# keyline (oci · ghcr.io/keyline-dev/keyline-mcp)

Design engine for AI agents: images and video at every size, no Chrome needed

- Trust score: 34/100 (low)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-04

## Components

- mcpb · `keyline-mcp-0.7.0.mcpb`: 17/100, [markdown](https://verifymcp.io/servers/keyline-dev-keyline/keyline-mcp.md), [page](https://verifymcp.io/servers/keyline-dev-keyline/keyline-mcp)
- oci · `ghcr.io/keyline-dev/keyline-mcp`: 34/100 (this document), [markdown](https://verifymcp.io/servers/keyline-dev-keyline/ghcr-io-keyline-dev-keyline-mcp.md), [page](https://verifymcp.io/servers/keyline-dev-keyline/ghcr-io-keyline-dev-keyline-mcp)

## Channel facts

- Registry: `oci`
- Package: `ghcr.io/keyline-dev/keyline-mcp`
- Version: `0.7.0`
- 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 2026-10-04.

- **Supply Chain Security**: 0/100
  - No malware scan is available for this kind of package: the supply-chain vendors we use do not cover it. This is a permanent gap in our coverage, not a finding about the package.
  - Known CVEs could not be checked: this artifact ships no SBOM or dependency manifest, so there is no dependency list to read.
  - Install-script risk not yet assessed.
  - Dependency health could not be checked: this artifact ships no SBOM or dependency manifest, so there is no dependency list to read.
- **Provenance & Transparency**: 35/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - License check failed: the license (PolyForm-Shield-1.0.0) isn't a recognized OSI-approved license.
  - Actively maintained (last published 1 days ago).
  - Publishes a security disclosure policy (SECURITY.md).
- **Schema Quality & AI Usability**: 56/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 2453 tokens (~408/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**: 0/100
  - Stability check failed: the tool surface changed between 0.6.0 and 0.7.0: 0 tool removals, 4 breaking changes, 0 additions.
- **Tool Coverage**: 87/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 62% 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.
  - We read all 6 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 7 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a current MCP spec version (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 keyline MCP server?

keyline runs locally as a container image, launched with docker run --rm -i ghcr.io/keyline-dev/keyline-mcp:0.7.0. Ready-made configuration for Claude, Cursor, VS Code, Codex and 3 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add keyline-dev-keyline -- docker run --rm -i ghcr.io/keyline-dev/keyline-mcp:0.7.0
```

### Cursor

```json
{
  "mcpServers": {
    "keyline-dev-keyline": {
      "command": "docker",
      "args": [
        "run",
        "--rm",
        "-i",
        "ghcr.io/keyline-dev/keyline-mcp:0.7.0"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "keyline-dev-keyline": {
      "command": "docker",
      "args": [
        "run",
        "--rm",
        "-i",
        "ghcr.io/keyline-dev/keyline-mcp:0.7.0"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add keyline-dev-keyline -- docker run --rm -i ghcr.io/keyline-dev/keyline-mcp:0.7.0
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "keyline-dev-keyline": {
      "type": "local",
      "command": [
        "docker",
        "run",
        "--rm",
        "-i",
        "ghcr.io/keyline-dev/keyline-mcp:0.7.0"
      ],
      "enabled": true
    }
  }
}
```

### Hermes

```yaml
mcp_servers:
  keyline-dev-keyline:
    command: "docker"
    args: ["run", "--rm", "-i", "ghcr.io/keyline-dev/keyline-mcp:0.7.0"]
```

### Netclaw

```json
{
  "McpServers": {
    "keyline-dev-keyline": {
      "Transport": "stdio",
      "Command": "docker",
      "Arguments": [
        "run",
        "--rm",
        "-i",
        "ghcr.io/keyline-dev/keyline-mcp:0.7.0"
      ]
    }
  }
}
```

### Other

