# Client APIs

- [Alluxio Python Filesystem API based on FSSpec](/ee-ai-en/ai-3.5/api/fsspec.md)
- [FUSE based POSIX API](/ee-ai-en/ai-3.5/api/fuse-based-posix-api.md)
- [Client Writeback](/ee-ai-en/ai-3.5/api/fuse-based-posix-api/client-writeback.md)
- [S3 API](/ee-ai-en/ai-3.5/api/s3-api.md)