Sideload Avatar Generator

Generate 3D avatars from text prompts or reference images using Sideload.gg. Pay-per-use via the x402 protocol — $2 USDC per generation on Base.

Works with any x402 wallet. Bring your own wallet and private key — no proprietary wallet required.

What You Get

Each generation produces four formats:

Format	File	Use Case
GLB	.glb	Universal 3D — Three.js, Unity, Unreal, web viewers
VRM	.vrm	Avatar standard — VRChat, VTubing, social apps
MML	URL	Metaverse Markup Language — for MML-compatible worlds
PNG	.png	Processed reference image used for generation

🎭 Rendering Avatars with @pixiv/three-vrm

The VRM output is designed to work with @pixiv/three-vrm — the standard Three.js library for loading, displaying, and animating VRM avatars. If you're already building with Three.js, generated avatars plug right in with full skeleton support:

import * as THREE from 'three';
import { GLTFLoader } from 'three/examples/jsm/loaders/GLTFLoader';
import { VRMLoaderPlugin } from '@pixiv/three-vrm';

const loader = new GLTFLoader();
loader.register((parser) => new VRMLoaderPlugin(parser));

loader.load('https://aiml.sideload.gg/models/avt-xxx.vrm', (gltf) => {
  const vrm = gltf.userData.vrm;
  scene.add(vrm.scene);

  // Animate bone transforms, look-at, etc.
});

This makes it easy to generate an avatar with Sideload and immediately use it in any Three.js scene — games, social apps, virtual worlds, VTubing, and more.

For more on building interactive 3D experiences in the metaverse, see awesome-mml — a curated list of MML (Metaverse Markup Language) resources.

Prerequisites

• Node.js 18+

• An x402 payment token — sign a payment with your own wallet/signer and pass it via --x402-token. This skill never handles private keys.

  # Check the cost first
  node scripts/generate.js --probe
  
  # Generate with your x402 token
  node scripts/generate.js --prompt "..." --x402-token <base64-encoded-payment>
  

  Use any x402-compatible client to obtain a payment token: Coinbase x402 SDK, Thirdweb x402, or your own signing flow.

Setup

npm install

Usage

Generate from Text Prompt

node scripts/generate.js --prompt "A cyberpunk samurai with glowing red armor" --x402-token <token>

Generate from Image URL

node scripts/generate.js --image https://example.com/character.png --x402-token <token>

Generate from Local Image

node scripts/generate.js --image /path/to/photo.jpg --x402-token <token>

Check Cost (No Payment)

node scripts/generate.js --probe

Check Job Status

node scripts/status.js avt-a1b2c3d4

Options

Flag	Description
--prompt "text"	Text description of the avatar
--image <url-or-path>	Reference image (URL or local file path)
--x402-token <token>	x402 payment token (required for generation)
--probe	Check cost without generating
--output <name>	Custom filename for downloaded files
--no-download	Skip downloading result files

API Reference

See SIDELOAD-API.md for the full API documentation, or visit sideload.gg/agents/raw.

Quick Reference

Generate:

POST https://sideload.gg/api/agent/generate
Headers: Content-Type: application/json, x-payment: <x402_token>

Text: { "type": "text", "prompt": "description" } Image: { "type": "image", "imageUrl": "https://..." }

Poll: GET https://sideload.gg/api/agent/generate/{jobId}/status (no auth needed)

Prompt Tips

Be specific about:

• Appearance: clothing, colors, accessories
• Style: realistic, anime, cartoon, cyberpunk
• Features: armor, weapons, hairstyle, wings

Good prompts:

• "A steampunk engineer with leather tool belt, copper mechanical arm, weathered pilot hat"
• "An anime-style sorceress with long silver hair, glowing purple eyes, ornate golden staff"
• "A futuristic soldier in white and blue power armor with glowing energy shield"

Image Tips

• PNG, JPG, or WebP
• Front-facing portraits or full-body shots work best
• Clear outlines and distinct clothing/features
• Higher resolution → better results

Rate Limits & Cost

• $2 USDC per generation (x402 on Base, chain ID 8453)
• 10 generations per 30 minutes per wallet
• Check Retry-After header on 429 responses

Links

• Sideload.gg
• API Documentation
• @pixiv/three-vrm — Three.js VRM avatar loader
• awesome-mml — MML resources for the metaverse
• x402 Protocol
• Coinbase x402 SDK
• VRM Specification
• MML (Metaverse Markup Language)