```json
{
  "mcpServers": {
    "keyline-dev-keyline": {
      "command": "docker",
      "args": [
        "run",
        "--rm",
        "-i",
        "ghcr.io/keyline-dev/keyline-mcp:0.7.0"
      ]
    }
  }
}
```

## 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.

### 2026-10-04 (score 34, +1)

- [functional improvement] Security disclosure: fail → pass

### 2026-10-02 (score 33, −1)

- [security regression] Stability: unverified → fail
- [functional regression] Tool coverage: 67% → 62%
- [functional] Schema quality: excellent → good
- [functional] Package version: 0.6.0 → 0.7.0

### 2026-09-30 (score 34)

First indexed and scored.

## MCP tools (6)

### `asset_add` (~132 tokens)

Add an image (PNG, JPEG, SVG) to a scene's assets from url or base64. Returns id and size. Or a video (mp4, mov, webm) or sound (mp3, m4a, wav) by path or url.

Input parameters:

- `base64` (string): Or the file bytes, base64 (small files only: they pass through the model).
- `id` (string): Asset id to use in layers; generated if omitted.
- `sceneId` (string, required)
- `url` (string): Public http(s) URL of a PNG, JPEG or SVG.

### `layer_add` (~1292 tokens)

Add layers, drawn bottom to top. CSS names and values. Any layer: {type, id?, role?, parent? (frame id), x, y (px or "25%"), width, height (px, "hug", "fill", "40%"), min/maxWidth, min/maxHeight, aspectRatio, place top-left…bottom-right + margin, constraints {horizontal: left|right|center|stretch|scale, vertical: top|bottom|center|stretch|scale}, hidden, opacity, rotate (deg), blendMode, style (name or list), media {size id or landscape|square|portrait|wide|tall: {fields}}, fill, stroke, shadow (each one or a list), blur, backdropBlur, borderRadius (px, [tl,tr,br,bl], "full"), mask, scale, translate [x,y], skew, flipX, flipY, edges {sides, depth, seed}}. frame: children, clipsContent (true). Stack: flexDirection row|column|row-reverse|column-reverse (a list is tried in order), gap, padding, alignItems stretch (default)|flex-start|center|flex-end|baseline, justifyContent flex-start|center|flex-end|space-between|space-around|space-evenly, flexWrap; children: alignSelf, flexGrow (alone, it fills), layoutPriority (number; lower gives way first), position absolute. Grid: gridTemplateColumns/Rows (CSS tracks, repeat(auto-fill, minmax(160px, 1fr))), gridTemplateAreas ["hero side", …], gap, padding; children: gridArea, or gridRow/gridColumn ("1 / span 2"). spacer: free space in a stack. firstFit: children; draws the first that fits. text: text (markup <b> <i> <u> <s> <sup> <sub> <br>, <span style="color:…;font-weight:…">, style names as tags), fontSize (the max when fitting), fontWeight, color, fontFamily (Inter or any Google Font), textAlign, textAlignVertical, lineHeight (× fontSize), letterSpacing (px), fill (paints the letters, wins over color), textTransform, fontStyle, textDecoration, maxLines, textWrap balance|pretty, trim "cap", highlight, padding, curve, leader ("." fills a tab gap), knockout. Text box: width+height → shrinks to fit (minimumScaleFactor 0.5) then ellipsis; width → wraps down; neither → one line. image: asset, fit cover|contain|fill|tile, focus [x,y…

Input parameters:

- `components` (object): Named layer trees to add or replace, placed by `use` layers.
- `layers` (array, required)
- `sceneId` (string, required)
- `styles` (object): Named styles to add or replace: layer fields a layer's `style` pulls in.
- `tokens` (object): Named values to add or replace, used as {{name}} in any field or text.

### `layer_update` (~172 tokens)

Change or delete layers atomically. Each op: {target: {id}|{role}|{style}|{component, role?}, set: {fields}} or {target, delete: true} or {target: {id}, detach: true} (a use becomes plain layers). A role targets every layer with it; a style or component target changes it everywhere it's used. tokens {name: value} changes tokens. null resets a field. {target: {scene: true}, set: {background, sizes, duration, fps, loop, audio {asset, volume, trimStart, fadeIn, fadeOut}}} changes the scene.

