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SpriteForge Editor

by tech.spriteforge
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Server Details

Free pixel art and tileset editor, no account needed. Opens a sprite, an animation or a 16-tile Wang autotile set in an editor inside the chat, lets you edit it by hand (layers, frames with onion skin, tiling preview), and returns the edited PNG.

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Status
Healthy
Last Tested
Transport
Streamable HTTP · MCP 2025-11-25
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Available Tools

6 tools
get_spriteGet a sprite from a SpriteForge edit session
Read-only
Inspect

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.

ParametersJSON Schema
NameRequiredDescriptionDefault
session_idYesAn edit session's id (the s= value of an edit link), or the edit link itself.
include_pixelsNoAlso return the palette and index grid (default false).
load_artLoad an edit session into the editor card
Read-only
Inspect

Loads an edit session's sprite into the SpriteForge editor card. Only the card calls it.

ParametersJSON Schema
NameRequiredDescriptionDefault
session_idYes
open_editorOpen a sprite in the SpriteForge editorInspect

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.

ParametersJSON Schema
NameRequiredDescriptionDefault
artNoPixel art in SpriteForge's format: palette = hex colours, grid = rows of palette indexes (-1 = transparent). Optional frames for an animation, each { grid } on the same palette.
nameNoSprite name, used as the download filename (letters, digits, _ and -).
widthNoBlank canvas width in pixels (default 32).
heightNoBlank canvas height in pixels (default 32).
paletteNoStarting palette for a blank canvas, as hex colours.
png_base64NoA PNG file, base64-encoded (a data: URL prefix is fine). Pixels under 50% alpha become transparent.
open_full_editorOpen the full SpriteForge editorInspect

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.

ParametersJSON Schema
NameRequiredDescriptionDefault
artNoPixel art in SpriteForge's format: palette = hex colours, grid = rows of palette indexes (-1 = transparent). Optional frames for an animation, each { grid } on the same palette.
nameNoSprite name, used as the download filename (letters, digits, _ and -).
widthNoBlank canvas width in pixels (default 32).
heightNoBlank canvas height in pixels (default 32).
paletteNoStarting palette for a blank canvas, as hex colours.
png_base64NoA PNG file, base64-encoded (a data: URL prefix is fine). Pixels under 50% alpha become transparent.
session_idNoAn edit session that's already open, or an edit link containing ?s=<id>.
open_tileset_editorOpen the SpriteForge tileset editorInspect

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.

ParametersJSON Schema
NameRequiredDescriptionDefault
baseNoA square seamless texture to derive a Wang set's 16 tiles from.
kindNowang (flat floor terrain), wall (Wang walls), iso (isometric Wang) or platformer. For a new set, default wang. With session_id, wang, wall or iso switches that Wang set's preview, keeping its tiles; a Wang set can't become a platformer set or the other way round.
nameNoThe set's name.
sizeNoTile size for a blank set (default 32).
tilesNoThe set's tiles in mask order (16 for Wang kinds, 49 for platformer), palette indexes, -1 transparent.
layoutNoHow to read png_base64: sheet (4x4 Wang sheet, or a platformer set's 7x7), strip (16x1) or texture (a square base texture the 16 Wang tiles are derived from). Default: guessed from the image (see the tool description).
paletteNoHex colours for tiles or base.
png_base64NoA tileset PNG (a Wang set's 4x4 sheet or 16x1 strip, a platformer set's 7x7 sheet) or a square texture, base64.
session_idNoAn existing tileset edit session, or an edit link containing ?s=<id>. Give kind with it to change a Wang set's preview; the other fields are for a new set.
save_artSave the editor card's sprite
Idempotent
Inspect

Saves the user's edits from the SpriteForge editor card to its edit session. Only the card calls it.

ParametersJSON Schema
NameRequiredDescriptionDefault
artYesPixel art in SpriteForge's format: palette = hex colours, grid = rows of palette indexes (-1 = transparent). Optional frames for an animation, each { grid } on the same palette.
session_idYes

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections.

  1. 6 tool updates
    • First observedget_sprite
    • First observedload_art
    • First observedopen_editor
    • First observedopen_full_editor
    • First observedopen_tileset_editor
    • First observedsave_art

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