# io.github.x-tkn/x-tkn-mcp (npm · @x-tkn/mcp)

Lets an AI agent hand a secret to a person as a one-time link, with no way to read it back.

- Trust score: 59/100 (low)
- Change this week: +31
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-19

## Components

- npm · `@x-tkn/mcp`: 59/100 (this document), [markdown](https://verifymcp.io/servers/x-tkn-x-tkn-mcp/x-tkn-mcp.md), [page](https://verifymcp.io/servers/x-tkn-x-tkn-mcp/x-tkn-mcp)

## Channel facts

- Registry: `npm`
- Package: `@x-tkn/mcp`
- Version: `1.0.1`
- 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 2026-10-19.

- **Supply Chain Security**: 81/100
  - No malware found by supply-chain analysis.
  - CVE check failed: a known high-severity CVE affects @modelcontextprotocol/sdk 1.30.1, a direct dependency. A fixed version is available.
  - No install/post-install scripts declared.
  - 31 of 92 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 19/100
  - Repository check failed: no source repository is declared.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (ISC).
  - Actively maintained (last published 7 days ago).
  - Security-disclosure policy not yet verified: we couldn't inspect the source repository.
- **Schema Quality & AI Usability**: 73/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 515 tokens (~171/item across 3 items; 3 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 0/100
  - Stability not yet verified: not enough scan history yet (needs a 30-day window).
- **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.
- **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 4 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.

**Unverified: 1 category.** A category scored 0 because we could not verify it: a data source with nothing on this package, evidence we could not reach, or a check we could not run. We only credit what we can confirm.

## Install

### How do I install the io.github.x-tkn/x-tkn-mcp server?

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

### Cursor

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

### VS Code

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

### Codex

```bash
codex mcp add x-tkn-x-tkn-mcp -- npx -y @x-tkn/mcp
```

### opencode

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

### OpenClaw

```bash
openclaw mcp add x-tkn-x-tkn-mcp --command npx --arg -y --arg @x-tkn/mcp
```

### Hermes

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

### Netclaw

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

### Vellum

```bash
assistant mcp add x-tkn-x-tkn-mcp -t stdio -c npx -a -y @x-tkn/mcp
```

### Other

```json
{
  "mcpServers": {
    "x-tkn-x-tkn-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@x-tkn/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.

### 2026-10-14 (score 59, +31)

- [security improvement] Injection markers: unverified → pass
- [security] First check of Judged manipulation: pass
- [security] Stability: Stability not yet verified: not enough scan history yet (needs a 30-day window).
- [functional improvement] Tool coverage: unverified → 100
- [functional improvement] MCP protocol: unverified → pass
- [functional] First check of Schema quality: fail
- [functional] First check of Schema quality: excellent
- [functional] First check of Schema quality: fail
- [functional] First check of Destructive annotations: 100
- [functional] First check of Tool coverage: 100
- [functional] First check of Tool coverage: 100

### 2026-10-12 (score 28)

First indexed and scored.

## MCP tools (3)

### `create_secret` (~297 tokens)

Create a one-time secret link

Turn a secret (a password, API key, recovery code or private note) into a link a person opens once. The secret is encrypted on this machine before anything is sent, and X-TKN never holds the key. The link stops working once opened, or at its expiry. You cannot read the secret back afterwards: this server has no read tool. Returns the link and a code for check_status and revoke_secret. Up to 64 KB on the free Developer plan, 256 KB on Team and Enterprise.

Input parameters:

- `expiresIn` (object): How long the link works if nobody opens it. Defaults to the plan's: 7 days on Developer, 30 on Team.
- `note` (string): A note for your own records, shown in the X-TKN console and never to the recipient. Stored unencrypted, so never put the secret in it.
- `passphrase` (string): Make the recipient type this before the secret opens. Send it by a different channel than the link. X-TKN stores a hash of it, which gates the link and plays no part in the encryption. Team plan and…
- `recipientEmail` (string): Make the recipient enter a 6-digit code emailed to this address before the secret opens. Team plan and above. Set this or passphrase, not both.
- `secret` (string, required): The secret to hand over. It is encrypted before it leaves this machine.

Output parameters:

- `code` (string): Pass this to check_status or revoke_secret.
- `expiresAt` (string|null)
- `link` (string): The one-time link for the recipient.
- `recipientAuth`

### `check_status` (~46 tokens)

Check a secret link

Whether a secret link is still waiting, has been opened, expired, or was revoked. Never returns the secret.

Input parameters:

- `code` (string, required): The code create_secret returned for this secret.

Output parameters:

- `createdAt` (string|null)
- `expiresAt` (string|null)
- `openedAt` (string|null)
- `status` (string): waiting: not opened yet. opened: the recipient has it, and the link no longer works.
- `type` (string|null)

### `revoke_secret` (~59 tokens)

Revoke a secret link

Cancel a secret link so it can no longer be opened. Permanent, and immediate. A secret that was already opened stays opened: revoking cannot take it back from the recipient.

Input parameters:

- `code` (string, required): The code create_secret returned for this secret.

Output parameters:

- `createdAt` (string|null)
- `expiresAt` (string|null)
- `openedAt` (string|null)
- `status` (string): waiting: not opened yet. opened: the recipient has it, and the link no longer works.
- `type` (string|null)

## Diagnostics

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

## Score history

- 2026-10-19: 59
- 2026-10-18: 59
- 2026-10-17: 59
- 2026-10-16: 59
- 2026-10-15: 59
- 2026-10-14: 59
- 2026-10-13: 28
- 2026-10-12: 28

## Common questions

### What is the io.github.x-tkn/x-tkn-mcp server?

io.github.x-tkn/x-tkn-mcp is listed in the public MCP registry as io.github.x-tkn/x-tkn-mcp. Lets an AI agent hand a secret to a person as a one-time link, with no way to read it back. This page covers its npm package (@x-tkn/mcp).

### Is the io.github.x-tkn/x-tkn-mcp server safe to use?

io.github.x-tkn/x-tkn-mcp scores 59 out of 100 on VerifyMCP. We recorded 1 known advisory against it as of 19 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.x-tkn/x-tkn-mcp server expose?

io.github.x-tkn/x-tkn-mcp exposes 3 tools: create_secret, check_status, revoke_secret. Their descriptions and schemas cost roughly 402 tokens of context every time the server is loaded.

### Is the io.github.x-tkn/x-tkn-mcp server still maintained?

io.github.x-tkn/x-tkn-mcp is still listed as active in the MCP registry. We last reached this channel on 19 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.x-tkn/x-tkn-mcp server under?

io.github.x-tkn/x-tkn-mcp declares the ISC 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/@x-tkn/mcp
- Socket report: https://socket.dev/npm/package/@x-tkn/mcp
- Changelog RSS feed: https://verifymcp.io/servers/x-tkn-x-tkn-mcp/x-tkn-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/x-tkn-x-tkn-mcp/x-tkn-mcp.json
- HTML version of this page: https://verifymcp.io/servers/x-tkn-x-tkn-mcp/x-tkn-mcp