3D Models

Describe it.Play it.

Describe a character or a four-legged animal and get it back modeled, rigged and animated: idle, walk, run, jump and more, in one file.

Try in browser Developer docs

250 credits per job · 300 free credits to start

“a stylized knight with a round shield on his back”: the walk, one of eight clips in the same file. Drag to turn it; the page plays a web copy (Draco geometry, WebP textures) of the job's model.glb.

The same file's run clip, looping in place.
Its jump.
“a friendly cartoon fox”: found to be four-legged, so six clips; here the walk.

One job, not five.

The picture, the model, the triangle budget, the skeleton and the animations are made in one job, for one price.

Ready for the engine.

One file with every clip named, looping where it should and on the spot. A humanoid's bones carry the Mixamo names animation tools expect.

Checked, not trusted.

Every clip is measured for sliding feet, the floor and sudden turns, the skin is bend-tested, and pictures show both.

Pricing

Pay by the job.

250 credits per job. A job that fails costs nothing.

Pricing details

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300free credits when you sign up

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Each tool states its price before you run it
Failed API jobs cost nothing

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Price per job

Create a game asset

Per job: 250 credits

Limits

Model: 1,000 to 100,000 triangles
Bodies: Humanoids and four-legged animals; props, vehicles, birds and winged creatures are refunded

Limits by accountFreePay as you goMonthly bundle

Limits by account

Jobs per 24 hours: Free3; Pay as you go20; Monthly bundle100
Jobs at once: Free3 jobs; Pay as you go5 jobs; Monthly bundle8 jobs
Results kept: Free1 day; Pay as you go7 days; Monthly bundle30 days

Free until your first purchase; any credit pack moves you to Pay as you go; a monthly bundle while it lasts. GPU tools like this one run up to 5 of your jobs at a time; the rest wait their turn. Compare accounts

API

Your agent or your code.

Connect your agent and it can use this tool right away, or call it from your own code. One key works for both.

Start a job

Send the required parameters as JSON. Options such as description go in the options object.

Requestcreate.sh

# idempotency_key is required: repeating it returns the same job
curl https://api.mcpbytes.com/v1/tools/create_game_asset/jobs \
  -H "Authorization: Bearer $MCPBYTES_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "options": {
      "description": "a stylized knight with a round shield on his back",
      "seed": 42
    },
    "idempotency_key": "game-asset-example-001"
  }'

Response202 Accepted · trimmed

{
  "tool": "create_game_asset",
  "status": "queued",
  "input_kind": "parameters",
  "workflow": {
    "stage": "Generating visuals",
    "deadline": "2026-09-29T04:53:33.061Z",
    "cancel_pending": false,
    "refund_pending": false
  },
  "capabilities": {
    "can_cancel": true
  },
  "options": {
    "description": "a stylized knight with a round shield on his back",
    "target_faces": 20000,
    "texture_resolution": 2048,
    "body": "auto",
    "in_place": true,
    "seed": 42
  },
  "result": null
}

Get the result

Poll until the status is final. Download files only after success.

Requestread.sh

# JOB_ID is the id from the create response; poll until status is final
curl "https://api.mcpbytes.com/v1/jobs/$JOB_ID" \
  -H "Authorization: Bearer $MCPBYTES_API_KEY"

