# mc-asset — Minecraft Pixel Asset Engine (npm · mc-asset)

Deterministic Minecraft pixel-art engine: textures, animation sheets, and pack validation.

- Trust score: 80/100 (high trust)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-24

## Components

- npm · `mc-asset`: 80/100 (this document), [markdown](https://verifymcp.io/servers/smile-minecraft-mc-asset/mc-asset.md), [page](https://verifymcp.io/servers/smile-minecraft-mc-asset/mc-asset)

## Channel facts

- Registry: `npm`
- Package: `mc-asset`
- Version: `0.3.2`
- 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 2026-09-24.

- **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.
  - 33 of 101 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 97/100
  - Source repository is publicly reachable at the declared URL.
  - Cryptographically verified build provenance (signed, bound to smile-minecraft/mc-asset).
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 0 days ago).
  - Security-disclosure policy not yet verified: we couldn't inspect the source repository.
- **Schema Quality & AI Usability**: 64/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 4012 tokens (~191/item across 21 items; 21 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 10/100
  - Stability observed for 3 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.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 21 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 21 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 mc-asset — Minecraft Pixel Asset Engine MCP server?

mc-asset — Minecraft Pixel Asset Engine runs locally as an npm package, launched with npx -y mc-asset. 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 smile-minecraft-mc-asset -- npx -y mc-asset
```

### Cursor

```json
{
  "mcpServers": {
    "smile-minecraft-mc-asset": {
      "command": "npx",
      "args": [
        "-y",
        "mc-asset"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "smile-minecraft-mc-asset": {
      "command": "npx",
      "args": [
        "-y",
        "mc-asset"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add smile-minecraft-mc-asset -- npx -y mc-asset
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "smile-minecraft-mc-asset": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "mc-asset"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add smile-minecraft-mc-asset --command npx --arg -y --arg mc-asset
```

### Hermes

```yaml
mcp_servers:
  smile-minecraft-mc-asset:
    command: "npx"
    args: ["-y", "mc-asset"]
```

### Netclaw

```json
{
  "McpServers": {
    "smile-minecraft-mc-asset": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "mc-asset"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add smile-minecraft-mc-asset -t stdio -c npx -a -y mc-asset
```

### Other

