Ludo AI Game Assets MCP Server

Generate text-driven skeletal animations for an already-rigged 3D model. Pass the rigged GLB in `model` (URL or base64; the 3D asset file, not an AI model name) and a motion `prompt` (e.g. "walking", "swinging its axe"). The model must already have a skeleton - rig it first with rigModel if not. The job result is num_variants candidate animations (default 4), each a standalone animation-only GLB (skeleton + one clip, no mesh) in `glb_url` plus an mp4 `preview_url`, so you can pick the best one and fuse it with your model in a game engine or three.js. mode selects the representation - rot_trans (default, rotation plus translation per bone, most faithful) or rot_only (rotation only, easier to retarget onto another skeleton in an engine). Animation quality is hit-or-miss, which is why multiple candidates are returned. Credits are held once per call regardless of variant count and refunded if the job fails or is cancelled. Async generation job: returns `{id, status}` - poll `getApiJob` (job and credit contract: see the server instructions). Credits: This endpoint consumes 0.2 credits per call.

Apply a curated animation preset to an already-rigged 3D model (retargeting). Pass the rigged GLB in `model` (URL or base64; the 3D asset file, not an AI model name) and a `preset_id` from the animation presets list (from listAnimationPresets) - only presets that expose a `clip_url` can be applied to a 3D model. The model must have a humanoid-template rig (rig it with rig_type humanoid_template or humanoid_template_hands). The job result is one retargeted animation - a standalone animation-only GLB in `glb_url` plus an mp4 `preview_url` - in the same `animations` envelope as the animate endpoint. crop_loop trims the clip to its seamlessly-looping span (omit to follow the preset's own loop flag); in_place removes net travel so the character moves on the spot, as game-engine locomotion expects (omit to keep the preset's own travel). Credits are held when the job is accepted and refunded if it fails or is cancelled. Async generation job: returns `{id, status}` - poll `getApiJob` (job and credit contract: see the server instructions). Credits: This endpoint consumes 0.2 credits per call.

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` (the sheet image), `video_url` (an mp4 of the animation - pass it as `video` to transferMotion or as `spritesheet_video_url` to createSpriteAudio; editSpritesheet takes `spritesheet_url`), `num_frames`/`num_cols`/`num_rows` (the grid layout), and, when requested, `gif_url`, `individual_frame_urls` and `spritesheet_with_background_url`. The hydra model also returns `audio_b64`, a sound effect for the animation - there is no need to call createSpriteAudio afterwards; forge and forge-pixel produce no audio. The chosen model must support sprite animation and the duration must be valid for it; incompatible model/duration combinations return HTTP 400. Credits are held when the job is accepted; the final charge is max(rate × produced seconds, the model's minimum charge), never more than for the duration you requested, and the difference (or everything, if the job fails or is cancelled) is refunded. Choosing a tool: animateSprite (this one) when you can describe the motion in text; transferMotion when you want an exact motion copied from a reference video or one of the named presets from listAnimationPresets (e.g. a standard walk or attack cycle); generatePose first when the source image is not yet in the pose the animation should start from. Omit `model` to run on hydra (the default) - see the `model` field for the per-model rates and the 4-credit minimum charge on forge/forge-pixel. Pass an optional request_id to tag the result so you can locate it later via listGenerations (type spritesheet). Async generation job: returns `{id, status}` - poll `getApiJob` (job and credit contract: see the server instructions). Credits: credits/s × seconds, per model: Hydra 3/s (shortest duration 3s, so 9 credits minimum), Forge 1.5/s (min charge 4 credits), Forge Pixel 1.5/s (min charge 4 credits), Blitz 1.9/s (min charge 4 credits) [LEGACY], Eagle 2.6/s (min charge 4 credits) [LEGACY], Eagle with Audio 3.1/s (min charge 4 credits) [LEGACY]; [LEGACY] models are scheduled for removal - do not use them for new work; see this endpoint's full pricing table in the API docs.