# Once status is succeeded, download each file from result.files[].url
curl -fsSLo model.glb "$MODEL_URL"

Response200 OK · trimmed

{
  "tool": "create_game_asset",
  "status": "succeeded",
  "result": {
    "notes": [],
    "body": "humanoid",
    "faces": 20000,
    "bone_count": 34,
    "clips": [
      {
        "name": "idle",
        "status": "passed"
      },
      {
        "name": "walk",
        "status": "passed"
      },
      {
        "name": "run",
        "status": "passed"
      },
      {
        "name": "jump",
        "status": "passed"
      },
      {
        "name": "attack",
        "status": "passed"
      },
      {
        "name": "hit",
        "status": "passed"
      },
      {
        "name": "wave",
        "status": "passed"
      },
      {
        "name": "death",
        "status": "passed"
      }
    ],
    "status": "failed_checks",
    "issues": [
      {
        "type": "stretch",
        "bone": "mixamorig:LeftShoulder",
        "value": 7.8137,
        "threshold": 2,
        "severity": 0.977,
        "axis": "b",
        "degrees": -45
      }
    ],
    "files": [
      {
        "name": "rig_report.json",
        "bytes": 6443,
        "content_type": "application/json",
        "url": "https://api.mcpbytes.com/blob/dl/…"
      },
      {
        "name": "model.glb",
        "bytes": 3755956,
        "content_type": "model/gltf-binary",
        "url": "https://api.mcpbytes.com/blob/dl/…"
      },
      {
        "name": "motion_report.json",
        "bytes": 5969,
        "content_type": "application/json",
        "url": "https://api.mcpbytes.com/blob/dl/…"
      },
      {
        "name": "motion_preview.png",
        "bytes": 330696,
        "content_type": "image/png",
        "url": "https://api.mcpbytes.com/blob/dl/…"
      }
    ]
  },
  "compute_ms": 492225,
  "credits_charged": 250
}

MCP

Connect once. Your agent calls create_game_asset and gets the download URLs back. This endpoint has only this tool's family, which keeps your agent's tool list short; one endpoint has every tool.

Claude CodeOAuth or API key

The first form signs in through the browser when you run /mcp. In .mcp.json (project root), ${MCPBYTES_API_KEY} is read from the environment when Claude Code connects. Claude Code docs

claude mcp add --transport http mcpbytes \
  https://api.mcpbytes.com/mcp/3d

Codex (CLI, IDE extension, ChatGPT desktop)OAuth or API key

Codex reads the key from the environment variable each time it connects. The same table can go in ~/.codex/config.toml by hand; codex mcp add has no --header flag. Codex docs

codex mcp add mcpbytes --url https://api.mcpbytes.com/mcp/3d \
  --bearer-token-env-var MCPBYTES_API_KEY

CursorOAuth or API key

~/.cursor/mcp.json (all projects) or .cursor/mcp.json (one project). Remote servers take no "type". Without the header, the client signs you in with GitHub or an email link (OAuth). Cursor docs

~/.cursor/mcp.json

{
  "mcpServers": {
    "mcpbytes": {
      "url": "https://api.mcpbytes.com/mcp/3d",
      "headers": {
        "Authorization": "Bearer ${env:MCPBYTES_API_KEY}"
      }
    }
  }
}

11 more clients in the docs →

MCP tools

create_game_asset: Creates a game-ready animated character from a description: a textured 3D model, rebuilt at your triangle budget (1,000 to 100,000) with new textures, rigged, and animated with a standard set of clips in one GLB. Humanoids (people and humanoid characters) get idle, walk, run, jump, attack, hit, wave and death; four-legged animals get idle, walk, run, jump, attack and death. idle, walk and run loop; clips play in place unless in_place is false. Humanoid bones carry Mixamo names (mixamorig:Hips…). Returns model.glb (rigged and animated, uncompressed, textures embedded), reference.png, rig.json, rig_report.json, rig_preview.png, motion.json, motion_report.json (checks per clip), motion_preview.png and generation.json. Other bodies (props, vehicles, birds, winged creatures) are not supported: such a job fails and is refunded. For another motion, pass model.glb to animate_3d_model with keep_animations. This is an asynchronous job of several minutes, longer when workers start cold; use get_job to follow progress. A failed job is refunded. Costs 250 credits per job. Requires idempotency_key; retain it when retrying the same request.
create_upload: Returns a one-hour URL to PUT a local file to; then call the tool with the upload_id.
get_job: Status and results of a job; waits up to wait_seconds for it to finish.
cancel_job: Cancel a queued job or a workflow whose can_cancel is true; repeated calls never delete results.
list_jobs: Your most recent jobs, newest first.
read_job_file: Reads a text output (.txt .json .md .csv) of a succeeded job in chunks.

Full reference: inputs, options, outputs, limits and errors

Your first jobs are on us.

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Try in browser Developer docs