# API Reference

## Workers Binding API

```toml
# wrangler.toml
[images]
binding = "IMAGES"
```

### Transform Images

```typescript
const imageResponse = await env.IMAGES.input(fileBuffer)
  .transform({ width: 800, height: 600, fit: 'cover', quality: 85, format: 'avif' })
  .output()
return imageResponse.response()
```

### Transform Options

```typescript
interface TransformOptions {
  width?: number
  height?: number
  fit?: 'scale-down' | 'contain' | 'cover' | 'crop' | 'pad'
  quality?: number // 1-100
  format?: 'avif' | 'webp' | 'jpeg' | 'png'
  dpr?: number // 1-3
  gravity?: 'auto' | 'left' | 'right' | 'top' | 'bottom' | 'face' | string
  sharpen?: number // 0-10
  blur?: number // 1-250
  rotate?: 90 | 180 | 270
  background?: string // CSS color for pad
  metadata?: 'none' | 'copyright' | 'keep'
  brightness?: number
  contrast?: number
  gamma?: number // 0-2
}
```

### Draw/Watermark

```typescript
await env.IMAGES.input(baseImage)
  .draw(env.IMAGES.input(watermark).transform({ width: 100 }), { top: 10, left: 10, opacity: 0.8 })
  .output()
```

## REST API

### Upload Image

```bash
curl -X POST https://api.cloudflare.com/client/v4/accounts/{account_id}/images/v1 \
  -H "Authorization: Bearer {token}" -F file=@image.jpg -F metadata='{"key":"value"}'
```

### Other Operations

```bash
GET  /accounts/{account_id}/images/v1/{image_id}      # Get details
DELETE /accounts/{account_id}/images/v1/{image_id}   # Delete
GET  /accounts/{account_id}/images/v1?page=1         # List
```

## URL Transform API

```
https://imagedelivery.net/{hash}/{id}/width=800,height=600,fit=cover,format=avif
```

**Params:** `w=`, `h=`, `fit=`, `q=`, `f=`, `dpr=`, `gravity=`, `sharpen=`, `blur=`, `rotate=`, `background=`, `metadata=`

## Direct Creator Upload

```typescript
// 1. Get upload URL (backend)
const { result } = await fetch(
  `https://api.cloudflare.com/client/v4/accounts/${accountId}/images/v2/direct_upload`,
  {
    method: 'POST',
    headers: { Authorization: `Bearer ${token}` },
    body: JSON.stringify({ requireSignedURLs: false }),
  }
).then((r) => r.json())

// 2. Client uploads to result.uploadURL
const formData = new FormData()
formData.append('file', file)
await fetch(result.uploadURL, { method: 'POST', body: formData })
```

## Error Codes

| Code | Message           | Solution                 |
| ---- | ----------------- | ------------------------ |
| 5400 | Invalid format    | Use JPEG, PNG, GIF, WebP |
| 5401 | Too large         | Max 100MB                |
| 5403 | Invalid transform | Check params             |
| 9413 | Rate limit        | Implement backoff        |