Animate a sprite through up to three fixed keyframes - initial_image, middle_image and final_image (each a URL or base64) - producing a spritesheet that interpolates through the provided frames in order. At least one of initial_image or middle_image is required (a final_image alone has nothing to anchor the animation); any keyframe may be omitted. The motion_prompt is optional here - when omitted, the motion is derived purely from the keyframes. Runs on hydra (default; also returns `audio_b64`), forge, or forge-pixel for pixel-art sprites - the models that support a middle keyframe; any other model returns HTTP 400. For just a start and end frame, animateSprite with `final_image` does the same job. The job result is the same sprite result as animateSprite (`spritesheet_url`, `video_url`, grid fields, optional GIF and frame URLs, `audio_b64` on hydra). Credits are held when the job is accepted; the final charge is max(rate × produced seconds, the model's minimum charge), never more than for the duration you requested, and the difference (or everything, if the job fails or is cancelled) is refunded. Use animateSprite instead for the classic single-image + text-prompt animation. Pass an optional request_id to tag the result so you can locate it later via listGenerations (type spritesheet). Async generation job: returns `{id, status}` - poll `getApiJob` (job and credit contract: see the server instructions). Credits: credits/s × seconds, per model: Hydra 3/s (shortest duration 3s, so 9 credits minimum), Forge 1.5/s (min charge 4 credits), Forge Pixel 1.5/s (min charge 4 credits); see this endpoint's full pricing table in the API docs.

Cancel a queued job you started through the API or MCP; the credits held for it are refunded. Jobs that are already running cannot be canceled (409). Returns the canceled job. This is free (no credits).

Convert a single source image into a textured 3D model (image-to-3D). The job result is a downloadable GLB model_url plus an array of snapshot image URLs rendered from different angles (handy for previews). Accepts optional mesh controls: target_num_faces (max triangle count, 1000-200000, default 50000), texture_size (1024 or 2048, default 2048), and texture_type ("pbr", "simple", or "none", default "pbr"). Credits are held when the job is accepted and refunded if it fails or is cancelled. Pass an optional request_id to tag the result so you can locate it later via listGenerations (type 3d). Async generation job: returns `{id, status}` - poll `getApiJob` (job and credit contract: see the server instructions). Credits: This endpoint consumes 3 credits per call.

Produce a looping background ambiance soundscape from a text description, such as "windy forest at dusk" or "busy tavern interior". The job result is a single audio result containing a URL. The description field is required and duration is capped at 10 seconds (0 means auto-pick based on the description). Credits are held when the job is accepted and refunded if it fails or is cancelled. Use this for continuous, atmospheric background loops; use createSoundEffect for short discrete sound effects, createMusic for musical pieces, and createAudioTransform to remix an existing audio sample. Pass an optional request_id to tag the result so you can locate it later via listGenerations (type audio). Async generation job: returns `{id, status}` - poll `getApiJob` (job and credit contract: see the server instructions). Credits: This endpoint consumes 2 credits per call.

Remix an existing audio sample (a sound effect, ambiance, or music clip) into a variation guided by a text prompt, for example turning a track into an 80s synthwave or metal version. Both the sample and the prompt are required; the sample is uploaded as a URL or base64 audio and must be at most 15MB or the call returns HTTP 400, and duration must be one of the allowed values (0 means match the source, otherwise multiples of 10 up to 180 seconds). The job result is a single audio result containing a URL. The optional modification_strength (0 to 1, default 0.6) controls how far the result departs from the original. Credits are held when the job is accepted and refunded if it fails or is cancelled. Use this to transform existing audio you already have; use createSoundEffect, createAmbiance, or createMusic to generate audio from scratch. Pass an optional request_id to tag the result so you can locate it later via listGenerations (type audio). Async generation job: returns `{id, status}` - poll `getApiJob` (job and credit contract: see the server instructions). Credits: This endpoint consumes 3 credits per call.