```json
{
  "mcpServers": {
    "smile-minecraft-mc-asset": {
      "command": "npx",
      "args": [
        "-y",
        "mc-asset"
      ]
    }
  }
}
```

## 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.

### 2026-09-24 (score 80, +11)

- [security improvement] Known CVEs: unverified → pass
- [functional regression] Security disclosure: fail → unverified
- [functional improvement] Dependency health: unverified → 0.84

### 2026-09-23 (score 69, 0)

- [security regression] Known CVEs: pass → unverified
- [security regression] Tool safety: pass → unverified
- [security improvement] Provenance: 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.
- [security] The attested source repository moved: smile-minecraft/mc-asset
- [functional regression] Schema quality: 3415 → 4012
- [functional regression] Capabilities: pass → unverified
- [functional regression] Dependency health: 0.84 → unverified
- [functional regression] Tool coverage: 100 → unverified
- [functional improvement] Stability: unverified → 0.07
- [functional] First check of Schema quality: unverified
- [functional] Package version: 0.3.1 → 0.3.2

### 2026-09-22 (score 69, 0)

- [functional regression] Security disclosure: unverified → fail

### 2026-09-21 (score 69)

First indexed and scored.

## MCP tools (21)

### `analyze_asset` (~169 tokens)

Analyze a raster image (PNG, JPEG, WebP) and return a read-only report: dimensions, palette, predicted alpha classification, pixel-art characteristics, and processing recommendations. Reads only, never writes.

Input parameters:

- `minecraftVersion` (string): Release Minecraft version 1.19.3 through 26.3 (for example "1.19.3", "1.21.4", "26.3"). Omitted means engine defaults.
- `path` (string, required): Raster image path (PNG, JPEG, WebP).
- `profile` (string): Asset profile; omitted means generic.
- `resourcePackVersion` (string): Target resource-pack version as N or N.M (e.g. 84, 97.1); normalized to major.minor. Omitted means engine defaults.

### `pixelize_asset` (~197 tokens)

Run a reference raster image through the deterministic pixelize pipeline and return PNG bytes and/or the editable .mcpx source. The input must be PNG, JPEG, or WebP, never .mcpx.

Input parameters:

- `inputPath` (string, required): Reference raster image path (PNG, JPEG, WebP; never .mcpx).
- `outputMcpxPath` (string): Explicit .mcpx output path. When omitted, the .mcpx text is embedded in the result instead of written to disk.
- `outputPngPath` (string): Explicit PNG output path. When omitted, the PNG bytes are embedded in the result instead of written to disk.
- `preset` (string): Processing preset: item, block, generic, gui, particle.
- `profile` (string): Asset profile; omitted means generic.
- `size` (string): Output size: 16, 32, 64, 128, or WxH.

### `render_pixel_asset` (~206 tokens)

Render a hand-authored ASCII Grid (inline text or a .grid file, exactly one) into PNG bytes and/or the editable .mcpx source, with an optional batch applied after parsing. For pixel-level authorship without per-pixel tool calls.

Input parameters:

- `gridPath` (string): Standalone ASCII Grid file path. Exactly one of gridPath and gridText is required.
- `gridText` (string): Inline ASCII Grid document text. Exactly one of gridPath and gridText is required.
- `operations` (string): Optional batch operations JSON text applied after the grid is parsed.
- `outputMcpxPath` (string): Explicit .mcpx output path. When omitted, the .mcpx text is embedded in the result instead of written to disk.
- `outputPngPath` (string): Explicit PNG output path. When omitted, the PNG bytes are embedded in the result instead of written to disk.
- `profile` (string): Asset profile; omitted means generic.

### `apply_asset_operations` (~218 tokens)

Apply a batch of Core pixel/layer/region operations to an editable .mcpx source in one call (atomic by default: the first failure rolls everything back). This is the batch-edit slot; never split pixel work across hundreds of per-pixel tool calls.

Input parameters:

- `atomic` (boolean): Default true: the first failure rolls the canvas back and the whole batch fails.
- `feedback` (object): Optional visual feedback for the batch; absent keeps the output fields and bytes exactly as before.
- `operations` (array, required): Batch operations applied in order in a single call; never split pixel work across hundreds of tool calls.
- `outputMcpxPath` (string): Explicit .mcpx output path. When omitted, the .mcpx text is embedded in the result instead of written to disk.
- `outputPngPath` (string): Explicit PNG output path. When omitted, the PNG bytes are embedded in the result instead of written to disk.
- `sourcePath` (string, required): Editable .mcpx source path the batch runs against.

### `recolor_asset` (~171 tokens)

Recolor an editable .mcpx source with a builtin material id, optionally limited to one region id, and return PNG bytes and/or the recolored source.

Input parameters:

- `material` (string, required): Builtin material id to apply.
- `outputMcpxPath` (string): Explicit .mcpx output path. When omitted, the .mcpx text is embedded in the result instead of written to disk.
