# io.github.krystiangw/zen (npm · @krystiangw/zen-mcp)

Unofficial MCP server for the ZEN.com Payment Gateway: payment links, transactions, refunds.

- Trust score: 82/100 (high trust)
- Change this week: 0
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-01

## Components

- npm · `@krystiangw/zen-mcp`: 82/100 (this document), [markdown](https://verifymcp.io/servers/krystiangw-zen/krystiangw-zen-mcp.md), [page](https://verifymcp.io/servers/krystiangw-zen/krystiangw-zen-mcp)

## Channel facts

- Registry: `npm`
- Package: `@krystiangw/zen-mcp`
- Version: `0.1.1`
- 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 2026-10-01.

- **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.
  - 31 of 93 dependencies flagged as unhealthy.
- **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 44 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 79/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 729 tokens (~45/item across 16 items; 14 tools + 2 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 100/100
  - No destabilizing schema changes in the last 30 days.
- **Tool Coverage**: 67/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 0% 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 15 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 io.github.krystiangw/zen MCP server?

io.github.krystiangw/zen runs locally as an npm package, launched with npx -y @krystiangw/zen-mcp. 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 krystiangw-zen -- npx -y @krystiangw/zen-mcp
```

### Cursor

```json
{
  "mcpServers": {
    "krystiangw-zen": {
      "command": "npx",
      "args": [
        "-y",
        "@krystiangw/zen-mcp"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "krystiangw-zen": {
      "command": "npx",
      "args": [
        "-y",
        "@krystiangw/zen-mcp"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add krystiangw-zen -- npx -y @krystiangw/zen-mcp
```

### opencode

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

### OpenClaw

```bash
openclaw mcp add krystiangw-zen --command npx --arg -y --arg @krystiangw/zen-mcp
```

### Hermes

```yaml
mcp_servers:
  krystiangw-zen:
    command: "npx"
    args: ["-y", "@krystiangw/zen-mcp"]
```

### Netclaw

```json
{
  "McpServers": {
    "krystiangw-zen": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "@krystiangw/zen-mcp"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add krystiangw-zen -t stdio -c npx -a -y @krystiangw/zen-mcp
```

### Other

```json
{
  "mcpServers": {
    "krystiangw-zen": {
      "command": "npx",
      "args": [
        "-y",
        "@krystiangw/zen-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.

### 2026-10-01 (score 82, 0)

- [security] Stability: 0.97 → pass

### 2026-09-30 (score 82, +1)

No change was recorded against any check on this day. Stability & Change Management went from 93 to 97. That category is still filling its 30-day observation window: 28 days of observed history at the previous scan, 29 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-28 (score 81, +1)

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

### 2026-09-26 (score 80, +1)

No change was recorded against any check on this day. Stability & Change Management went from 80 to 83. That category is still filling its 30-day observation window: 24 days of observed history at the previous scan, 25 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-25 (score 79, −3)

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

### 2026-09-24 (score 82, 0)

- [security] Stability: 0.97 → pass

### 2026-09-23 (score 82, +1)

No change was recorded against any check on this day. Stability & Change Management went from 93 to 97. That category is still filling its 30-day observation window: 28 days of observed history at the previous scan, 29 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-21 (score 81, +1)

No change was recorded against any check on this day. Stability & Change Management went from 87 to 90. That category is still filling its 30-day observation window: 26 days of observed history at the previous scan, 27 at this one. The score rises as the window fills, whether or not the server changes.

## MCP tools (14)

### `list_payment_methods` (~23 tokens)

List payment methods

Read-only: list payment methods available to the configured ZEN terminal.

### `get_transaction` (~42 tokens)

Get transaction

Read-only: retrieve a transaction by exactly one ZEN ID or merchant transaction ID.

Input parameters:

- `merchantTransactionId` (string)
- `zenId` (string)

### `list_payment_links` (~40 tokens)

List payment links

Read-only: list hosted ZEN payment links.

Input parameters:

- `limit` (integer)
- `page` (integer)
- `status` (string)

### `get_payment_link` (~29 tokens)

Get payment link

Read-only: retrieve a hosted ZEN payment link by ID.

Input parameters:

- `id` (string, required)

### `get_payout` (~31 tokens)

Get payout

Read-only: retrieve a ZEN payout by its ZEN ID.

Input parameters:

- `zenId` (string, required)

### `download_report` (~53 tokens)

Download report

Read-only: request a transaction or settlement report download from ZEN.

Input parameters:

- `endDate` (string)
- `format` (string)
- `reportType` (string)
- `startDate` (string)

### `list_supported_currencies` (~23 tokens)

List supported currencies

Read-only: list currencies confirmed in the public ZEN documentation.