Generate game-art images from a text prompt alone, selecting an image_type (e.g. sprite) and optionally art_style, perspective, and aspect_ratio. The job result is an array of image results, each with a url; request n (1-8) to control how many variations come back. Because it generates purely from text it takes no source image, so there is no upload size limit to trip. Credits are held when the job is accepted and refunded if it fails or is cancelled; the charge scales with the number of images produced. Use createImage to make new images from scratch; use generateWithStyle to match a reference image's art style, editImage to modify an existing image, and removeBackground to cut out a subject. Pass an optional request_id to tag the results so you can retrieve them later via listGenerations (type image). Async generation job: returns `{id, status}` - poll `getApiJob` (job and credit contract: see the server instructions). Credits: This endpoint consumes 0.5 credits per result.

Produce a piece of music from a text description, such as "epic orchestral battle theme" or "calm piano melody", with optional lyrics. The job result is a single audio result containing a URL. The description field is required; duration must be one of the allowed values (0 means auto, otherwise multiples of 10 up to 180 seconds) and out-of-range values return HTTP 400. Credits are held when the job is accepted and refunded if it fails or is cancelled. Use this for songs and musical scores; use createSoundEffect for short sound effects, createAmbiance for looping background soundscapes, and createAudioTransform to remix an existing audio sample. Pass an optional request_id to tag the result so you can locate it later via listGenerations (type audio). Async generation job: returns `{id, status}` - poll `getApiJob` (job and credit contract: see the server instructions). Credits: This endpoint consumes 3 credits per call.

Produce a short sound effect (SFX) from a text description, such as "laser gun firing" or "footsteps on gravel". The job result is a single audio result containing a URL. The description field is required, duration is capped at 10 seconds (0 means auto-pick based on the description), and you may set loop to true for a seamlessly looping effect. Credits are held when the job is accepted and refunded if it fails or is cancelled. Use this for short, discrete sounds; use createAmbiance for a continuous looping background soundscape, createMusic for musical pieces, and createAudioTransform to remix an existing audio sample. Pass an optional request_id to tag the result so you can locate it later via listGenerations (type audio). Async generation job: returns `{id, status}` - poll `getApiJob` (job and credit contract: see the server instructions). Credits: This endpoint consumes 2 credits per call.

Convert text to speech by cloning the voice from an audio sample you provide (voice-cloning text-to-speech). Both text and sample are required; the text is limited to 1000 characters and the sample is supplied as a URL or base64 audio that must be at most 15MB, with violations returning HTTP 400. The job result is a single audio result containing a URL. Credits are held when the job is accepted and refunded if it fails or is cancelled. Use this when you have a reference voice sample to clone; use createSpeechPreset to speak with a built-in named preset voice instead, and createVoice to design a brand-new voice from a text description rather than cloning one. Pass an optional request_id to tag the result so you can locate it later via listGenerations (type audio). Async generation job: returns `{id, status}` - poll `getApiJob` (job and credit contract: see the server instructions). Credits: This endpoint consumes 1 credits per call.

Convert text to speech using a named built-in preset voice, with optional emotion and language settings. Both text and voice_preset_id are required and the text is limited to 1000 characters; invalid input returns HTTP 400. The job result is a single audio result containing a URL. Credits are held when the job is accepted and refunded if it fails or is cancelled. Use this when you want a ready-made catalog voice and do not need to supply your own sample; use createSpeech to clone a voice from an audio sample instead, and createVoice to design a new voice from a text description. Pass an optional request_id to tag the result so you can locate it later via listGenerations (type audio). Async generation job: returns `{id, status}` - poll `getApiJob` (job and credit contract: see the server instructions). Credits: This endpoint consumes 1 credits per call.

