hyper-mcp

hyper-mcp

A fast, secure MCP server that extends its capabilities through WebAssembly plugins.

What is it?

hyper-mcp makes it easy to add AI capabilities to your applications. It works with Claude Desktop, Cursor IDE, and other MCP-compatible apps. Write plugins in your favorite language, distribute them through container registries, and run them anywhere - from cloud to edge.

Features

• Write plugins in any language that compiles to WebAssembly
• Distribute plugins via standard OCI registries (like Docker Hub)
• Built on Extism for rock-solid plugin support
• Sanboxing with WASM: ability to limit network, filesystem, memory access
• Lightweight enough for resource-constrained environments
• Support stdio transport protocol
• Deploy anywhere: serverless, edge, mobile, IoT devices
• Cross-platform compatibility out of the box
• Support tool name prefix to prevent tool names collision
• Dynamic plugin loading and unloading (configurable)

Security

Built with security-first mindset:

• Sandboxed plugins that can't access your system without permission
• Memory-safe execution with resource limits
• Secure plugin distribution through container registries
• Fine-grained access control for host functions
• OCI plugin images are signed at publish time and verified at load time with sigstore.

Installation

Prerequisites

cosign — required for loading plugins from OCI registries (oci:// URLs).

hyper-mcp verifies the cryptographic signature of every OCI plugin before loading it to ensure the plugin has not been tampered with and comes from a trusted source. This verification is performed by shelling out to the cosign CLI, which must be installed and available on your PATH.

Install cosign by following the official instructions: https://docs.sigstore.dev/cosign/system_config/installation/

Note: If you only use file://, http://, https://, or s3:// plugin URLs, cosign is not needed. You can also bypass signature verification for OCI plugins by setting insecure_skip_signature: true in your config or the HYPER_MCP_INSECURE_SKIP_SIGNATURE=true environment variable, but this is not recommended for production use.

Install from Homebrew

hyper-mcp is published on Homebrew for macOS and Linux in two places:

Homebrew core — no tap setup required:

brew install hyper-mcp

Our own tap (hyper-mcp-rs/tap) — bumped automatically on every GitHub Release, so it picks up new versions immediately:

brew install hyper-mcp-rs/tap/hyper-mcp

Both install the same binary. Prefer the core formula unless you want the absolute latest release the moment it ships.

Pre-built binaries (GitHub Releases)

Download the latest release for your platform from GitHub Releases:

Chose the version that you want and download the architecture-specific binary.

Platform	Architecture	Download
macOS	Apple Silicon (ARM64)	hyper-mcp-aarch64-apple-darwin.tar.gz
Linux	ARM64	hyper-mcp-aarch64-unknown-linux-gnu.tar.gz
Linux	x86_64	hyper-mcp-x86_64-unknown-linux-gnu.tar.gz
Windows	x86_64	hyper-mcp-x86_64-pc-windows-msvc.zip

macOS / Linux:

Donwload the .tar.gz file, extract it, and place hyper-mcp in /usr/local/bin.

Windows:

Download the .zip file, extract it, and place hyper-mcp.exe somewhere on your PATH.

Install from crates.io

If you have Rust installed, you can install hyper-mcp directly from crates.io:

cargo install hyper-mcp

Getting Started

1. Create your config file:
   • Linux: $HOME/.config/hyper-mcp/config.json
   • Windows: {FOLDERID_RoamingAppData}\hyper-mcp\config.json. Eg: C:\Users\Alice\AppData\Roaming\hyper-mcp\config.json
   • macOS: $HOME/Library/Application Support/hyper-mcp/config.json