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wassette

From public sources

Wassette: A security-oriented runtime that runs WebAssembly Components via MCP

MCP serverCategory: MCP Servers · Git & developer tools · SDKs & frameworksOpen sourcedata checked Oct 15, 2026
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Overview

  • capabilities
  • mcp
  • mcp-server
  • oci
  • oci-artifacts
  • permissions
  • wasm
  • wasm-component
  • wasmtime

Installation

Commands are shown, never run by the marketplace. Check them against the official documentation.

Compatibility

Unknown means no evidence was found — not that the product is incompatible.
PlatformStatusArchitectureEvidenceConfidence
Claude (web & desktop)Unknown———
Claude CodeUnknown———
CursorUnknown———
VS CodeUnknown———
WindsurfUnknown———
ChatGPTUnknown———
WindowsCompatiblex86_64official build in release v0.8.1: wassette_0.8.1_windows_amd64.zip0.70
Compatiblearm64official build in release v0.8.1: wassette_0.8.1_windows_arm64.zip0.70
macOSCompatiblex86_64official build in release v0.8.1: wassette_0.8.1_darwin_amd64.tar.gz0.70
Compatiblearm64official build in release v0.8.1: wassette_0.8.1_darwin_arm64.tar.gz0.70
LinuxCompatiblex86_64official build in release v0.8.1: wassette_0.8.1_linux_amd64.tar.gz0.70
Compatiblearm64official build in release v0.8.1: wassette_0.8.1_linux_arm64.tar.gz0.70

Releases

checked Oct 29, 2026
v0.8.1LatestOct 19, 2026Official source ↗

Files in 0.8.1

The marketplace does not host these files: downloads go to the official source. Files have not been scanned by us.
FilePlatformSizeSHA-256Download from the official source
wassette_0.8.1_darwin_amd64.tar.gzmacos · x86_64 · tarball16.8 MBca3d5c15f487…Official source ↗
wassette_0.8.1_darwin_arm64.tar.gzmacos · arm64 · tarball15 MB45917de0a6be…Official source ↗
wassette_0.8.1_linux_amd64.tar.gzlinux · x86_64 · tarball17.3 MB2a421a73c700…Official source ↗
wassette_0.8.1_linux_arm64.tar.gzlinux · arm64 · tarball15.7 MB4081cfcff1de…Official source ↗
wassette_0.8.1_windows_amd64.zipwindows · x86_64 · zip16.2 MBc8061c97a519…Official source ↗
wassette_0.8.1_windows_arm64.zipwindows · arm64 · zip14.4 MBf8b3680a760c…Official source ↗

Release history

Quality profile

algorithm quality-v1.0 · assessed Oct 15, 2026
Quality Score85
Risk Score0
Confidence 1.00
Quality Score and Risk Score are different measures. A high score does not guarantee safety.

Score components

Maintenance · 2020
last activity 1 days ago
Documentation · 1515
README 4126 chars, description present
Ready to use · 156
install instructions: no; releases: yes
Metadata · 1010
4/4 of description, homepage, license, topics
Releases · 1010
10 release(s), latest 16 days ago
Category confidence · 107
classifier confidence 0.65
Adoption · 107
966 stars (log-dampened, 10k = max)
License clarity · 55
SPDX MIT
Community · 55
issues enabled, 75 forks

License

MIT
Known licensefrom the repository host

This is the catalog policy status, not legal advice.

Sources

github.com/microsoft/wassettePrimary★ 966 starslast activity Oct 14, 2026Primary repository · Confidence 1.00

Reviews

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README

From microsoft/wassette · license MIT · fetched Oct 29, 2026

Quick Start | FAQ | Documentation | Releases | Contributing | Discord

[!WARNING] Early Development: This repository is not production ready yet. It is in early development and may change significantly.

Why Wassette?

  • Convenience: Wassette makes it easy to extend AI agents with new tools, all without ever having to leave the chat window.
  • Reusability: Wasm Components are generic and reusable; there is nothing MCP-specific about them.
  • Security: Wassette is built on the Wasmtime security sandbox, providing browser-grade isolation of tools.

Architecture

[An architecture diagram showing the relationship between Wassette, MCP Clients, and Wasm Components]

Installation

Quick start: For Linux/macOS, use our one-liner install script:

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

For complete installation instructions for all platforms (including Windows, Homebrew, Nix, Docker, and more), see our Installation Guide.

Using Wassette

With Wassette installed, the next step is to register it with your agent of choice. See our Quick Start guide (3 simple steps), or check the MCP Clients guide for detailed setup instructions for GitHub Copilot, Copilot CLI, Claude Code, and Codex CLI.

Once configured, you can start loading WebAssembly components. To teach your agent to tell the time, ask it to load a time component:

Please load the time component from oci://ghcr.io/microsoft/time-server-js:latest

Now that the time component is loaded, we can ask your agent to tell you the current time:

What is the current time?

The agent will respond with the current time, which is fetched from the time component running in a secure WebAssembly sandbox:

The current time July 31, 2025 at 10:30 AM UTC

Congratulations! You've just run your first Wasm Component and taught your agent how to tell time!

Demo

https://github.com/user-attachments/assets/8e5a371c-ac72-406d-859c-03833ee83963

Discord

You can join us via the #wassette channel on the Microsoft Open Source Discord:

[Microsoft Open Source Discord]

Contributing

Please see CONTRIBUTING.md for more information on how to contribute to this project.

License

This project is licensed under the MIT License.

Trademarks

This project may contain trademarks or logos for projects, products, or services. Authorized use of Microsoft trademarks or logos is subject to and must follow Microsoft’s Trademark & Brand Guidelines. Use of Microsoft trademarks or logos in modified versions of this project must not cause confusion or imply Microsoft sponsorship. Any use of third-party trademarks or logos are subject to those third-party’s policies.

Contributors

Thanks to all contributors who are helping shape Wassette into something great.

Open the repository ↗