Generate a sound effect for a previously generated spritesheet animation. Pass, as `spritesheet_video_url`, the `video_url` you received from `animateSprite`, `animateSpriteKeyframes`, `transferMotion`, or `editSpritesheet` - it must belong to a spritesheet you generated within the last 7 days; arbitrary external videos are not accepted. Spritesheets generated with the hydra model already come with `audio_b64`, so only call this for forge / forge-pixel output or to replace hydra's sound. Optionally add a `prompt` describing the sound you want. The job result is the URL of the generated audio file only; no video is returned. The audio is also attached to the spritesheet, so it appears as `audio_b64` in listGenerations (type spritesheet), where the spritesheet keeps the `request_id` it was generated with. Pass an optional `request_id` to make this call idempotent and to find its job again; it must not be one you already used for another generation. Async generation job: returns `{id, status}` - poll `getApiJob` (job and credit contract: see the server instructions). Credits: This endpoint consumes 3 credits per call.

Generate a short video clip from a source image and a motion text prompt (image-to-video); a source `image` is required - to make a video from text alone, first createImage and animate that, or use createVideoFromReferences with reference images. Griffin (default, 480p) and Griffin HD (720p) both generate a soundtrack; no separate audio step is needed. The job result is the video URL and its actual duration in seconds. Optionally pass `final_image` to interpolate between a start and end frame. The chosen `model` and `duration` must be compatible (incompatible combinations return HTTP 400); see the `model` and `duration` fields for the values each model accepts. Credits are held when the job is accepted; the final charge is max(rate × produced seconds, the model's minimum charge), never more than for the duration you requested, and the difference (or everything, if the job fails or is cancelled) is refunded. Pass an optional `request_id` to tag the result so you can locate it later via listGenerations (type video). Related tools: use `createImage` for static images, `animateSprite` for sprite-sheet animation, and listGenerations (type video) to list videos you generated earlier. Async generation job: returns `{id, status}` - poll `getApiJob` (job and credit contract: see the server instructions). Credits: credits/s × seconds, per model: Griffin 1.5/s (shortest duration 5s, so 7.5 credits minimum), Griffin HD 2/s (shortest duration 5s, so 10 credits minimum), Blitz 1/s (shortest duration 2s, so 2 credits minimum) [LEGACY], Eagle 1.3/s [LEGACY], Eagle with Audio 1.8/s [LEGACY]; [LEGACY] models are scheduled for removal - do not use them for new work; see this endpoint's full pricing table in the API docs.

Generate a video from 1-5 reference images and a text prompt (references-to-video). Unlike createVideo, which animates a single source image, this composes a new scene that borrows characters, objects, and style from the reference images. Each image can be a URL or base64. Griffin (default, 480p) and Griffin HD (720p) generate a soundtrack; note the per-second rate here is higher than createVideo's for the same model. The job result is the video URL and its actual duration in seconds. Choose the output shape with `aspect_ratio` ("default" lets the model decide). The chosen `model` and `duration` must be compatible (incompatible combinations return HTTP 400). Credits are held when the job is accepted; the final charge is max(rate × produced seconds, the model's minimum charge), never more than for the duration you requested, and the difference (or everything, if the job fails or is cancelled) is refunded. Pass an optional `request_id` to tag the result so you can locate it later via listGenerations (type video). Related tools: `createVideo` for image-to-video, `editVideo` to modify a generated video. Async generation job: returns `{id, status}` - poll `getApiJob` (job and credit contract: see the server instructions). Credits: credits/s × seconds, per model: Griffin 2.5/s (shortest duration 5s, so 12.5 credits minimum), Griffin HD 4/s (shortest duration 5s, so 20 credits minimum), Eagle 1.5/s [LEGACY], Eagle with Audio 2/s [LEGACY]; [LEGACY] models are scheduled for removal - do not use them for new work; see this endpoint's full pricing table in the API docs.

