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/tuananh/time-plugin:latest"
    },
    "qr_code": {
      "url": "oci://ghcr.io/tuananh/qrcode-plugin:latest"
    },
    "hash": {
      "url": "oci://ghcr.io/tuananh/hash-plugin:latest"
    },
    "myip": {
      "url": "oci://ghcr.io/tuananh/myip-plugin:latest",
      "runtime_config": {
        "allowed_hosts": ["1.1.1.1"]
      }
    },
    "fetch": {
      "url": "oci://ghcr.io/tuananh/fetch-plugin:latest",
      "runtime_config": {
        "allowed_hosts": ["*"],
        "memory_limit": "100 MB",
      }
    }
  }
}

📖 For detailed configuration options including authentication setup, runtime configuration, and advanced features, see RUNTIME_CONFIG.md

Supported URL schemes:

• oci:// - for OCI-compliant registries (like Docker Hub, GitHub Container Registry, etc.)
• file:// - for local files
• http:// or https:// - for remote files
• s3:// - for Amazon S3 objects (requires that you have your AWS credentials set up in the environment)

2. Start the server:

$ hyper-mcp

• By default, it will use stdio transport. If you want to use SSE, use flag --transport sse or streamable HTTP with --transport streamable-http.
• If you want to debug, use RUST_LOG=info.
• If you're loading unsigned OCI plugin, you need to set insecure_skip_signature flag or env var HYPER_MCP_INSECURE_SKIP_SIGNATURE to true

Using with Cursor IDE

You can configure hyper-mcp either globally for all projects or specifically for individual projects.

1. For project-scope configuration, create .cursor/mcp.json in your project root:

{
  "mcpServers": {
    "hyper-mcp": {
      "command": "/path/to/hyper-mcp"
    }
  }
}

2. Set up hyper-mcp in Cursor's settings:

3. Start using tools through chat:

Available Plugins

We maintain several example plugins to get you started:

• time: Get current time and do time calculations (Rust)
• qr_code: Generate QR codes (Rust)
• hash: Generate various types of hashes (Rust)
• myip: Get your current IP (Rust)
• fetch: Basic webpage fetching (Rust)
• crypto_price: Get cryptocurrency prices (Go)
• fs: File system operations (Rust)
• github: GitHub plugin (Go)
• eval_py: Evaluate Python code with RustPython (Rust)
• arxiv: Search & download arXiv papers (Rust)
• memory: Let you store & retrieve memory, powered by SQLite (Rust)
• sqlite: Interact with SQLite (Rust)
• crates-io: Get crate general information, check crate latest version (Rust)
• gomodule: Get Go modules info, version (Rust)
• qdrant: keeping & retrieving memories to Qdrant vector search engine (Rust)
• gitlab: GitLab plugin (Rust)
• meme_generator: Meme generator (Rust)
• context7: Lookup library documentation (Rust)
• think: Think tool(Rust)
• maven: Maven plugin (Rust)
• serper: Serper web search plugin (Rust)

Community-built plugins

• hackernews: This plugin connects to the Hacker News API to fetch the current top stories and display them with their titles, scores, authors, and URLs.
• release-monitor-id: This plugin retrieves project ID from release-monitoring.org, which helps track versions of released software.
• yahoo-finance: This plugin connects to the Yahoo Finance API to provide stock prices (OHLCV) based on a company name or ticker symbol.
• rand16: This plugen generates random 16 bytes buffer and provides it in base64uri format - very usable for symmetric cryptography online.

Documentation

• Runtime Configuration Guide - Comprehensive guide to configuration options including:
  • Authentication setup (Basic, Token, and Keyring)
  • Plugin runtime configuration
  • Security considerations and best practices
  • Platform-specific keyring setup for macOS, Linux, and Windows
  • Troubleshooting authentication issues
• Skip Tools Pattern Guide - Comprehensive guide to filtering tools using regex patterns:
  • Pattern syntax and examples
  • Common use cases and best practices
  • Environment-specific filtering strategies
  • Advanced regex techniques
  • Migration and troubleshooting

Creating Plugins

1. Install the XTP CLI:

   curl https://static.dylibso.com/cli/install.sh -s | bash

2. Create a new plugin project:

   xtp plugin init --schema-file plugin-schema.yaml

   Follow the prompts to set up your plugin. This will create the necessary files and structure.

   For example, if you chose Rust as the language, it will create a Cargo.toml, src/lib.rs and a src/pdk.rs file.

3. Implement your plugin logic in the language appropriate files(s) created (e.g. - Cargo.toml and src/lib.rs for Rust) For example, if you chose Rust as the language you will need to update the Cargo.toml and src/lib.rs files.

   Be sure to modify the .gitignore that is created for you to allow committing your Cargo.lock file.

Check out our example plugins for insight.

To publish a plugin:

# example how to build with rust
FROM rust:1.88-slim AS builder

RUN rustup target add wasm32-wasip1 && \
    rustup component add rust-std --target wasm32-wasip1 && \
    cargo install cargo-auditable

WORKDIR /workspace
COPY . .
RUN cargo fetch
RUN cargo auditable build --release --target wasm32-wasip1

FROM scratch
WORKDIR /
COPY --from=builder /workspace/target/wasm32-wasip1/release/plugin.wasm /plugin.wasm

Then build and push:

docker build -t your-registry/plugin-name .
docker push your-registry/plugin-name

License

Apache 2.0

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