# Crixin Voice (npm · crixin)

Give your AI a real phone: place calls, send SMS, fetch recordings and transcripts. Local or hosted.

- Trust score: 75/100 (medium)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-20

## Components

- remote · `crixin-platform.vercel.app`: 36/100, [markdown](https://verifymcp.io/servers/com-crixin-voice/api-mcp.md), [page](https://verifymcp.io/servers/com-crixin-voice/api-mcp)
- npm · `crixin`: 75/100 (this document), [markdown](https://verifymcp.io/servers/com-crixin-voice/crixin.md), [page](https://verifymcp.io/servers/com-crixin-voice/crixin)

## Channel facts

- Registry: `npm`
- Package: `crixin`
- Version: `0.7.2`
- 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 2026-09-20.

- **Supply Chain Security**: 98/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - No install/post-install scripts declared.
  - 36 of 109 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 48/100
  - 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 15 days ago).
  - Publishes a security disclosure policy (SECURITY.md).
- **Schema Quality & AI Usability**: 67/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 839 tokens (~139/item across 6 items; 6 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 53/100
  - Stability observed for 16 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 87/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 61% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - All 1 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation.
  - An AI judge read all 6 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the Crixin Voice MCP server?

Crixin Voice runs locally as an npm package, launched with npx -y crixin. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add com-crixin-voice -- npx -y crixin
```

### Cursor

```json
{
  "mcpServers": {
    "com-crixin-voice": {
      "command": "npx",
      "args": [
        "-y",
        "crixin"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "com-crixin-voice": {
      "command": "npx",
      "args": [
        "-y",
        "crixin"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add com-crixin-voice -- npx -y crixin
```

### opencode

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

### OpenClaw

```bash
openclaw mcp add com-crixin-voice --command npx --arg -y --arg crixin
```

### Hermes

```yaml
mcp_servers:
  com-crixin-voice:
    command: "npx"
    args: ["-y", "crixin"]
```

### Netclaw

```json
{
  "McpServers": {
    "com-crixin-voice": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "crixin"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add com-crixin-voice -t stdio -c npx -a -y crixin
```

### Other