Design a new voice from a character description (such as "deep-voiced warrior" or "cheerful young girl") and have it speak a short line of text, returning a sample of that newly created voice. Both voice_description and text are required, the spoken text is limited to 200 characters or the call returns HTTP 400, and type selects "human" or "non-human" voices. The job result is a single audio result containing a URL. Credits are held when the job is accepted and refunded if it fails or is cancelled. Use this to invent and audition a voice from a description; use createSpeech for text-to-speech that clones a specific voice from an audio sample, and createSpeechPreset for text-to-speech using a named preset voice. Pass an optional request_id to tag the result so you can locate it later via listGenerations (type audio). Async generation job: returns `{id, status}` - poll `getApiJob` (job and credit contract: see the server instructions). Credits: This endpoint consumes 1 credits per call.

Modify an existing image according to text instructions: supply a source image (URL or base64) and a prompt describing the changes (e.g. "add clouds", "warmer color scheme"), with an optional reference_image for extra style or content guidance. The job result is an array of image results, each with a url; request n (1-4) to control the number of edited variations. Provided images are uploaded and validated, and any image larger than 15MB is rejected with HTTP 400. Credits are held when the job is accepted and refunded if it fails or is cancelled; the charge scales with the number of images produced. Use editImage to transform a specific existing image; use createImage to generate from text alone, generateWithStyle to borrow a reference's art style, and removeBackground for the dedicated background-removal case. Pass an optional request_id to tag the results so you can retrieve them later via listGenerations (type image). Async generation job: returns `{id, status}` - poll `getApiJob` (job and credit contract: see the server instructions). Credits: This endpoint consumes 0.5 credits per result.

Edit a previously generated spritesheet: re-prompt its underlying animation (edit_mode "prompt"), extend the frame beyond its borders ("outpaint"), or repair a bad loop ("fix_loop"). Pass the `spritesheet_url` you received from `animateSprite`, `animateSpriteKeyframes`, `transferMotion`, or an earlier edit - it must be a spritesheet you generated within the last 7 days; arbitrary external images are not accepted. Omit `duration`, `frames`, `frame_size`, `crop` and `model` to keep the source spritesheet's values. A `prompt` is required for edit_mode "prompt", optional for "outpaint", and not accepted for "fix_loop"; optionally add up to 5 reference `images` (URL or base64) to guide the edit. The job result is the same result shape as animateSprite (spritesheet URL, frame layout, optional GIF or individual frames). Credits are held when the job is accepted; the final charge is max(rate × produced seconds, the model's minimum charge), never more than for the duration you requested, and the difference (or everything, if the job fails or is cancelled) is refunded. Prompt edits are priced per model (credits/second × duration); "outpaint" and "fix_loop" run a lighter pipeline in which `model` is ignored and are billed at a flat 1 credit per second of the output duration (the source spritesheet's duration unless you pass one). Outpaint decides the extra margin itself - there is no amount parameter. The result carries the same fields as animateSprite (`spritesheet_url`, `video_url`, grid fields); audio is generated only by prompt edits on hydra, so a fix on a hydra sheet comes back without `audio_b64`. Pass an optional `request_id` to tag the result for later retrieval via listGenerations (type spritesheet). Async generation job: returns `{id, status}` - poll `getApiJob` (job and credit contract: see the server instructions). Credits: edit_mode "fix_loop" / "outpaint": flat 1 credit per second of output, no minimum, model ignored; edit_mode "prompt": per model as listed - credits/s × seconds, per model: Hydra 3/s (shortest duration 3s, so 9 credits minimum), Forge 2/s (min charge 4 credits), Forge Pixel 2/s (min charge 4 credits); see this endpoint's full pricing table in the API docs.

