# AI3D API v2 model: mixamo-rig-retarget

Apply AI3D's saved Mixamo animation clips directly to a Mixamo-rigged GLB.

- AI3D model ID: `mixamo-rig-retarget`
- Provider: AI3D local Blender operation
- Price: $0.01 per selected clip; check `GET /v2/billing/prices` for the exact reservation.
- Output: a rigged GLB artifact named `mixamo-rig-animations.glb`, with one named glTF animation per selected clip.

## Animation library

Call authenticated `GET /v2/anigen/animations` to list stable animation IDs. The private library contains 23 Mixamo-compatible FBX clips. At most eight clips may be applied in one job. If `input.animations` is omitted, AI3D applies `idle`, `walking`, `running`, and `jump`.

## Source and request

GLB inputs must be self-contained: embed every buffer and image in the GLB or a supported base64 data URI. External paths and URLs inside the model are rejected before Blender runs.

Provide exactly one source: your own completed v2 Tripo `tripo-rig` job created with `input.spec: "mixamo"`, or a public HTTPS GLB `model_url`.

```json
{
  "model": "mixamo-rig-retarget",
  "source_job_id": "<your completed Tripo Mixamo rig job UUID>",
  "input": {
    "animations": ["idle", "walking", "running", "jump"]
  }
}
```

For a public GLB URL, replace `source_job_id` with `model_url: "https://…/model.glb"`. The GLB must contain a skinned Mixamo biped with `Hips`, `LeftUpLeg`, `RightUpLeg`, `LeftArm`, and `RightArm` bones. `animations` must contain 1–8 unique IDs from the animation-library endpoint.

The worker maps matching Mixamo bone names directly, samples each uploaded FBX action, and exports the original mesh with the selected clips. The result is meant for Mixamo-compatible rigs; differences in bone rest pose, axes, and proportions can affect motion quality.

## Lifecycle

The request returns `202 Accepted` with a normal job ID. Poll `GET /v2/jobs/{id}` until it succeeds or fails, then download `mixamo-rig-animations.glb` from its authenticated artifact URL. The worker reads the public source GLB when `model_url` is used; it does not create a Tripo job.