- `outputPngPath` (string): Explicit PNG output path. When omitted, the PNG bytes are embedded in the result instead of written to disk.
- `profile` (string): Asset profile; omitted means generic.
- `region` (string): Limit the write to one region id; otherwise every layer is recolored.
- `sourcePath` (string, required): Editable .mcpx source path to recolor.

### `create_variants` (~120 tokens)

Fan out one editable .mcpx source into per-material variants under an explicit output directory, each starting from the pristine source so reruns stay byte-identical.

Input parameters:

- `materials` (array, required): Builtin material ids, one variant per entry, each starting from the pristine source.
- `outputDir` (string, required): Explicit output directory receiving <stem>_<material>.png plus .mcpx per material.
- `profile` (string): Asset profile; omitted means generic.
- `sourcePath` (string, required): Editable .mcpx source path to fan out from.

### `validate_asset` (~180 tokens)

Validate an asset file and return a read-only verdict with findings. Reads only, never writes; an optional explicit .mcmeta path is used verbatim.

Input parameters:

- `mcmetaPath` (string): Explicit .mcmeta path used verbatim; a sibling file is never derived.
- `minecraftVersion` (string): Release Minecraft version 1.19.3 through 26.3 (for example "1.19.3", "1.21.4", "26.3"). Omitted means engine defaults.
- `path` (string, required): Asset file path to validate (PNG).
- `profile` (string): Asset profile; omitted means generic.
- `resourcePackVersion` (string): Target resource-pack version as N or N.M (e.g. 84, 97.1); normalized to major.minor. Omitted means engine defaults.

### `import_asset` (~170 tokens)

Decode a raster image (PNG, JPEG, WebP) into the Pixel Canvas with an optional batch applied after import. Returns PNG bytes and/or the editable .mcpx source via explicit output paths or embedded artifacts; no force, mkdir, or in-place writes.

Input parameters:

- `inputPath` (string, required): Raster image path (PNG, JPEG, WebP).
- `operations` (string): Optional batch operations JSON text.
- `outputMcpxPath` (string): Explicit .mcpx output path. When omitted, the .mcpx text is embedded in the result instead of written to disk.
- `outputPngPath` (string): Explicit PNG output path. When omitted, the PNG bytes are embedded in the result instead of written to disk.
- `profile` (string): Asset profile; omitted means generic.

### `build_asset` (~164 tokens)

Build an editable .mcpx source into a texture or re-serialize the source, with an optional batch applied after parsing. Returns PNG bytes and/or the built source via explicit output paths or embedded artifacts; no force, mkdir, or in-place writes.

Input parameters:

- `operations` (string): Optional batch operations JSON text.
- `outputMcpxPath` (string): Explicit .mcpx output path. When omitted, the .mcpx text is embedded in the result instead of written to disk.
- `outputPngPath` (string): Explicit PNG output path. When omitted, the PNG bytes are embedded in the result instead of written to disk.
- `profile` (string): Asset profile; omitted means generic.
- `sourcePath` (string, required): Editable .mcpx source path.

### `transform_asset` (~351 tokens)

Apply one spatial transformation (flip, rotate, crop, pad, resize, or translate) to a raster image or .mcpx source. Returns PNG bytes and/or the editable source via explicit output paths or embedded artifacts; no force, mkdir, or in-place writes.

Input parameters:

- `crop` (string): Crop rectangle as x,y,w,h.
- `flip` (string): Flip axis: h or v.
- `inputPath` (string, required): Raster image or .mcpx path to transform.
- `outputMcpxPath` (string): Explicit .mcpx output path. When omitted, the .mcpx text is embedded in the result instead of written to disk.
- `outputPngPath` (string): Explicit PNG output path. When omitted, the PNG bytes are embedded in the result instead of written to disk.
- `pad` (string): Padding as l,t,r,b.
- `padColor` (string): Pad color as hex or "transparent".
- `profile` (string): Asset profile; omitted means generic.
- `resize` (string): Target size as WxH.
- `resizeMode` (string): Resize sampling: nearest, box, or pixel-aware.
- `rotate` (number): Rotation in degrees: 90, 180, or 270.
- `selection` (string): Scope operations to a selection expression: all, rect:x,y,w,h, region:id, alpha[:layer], color[:layer]:r,g,b,a, connected[:layer]:x,y, or a JSON expression object with op union|intersect|subtract|inv…
- `translate` (string): Translation offset as dx,dy.

### `quantize_asset` (~230 tokens)

Reduce the distinct colors of a raster image or .mcpx source to a target count, optionally scoped by a selection. Returns PNG bytes and/or the editable source via explicit output paths or embedded artifacts; no force, mkdir, or in-place writes.

Input parameters:

- `colors` (number, required): Target distinct color count.
- `inputPath` (string, required): Raster image or .mcpx path to quantize.
- `outputMcpxPath` (string): Explicit .mcpx output path. When omitted, the .mcpx text is embedded in the result instead of written to disk.
- `outputPngPath` (string): Explicit PNG output path. When omitted, the PNG bytes are embedded in the result instead of written to disk.