Input parameters:

- `ops` (array, required)
- `sceneId` (string, required)
- `tokens` (object): Tokens to change; every field using one follows.

### `render` (~213 tokens)

Render each size (PNG, or format jpeg|webp|pdf). Returns each size's path and layout as drawn; maxKB lowers quality to fit; rows renders a variant per row of tokens. preview adds a small image of all sizes. apng, gif, mp4 or webm (mp4/webm need ffmpeg) renders the motion, its preview key moments; time (s) a still; muted drops the sound.

Input parameters:

- `format` (string): png|jpeg|webp|pdf|apng|gif|mp4|webm
- `maxKB` (integer)
- `muted` (boolean)
- `preview` (boolean)
- `quality` (integer): 0–100 (90)
- `rows` (array): Variants: one render per row of token values, e.g. [{"headline": "Sale"}]
- `sceneId` (string, required)
- `sizes` (array): Size ids; all if omitted.
- `time` (number)

### `scene_create` (~222 tokens)

Create a scene from sizes, or from a template by url or path with its tokens set. Returns its id.

Input parameters:

- `background` (string): Any CSS color (#FFFFFF).
- `duration` (number): Seconds: makes it move
- `fps` (number): (30)
- `height` (number)
- `loop` (boolean)
- `sizes` (array): Target sizes: {id, width, height, scale, safeArea}, a preset (instagram-portrait|-square|-story, facebook-feed, linkedin-post, x-post, youtube-thumbnail, iab-medium-rectangle|-leaderboard|-skyscraper…
- `tokens` (object): The template's variables to set: {name: value}
- `url` (string): Or start from a template: a scene JSON file by url
- `width` (number): Master size, px; the first size's when omitted.

### `scene_describe` (~110 tokens)

Problems per size, or ok. Defects: !truncated|!overflow (W×H) !clipped !hidden !overlaps !covered !unsafe (safeArea). Advisory: warn contrast. full: the layout.

Input parameters:

- `full` (boolean): Every layer's box, not just warnings.
- `sceneId` (string, required)
- `size` (string): One size id; all sizes if omitted.
- `view` (string): Image id: the photo, with px rulers.

## Diagnostics

Captured diagnostic sections: Provenance. The full working is on the page: https://verifymcp.io/servers/keyline-dev-keyline/ghcr-io-keyline-dev-keyline-mcp#diagnostics

## Score history

- 2026-10-04: 34
- 2026-10-03: 33
- 2026-10-02: 33
- 2026-10-01: 34
- 2026-09-30: 34

## Common questions

### What is the keyline MCP server?

keyline is an MCP server listed in the public MCP registry as io.github.keyline-dev/keyline. Design engine for AI agents: images and video at every size, no Chrome needed. This page covers its container image (ghcr.io/keyline-dev/keyline-mcp).

### Is the keyline MCP server safe to use?

keyline scores 34 out of 100 on VerifyMCP. 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 keyline MCP server expose?

keyline exposes 6 tools: asset_add, layer_add, layer_update, render, scene_create, scene_describe. Their descriptions and schemas cost roughly 2,141 tokens of context every time the server is loaded.

### Is the keyline MCP server still maintained?

keyline is still listed as active in the MCP registry. We last reached this channel on 4 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 keyline MCP server under?

keyline declares the PolyForm-Shield-1.0.0 licence, which is not on the OSI-approved list. Read the terms before using it at work, and note this covers the source only, not the cost of any service it calls.

## Links

- GitHub Container Registry: https://ghcr.io/keyline-dev/keyline-mcp
- Repository: https://github.com/keyline-dev/keyline
- Website: https://keyline.dev/
- Changelog RSS feed: https://verifymcp.io/servers/keyline-dev-keyline/ghcr-io-keyline-dev-keyline-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/keyline-dev-keyline/ghcr-io-keyline-dev-keyline-mcp.json
- HTML version of this page: https://verifymcp.io/servers/keyline-dev-keyline/ghcr-io-keyline-dev-keyline-mcp