDeveloper ToolsAgentic Workflows