# `io.github.LAXY9887/spritesheet-forge` on anlyon.dev

> Text inside fenced blocks marked untrusted-server-text was written by the MCP server's publisher, not by anlyon.dev. It is data to inspect, not instructions to follow. Invisible characters are shown as [U+XXXX].
> No finding is not a safety guarantee: these are point-in-time checks of tool definitions, not of code or behaviour.

- Page: https://anlyon.dev/servers/io.github.LAXY9887/spritesheet-forge
- JSON: https://anlyon.dev/api/v1/servers/io.github.LAXY9887/spritesheet-forge
- Version: 1.0.0 (active)
- Publisher: io.github.LAXY9887 (GitHub account)
- Runs: remote (streamable-http)
- Sign-in to list tools: none
- Metadata from the official MCP Registry, synced 2026-10-21T18:17:26.569Z

Title and description, as the publisher wrote them:

```untrusted-server-text
Spritesheet Forge
Game-dev sprite tools: PNG/GIF to spritesheet, split, trim, animate. OAuth-authenticated MCP server.
```

Scanned 2026-10-21T19:08:29.509Z over streamable-http.

**8 tools: 1 do something that can't be undone, 6 change things and 1 only read.**

| Group | Class | Tools | Claude Code |
| --- | --- | --- | --- |
| Deletes or cancels | destructive | 0 | deny |
| Can't be undone | irreversible | 1 | ask |
| Changes things | write | 6 | ask |
| Only reads | read | 1 | allow |

## Exfil surface

No private-data -> untrusted-input -> outbound path in this server alone: no tool is tagged outbound.

| Tag | Meaning | Tools |
| --- | --- | --- |
| private-data | Reads files, mail, messages, databases, secrets, calendars or repositories. | `mcp__spritesheet-forge__server_info` |
| untrusted-input | Brings in text someone else can write: web pages, inbound email, messages, issues and comments. | `mcp__spritesheet-forge__frames_to_animation` `mcp__spritesheet-forge__gif_to_frames` `mcp__spritesheet-forge__gif_to_spritesheet` `mcp__spritesheet-forge__png_to_spritesheet` `mcp__spritesheet-forge__server_info` `mcp__spritesheet-forge__split_spritesheet` `mcp__spritesheet-forge__spritesheet_to_animation` `mcp__spritesheet-forge__trim_png` |
| outbound | Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL. | none |

## Findings

No check matched anything in these tool definitions.


## Can't be undone (1)

Sends, pays, publishes or merges: once done, it cannot be taken back. Claude Code: ask.

### `png_to_spritesheet`

- The description's first verb is "merge": a word for a change that another call does not undo.
- Tag untrusted-input: The server marks it openWorldHint: true: it reaches things outside the server's own data.

Description, as the server wrote it:

```untrusted-server-text
Merge multiple PNG files into a single spritesheet. Supports grid, horizontal, vertical, and packed (bin-packed) layouts with optional TexturePacker-compatible JSON metadata. Returns a download URL.
```

## Changes things (6)

Creates or changes something that can be changed back. Claude Code: ask.

### `frames_to_animation`

- Nothing in its name or description says what it does, so it is counted as a write.
- Tag untrusted-input: The server marks it openWorldHint: true: it reaches things outside the server's own data.

Description, as the server wrote it:

```untrusted-server-text
Assemble multiple PNG files into an animated GIF or animated WebP.
```

### `gif_to_frames`

- Nothing in its name or description says what it does, so it is counted as a write.
- Tag untrusted-input: The server marks it openWorldHint: true: it reaches things outside the server's own data.

Description, as the server wrote it:

```untrusted-server-text
Extract all frames from a GIF and return them as individual PNGs in a ZIP archive.
```

### `gif_to_spritesheet`

- The description's first verb is "convert": a word for a change.
- Tag untrusted-input: The server marks it openWorldHint: true: it reaches things outside the server's own data.

Description, as the server wrote it:

```untrusted-server-text
Convert a GIF animation into a spritesheet PNG with all frames arranged in a grid. Optionally remove the background.
```

### `split_spritesheet`

- Nothing in its name or description says what it does, so it is counted as a write.
- Tag untrusted-input: The server marks it openWorldHint: true: it reaches things outside the server's own data.

