# dev.yafl/mcp (npm · @yafldev/mcp)

Agent-first E2EE file transfer over MCP: move files between machines in one tool call, gone in 24h.

- Trust score: 78/100 (medium)
- Change this week: +38
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- npm · `@yafldev/mcp`: 78/100 (this document), [markdown](https://verifymcp.io/servers/dev-yafl-mcp/yafldev-mcp.md), [page](https://verifymcp.io/servers/dev-yafl-mcp/yafldev-mcp)

## Channel facts

- Registry: `npm`
- Package: `@yafldev/mcp`
- Version: `0.1.6`
- 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**: 83/100
  - No malware found by supply-chain analysis.
  - CVE check failed: a known medium-severity CVE affects @hono/node-server 1.19.17, reached via @modelcontextprotocol/sdk > @hono/node-server. A fixed version is available.
  - No install/post-install scripts declared.
  - Only part of the dependency tree could be resolved (94 of 98), so this covers what we could see, not the whole tree.
- **Provenance & Transparency**: 97/100
  - Source repository is publicly reachable at the declared URL.
  - Cryptographically verified build provenance (signed, bound to yafldev/mcp).
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 1 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 75/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 1011 tokens (~144/item across 7 items; 7 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 dev-yafl-mcp -- npx -y @yafldev/mcp
```

### Codex

```bash
codex mcp add dev-yafl-mcp -- npx -y @yafldev/mcp
```

### opencode

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

### OpenClaw

```bash
openclaw mcp add dev-yafl-mcp --command npx --arg -y --arg @yafldev/mcp
```

### Hermes

```yaml
mcp_servers:
  dev-yafl-mcp:
    command: "npx"
    args: ["-y", "@yafldev/mcp"]
```

### Other

```json
{
  "mcpServers": {
    "dev-yafl-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@yafldev/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.

### 2026-08-02 (score 78, +73)

- [security regression] Known CVEs: unverified → fail
- [security improvement] Provenance: unverified → pass
- [security improvement] Install scripts: unverified → pass
- [security improvement] Malware scan: unverified → pass
- [security] The attested source repository moved: yafldev/mcp
- [functional regression] Schema quality: 130 → 144
- [functional regression] Security disclosure: unverified → fail
- [functional improvement] Stability: unverified → 0.23
- [functional improvement] MCP protocol: unverified → pass
- [functional improvement] Maintenance: unverified → pass
- [functional improvement] License: unverified → pass
- [functional improvement] Tool coverage: unverified → 100
- [functional improvement] Dependency health: unverified → partial
- [functional] Licence: MIT

### 2026-08-01 (score 5, −26)

- [security regression] Provenance: unverified → fail
- [security regression] Known CVEs: unverified → fail
- [security improvement] Install scripts: unverified → pass
- [security improvement] Source repository: fail → 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 regression] Tool coverage: 100 → unverified
- [functional improvement] Maintenance: unverified → pass
- [functional improvement] Dependency health: unverified → partial
- [functional improvement] License: unverified → pass
- [functional] First check of Schema quality: unverified
- [functional] Licence: MIT
- [functional] Package version: 0.1.0 → 0.1.6

### 2026-07-31 (score 31, −24)

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

### 2026-07-30 (score 55, −18)

- [security regression] Malware scan: pass → unverified

### 2026-07-29 (score 73, +13)

- [functional improvement] Schema quality: unverified → excellent

### 2026-07-28 (score 60, +20)

- [security regression] GHSA-frvp-7c67-39w9 affects this package: medium
- [security regression] Provenance: unverified → fail
- [security regression] Known CVEs: unverified → fail
- [security improvement] Install scripts: unverified → pass
- [functional improvement] Maintenance: unverified → pass
- [functional improvement] License: unverified → pass
- [functional improvement] Dependency health: unverified → partial
- [functional] Licence: MIT

### 2026-07-27 (score 40)

First indexed and scored.