```json
{
  "mcpServers": {
    "com-crixin-voice": {
      "command": "npx",
      "args": [
        "-y",
        "crixin"
      ]
    }
  }
}
```

## 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.

### 2026-09-18 (score 75, +1)

No change was recorded against any check on this day. Stability & Change Management went from 43 to 47. That category is still filling its 30-day observation window: 13 days of observed history at the previous scan, 14 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-16 (score 74, +1)

No change was recorded against any check on this day. Stability & Change Management went from 37 to 40. That category is still filling its 30-day observation window: 11 days of observed history at the previous scan, 12 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-14 (score 73, +1)

No change was recorded against any check on this day. Stability & Change Management went from 30 to 33. That category is still filling its 30-day observation window: 9 days of observed history at the previous scan, 10 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-12 (score 72, +4)

- [functional improvement] Stability: unverified → 0.27

### 2026-09-04 (score 68)

First indexed and scored.

## MCP tools (6)

### `make_call` (~486 tokens)

Place a phone call

Place an outbound voice call through Twilio. Pass a `to` number (E.164 like +201234567890) and either a `prompt` (the assistant will speak it; recipient response is recorded by default) or raw `twiml` for full control. Returns the Call SID and initial status.

Input parameters:

- `closing_message` (string): Optional final line spoken before hangup.
- `consented` (boolean): Attest that the recipient has given prior express consent (and, where required by law, prior express WRITTEN consent) to receive this AI voice call. Required for destinations in strict-consent jurisd…
- `language` (string): Locale tag matching the voice, e.g. 'en-US', 'ar-EG'.
- `machine_detection` (string): Whether Twilio should detect voicemail. 'DetectMessageEnd' waits for the beep before TwiML runs.
- `max_recording_seconds` (integer)
- `prompt` (string): What the assistant should say when the recipient picks up. If `record` is not false, a recording prompt is appended.
- `record` (boolean): Whether to record the recipient's reply after the prompt. Ignored when `twiml` or `url` is supplied.
- `status_callback` (string): Optional public URL Twilio POSTs to as the call progresses (initiated → ringing → answered → completed).
- `to` (string, required): E.164 destination number, e.g. +201234567890
- `twiml` (string): Inline TwiML XML to use instead of the prompt/record flow. If set, `prompt` is ignored.
- `url` (string): Public URL Twilio fetches for TwiML. Use this only if you need stateful flows. Leave empty to inline TwiML.
- `voice` (string): Twilio TTS voice. e.g. 'Polly.Joanna-Neural' (en-US), 'Polly.Hala-Neural' (ar-EG), 'Polly.Zeina' (ar-MSA), 'Google.en-US-Wavenet-D'. Default Polly.Joanna-Neural.

### `get_call` (~33 tokens)

Get call status

Look up a single call by SID. Returns status, duration, price, timestamps.

Input parameters:

- `call_sid` (string, required)

### `list_calls` (~76 tokens)

List recent calls

List recent calls. Filter by `to`, `from`, `status`, or `start_time_after` (ISO timestamp).

Input parameters:

- `from` (string)
- `page_size` (integer)
- `start_time_after` (string): ISO 8601 timestamp.
- `status` (string)
- `to` (string)

### `list_recordings` (~39 tokens)

List call recordings

List recordings attached to a call. Returns SIDs, durations, and direct media URLs (auth-protected).

Input parameters:

- `call_sid` (string, required)

### `transcribe_call` (~113 tokens)

Transcribe a recording

Transcribe a Twilio recording via Deepgram. Supports Arabic (ar), English (en), Spanish (es), and 30+ other languages. Requires DEEPGRAM_API_KEY in env.

Input parameters:

- `diarize` (boolean): Detect distinct speakers.
- `language` (string): ISO 639-1 code, e.g. 'ar', 'en'. Pass 'auto' to detect.
- `model` (string): Deepgram model name. Default 'nova-2'.
- `recording_sid` (string, required)

### `send_sms` (~92 tokens)

Send an SMS

Send an SMS or MMS via Twilio. Pass `media_url` for MMS. Use `messaging_service_sid` for sticky-sender behavior.

Input parameters:

- `body` (string, required): Message text. SMS auto-segments past 160 chars.
- `media_url` (string)
- `messaging_service_sid` (string)
- `status_callback` (string)
- `to` (string, required): E.164 destination

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/com-crixin-voice/crixin#diagnostics

## Score history

- 2026-09-20: 75
- 2026-09-19: 75
- 2026-09-18: 75
- 2026-09-17: 74
- 2026-09-16: 74
- 2026-09-15: 73
- 2026-09-14: 73
- 2026-09-13: 72
- 2026-09-12: 72
- 2026-09-11: 68
- 2026-09-10: 68
- 2026-09-09: 68
- 2026-09-08: 68
- 2026-09-07: 68
- 2026-09-06: 68
- 2026-09-05: 68
- 2026-09-04: 68

## Common questions

### What is the Crixin Voice MCP server?

Crixin Voice is an MCP server listed in the public MCP registry as com.crixin/voice. Give your AI a real phone: place calls, send SMS, fetch recordings and transcripts. Local or hosted. This page covers its npm package (crixin).

### Is the Crixin Voice MCP server safe to use?

Crixin Voice scores 75 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 20 September 2026. It declares no install or post-install scripts. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the Crixin Voice MCP server expose?

Crixin Voice exposes 6 tools: make_call, get_call, list_calls, list_recordings, transcribe_call, send_sms. Their descriptions and schemas cost roughly 839 tokens of context every time the server is loaded.

### Is the Crixin Voice MCP server still maintained?

Crixin Voice is still listed as active in the MCP registry. We last reached this channel on 20 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

### What licence is the Crixin Voice MCP server under?

Crixin Voice declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.

## Links

- npm package: https://www.npmjs.com/package/crixin
- Socket report: https://socket.dev/npm/package/crixin
- Repository: https://github.com/THELAZIZAGROUP/crixin
- Website: https://crixin.com/
- Changelog RSS feed: https://verifymcp.io/servers/com-crixin-voice/crixin.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-crixin-voice/crixin.json
- HTML version of this page: https://verifymcp.io/servers/com-crixin-voice/crixin