📖 Supported S3 Operations

L3 implements the S3 REST surface that mainstream tools actually use. Requests are authenticated with AWS Signature Version 4 (header or presigned query form).

Service & bucket operations

Operation	Status	Notes
ListBuckets	✅	Your buckets only
CreateBucket	✅	Names globally unique
HeadBucket	✅
DeleteBucket	✅	Must be empty
GetBucketLocation	✅	Returns auto
ListObjects (v1)	✅	prefix, delimiter, marker
ListObjectsV2	✅	prefix, delimiter, pagination, start-after, encoding-type=url
DeleteObjects (batch)	✅

Object operations

Operation	Status	Notes
PutObject	✅	Including aws-chunked streaming bodies; custom x-amz-meta-*
GetObject	✅	Range requests (206)
HeadObject	✅
DeleteObject	✅	See S3 and IPFS semantics
CopyObject	✅	Zero-copy: instant regardless of size (same CID)
Presigned URLs	✅	SigV4 query auth, X-Amz-Expires honored

Multipart uploads

Operation	Status	Notes
CreateMultipartUpload	✅
UploadPart	✅
CompleteMultipartUpload	✅	Standard md5-of-md5s-N ETag; produces one CID
AbortMultipartUpload	✅
ListParts	✅
UploadPartCopy	❌	Planned

Compatibility stubs

These subresources return safe, well-formed defaults so common tooling (Terraform, rclone, consoles) doesn't break, but the features are not active:

versioning, acl, policy, lifecycle, cors, tagging, encryption, website, logging, notification, object-lock, replication, and similar bucket configuration endpoints.

Not supported

• Bucket policies / IAM — access is per keypair; each bucket has exactly one owner
• Object versioning API (although prior versions' CIDs are retained internally — see semantics)
• Object tagging, If-Match / If-None-Match conditional requests (planned)

See Limits & Differences for behavioral differences from Amazon S3.