# Attest (npm · attest-mcp)

Scan agent payment endpoints (x402, AP2, L402, MPP, 402) for a trust grade A-F before paying.

- Trust score: 70/100 (medium)
- Change this week: +24
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- remote · `attestagent.org`: 64/100, [markdown](https://verifymcp.io/servers/attestagents-attest-mcp/api-mcp.md), [page](https://verifymcp.io/servers/attestagents-attest-mcp/api-mcp)
- npm · `attest-mcp`: 70/100 (this document), [markdown](https://verifymcp.io/servers/attestagents-attest-mcp/attest-mcp.md), [page](https://verifymcp.io/servers/attestagents-attest-mcp/attest-mcp)

## Channel facts

- Registry: `npm`
- Package: `attest-mcp`
- Version: `1.0.0`
- 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**: 87/100
  - No malware found by supply-chain analysis.
  - Only part of the dependency tree could be resolved (95 of 99), so this covers what we could see, not the whole tree.
  - No install/post-install scripts declared.
  - Only part of the dependency tree could be resolved (95 of 99), 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 56 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 77/100
  - AI-judged instruction clarity (excellent).
  - Tool/resource definitions use about 172 tokens (~86/item across 2 items; 2 tools + 0 resources), lean.
  - 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**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
  - Structured output schemas are declared (100% of tools); any adoption earns full credit.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add attestagents-attest-mcp -- npx -y attest-mcp
```

### Codex

```bash
codex mcp add attestagents-attest-mcp -- npx -y attest-mcp
```

### opencode

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

### OpenClaw

```bash
openclaw mcp add attestagents-attest-mcp --command npx --arg -y --arg attest-mcp
```

### Hermes

```yaml
mcp_servers:
  attestagents-attest-mcp:
    command: "npx"
    args: ["-y", "attest-mcp"]
```

### Other

```json
{
  "mcpServers": {
    "attestagents-attest-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "attest-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 70, +4)

- [functional improvement] Stability: unverified → 0.27

### 2026-08-02 (score 66, +40)

- [security regression] Provenance: unverified → fail
- [security improvement] Known CVEs: unverified → partial
- [security improvement] Install scripts: unverified → pass
- [security improvement] Malware scan: unverified → pass
- [security] Stability: Stability not yet verified: we do not have a sandbox capture of the MCP schema this version of the package serves yet.
- [functional regression] Capabilities: pass → unverified
- [functional improvement] License: unverified → pass
- [functional improvement] Maintenance: unverified → pass
- [functional improvement] Schema quality: unverified → excellent
- [functional improvement] Dependency health: unverified → partial
- [functional] Licence: MIT

### 2026-08-01 (score 26, +21)

- [security] Stability: Stability not yet verified: not enough scan history yet (needs a 30-day window).
- [functional improvement] MCP protocol: unverified → pass
- [functional improvement] Tool coverage: unverified → 100

### 2026-07-31 (score 5, −41)

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

### 2026-07-27 (score 46)

First indexed and scored.

## MCP tools (2)

### `attest_scan` (~100 tokens)

Scan a payment endpoint

Scan an agent payment endpoint (x402 / MPP / AP2 / L402 / HTTP 402) and return a letter grade A–F with a safety verdict. Call this BEFORE authorizing a payment to an unfamiliar endpoint to check for impersonation, blocklisted payout wallets, bait-and-switch pricing, and protocol problems.

Input parameters:

- `url` (string, required): The full URL of the payment endpoint to scan, e.g. https://api.example.com/resource

Output parameters:

- `composite` (number)
- `danger` (boolean)
- `grade` (string)
- `host` (string)
- `priceHuman` (string|null)
- `reportUrl` (string)
- `url` (string)
- `verdict` (string)

### `attest_grade` (~72 tokens)

Look up a host's latest grade

Quickly look up the most recent Attest grade for a host that has already been scanned. Useful for a fast pre-check. If the host has never been scanned, use attest_scan instead.

Input parameters:

- `host` (string, required): The hostname to look up, e.g. api.example.com (a full URL is also accepted).

Output parameters:

- `composite` (number)
- `danger` (boolean)
- `grade` (string)
- `host` (string)
- `scannedAt` (string|null)
- `slug` (string|null)

## Diagnostics

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

## Score history

- 2026-08-03: 70
- 2026-08-02: 66
- 2026-08-01: 26
- 2026-07-31: 5
- 2026-07-30: 46
- 2026-07-28: 46
- 2026-07-27: 46

## Links

- npm package: https://www.npmjs.com/package/attest-mcp
- Socket report: https://socket.dev/npm/package/attest-mcp
- Repository: https://github.com/attestagents/Install-attest-agent
- Website: https://attestagent.org/
- Changelog RSS feed: https://verifymcp.io/servers/attestagents-attest-mcp/attest-mcp/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/attestagents-attest-mcp/attest-mcp/changelog.json
- HTML version of this page: https://verifymcp.io/servers/attestagents-attest-mcp/attest-mcp