# overwing-mcp

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

- **Type:** MCP server
- **Trust:** 60/100 (B), scored on the package rubric
- **Verification:** community-indexed — nobody has claimed this listing
- **Version:** 0.5.0
- **Author:** Overwing
- **License:** MIT
- **npm:** overwing-mcp
- **Source:** https://github.com/frod27/overwing-mcp
- **Compatible clients:** claude-code, cursor, copilot, gemini (basis: transport)

## Trust

60/100 (B), scored on the package rubric
- Publisher verified: no
- Install scripts: nothing suspicious found
- Prompt-injection scan: not run
- Obfuscation scan: not run
- Evidence age: 0 days

## Security scan

- **Status:** clean
- **Scanned:** 2026-09-26T22:45:44.749Z
- **Version scanned:** 0.5.0
- **CVEs:** none found by OSV at scan time

## Tools

13 declared. Statically extracted from the shipped source — a floor on the surface, not a census.
- `evaluate`
- `evaluate_batch` — Score up to 50 texts against one rule set in a single call. Each item counts as one evaluation. Returns a summary plus per-item verdicts; items can fail indepen
- `list_rule_sets` — List the prebuilt and custom rule sets available to this organization.
- `get_rule_set` — Fetch a rule set with its full rule definitions. Use 'content-safety' as a worked example when writing your own.
- `create_rule_set` — Create a custom rule set with 1 to 25 rules. Each rule is a choice (pick one option), score (position on an ordered scale), or noul (yes/no) question with a fai
- `get_evaluation` — Fetch a stored evaluation by id, including the original input and per-rule results.
- `list_evaluations` — List recent evaluations, newest first, with optional verdict and rule set filters. Use next_cursor to page.
- `get_usage` — Daily usage, remaining quota for today, and plan limits.
- `whoami` — Identify the organization and plan behind the configured API key, and whether billing is set up.
- `list_plans` — Public plan catalog: prices, daily limits, and per-minute burst limits. No API key needed.
- `atlas_lookup` — Say what a User-Agent string claims to be and whether the claim can be trusted, from the Overwing Atlas registry of 241 AI crawlers, fetchers and browser agents
- `atlas_agents` — Browse or search Overwing Atlas, the registry of AI crawlers, fetchers and browser agents: name, operator, user-agent tokens, Web Bot Auth key directory, robots
- `atlas_summary` — Public numbers from Overwing Atlas: registry counts by purpose and verification, published browser-agent traffic shares, sector field-scan headlines (e.g. how m

## Install

**Verdict: review** — Installable, but 1 thing to check first: No publisher has proved control of this listing; it is indexed, not vouched for.
**Cautions** (coverage gaps and advisories — never blocking)
- No publisher has proved control of this listing; it is indexed, not vouched for.
**Config** (claude-code):
```json
"{\n  \"mcpServers\": {\n    \"overwing\": {\n      \"command\": \"npx\",\n      \"args\": [\n        \"-y\",\n        \"overwing-mcp\"\n      ],\n      \"env\": {\n        \"OVERWING_API_KEY\": \"<YOUR_OVERWING_API_KEY>\"\n      }\n    }\n  }\n}"
```
**Credentials it will ask for** (names only — Forge never holds a value):
- `OVERWING_API_KEY` — Overwing API Key (required)
Placeholders only. Forge never holds, brokers, or transmits a credential value — replace each <YOUR_NAME> in your own config file. Do not send a value back to Forge; no Forge endpoint accepts one.
- This entry needs 1 credential (1 required). The generated config carries placeholders, so it will fail in the editor rather than at runtime if they are left unset.

## Blast radius

Moderate blast radius — holds an api key; runs on your machine.
- Floor 23, ceiling 23 (tier: moderate)
- This is impact, not likelihood. A high radius is not a defect: a filesystem server is supposed to write files. It is never part of the trust score.

## Machine-readable views of this entry

- Signed JSON: https://forgeregistry.com/api/v1/packages/overwing-mcp
- Install plan: https://forgeregistry.com/api/v1/packages/overwing-mcp/install-plan
- Alternatives: https://forgeregistry.com/api/v1/alternatives/overwing-mcp
- HTML page: https://forgeregistry.com/registry/overwing-mcp
- MCP: POST https://forgeregistry.com/api/mcp → `forge_get_package` / `forge_install_plan`

## About this document

Generated by Forge (https://forgeregistry.com) — a compact rendering of the same record served, signed, at the JSON URL above. Trust and scan facts are the registry's own measurements; anything Forge did not measure is named as unmeasured rather than omitted.