Singer

Open-source standard for writing scripts that move data, with a simple JSON-based protocol for taps (extractors) and targets (loaders).

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Key Features

✓ JSON messages: Schema, record, and state messages
✓ Language agnostic: Write taps in any language
✓ Stateful syncs: Built-in incremental replication support
✓ Schema evolution: Automatic schema detection and propagation
✓ 300+ taps: Community-built extractors for popular sources
✓ 50+ targets: Loaders for warehouses, databases, and files
✓ Meltano integration: First-class Singer support
✓ Stitch foundation: Production-tested at scale
✓ pip installable: Most taps available via PyPI
✓ CLI-based: Simple command-line interface
✓ Configurable: JSON config files for credentials
✓ Testable: Easy to unit test individual components