Edit a previously generated video with a text prompt and optional reference images (video-to-video); runs on griffin-hd (720p, with soundtrack) and the output keeps the source video's duration unless you pass one. Pass the video `url` you received from `createVideo`, `createVideoFromReferences`, or an earlier edit - it must be a video you generated within the last 7 days; arbitrary external videos are not accepted. Optionally add up to 5 reference `images` (URL or base64) to guide the edit. The job result is the new video URL and its actual duration in seconds. Credits are held when the job is accepted; the final charge is max(rate × produced seconds, the model's minimum charge), never more than for the duration you requested, and the difference (or everything, if the job fails or is cancelled) is refunded. Pass an optional `request_id` to tag the result so you can locate it later via listGenerations (type video). Related tools: `createVideo` to generate the source clip, `createVideoFromReferences` for reference-driven generation. Async generation job: returns `{id, status}` - poll `getApiJob` (job and credit contract: see the server instructions). Credits: credits/s × seconds, per model: Griffin HD 2/s (shortest duration 5s, so 10 credits minimum), Eagle 2/s [LEGACY]; [LEGACY] models are scheduled for removal - do not use them for new work; see this endpoint's full pricing table in the API docs.

Re-pose an existing sprite into a new target pose while preserving the character, taking a source image (URL or base64), a pose name (or "Other" with a free-text description), and an optional n (1-4) for how many variations to produce. Only works with sprite image types (not icons, screenshots, etc.). The job result is an array of pose results, each containing the generated image url, the pose and description used, and a suggested motion_prompt tuned for that pose. Credits are held when the job is accepted and refunded if it fails or is cancelled; the charge scales with the number of images generated. This is typically the first step before animating: call generatePose to set the character's pose, then feed the result (and its suggested motion_prompt) into animateSprite for the best animation quality; use rotateSprite instead when you want to change the camera angle rather than the pose. Pass an optional request_id to tag the results so you can locate them later via listGenerations (type spritesheet). Async generation job: returns `{id, status}` - poll `getApiJob` (job and credit contract: see the server instructions). Credits: This endpoint consumes 0.5 credits per result.

Generate new images that match the visual style of a reference image: supply a style_image (URL or base64) plus a text prompt describing what to create and an optional image_type (defaults to sprite). The job result is an array of image results, each with a url; request n (1-4) to control the number of variations. The style_image is uploaded and validated, and an image larger than 15MB is rejected with HTTP 400. Credits are held when the job is accepted and refunded if it fails or is cancelled; the charge scales with the number of images produced. Use this instead of createImage when style consistency with an existing asset matters; use editImage to alter the content of a specific image rather than borrow its style, and removeBackground to isolate a subject. Pass an optional request_id to tag the results so you can retrieve them later via listGenerations (type image). Async generation job: returns `{id, status}` - poll `getApiJob` (job and credit contract: see the server instructions). Credits: This endpoint consumes 0.5 credits per result.

Poll the status of a generation job started by any tool. Every generation tool returns `{id, status}`; call getApiJob with that id until status is `succeeded` (then read `result`, shaped exactly like the tool's documented output) or `failed` (read `error`). Poll every few seconds, or pass `wait: 30` to long-poll - the call is held up to 30 seconds (max 60) and returns as soon as the job finishes.

Browse or read Ludo's own documentation in full - how to choose a sprite animation mode, when to use Generate Before / Generate After, how margins behave, which model suits a job, and each generator's known limitations. To answer a specific question, call searchDocs first: it returns just the sections that match. Use getDocs to see what documentation exists, or to read a whole document or named sections. This is the same documentation the Ludo web app shows its users, so it occasionally describes buttons rather than parameters; the substance applies to the API and MCP surfaces just the same. To browse, call it with NO parameters to get a table of contents - every document with its id, label and section titles, and no bodies - then call it again with `doc` (and optionally `sections`) to read only what you need. Fetching a whole document can return tens of thousands of characters, so prefer naming the sections, using titles copied from the table of contents. Section titles match ignoring case, spacing and punctuation: when only some requested titles exist you receive those sections plus `unmatched_sections` and `available_sections`, and when none exist (or `doc` is unknown) the call returns 400 listing the valid values so you can retry once. This is a free discovery endpoint: it does not charge credits and does not queue a job.

