npm install -g wrangler
wrangler login

# R2-specific credentials
R2_ACCESS_KEY_ID=your_r2_access_key_id_here
R2_SECRET_ACCESS_KEY=your_r2_secret_access_key_here
R2_ACCOUNT_ID=your_account_id_here

# Or use general Cloudflare credentials
CLOUDFLARE_ACCOUNT_ID=your_account_id_here
CLOUDFLARE_API_TOKEN=your_api_token_here  # For Wrangler CLI

# See .claude/skills/.env.example for complete configuration
R2_ACCESS_KEY_ID=abc123...
R2_SECRET_ACCESS_KEY=xyz789...
R2_ACCOUNT_ID=def456...

wrangler r2 bucket create my-bucket

wrangler r2 bucket create my-bucket --location=wnam

wrangler r2 object put my-bucket/file.txt --file=./local-file.txt

await env.MY_BUCKET.put('file.txt', fileContents, {
  httpMetadata: {
    contentType: 'text/plain',
  },
});

wrangler r2 object get my-bucket/file.txt --file=./downloaded.txt

const object = await env.MY_BUCKET.get('file.txt');
const contents = await object.text();

[[r2_buckets]]
binding = "MY_BUCKET"
bucket_name = "my-bucket"
preview_bucket_name = "my-bucket-preview"

await env.MY_BUCKET.put('user-uploads/photo.jpg', imageData, {
  httpMetadata: {
    contentType: 'image/jpeg',
    cacheControl: 'public, max-age=31536000',
  },
  customMetadata: {
    uploadedBy: userId,
    uploadDate: new Date().toISOString(),
  },
});

const object = await env.MY_BUCKET.get('large-file.mp4');
if (object === null) {
  return new Response('Not found', { status: 404 });
}

return new Response(object.body, {
  headers: {
    'Content-Type': object.httpMetadata.contentType,
    'ETag': object.etag,
  },
});

const listed = await env.MY_BUCKET.list({
  prefix: 'user-uploads/',
  limit: 100,
});

for (const object of listed.objects) {
  console.log(object.key, object.size);
}

await env.MY_BUCKET.delete('old-file.txt');

const object = await env.MY_BUCKET.head('file.txt');
if (object) {
  console.log('Exists:', object.size, 'bytes');
}

aws configure
# Access Key ID: <your-key-id>
# Secret Access Key: <your-secret>
# Region: auto

# List buckets
aws s3api list-buckets --endpoint-url https://<accountid>.r2.cloudflarestorage.com

# Upload file
aws s3 cp file.txt s3://my-bucket/ --endpoint-url https://<accountid>.r2.cloudflarestorage.com

# Generate presigned URL (expires in 1 hour)
aws s3 presign s3://my-bucket/file.txt --endpoint-url https://<accountid>.r2.cloudflarestorage.com --expires-in 3600

import { S3Client, PutObjectCommand } from "@aws-sdk/client-s3";

const s3 = new S3Client({
  region: "auto",
  endpoint: `https://${accountId}.r2.cloudflarestorage.com`,
  credentials: {
    accessKeyId: process.env.R2_ACCESS_KEY_ID,
    secretAccessKey: process.env.R2_SECRET_ACCESS_KEY,
  },
});

await s3.send(new PutObjectCommand({
  Bucket: "my-bucket",
  Key: "file.txt",
  Body: fileContents,
}));

import boto3

s3 = boto3.client(
    service_name="s3",
    endpoint_url=f'https://{account_id}.r2.cloudflarestorage.com',
    aws_access_key_id=access_key_id,
    aws_secret_access_key=secret_access_key,
    region_name="auto",
)

# Upload file
s3.upload_fileobj(file_obj, 'my-bucket', 'file.txt')

# Download file
s3.download_file('my-bucket', 'file.txt', './local-file.txt')

rclone config
# Select: Amazon S3 → Cloudflare R2
# Enter credentials and endpoint

# For large files (>100MB)
rclone copy large-video.mp4 r2:my-bucket/ \
  --s3-upload-cutoff=100M \
  --s3-chunk-size=100M

wrangler r2 bucket create my-public-bucket
# Then enable in dashboard: R2 → Bucket → Settings → Public Access

https://pub-<hash>.r2.dev/file.txt

wrangler r2 bucket cors put my-bucket --rules '[
  {
    "AllowedOrigins": ["https://example.com"],
    "AllowedMethods": ["GET", "PUT", "POST"],
    "AllowedHeaders": ["*"],
    "ExposeHeaders": ["ETag"],
    "MaxAgeSeconds": 3600
  }
]'

const multipart = await env.MY_BUCKET.createMultipartUpload('large-file.mp4');

// Upload parts (5MiB - 5GiB each, max 10,000 parts)
const part1 = await multipart.uploadPart(1, chunk1);
const part2 = await multipart.uploadPart(2, chunk2);

// Complete upload
const object = await multipart.complete([part1, part2]);

# Enable for bucket
wrangler r2 bucket sippy enable my-bucket \
  --provider=aws \
  --bucket=source-bucket \
  --region=us-east-1 \
  --access-key-id=$AWS_KEY \
  --secret-access-key=$AWS_SECRET

wrangler r2 bucket lifecycle put my-bucket --rules '[
  {
    "action": {"type": "AbortIncompleteMultipartUpload"},
    "filter": {},
    "abortIncompleteMultipartUploadDays": 7
  },
  {
    "action": {"type": "Transition", "storageClass": "InfrequentAccess"},
    "filter": {"prefix": "archives/"},
    "daysFromCreation": 90
  }
]'

wrangler r2 bucket notification create my-bucket \
  --queue=my-queue \
  --event-type=object-create

{
  "account": "account-id",
  "bucket": "my-bucket",
  "object": {"key": "file.txt", "size": 1024, "etag": "..."},
  "action": "PutObject",
  "eventTime": "2024-01-15T12:00:00Z"
}