# io.github.chefcohen/corroborate-mcp (npm · corroborate-mcp)

Honest claim corroboration for AI agents: syndication-aware independent-source counting.

- Trust score: 65/100 (medium)
- Change this week: +20
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- npm · `corroborate-mcp`: 65/100 (this document), [markdown](https://verifymcp.io/servers/chefcohen-corroborate-mcp/corroborate-mcp.md), [page](https://verifymcp.io/servers/chefcohen-corroborate-mcp/corroborate-mcp)

## Channel facts

- Registry: `npm`
- Package: `corroborate-mcp`
- Version: `0.1.2`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-03.

- **Supply Chain Security**: 78/100
  - No malware found by supply-chain analysis.
  - CVE check failed: a known medium-severity CVE affects fast-xml-parser 4.5.7, a direct dependency. A fixed version is available.
  - No install/post-install scripts declared.
  - Only part of the dependency tree could be resolved (97 of 101), so this covers what we could see, not the whole tree.
- **Provenance & Transparency**: 45/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 0 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 71/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 305 tokens (~152/item across 2 items; 2 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 27/100
  - Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 89/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 67% of tool parameters carry a description.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add chefcohen-corroborate-mcp -- npx -y corroborate-mcp
```

### Codex

```bash
codex mcp add chefcohen-corroborate-mcp -- npx -y corroborate-mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "chefcohen-corroborate-mcp": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "corroborate-mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add chefcohen-corroborate-mcp --command npx --arg -y --arg corroborate-mcp
```

### Hermes

```yaml
mcp_servers:
  chefcohen-corroborate-mcp:
    command: "npx"
    args: ["-y", "corroborate-mcp"]
```

### Other

```json
{
  "mcpServers": {
    "chefcohen-corroborate-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "corroborate-mcp"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-03 (score 65, +1)

No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-08-02 (score 64, +44)

- [security regression] CVE-2026-41650 affects this package: medium
- [security regression] Provenance: unverified → fail
- [security regression] Known CVEs: unverified → fail
- [security improvement] Install scripts: unverified → pass
- [security improvement] Malware scan: unverified → pass
- [functional improvement] License: unverified → pass
- [functional improvement] Dependency health: unverified → partial
- [functional improvement] Maintenance: unverified → pass
- [functional improvement] MCP protocol: unverified → pass
- [functional improvement] Stability: unverified → 0.23
- [functional improvement] Schema quality: unverified → good
- [functional] Licence: MIT

### 2026-08-01 (score 20, +15)

- [functional improvement] Tool coverage: unverified → 100

### 2026-07-31 (score 5, −22)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-30 (score 27, −18)

- [security regression] Malware scan: pass → unverified

### 2026-07-27 (score 45)

First indexed and scored.

## MCP tools (2)

### `corroborate_claim` (~205 tokens)

Corroborate a claim

Given a factual/news claim, returns how INDEPENDENTLY it is being reported. Use before relying on a current-event claim. Output: verdict (CONFIRMED = 2+ independent origins | SINGLE_SOURCE | UNCORROBORATED), count of independent story origins (wire/syndication echoes collapse to one), per-source evidence (outlet, domain, url, date), confidence 0-1, coverage flag, honest caveats. Measures REPORTING corroboration, not truth — no stance detection, so a distorted claim about a real event may still show coverage; verify specifics against the returned sources. Keyless, read-only, deterministic; if all sources are unreachable it errors rather than returning a false negative.

Input parameters:

- `claim` (string, required): The claim to check, as a plain declarative sentence
- `max_sources` (integer): Max evidence sources returned (default 8)
- `window_days` (integer): Lookback window in days (default 7)

### `find_sources` (~100 tokens)

Find sources

Multi-engine news/source search (Google News, GDELT, Hacker News) for a query: a deduped list of {outlet, domain, url, date}. Use when you want raw coverage to judge yourself, not a scored verdict — the cheaper primitive under corroborate_claim. Keyless, read-only.

Input parameters:

- `max_sources` (integer)
- `query` (string, required): Search query or claim
- `window_days` (integer)

## Diagnostics

Captured diagnostic sections: Provenance, Vulnerabilities, Dependencies. The full working is on the page: https://verifymcp.io/servers/chefcohen-corroborate-mcp/corroborate-mcp#diagnostics

## Score history

- 2026-08-03: 65
- 2026-08-02: 64
- 2026-08-01: 20
- 2026-07-31: 5
- 2026-07-30: 27
- 2026-07-28: 45
- 2026-07-27: 45

## Links

- npm package: https://www.npmjs.com/package/corroborate-mcp
- Socket report: https://socket.dev/npm/package/corroborate-mcp
- Repository: https://github.com/chefcohen/corroborate-mcp
- Changelog RSS feed: https://verifymcp.io/servers/chefcohen-corroborate-mcp/corroborate-mcp/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/chefcohen-corroborate-mcp/corroborate-mcp/changelog.json
- HTML version of this page: https://verifymcp.io/servers/chefcohen-corroborate-mcp/corroborate-mcp