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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 all 3 protocols in the spec: stdio, sse and streamble-http.
• Deploy anywhere: serverless, edge, mobile, IoT devices
• Cross-platform compatibility out of the box
• Support tool name prefix to prevent tool names collision

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.

Getting Started

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

{
  "plugins": {
    "time": {
      "url": "oci://ghcr.io/hyper-mcp-rs/time-plugin:latest"
    },
    "qr_code": {
      "url": "oci://ghcr.io/hyper-mcp-rs/qrcode-plugin:latest"
    },
    "hash": {
      "url": "oci://ghcr.io/hyper-mcp-rs/hash-plugin:latest"
    },
    "myip": {
      "url": "oci://ghcr.io/hyper-mcp-rs/myip-plugin:latest",
      "runtime_config": {
        "allowed_hosts": ["1.1.1.1"]
      }
    },
    "fetch": {
      "url": "oci://ghcr.io/hyper-mcp-rs/fetch-plugin:latest",
      "runtime_config": {
        "allowed_hosts": ["*"],
  ...