hyper-mcp is an innovative MCP server that uses WebAssembly plugins for high extensibility. It is secure, lightweight, and supports multiple clients. The main limitations are stdio-only transport and the requirement for cosign to load OCI plugins. Overall, it is well-suited for developers who want to customize and expand AI tooling.
hyper-mcp is a fast and secure MCP server that extends its capabilities through WebAssembly plugins. It allows writing plugins in any language that compiles to WebAssembly, and distributing them via standard OCI registries (like Docker Hub). Built on Extism for robust plugin support, it provides sandboxing to limit network, filesystem, and memory access. It supports the stdio transport protocol, is lightweight enough for resource-constrained environments, and can be deployed anywhere: serverless, edge, mobile, IoT. Dynamic plugin loading/unloading and tool name prefixing are supported to prevent collisions.
brew install hyper-mcp or brew install hyper-mcp-rs/tap/hyper-mcp), via cargo (cargo install hyper-mcp), or download a pre-built binary from GitHub Releases. 3. Create a config file (e.g., ~/.config/hyper-mcp/config.json) specifying the WASM plugins to load. 4. Start the server from the command line: hyper-mcp.{
"mcpServers": {
"hyper-mcp": {
"command": "/path/to/hyper-mcp"
}
}
}