List the available animation presets along with their perspectives and the eight supported compass directions (N, NE, E, SE, S, SW, W, NW). Synchronous GET with no request body: it returns an animations array (each with id, name, category, description, duration, preview_url, and - when the preset can be retargeted onto a rigged 3D model - clip_url), a deduplicated perspectives array, and the directions list. This is a free discovery endpoint and does not charge credits. Use it to obtain the preset_id, perspective, and direction values that transferMotion needs, and to find motion preset names you can reference when animating; pair it with transferMotion (to apply a preset onto a sprite), animateSprite (text-prompt animation), or animate3DModelPreset (apply a clip_url-backed preset to a rigged 3D model).

List the generation jobs you started through the API or MCP, most recent first. Web-app jobs are not included. This is a free read-only lookup (no credits, no generation). Filter with a comma-separated status list; limit defaults to 50 and is capped at 100.

List your generation history across the API and the web app - filter by type, source (api|web|all), text search, and date range. Returns {items, page, page_size, has_more}; keep paging while has_more is true. API-originated results expire after 7 days - download anything you want to retain. For an in-flight job's status use getApiJob instead.

Remove the background from a single image, returning the subject isolated on a transparent background. Supply the source image (URL or base64); optionally set crop to trim the result to the content, and creative_edit (default true) for higher-quality output that may not match the input pixel-for-pixel - set it false when the subject must stay pixel-identical, e.g. an existing sprite you will animate. The job result is a single image result with a url (not an array). The image is uploaded and validated, and an image larger than 15MB is rejected with HTTP 400. Credits are held when the job is accepted and refunded if it fails or is cancelled. Use removeBackground for this dedicated cutout task; editImage can also remove backgrounds via a prompt but is better for broader edits, while createImage and generateWithStyle produce new images rather than process an existing one. Pass an optional request_id to tag the result so you can retrieve it later via listGenerations (type image). Async generation job: returns `{id, status}` - poll `getApiJob` (job and credit contract: see the server instructions). Credits: This endpoint consumes 0.5 credits per result.

Rig a 3D model: generate a skeleton and skin weights for an existing GLB so it can be animated. Accepts a URL or base64-encoded GLB in `model` (here `model` is the 3D asset file, not an AI model name - there is no model choice on the 3D tools). The job result is a downloadable `model_url` for the rigged GLB. rig_type selects the skeleton prior - general (default, any asset), humanoid (anime-style characters), game (classic game-character rigs), or the pinned humanoid templates for two-armed, two-legged characters: humanoid_template (standard 22-joint skeleton with named joints, required for animating from the preset library) and humanoid_template_hands (52 joints, five fingers per hand). joint_naming relabels the identified joints to a convention - smpl (default), mixamo, humanik, unreal, godot, rigify, or vroid - without changing the skeleton. Credits are held when the job is accepted and refunded if it fails or is cancelled. Rigging is non-destructive to geometry but replaces any prior skeleton, so animations made against an old rig no longer apply. Async generation job: returns `{id, status}` - poll `getApiJob` (job and credit contract: see the server instructions). Credits: This endpoint consumes 1 credits per call.

Re-render an existing sprite from a different camera viewpoint while keeping the same character and pose, taking a source image (URL or base64), a required camera_rotation azimuth (one of 0, 45, 90, 135, 180, -135, -90, -45 degrees), an optional camera_elevation (0, 30, or 60 degrees; omit to keep the current elevation), and an optional n (1-4) for the number of variations. Only works with sprite image types (not icons, screenshots, etc.). The job result is an array of rotate-sprite results, each with the generated image url and the camera_rotation and camera_elevation that were applied. Credits are held when the job is accepted and refunded if it fails or is cancelled; the charge scales with the number of images generated. Use this to produce alternate view angles of a character; use generatePose instead to change the character's pose rather than the camera, and animateSprite or transferMotion to bring a sprite to life. Pass an optional request_id to tag the results so you can retrieve them later via listGenerations (type spritesheet). Async generation job: returns `{id, status}` - poll `getApiJob` (job and credit contract: see the server instructions). Credits: This endpoint consumes 0.5 credits per result.

