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SpriteForge Editor

tech.spriteforge/editorspriteforge.techstreamable-httpv0.1.0Scanned

Free pixel and tileset editor, no account: hand-edit sprites, animations and Wang tilesets in chat

6 tools: 5 change things and 1 only read.

Tools: 0 delete, 0 irreversible, 5 write, 1 read.
  • Reads private data · 0
  • Reads text others write · 4
  • Can send data out · 0
  • No findings

Anlyon alternative

5 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

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Tools

Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.

6 tools

Changes things 5Claude Code: ask
  • load_artLoads an edit session's sprite into the SpriteForge editor card.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Loads an edit session's sprite into the SpriteForge editor card. Only the card calls it.

    Annotations the server declares

    • title: Load an edit session into the editor card
    • readOnlyHint: true
    • openWorldHint: false
  • open_editorOpens pixel art in SpriteForge's compact pixel editor - pencil, eraser, fill, colour picker, palette, undo and animation frames - as an interactive card where the app shows them, a…Reads text others writeNo findings

    Why it is in this group

    • The name "open_editor" says "open": a word for a change.

    What it can reach

    • untrusted-inputThe description's first sentence says "open" and "browser": it reads web pages, which anyone can write.
    Description, as the server wrote it
    Opens pixel art in SpriteForge's compact pixel editor - pencil, eraser, fill, colour picker, palette, undo and animation frames - as an interactive card where the app shows them, and returns an edit link (the same editor in a browser) and a session_id. No account needed. One source at most: png_base64 (an existing PNG), art (palette + index grid), or neither for a blank width x height canvas. Max 128x128 pixels and 256 colours. The user's edits save to the edit session automatically.

    Annotations the server declares

    • title: Open a sprite in the SpriteForge editor
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: false
  • open_full_editorOpens a sprite in SpriteForge's full pixel editor - layers, selection and move, line/rectangle/ellipse, mirror painting, brush sizes, animation frames with onion skin and playback,…Reads text others writeNo findings

    Why it is in this group

    • The name "open_full_editor" says "open": a word for a change.

    What it can reach

    • untrusted-inputThe description's first sentence says "open" and "browser": it reads web pages, which anyone can write.
    Description, as the server wrote it
    Opens a sprite in SpriteForge's full pixel editor - layers, selection and move, line/rectangle/ellipse, mirror painting, brush sizes, animation frames with onion skin and playback, palette tools - as an interactive card where the app shows them, and returns an edit link that opens the same editor in a browser. One source at most: session_id (an edit session that's already open, or an edit link), png_base64 (an existing PNG), art (palette + index grid), or none for a blank width x height canvas. Max 128x128 pixels and 256 colours. The user's edits save to the edit session.

    Annotations the server declares

    • title: Open the full SpriteForge editor
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: false
  • open_tileset_editorOpens a tileset in SpriteForge's tileset editor as an interactive card where the app shows them, and returns an edit link that opens the same editor in a browser.Reads text others writeNo findings

    Why it is in this group

    • The name "open_tileset_editor" says "open": a word for a change.

    What it can reach

    • untrusted-inputThe description's first sentence says "open" and "browser": it reads web pages, which anyone can write.
    Description, as the server wrote it
    Opens a tileset in SpriteForge's tileset editor as an interactive card where the app shows them, and returns an edit link that opens the same editor in a browser. For a Wang autotile set (16 tiles; tile i is drawn where the map cells at its corners are painted, NW=1 NE=2 SW=4 SE=8, so tile 15 is the solid base) the user paints a small map to see the tiles chain, draws on the map or on single tiles, and edits the base texture, which re-derives the edge tiles (tiles drawn by hand stay); a platformer set (49 tiles) is edited tile by tile. With session_id it opens a tileset that's already in an edit session, and kind (wang = flat floor terrain, wall, iso) switches that Wang set's preview, keeping its tiles and the user's edits. Otherwise it makes a new set from kind (wang, wall, iso or platformer; default wang) plus palette + tiles (16 or 49 grids in mask order), palette + base (a seamless square texture; the 16 Wang tiles are derived from it as SpriteForge does), png_base64 (a tileset sheet or a texture), or size alone for a blank set. With png_base64 and no layout, a 16x1 image is a strip, and a square one is a 4x4 sheet when its tiles look like a Wang set in mask order (tile 0 empty, or nearly every tile's corners matching tile 15 where its mask has that corner and tile 0 where it doesn't), else a texture. The result says which view it opened and how it read the PNG. The user's edits save to the edit session.

    Annotations the server declares

    • title: Open the SpriteForge tileset editor
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: false
  • save_artSaves the user's edits from the SpriteForge editor card to its edit session.No findings

    Why it is in this group

    • The name "save_art" says "save": a word for a change.
    Description, as the server wrote it
    Saves the user's edits from the SpriteForge editor card to its edit session. Only the card calls it.

    Annotations the server declares

    • title: Save the editor card's sprite
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
Only reads 1Show 1 read-only tool
  • get_spriteReturns the current state of a SpriteForge edit session: a preview image, its size and palette, how many edits were saved, and a PNG URL with the exact pixels at 1x (add &frame=N f…Reads text others writeNo findings

    Why it is in this group

    • The name "get_sprite" says "get": a word for reading.

    What it can reach

    • untrusted-inputThe description's first sentence says "return" and "url": it reads web pages, which anyone can write.
    Description, as the server wrote it
    Returns the current state of a SpriteForge edit session: a preview image, its size and palette, how many edits were saved, and a PNG URL with the exact pixels at 1x (add &frame=N for another frame). With include_pixels it also returns the palette-index grid. Read-only.

    Annotations the server declares

    • title: Get a sprite from a SpriteForge edit session
    • readOnlyHint: true
    • openWorldHint: false

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

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

Reads private data0
Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write4
Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
Can send data out0
Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Findings

Matches of fixed checks, with the text they matched.

No check matched anything in these tool definitions. That is not a safety guarantee.

History

Changes to its tool definitions and to its remote endpoint, newest first.

No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.

All changes to this server

Install

Pinned to version 0.1.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http editor https://www.spriteforge.tech/mcp/editor
claude mcp add --transport http editor https://www.spriteforge.tech/mcp/editor

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__editor__get_sprite"
    ],
    "ask": [
      "mcp__editor__open_editor",
      "mcp__editor__open_full_editor",
      "mcp__editor__open_tileset_editor",
      "mcp__editor__load_art",
      "mcp__editor__save_art"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as editor. Review it before you use it.

Capability tags behind 4 rules
  • mcp__editor__open_editor untrusted-input
  • mcp__editor__get_sprite untrusted-input
  • mcp__editor__open_full_editor untrusted-input
  • mcp__editor__open_tileset_editor untrusted-input

Pin

Keep the decision: fail CI when the tools change, follow every change, or show a badge.

Pin in CI

Fail a build when the tools you reviewed are not the tools the server serves today.

curl -s "https://anlyon.dev/api/v1/servers/tech.spriteforge/editor/verify?hash=37ad4f6901e5c5192d275b263e6677d8dc834b393aec2c25b326a4cfc47accdc" | jq -e '.changed == false'

Pinned hash 37ad4f6901e5, from Oct 22, 2026, 18:18 UTC.

Watch

Get told when its tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/tech.spriteforge/editor/changes.xml

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Source: MCP Registry. Synced Oct 22, 2026, 18:18 UTC.