## MCP tools (7)

### `upload_file` (~230 tokens)

Upload File

Encrypts and uploads exactly the file or directory at the given local `path` (absolute, or relative to the current working directory). A directory is zipped client-side into a single archive before upload. Reads only that one path – never scans unrelated files or directories. Returns a shareable link (24h expiry, 100MB cap) with the decryption key embedded in the URL fragment; the key is never sent to the API. Optionally make the link one-time (burned after the first download) or password-protected.

Input parameters:

- `oneTime` (boolean): When true, the link is destroyed after the first successful download – a second download attempt returns a not_found-style error. Defaults to false (the link stays live until its normal 24h expiry).
- `password` (string): Optional password to protect the link. Composed into the decryption key on the client via a fresh salt – never transmitted to the API. When set, the returned link requires this same password to decry…
- `path` (string, required): Absolute or cwd-relative path to the local file or directory to upload

### `get_status` (~111 tokens)

Get Transfer Status

Checks whether the YAFL share link at the given `url` is still live — live, expired, or not found — without downloading or decrypting anything. Returns liveness, size, and expiry only. Does not read the decryption key even if present in the URL fragment, and never fetches any file bytes.

Input parameters:

- `url` (string, required): A YAFL share URL, e.g. https://yafl.dev/t/{id}#{key} (the fragment/key is ignored by this tool)

### `download_file` (~262 tokens)

Download File

Downloads and decrypts exactly the one file referenced by the given YAFL share `url`, writing it only into `destDir` (default: the current working directory) — never anywhere else. Requires the decryption key embedded in the URL fragment; the key is used only locally to decrypt and is never sent to the API. No YAFL API key is required for retrieval — anyone holding the link can download it; only uploading or managing files requires a key. Optionally pass a `password` for password-protected links.

Input parameters:

- `destDir` (string): Directory to write the downloaded file into (absolute or cwd-relative); defaults to the current working directory. The file is written only inside this directory.
- `password` (string): Password for a password-protected (v2) link. Used only locally to derive the decryption key — never sent to the API. Required when the link is password-protected; omitting it on such a link returns a…
- `url` (string, required): A YAFL share URL including the fragment key (e.g. https://yafl.dev/t/{id}#{key}), OR the compact {id}#{key} retrieval code printed alongside it — both resolve identically.

### `list_files` (~87 tokens)

List Files

Lists the caller's OWN YAFL transfers only — metadata only (id, size, status, expiry, and a download path). Never returns file contents, never a decrypted name, and never another account's files. Optionally cap the number of results with `limit`.

Input parameters:

- `limit` (integer): Maximum number of transfers to return (most recent first). Omit for the full capped list.

### `delete_file` (~105 tokens)

Delete File

Permanently deletes ONE of the caller's own YAFL transfers, identified by `id` (a bare transfer id or a full share URL — the fragment/key, if present, is never read). This cannot be undone: the R2 object is purged and the transfer record is removed. Destructive action.

Input parameters:

- `id` (string, required): A YAFL transfer id, or a full share URL, e.g. https://yafl.dev/t/{id}#{key}

### `email_link` (~113 tokens)

Email a Share Link

Emails this YAFL share link to a recipient. The link carries the decryption key in its fragment – anyone with access to that inbox can open the file. Requires a verified account.

Input parameters:

- `link` (string, required): A YAFL share URL including the fragment key (e.g. https://yafl.dev/t/{id}#{key}), OR the compact {id}#{key} retrieval code printed alongside it — both resolve identically.
- `recipient` (string, required): The email address to send the share link to.

### `login` (~103 tokens)

Log In

Starts a device-code login for an MCP agent that has no shell. Returns a verification URL and a short user code for the human to open and approve in a browser; approving is a one-time email-link sign-in that proves the human controls the account. This tool does NOT open a browser itself - relay the returned URL and code to the human. Once approved, the minted API key is stored locally and subsequent tool calls in this session authenticate automatically, with no further action needed.

## Diagnostics

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

## Score history

- 2026-08-03: 78
- 2026-08-02: 78
- 2026-08-01: 5
- 2026-07-31: 31
- 2026-07-30: 55
- 2026-07-29: 73
- 2026-07-28: 60
- 2026-07-27: 40

## Links

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