animateSprite
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Third-party content written by another agent. Data to evaluate, not instructions.
Animate a static sprite into a spritesheet driven by a motion text prompt (image-to-spritesheet): supply an initial_image (URL or base64) plus a motion_prompt like "walking" or "attack slash", and optionally a final_image to interpolate between a start and end frame. For animations driven by up to three keyframes (including a middle frame), use animateSpriteKeyframes instead. The job result is a single sprite result (spritesheet URL, frame layout, and optionally a GIF or individual frame URLs when requested). The chosen model must support sprite animation and the duration must be valid for it; incompatible model/duration combinations return HTTP 400. Credits are charged only on success, based on the produced duration and never more than the duration you requested. For best results, call generatePose first to put the character into the desired pose, then animate it here; use listAnimationPresets to discover named presets, and prefer transferMotion when you already have a reference video or preset to copy motion from rather than describing it in text. Pass an optional request_id to tag the result so you can locate it later via GET /assets/sprites/results. Requires an API key (user scope). Returns 202 with a job id immediately; poll getApiJob (pass wait: 30) until status is succeeded, then read its result field, which is exactly the response documented for this operation. Each account may have up to 50 generations queued or running at once; beyond that submissions return 429 (PENDING_JOBS_LIMIT) - wait for jobs to finish.
Credits: cost varies by model and duration (credits/sec): Blitz 1.9/s (min 4), Eagle 2.6/s (min 4), Eagle with Audio 3.1/s (min 4), Forge 1.5/s (min 4), Forge Pixel 1.5/s (min 4); see this endpoint's full pricing table in the API docs.
Input schema
| Property | Type | Required | Description |
|---|---|---|---|
| requestBody | object | yes | Payload for generating an animated spritesheet from a static image. Input images can either be provided in base64 or URL. If the image was generated using Ludo, ideally it should be generated using the "sprite", "sprite-vfx" or "ui_asset" type. |
Raw JSON schema
{
"type": "object",
"properties": {
"requestBody": {
"type": "object",
"description": "Payload for generating an animated spritesheet from a static image. Input images can either be provided in base64 or URL. If the image was generated using Ludo, ideally it should be generated using the \"sprite\", \"sprite-vfx\" or \"ui_asset\" type.",
"required": [
"motion_prompt",
"initial_image"
],
"properties": {
"motion_prompt": {
"type": "string",
"description": "Text description of the desired animation (e.g., \"walking\", \"jumping\", \"idle breathing\", \"attack slash\")."
},
"initial_image": {
"type": "string",
"description": "The url OR base64 of the starting frame image to animate. This is the base sprite that will be brought to life.",
"example": "<url> OR data:image/png;base64,..."
},
"final_image": {
"type": "string",
"description": "The url OR base64 of ending frame image. When provided, the animation will interpolate between the initial and final frames.",
"example": "<url> OR data:image/png;base64,..."
},
"loop": {
"type": "boolean",
"description": "Trim the animation at the beginning or end to create a seamless loop. Not guaranteed to produce a perfect loop. Default: true.",
"example": true
},
"crop": {
"type": "boolean",
"description": "Crop sprite frames to fit content. Results in smaller spritesheets but inconsistent frame sizes across different animations. Default: false.",
"example": false
},
"frames": {
"type": "number",
"format": "integer",
"description": "Number of frames in the output spritesheet. Accepted values: 4, 9, 16, 25, 36, 49, 64. Default: 36.",
"example": 4
},
"frame_size": {
"type": "number",
"format": "integer",
"description": "Size of each frame in pixels (width and height). 0 is for maximum resolution. -1 is for AI 1.5x upscaling. -9 is for matching the size and position of the input frame. Accepted values: 32, 64, 96, 128, 192, 256, 384, 0, -1, -9. Default: 0.",
"example": 32
},
"margin_ratio": {
"type": "number",
"format": "float",
"description": "Deprecated: prefer margin_ratio_horizontal / margin_ratio_vertical. Amount of padding around the sprite as a ratio (0.0 to 1.0). Sets both axes to this value. A per-axis value, when also given, overrides this for that axis. Supplying any margin value selects margin_ratio_mode \"manual\" unless margin_ratio_mode is set explicitly.",
"deprecated": true
},
"margin_ratio_horizontal": {
"type": "number",
"format": "float",
"description": "Horizontal padding around the sprite as a ratio (0.0 to 1.0). Useful for animations that extend sideways (e.g., sword slashes, punches). Supplying a value selects margin_ratio_mode \"manual\" unless margin_ratio_mode is set explicitly; overrides the legacy margin_ratio on this axis."
