HyperCAUTION
📦️ A fast, secure MCP server that extends its capabilities through WebAssembly plugins.
Overview
From the repository's own README, as read at the audited commit. Badges and raw HTML are left out.
[](https://crates.io/crates/hyper-mcp) [](#license) [](https://github.com/hyper-mcp-rs/hyper-mcp/issues)
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
stdiotransport 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 distributio
2c1d49372e79OBSERVED · 2026-09-27Trust audit
CAUTIONgrade C · trust 74/100 Install with care. The audit found things worth knowing before you trust its output.
| Layer | What it checks | Result |
|---|---|---|
| L0 | Provenance & inventory | PASS |
| L1 | Static analysis of the code | WARN |
| L2 | Instruction surface (what it tells the agent) | PASS |
| L3 | Class-specific surface | PASS |
| L4 | Behavioural (sandbox) | SKIPPED |
What the source does
- Filesystem
- declared (2 observation(s))
- Network
- declared (5 observation(s))
- Shell
- none-observed
- Dependencies
- pinned
- Secrets in source
- found
Findings (20)
let ip_url = Url::parse("https://192.168.1.100:443").unwrap();let url = Url::parse(&format!("http://127.0.0.1:{}/test.wasm", addr.port())).unwrap();let url = Url::parse(&format!("http://127.0.0.1:{}/public.wasm", addr.port())).unwrap();let base_url = Url::parse(&format!("http://127.0.0.1:{}", addr.port())).unwrap();let url = Url::parse(&format!("http://127.0.0.1:{}/cached.wasm", addr.port())).unwrap();token: "ghp_1234567890abcdef"
token: "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiYWRtaW4iOnRydWV9.TJVA95OrM7E2cBab30RMHrHDcEfxjoYZgeFONFh7HgQ".to_string(),
token: "ghp_1234567890abcdef"
.hadolint.yaml
.pre-commit-config.yaml
.terraform.lock.hcl
Rather than allowing plugins unrestricted access to the system keyring, `allowed_secrets` implements a principle of least privilege by specifying exactly which keyring entries a plugin may access. Thi
1. Open Keychain Access (Applications → Utilities → Keychain Access)
1. Open "Credential Manager" from Control Panel → User Accounts → Credential Manager
The plugin can only access these specific database credentials, not other secrets in the keyring.
curl https://static.dylibso.com/cli/install.sh -s | bash
assets/cursor-mcp-1.png
assets/cursor-mcp.png
assets/logo.png
Gates applied: no_behavioural_pass.
2c1d49372e79full audit observations/trust-audit/mcp-server/joseph-wortmann__hyper-1.json · Report an issue / request a re-scanAudit history
Every audit this server has had. A grade with a past is a grade somebody is still checking.
| Date | Source | Verdict | Grade | Score | Change |
|---|---|---|---|---|---|
| 2026-09-27 | 2c1d49372e79 | CAUTION | C | 74 | first audit |
Questions
What is the Hyper MCP server?
📦️ A fast, secure MCP server that extends its capabilities through WebAssembly plugins.
Is Hyper safe to connect to an agent?
With care. The audit graded it C (74/100) and found 20 things worth knowing before you trust this server, listed below with the exact line each was found on.
What credentials does Hyper need?
No credential environment variables were found in its source, so it appears to need none.
How does Hyper run?
It speaks stdio, so it runs as a local process your client starts.
How current is this page?
The grade is for one exact copy of the source (2c1d49372e79), read on 2026-09-27. The repository is watched and re-audited when it changes.