2 findingsStatic scanned
Adds Storybook component and story documentation tools to an MCP server you run yourself.
9.4M installs/moMIT
Overwing MCP
blackcherrymochi · MCP server
Overwing is an API that checks what your model said before it ships, and this package exposes it to your agent as MCP tools. Each rule returns an answer with a probability and a confidence, and the overall result is pass, fail or review with a recommended action of block, redact, review or allow. Prebuilt rule sets cover toxicity, personal data, confidential leaks, self-harm and sexual content. Other tools check how reachable a site is for agents and test an unsigned Solana transaction against a spending policy.
Written by ooruby from the README of overwing-mcp 0.13.0.
Not claimed by its maker. Is this yours? Prove it and answer the findings
Why it's useful
You can check what your model wrote against explicit rules before it goes out, and see which rule triggered each verdict.
What you could do with it
- Score a draft reply for toxicity, personal data or confidential leaks before your agent sends it.
- Write your own rule in plain language as a yes or no question, then check a batch of up to 50 texts against it.
- Check an unsigned Solana transaction against a spending limit and get an allow or refuse answer with reasons.
Written from its documentation: what it says it can do, not what our checks found.
Maintenance
Not measuredNo release date is on record for this package yet. The nightly publisher check records one as it reaches each npm package, about once every ten nights.
Release activity only: it says nothing about quality or safety, and a finished small package can be fine without releases. How it is measured
What this does not cover
- Everything. Treat it as you would software from anywhere else.
Receipt history: every signed receipt for every version of this listing, and what changed between them.
In its maker's words
Overwing MCP server: guardrails for LLM output. Score any text for safety, quality and compliance and get pass / fail / review verdicts with calibrated confidence, from any MCP-capable agent. Plus Overwing Atlas: identify any User-Agent string against a r
Compare with
Compare all 4How far this has been checked
Static scanned
- What it establishes
- Its published package, or for a hosted server its source repository at a recorded commit, was read file by file, without running it, by every check in our current scan.
- What it does not
- How it behaves when it runs, or anything the scan does not read yet: several rubric checks, the repository's history, and compiled code in folders named dist or build. For a hosted server, that the endpoint runs the code that was read. The ooruby Index sets out exactly what was read.
- Exactly what was read
- Version 0.13.0, the file with digest sha512-qpjk9RwBOptqk3vGmgwxdW1xTyNBNGDg2N1M3cLCoyr3r13dWf0wlyYl47K1Cca9E5NC5EiVW7Hq929jI4jCtg==, as the registry publishes it. A published version cannot be replaced, so this names the same bytes for anyone who checks.
- Authentication
- Auth declared. Its hosted endpoint, as the official MCP registry lists it, asks for a key or a token before it will talk.
Adding it
Paste this into your client's MCP configuration.
{
"mcpServers": {
"overwing-mcp": {
"command": "npx",
"args": [
"-y",
"overwing-mcp@0.13.0"
]
}
}
}Or run it directly.
npx -y overwing-mcp@0.13.0Pinned to 0.13.0, which is the version the findings above were found in. Drop the version to take whatever is newest, and the report on this page stops describing what you installed.
Where this came from
- Registry
- npm
- Package
- overwing-mcp
- Version read
- 0.13.0
- Resolved
- 2026-10-10
No build provenance published. The repository above is the one the publisher declared, and nothing links it to the package you would install. That is not a mark against this listing, since most packages are published this way, but it is a check nobody can run.
The badge, if this is your listing
It renders the current rung (static scanned) and links back here, where what that does and does not establish is one click away. It updates itself as the evidence deepens.
[](https://ooruby.com/market/overwing-mcp)About this listing
- Kind
- MCP server
- Category
- Developer tools
- Pricing
- Free
- Sandbox
- No
- Hosted
- No
- Updated
- 2026-10-09
Similar MCP servers
All MCP serversVerification records what our published tests found on a specific version at a specific date. It is not a warranty, and it does not certify that software is free of defects.