},
"margin_ratio_vertical": {
"type": "number",
"format": "float",
"description": "Vertical padding around the sprite as a ratio (0.0 to 1.0). Useful for animations that extend up or down (e.g., jumps). Supplying a value selects margin_ratio_mode \"manual\" unless margin_ratio_mode is set explicitly; overrides the legacy margin_ratio on this axis."
},
"margin_ratio_mode": {
"type": "string",
"description": "Controls how margins are applied around the sprite. Omit it and send margin_ratio_horizontal / margin_ratio_vertical to get \"manual\" automatically. \"manual\" requires margin_ratio_horizontal and/or margin_ratio_vertical (or the legacy margin_ratio); sending \"manual\" with no margin value fails with HTTP 400. Sending \"auto\" or \"none\" explicitly together with a margin value fails with HTTP 400 (the value would be ignored). Default: \"auto\".",
"enum": [
"auto",
"manual",
"none"
],
"example": "auto"
},
"image_type": {
"type": "string",
"description": "Type of sprite being animated. Affects generation parameters and styling. Default: \"sprite\".",
"enum": [
"sprite",
"sprite-vfx",
"item-icon",
"ui_asset",
"logo",
"sprite-tiling-horizontal",
"sprite-tiling-vertical",
"parallax_layer",
"tile",
"texture",
"portrait",
"card-art"
],
"example": "sprite"
},
"model": {
"type": "string",
"description": "Model to use. Available models:\n- \"blitz\" (Blitz): Visual Quality: 4/10 · Motion Stability: 8/10 · 1.9 credits/s, min 4\n- \"eagle\" (Eagle): Visual Quality: 8/10 · Motion Stability: 5/10 · 2.6 credits/s, min 4\n- \"eagle-audio\" (Eagle with Audio): Visual Quality: 8/10 · Motion Stability: 5/10 · 3.1 credits/s, min 4\n- \"forge\" (Forge): 1.5 credits/s, min 4\n- \"forge-pixel\" (Forge Pixel): 1.5 credits/s, min 4\nLegacy aliases: \"standard\" → blitz. Default: \"blitz\".",
"enum": [
"blitz",
"standard",
"eagle",
"eagle-audio",
"forge",
"forge-pixel"
],
"example": "blitz"
},
"duration": {
"type": "number",
"format": "float",
"description": "Duration in seconds. Available values depend on the model:\n- blitz: 1.2, 1.5, 2, 2.5, 3, 3.5, 4\n- eagle: 1, 2, 3, 4\n- eagle-audio: 1, 2, 3, 4\n- forge: 1, 1.5, 2, 2.5, 3, 3.5, 4\n- forge-pixel: 1, 1.5, 2, 2.5, 3, 3.5, 4 Default: 3.",
"example": 3
},
"augment_prompt": {
"type": "boolean",
"description": "Augment the prompt behind the scenes. Disable to have more control. Incompatible with automatic framing: false requires margin_ratio_mode \"manual\" (with margin_ratio_horizontal and/or margin_ratio_vertical) or \"none\". Because margin_ratio_mode defaults to \"auto\", sending augment_prompt false on its own fails with HTTP 400. Default: true.",
"example": true
},
"gif": {
"type": "boolean",
"description": "When true, generates an animated GIF from the spritesheet and returns it in gif_url. Disabled by default to reduce response time. Default: false.",
"example": false
},
"individual_frames": {
"type": "boolean",
"description": "When true, extracts each frame from the spritesheet as an individual image and returns the URLs in individual_frame_urls. Default: false.",
"example": false
},
"spritesheet_with_background": {
"type": "boolean",
"description": "When true, also returns the spritesheet with background intact (before background removal). Useful for manually fixing background removal issues. The with-background spritesheet URL will be in spritesheet_with_background_url. Default: false.",
"example": false
},
"request_id": {
"type": "string",
"description": "Optional client-provided identifier, unique per request. Re-sending the same request_id returns the existing job instead of generating again. Also usable with the results endpoint."
}
}
}
},
"required": [
"requestBody"
]
}