Wassette

Name: Wassette
Availability: InStock
Author: microsoft

Supports UI

by microsoft

Security-oriented runtime for executing WebAssembly components via MCP with browser-grade isolation.

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Works in:VS Code CopilotCursorGemini CLI

Exposes:ToolsResources

View on GitHub Docs

What it does

Wassette provides a secure, sandboxed runtime that allows AI agents to execute WebAssembly (Wasm) Components. By leveraging the Wasmtime security sandbox, it ensures that tools run with high isolation, preventing unauthorized system access while expanding an agent's capabilities.

Tools

Component Loader: Dynamically loads Wasm components from OCI registries (e.g., oci://ghcr.io/...) into the agent's runtime.
Wasm Execution: Executes the logic contained within loaded components to perform specific tasks, such as time retrieval or data processing.

Installation

Quick Start (Linux/macOS)

curl -fsSL https://raw.githubusercontent.com/microsoft/wassette/main/install.sh | bash

Claude Desktop Config

Add the following to your claude_desktop_config.json:

{
  "mcpServers": {
    "wassette": {
      "command": "wassette",
      "args": []
    }
  }
}

Supported hosts

Confirmed support for Claude Desktop, GitHub Copilot, Cursor, Claude Code, and Gemini CLI.

Quick install

curl -fsSL https://raw.githubusercontent.com/microsoft/wassette/main/install.sh | bash

Information

Pricing: free
Published: 4/15/2026
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