- `profile` (string): Asset profile; omitted means generic.
- `selection` (string): Scope operations to a selection expression: all, rect:x,y,w,h, region:id, alpha[:layer], color[:layer]:r,g,b,a, connected[:layer]:x,y, or a JSON expression object with op union|intersect|subtract|inv…

### `cleanup_asset` (~258 tokens)

Detect or eliminate isolated, noise, or outlier pixels in a raster image or .mcpx source, optionally scoped by a selection. Returns PNG bytes and/or the editable source via explicit output paths or embedded artifacts; no force, mkdir, or in-place writes.

Input parameters:

- `allowRenderPassChange` (boolean): Allow fixes that change the render pass (alpha-affecting classes).
- `fix` (string): Comma-separated fix classes to eliminate.
- `inputPath` (string, required): Raster image or .mcpx path to clean up.
- `outputMcpxPath` (string): Explicit .mcpx output path. When omitted, the .mcpx text is embedded in the result instead of written to disk.
- `outputPngPath` (string): Explicit PNG output path. When omitted, the PNG bytes are embedded in the result instead of written to disk.
- `profile` (string): Asset profile; omitted means generic.
- `selection` (string): Scope operations to a selection expression: all, rect:x,y,w,h, region:id, alpha[:layer], color[:layer]:r,g,b,a, connected[:layer]:x,y, or a JSON expression object with op union|intersect|subtract|inv…

### `palette_asset` (~73 tokens)

Run the palette extract or inspect subcommand over an image and return a read-only report of unique colors, distribution, roles, or contrast. Reads only, never writes.

Input parameters:

- `inputPath` (string, required): Raster image or .mcpx path to inspect.
- `mode` (string, required): Palette subcommand: extract or inspect.

### `material_asset` (~68 tokens)

Run the material list or show subcommand and return a read-only report of builtin material definitions or one material's color ramps. Reads only, never writes.

Input parameters:

- `mode` (string, required): Material subcommand: list or show.
- `name` (string): Material name to show; required for show.

### `tile_asset` (~181 tokens)

Analyze seams, edge repetition, and brightness continuity of a tileable image, with an optional tiled preview grid. Reads the input and returns a report, or writes a preview PNG only to the explicit output path; never invents filenames.

Input parameters:

- `brightnessMatch` (string): Brightness-match axis: horizontal, vertical, or both.
- `edgeMatch` (string): Edge-match axis: horizontal, vertical, or both.
- `inputPath` (string, required): Raster image or .mcpx path for seam analysis.
- `outputPngPath` (string): Explicit PNG output path. When omitted, the PNG bytes are embedded in the result instead of written to disk.
- `preview` (string): Tiled preview grid: 2x2, 4x4, or 8x8.
- `profile` (string): Asset profile; omitted means generic.

### `generate_asset` (~229 tokens)

Generate a deterministic procedural texture from a named pattern, size, palette, and seed. Returns PNG bytes and/or the editable .mcpx source via explicit output paths or embedded artifacts; no force, mkdir, or in-place writes.

Input parameters:

- `outputMcpxPath` (string): Explicit .mcpx output path. When omitted, the .mcpx text is embedded in the result instead of written to disk.
- `outputPngPath` (string): Explicit PNG output path. When omitted, the PNG bytes are embedded in the result instead of written to disk.
- `palette` (string, required): Builtin material name or .mcpx path for colors.
- `pattern` (string, required): Procedural pattern: noise, clustered-noise, stripes, checker, gradient, brick, spots, veins, cracks, or grain.
- `profile` (string): Asset profile; omitted means generic.
- `seed` (integer, required): Deterministic seed: integer 0-4294967295.
- `size` (string, required): Output size: 16, 32, 64, 128, or WxH.

### `preview_asset` (~166 tokens)

Preview an image in ascii, palette-map, scale, or nine-slice mode. Read-only except scale and nine-slice, which may write a PNG only to the explicit output path; never invents filenames.

Input parameters:

- `inputPath` (string, required): Raster image or .mcpx path to preview.
- `mcmetaPath` (string): Explicit .mcmeta path used by nine-slice mode.
- `mode` (string, required): Preview mode: ascii, palette-map, scale, or nine-slice.
- `outputPngPath` (string): Explicit PNG output path. When omitted, the PNG bytes are embedded in the result instead of written to disk.
- `profile` (string): Asset profile; omitted means generic.
- `scale` (number): Upscale factor for scale mode.

### `animate_asset` (~290 tokens)

Run one animation subcommand (pack, unpack, reorder, resize, validate, or preview) over frames or a sprite sheet. Pack writes a sheet PNG only to the explicit output path and unpack, reorder, and resize write frames only to the explicit output directory; validate and preview return read-only reports.

Input parameters:

- `columns` (number): Grid column count.
- `frameSize` (string): Frame size as N or WxH.
- `framesDir` (string): Frames directory for pack, reorder, resize, validate, preview.
