# com.mambabuilt/mcp-domain-deliverability-checker (npm · @mambalabsdev/mcp-domain-deliverability-checker)

Audit a domain email deliverability via Apify: SPF, DKIM, DMARC, MX, blacklist, catch-all, age.

- Trust score: 69/100 (medium)
- Change this week: −9
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- npm · `@mambalabsdev/mcp-domain-deliverability-checker`: 69/100 (this document), [markdown](https://verifymcp.io/servers/com-mambabuilt-mcp-domain-deliverability-checker/mambalabsdev-mcp-domain-deliverability-checker.md), [page](https://verifymcp.io/servers/com-mambabuilt-mcp-domain-deliverability-checker/mambalabsdev-mcp-domain-deliverability-checker)

## Channel facts

- Registry: `npm`
- Package: `@mambalabsdev/mcp-domain-deliverability-checker`
- 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 45 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 74/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 205 tokens (~205/item across 1 items; 1 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**: 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.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add com-mambabuilt-mcp-domain-deliverability-checker -- npx -y @mambalabsdev/mcp-domain-deliverability-checker
```

### Codex

```bash
codex mcp add com-mambabuilt-mcp-domain-deliverability-checker -- npx -y @mambalabsdev/mcp-domain-deliverability-checker
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-mambabuilt-mcp-domain-deliverability-checker": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "@mambalabsdev/mcp-domain-deliverability-checker"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add com-mambabuilt-mcp-domain-deliverability-checker --command npx --arg -y --arg @mambalabsdev/mcp-domain-deliverability-checker
```

### Hermes

```yaml
mcp_servers:
  com-mambabuilt-mcp-domain-deliverability-checker:
    command: "npx"
    args: ["-y", "@mambalabsdev/mcp-domain-deliverability-checker"]
```

### Other

```json
{
  "mcpServers": {
    "com-mambabuilt-mcp-domain-deliverability-checker": {
      "command": "npx",
      "args": [
        "-y",
        "@mambalabsdev/mcp-domain-deliverability-checker"
      ]
    }
  }
}
```

## 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 69, +4)

- [functional improvement] Stability: unverified → 0.27

### 2026-08-02 (score 65, +52)

- [security regression] Install scripts: pass → unverified
- [security regression] Provenance: fail → unverified
- [security improvement] GHSA-frvp-7c67-39w9 no longer affects this package
- [security improvement] Known CVEs: unverified → partial
- [security improvement] Malware scan: unverified → pass
- [security] Stability: Stability not yet verified: not enough scan history yet (needs a 30-day window).
- [functional regression] Maintenance: pass → unverified
- [functional regression] License: pass → unverified
- [functional regression] Security disclosure: fail → unverified
- [functional improvement] MCP protocol: unverified → pass
- [functional improvement] Dependency health: unverified → partial
- [functional improvement] Tool coverage: unverified → 100
- [functional] Licence: MIT

### 2026-08-01 (score 13, −22)

- [security regression] Provenance: unverified → fail
- [security improvement] Install scripts: 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] Tool coverage: 100 → unverified
- [functional regression] Capabilities: pass → unverified
- [functional improvement] License: unverified → pass
- [functional improvement] Maintenance: unverified → pass
- [functional] Licence: MIT

### 2026-07-31 (score 35, +25)

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

### 2026-07-30 (score 10, −14)

- [security regression] Malware scan: pass → unverified
- [functional improvement] Dependency health: unverified → partial

### 2026-07-29 (score 24, −54)

- [security regression] Install scripts: pass → unverified
- [security regression] Provenance: fail → unverified
- [security regression] Known CVEs: fail → unverified
- [security improvement] GHSA-frvp-7c67-39w9 no longer affects this package
- [functional regression] Maintenance: pass → unverified
- [functional regression] Dependency health: partial → unverified
- [functional regression] Tool coverage: 100 → unverified
- [functional regression] License: pass → unverified
- [functional] First check of Schema quality: unverified
- [functional] Licence: MIT

### 2026-07-27 (score 78, +36)

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

### 2026-07-26 (score 42)

First indexed and scored.

## MCP tools (1)

### `check_domain_deliverability` (~205 tokens)

Check Domain Deliverability

Audit a domain's email deliverability and DNS health. Returns SPF, DKIM, and DMARC authentication with policy, MX records and mail provider, DNS blacklist status, catch-all detection, domain age, and a 0 to 100 health score as a flat, Clay-ready JSON row. Read-only; requires an APIFY_TOKEN and consumes Apify credits per call.

Input parameters:

- `attempt_catch_all` (boolean): Run the SMTP catch-all probe. Off by default; the Apify platform blocks port 25 so it returns unknown there.
- `batchSize` (number): Domains audited concurrently per wave in batch mode. Default 5, maximum 10.
- `domain` (string): Bare domain to audit, e.g. stripe.com. Provide this or domains.
- `domains` (array): List of bare domains for batch processing. Takes precedence over domain.
- `skipCache` (boolean): Force a fresh audit and ignore the 24 hour result cache.

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/com-mambabuilt-mcp-domain-deliverability-checker/mambalabsdev-mcp-domain-deliverability-checker#diagnostics

## Score history

- 2026-08-03: 69
- 2026-08-02: 65
- 2026-08-01: 13
- 2026-07-31: 35
- 2026-07-30: 10
- 2026-07-29: 24
- 2026-07-27: 78
- 2026-07-26: 42

## Links

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