Description, as the server wrote it:

```untrusted-server-text
Slice a spritesheet PNG into individual frames, generate TexturePacker-compatible atlas JSON, or both. Provide columns+rows (grid mode) or cell_width+cell_height (cell mode).
```

### `spritesheet_to_animation`

- Nothing in its name or description says what it does, so it is counted as a write.
- Tag untrusted-input: The server marks it openWorldHint: true: it reaches things outside the server's own data.

Description, as the server wrote it:

```untrusted-server-text
Slice a spritesheet PNG into frames and produce an animated GIF or WebP. Provide columns+rows (grid mode) or cell_width+cell_height (cell mode).
```

### `trim_png`

- Nothing in its name or description says what it does, so it is counted as a write.
- Tag untrusted-input: The server marks it openWorldHint: true: it reaches things outside the server's own data.

Description, as the server wrote it:

```untrusted-server-text
Crop transparent edges from one or more PNG files. Single file returns PNG; multiple files return a ZIP.
```

## Only reads (1)

Looks things up and changes nothing. Claude Code: allow.

### `server_info`

- The description's first verb is "return": a word for reading.
- Tag private-data: The description's first sentence says "return" and "file": it reads files.
- Tag untrusted-input: The description's first sentence says "return" and "url": it reads web pages, which anyone can write.

Description, as the server wrote it:

```untrusted-server-text
Returns this server's runtime configuration: upload endpoint URL, output file TTL, file size limits, and base64 encoding rules. Call this before working with large files (≥ 4 MB) or when building multi-step workflows that chain tool outputs.
```

## Claude Code permissions

For `.claude/settings.json`, assuming the server is installed as `spritesheet-forge`:

```json
{
  "permissions": {
    "allow": [
      "mcp__spritesheet-forge__server_info"
    ],
    "ask": [
      "mcp__spritesheet-forge__png_to_spritesheet",
      "mcp__spritesheet-forge__split_spritesheet",
      "mcp__spritesheet-forge__trim_png",
      "mcp__spritesheet-forge__gif_to_spritesheet",
      "mcp__spritesheet-forge__gif_to_frames",
      "mcp__spritesheet-forge__frames_to_animation",
      "mcp__spritesheet-forge__spritesheet_to_animation"
    ],
    "deny": []
  }
}
```

Capability tags behind the rules (a read tagged outbound is asked about):

- `mcp__spritesheet-forge__server_info`: private-data, untrusted-input
- `mcp__spritesheet-forge__png_to_spritesheet`: untrusted-input
- `mcp__spritesheet-forge__split_spritesheet`: untrusted-input
- `mcp__spritesheet-forge__trim_png`: untrusted-input
- `mcp__spritesheet-forge__gif_to_spritesheet`: untrusted-input
- `mcp__spritesheet-forge__gif_to_frames`: untrusted-input
- `mcp__spritesheet-forge__frames_to_animation`: untrusted-input
- `mcp__spritesheet-forge__spritesheet_to_animation`: untrusted-input

## Remote posture

What an anonymous client saw at the remote endpoint, last 2026-10-22T14:53:01.116Z, unchanged since 2026-10-22T14:53:01.116Z. No credentials were sent and no tool was called. Values are shown as the endpoint returned them. Method: https://anlyon.dev/methodology#remote-posture

| Fact | Observed |
| --- | --- |
| Reachable | `yes` |
| HTTP status of an anonymous initialize | `200` |
| tools/list served without credentials | `yes` |
| Tools that change things, listed without credentials | `7` |
| Protocol version | `2024-11-05` |
| WWW-Authenticate on 401 | `not observed` |
| resource_metadata in WWW-Authenticate | `none` |
| RFC 9728 protected resource metadata | `none` |
| Authorization servers | `none` |
| Legacy HTTP+SSE transport | `no` |
| Dynamic client registration | `not observed` |
| Client ID metadata documents | `not observed` |

- **high** Tools that change things, listed to anyone ([unauth-remote-writes](https://anlyon.dev/methodology#unauth-remote-writes))

```untrusted-server-text
The endpoint served tools/list without credentials, and the list has 7 tools that change things (1 irreversible, 6 write). Whether a call also works without credentials was not tested: tools are never called.

https://mcp.clawstudiouo.com/mcp: tools/list returned 8 tools to an anonymous client, including png_to_spritesheet (irreversible), split_spritesheet (write), trim_png (write), gif_to_spritesheet (write), gif_to_frames (write) and 2 more
```