- `layout` (string): Sheet layout: vertical, horizontal, or grid. Required for pack, unpack, and preview.
- `mcmetaPath` (string): Explicit .mcmeta path used by unpack and validate.
- `mode` (string, required): Animation subcommand: pack, unpack, reorder, resize, validate, or preview.
- `order` (string): Frame order for reorder as i,j,...
- `outputDir` (string): Explicit output directory for unpack, reorder, and resize.
- `outputPngPath` (string): Explicit PNG output path. When omitted, the PNG bytes are embedded in the result instead of written to disk.
- `profile` (string): Asset profile; omitted means generic.
- `resizeMode` (string): Resize sampling: nearest, box, or pixel-aware.
- `sheetPath` (string): Sprite sheet path used as unpack input.

### `validate_pack_asset` (~176 tokens)

Scan a resource pack root for namespace, model, texture, and atlas integrity and return a read-only verdict with findings. Reads only, never writes.

Input parameters:

- `dependencyPaths` (array): Dependency pack roots; the first entry has the highest priority.
- `minecraftVersion` (string): Release Minecraft version 1.19.3 through 26.3 (for example "1.19.3", "1.21.4", "26.3"). Omitted means engine defaults.
- `packPath` (string, required): Resource pack root directory.
- `resourcePackVersion` (string): Target resource-pack version as N or N.M (e.g. 84, 97.1); normalized to major.minor. Omitted means engine defaults.
- `vanillaPath` (string): Vanilla assets directory used to resolve minecraft references.

### `scale_gui_asset` (~231 tokens)

Scale a GUI sprite to N or WxH with the mcmeta stretch/tile/nine_slice mapping. Returns PNG bytes and/or the scaled PNG via an explicit output path; never invents filenames.

Input parameters:

- `inputPath` (string, required): Raster image or .mcpx path to scale as a GUI sprite.
- `mcmetaPath` (string): Explicit .mcmeta path for the scaling section, used verbatim; omitted means stretch.
- `minecraftVersion` (string): Release Minecraft version 1.19.3 through 26.3 (for example "1.19.3", "1.21.4", "26.3"). Omitted means engine defaults.
- `outputPngPath` (string): Explicit PNG output path. When omitted, the PNG bytes are embedded in the result instead of written to disk.
- `resourcePackVersion` (string): Target resource-pack version as N or N.M (e.g. 84, 97.1); normalized to major.minor. Omitted means engine defaults.
- `size` (string, required): Target size: N or WxH.

### `inspect_asset` (~164 tokens)

Inspect an editable .mcpx source or raster image without writing: structure reports layers, regions, color usage, and overlaps; view returns the composited PNG plus metadata. Raster inputs read as a single base layer.

Input parameters:

- `crop`: View-only selection expression (atom string or JSON expression object) naming the crop; an empty match refuses with EMPTY_SELECTION.
- `inputPath` (string, required): Editable .mcpx source or raster image path to inspect; raster inputs read as a single base layer. Never written.
- `mode` (string, required): Inspect mode: structure for layers, regions, color usage, and overlaps; view for the composited PNG plus metadata.
- `scale` (integer): View-only integer upscale factor 1-16 with nearest sampling; omitted means 1.

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/smile-minecraft-mc-asset/mc-asset#diagnostics

## Score history

- 2026-09-24: 80
- 2026-09-23: 69
- 2026-09-22: 69
- 2026-09-21: 69

## Common questions

### What is the mc-asset — Minecraft Pixel Asset Engine MCP server?

mc-asset — Minecraft Pixel Asset Engine is an MCP server listed in the public MCP registry as io.github.smile-minecraft/mc-asset. Deterministic Minecraft pixel-art engine: textures, animation sheets, and pack validation. This page covers its npm package (mc-asset).

### Is the mc-asset — Minecraft Pixel Asset Engine MCP server safe to use?

mc-asset — Minecraft Pixel Asset Engine scores 80 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 24 September 2026. It declares no install or post-install scripts. Its build provenance is signed and verified. 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 mc-asset — Minecraft Pixel Asset Engine MCP server expose?

mc-asset — Minecraft Pixel Asset Engine exposes 21 tools: analyze_asset, pixelize_asset, render_pixel_asset, apply_asset_operations, recolor_asset, and 16 more. Their descriptions and schemas cost roughly 4,012 tokens of context every time the server is loaded.

### Is the mc-asset — Minecraft Pixel Asset Engine MCP server still maintained?

mc-asset — Minecraft Pixel Asset Engine is still listed as active in the MCP registry. We last reached this channel on 24 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 mc-asset — Minecraft Pixel Asset Engine MCP server under?

mc-asset — Minecraft Pixel Asset Engine 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/mc-asset
- Socket report: https://socket.dev/npm/package/mc-asset
- Repository: https://github.com/smile-minecraft/mc-asset
- Changelog RSS feed: https://verifymcp.io/servers/smile-minecraft-mc-asset/mc-asset.xml
- Changelog JSON feed: https://verifymcp.io/servers/smile-minecraft-mc-asset/mc-asset.json
- HTML version of this page: https://verifymcp.io/servers/smile-minecraft-mc-asset/mc-asset