### `create_payment_link` (~84 tokens)

Create payment link

Write operation: create a hosted ZEN checkout link and QR code for a customer to pay.

Input parameters:

- `amount` (required)
- `currency` (string, required)
- `customIpnUrl` (string)
- `description` (string)
- `expiresAt` (string)
- `idempotencyKey` (string)
- `merchantTransactionId` (string, required)

### `refund_transaction` (~62 tokens)

Refund transaction

Destructive write: return all or part of a payment to the customer. Confirm the transaction and amount before use.

Input parameters:

- `amount`
- `idempotencyKey` (string)
- `transactionId` (string)
- `zenId` (string)

### `capture_transaction` (~49 tokens)

Capture transaction

Destructive write: capture an authorized transaction, causing funds to be collected. Confirm before use.

Input parameters:

- `amount`
- `id` (string, required)
- `idempotencyKey` (string)

### `cancel_transaction` (~47 tokens)

Cancel transaction

Destructive write: cancel a ZEN transaction. This may prevent or reverse payment processing; confirm before use.

Input parameters:

- `id` (string, required)
- `idempotencyKey` (string)

### `create_payout` (~106 tokens)

Create payout

Highest-risk destructive write: send money outward through ZEN. Verify recipient, channel, currency, and amount before use.

Input parameters:

- `amount` (required)
- `currency` (string, required)
- `customerEmail` (string)
- `customerFirstName` (string)
- `customerLastName` (string)
- `customerPhone` (string)
- `idempotencyKey` (string)
- `merchantTransactionId` (string, required)
- `paymentChannel` (string, required)

### `create_customer` (~68 tokens)

Create customer

Write operation: create a customer record in ZEN for future payment flows; this stores personal data.

Input parameters:

- `email` (string, required)
- `firstName` (string)
- `idempotencyKey` (string)
- `lastName` (string)
- `phone` (string)

### `verify_webhook_signature` (~40 tokens)

Verify webhook signature

Read-only: verify a ZEN IPN webhook signature using the configured IPN secret.

Input parameters:

- `payload` (required)
- `signature` (string, required)

## Diagnostics

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

## Score history

- 2026-10-01: 82
- 2026-09-30: 82
- 2026-09-29: 81
- 2026-09-28: 81
- 2026-09-27: 80
- 2026-09-26: 80
- 2026-09-25: 79
- 2026-09-24: 82
- 2026-09-23: 82
- 2026-09-22: 81
- 2026-09-21: 81
- 2026-09-20: 80
- 2026-09-19: 80
- 2026-09-18: 79
- 2026-09-17: 79
- 2026-09-16: 82
- 2026-09-15: 82
- 2026-09-14: 82
- 2026-09-13: 81
- 2026-09-12: 81
- 2026-09-11: 80
- 2026-09-10: 80
- 2026-09-09: 79
- 2026-09-08: 79
- 2026-09-07: 78
- 2026-09-06: 78
- 2026-09-05: 77
- 2026-09-04: 77
- 2026-09-03: 76
- 2026-09-02: 76

## Common questions

### What is the io.github.krystiangw/zen MCP server?

io.github.krystiangw/zen is an MCP server listed in the public MCP registry as io.github.krystiangw/zen. Unofficial MCP server for the ZEN.com Payment Gateway: payment links, transactions, refunds. This page covers its npm package (@krystiangw/zen-mcp).

### Is the io.github.krystiangw/zen MCP server safe to use?

io.github.krystiangw/zen scores 82 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 1 October 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 io.github.krystiangw/zen MCP server expose?

io.github.krystiangw/zen exposes 14 tools: list_payment_methods, get_transaction, list_payment_links, get_payment_link, get_payout, and 9 more. Their descriptions and schemas cost roughly 697 tokens of context every time the server is loaded.

### Is the io.github.krystiangw/zen MCP server still maintained?

io.github.krystiangw/zen is still listed as active in the MCP registry. We last reached this channel on 1 October 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 io.github.krystiangw/zen MCP server under?

io.github.krystiangw/zen 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/@krystiangw/zen-mcp
- Socket report: https://socket.dev/npm/package/@krystiangw/zen-mcp
- Repository: https://github.com/krystiangw/zen-mcp
- Website: https://zenmcp.github.io/
- Changelog RSS feed: https://verifymcp.io/servers/krystiangw-zen/krystiangw-zen-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/krystiangw-zen/krystiangw-zen-mcp.json
- HTML version of this page: https://verifymcp.io/servers/krystiangw-zen/krystiangw-zen-mcp