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The SFTP capture connector in Estuary captures files from an SFTP server and loads their contents into Estuary collections. It can continuously discover and ingest newly added files from a configured directory and its subdirectories, making it useful for automated file-based data pipelines.

• Incremental file capture based on file modification time
• Recursive capture from subdirectories within the configured SFTP directory
• File filtering with regular expressions to capture only matching files
• Supports Avro, CSV, JSON, Protobuf, and W3C Extended Log formats
• Supports ZIP, GZIP, and ZSTD compression, with automatic compression detection
• Automatic file format and schema detection for most captures
• Multiple directory bindings within a single capture task
• Password or SSH key authentication
• Optional Ascending Keys mode for environments where files are written in strict lexicographical path order

By default, Estuary captures existing files and then incrementally captures newly added files according to their modification timestamps. If a file’s modification time changes, it may be captured again. For controlled file-naming schemes, Ascending Keys mode can instead process newly added files based on lexicographical path ordering.