Search Ludo's own documentation with a plain-language question and get back only the few sections that answer it - the fastest way to learn how a feature is meant to be used before you generate with it (how to pick a sprite animation mode or model, how margins behave, what something costs, known limitations). Start here rather than reading whole documents. Each result carries `doc` and `section`, which you can pass straight to getDocs to re-read that section, and the section's full markdown `content`. Results are best first; weak matches are left out, so an empty `results` list means the documentation does not cover the question - rephrase it, or call getDocs with no parameters to browse the table of contents. This is the same documentation the Ludo web app shows its users, so it occasionally describes buttons rather than parameters; the substance applies to the API and MCP surfaces just the same. Returns up to `n` sections (default 3, max 10). If it answers 503 the search backend is briefly unavailable: call getDocs instead rather than retrying in a loop. This is a free discovery endpoint: it does not charge credits and does not queue a job.

Transfer motion from a reference video or a named animation preset onto a static sprite image, producing an animated spritesheet that mimics the reference movement. Provide the sprite as image (URL or base64) plus either a video URL or a preset_id together with perspective and direction (all three from listAnimationPresets; if both video and preset_id are sent the video wins). The job result is the same sprite result as animateSprite: `spritesheet_url`, `video_url`, grid fields, optional GIF / frame / with-background URLs, and `audio_b64` when the model is hydra. `duration` defaults to 1.5s where the chosen model offers it, otherwise to that model's shortest (hydra, the default, starts at 3s) - and a longer reference clip or preset is compressed to fit, so pass the preset's own `duration` (returned by listAnimationPresets) to keep its timing. It returns HTTP 400 if neither a video nor a complete preset_id/perspective/direction triple is supplied, if the named preset, perspective, or direction cannot be resolved, or if the model/duration combination is invalid. Credits are held when the job is accepted; the final charge is max(rate × produced seconds, the model's minimum charge) - the produced length follows the reference clip - and the difference (or everything, if the job fails or is cancelled) is refunded. Use this when you have an existing motion clip or preset to copy; prefer animateSprite to generate animation purely from a text prompt. Omit `model` to run on hydra (the default - most capable, and returns audio); pick forge for a cheaper run on simple motion, presets and matching poses; the `model` field lists rates. Pass an optional request_id to tag the result so you can retrieve it later via listGenerations (type spritesheet). Async generation job: returns `{id, status}` - poll `getApiJob` (job and credit contract: see the server instructions). Credits: credits/s × seconds, per model: Hydra 3/s (shortest duration 3s, so 9 credits minimum), Forge 2/s (min charge 4 credits), Forge Pixel 2/s (min charge 4 credits), Tango 4/s (min charge 4 credits) [LEGACY]; [LEGACY] models are scheduled for removal - do not use them for new work; see this endpoint's full pricing table in the API docs.

Upscale a previously generated video to twice its resolution (2x). Pass the video `url` you received from `createVideo`, `createVideoFromReferences`, or `editVideo` - it must be a video you generated within the last 7 days; arbitrary external videos are not accepted. Both dimensions of the source must be under 960 pixels: griffin (480p) output qualifies; griffin-hd (720p) output does not, landscape or portrait (only a square 720x720 would) - generate on griffin if you intend to upscale. A too-large source fails the job and the held credits are refunded. The job result is the new video URL (2x width and height, same duration) and its duration in seconds. Billed per second of video, independent of model; held when the job is accepted and refunded if it fails or is cancelled. Pass an optional `request_id` to tag the result so you can locate it later via listGenerations (type video). Related tools: `createVideo` for image-to-video, `editVideo` to modify a generated video. Async generation job: returns `{id, status}` - poll `getApiJob` (job and credit contract: see the server instructions). Credits: 0.2 credits per second of video.

Validates an API key. Returns 200 if valid, 403 if invalid.