singer-sdk
A framework for building Singer taps and targets
Decision gist · record as of 2026-08-14
Yes. The package is actively maintained, has no known vulnerabilities, uses a permissive license, and supports current Python versions. Install it if you need to build Singer-compliant data connectors or integrate with Meltano pipelines. It is not necessary if you only use pre-built connectors or do not work with Singer-based ELT.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.10 or later.
- Low install friction with a pure-wheel distribution.
- Active maintenance with a release 59 days ago and ongoing commits; the repository is not archived.
License · maintenance · safety
Apache-2.0 (permissive) — Apache-2.0 permissive license allows commercial and private use with minimal restrictions.
last release 2026-06-16 (59 days) · last repo commit 2026-08-11 · 118 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 8,511,986 downloads/mo, #1,615 on PyPI
Alternatives
Verify before relying
pip install singer-sdk
from singer_sdk import Tap, Target
from singer_sdk.typing import PropertiesList
class MyTap(Tap):
name = "my-tap"
config_jsonschema = PropertiesList().to_dict()
if __name__ == "__main__":
tap = MyTap()
tap.run()- Whether the 70% code reduction claim is typical across different connector types or specific to certain data sources.
- Specific Singer Spec version compliance level and any known incompatibilities with existing Singer ecosystem tools.
What it is and what it does
Singer SDK is a framework for building data extraction (tap) and loading (target) connectors that comply with the Singer Spec, an open standard for ELT pipelines. It reduces boilerplate by providing base classes, schema handling, state management, and Singer protocol compliance out of the box. The SDK integrates with Meltano, a broader ELT platform, but can also be used standalone to build Singer-compliant connectors.
Developers use it to create custom data connectors without reimplementing Singer protocol logic. The framework handles common concerns like configuration validation (via jsonschema), incremental state tracking, and record serialization. It depends on a broad set of utilities: click for CLI, sqlalchemy for database operations, jsonschema for validation, requests for HTTP, and several others for data transformation and path handling.
Use it for
- Build a custom tap to extract data from a proprietary or unsupported data source into Singer format.
- Create a target connector that loads Singer-formatted data into a custom data warehouse or application.
- Extend an existing Meltano project with a connector for a data source not in the 300+ natively supported list.
- Develop a reusable connector library that other teams can integrate into their ELT pipelines.
- Implement incremental sync logic for a data source without writing Singer protocol handling from scratch.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes.
The package is actively maintained, has no known vulnerabilities, uses a permissive license, and supports current Python versions. Install it if you need to build Singer-compliant data connectors or integrate with Meltano pipelines. It is not necessary if you only use pre-built connectors or do not work with Singer-based ELT.
Install
singer-sdk on PyPI
Before you install
Low install friction with a pure-wheel distribution. Active maintenance with a release 59 days ago and ongoing commits; the repository is not archived.
Requires Python 3.10 or later.
License in practice
Apache-2.0 permissive license allows commercial and private use with minimal restrictions.
Quickstart
pip install singer-sdk
from singer_sdk import Tap, Target
from singer_sdk.typing import PropertiesList
class MyTap(Tap):
name = "my-tap"
config_jsonschema = PropertiesList().to_dict()
if __name__ == "__main__":
tap = MyTap()
tap.run()Verify before relying
- Whether the 70% code reduction claim is typical across different connector types or specific to certain data sources.
- Specific Singer Spec version compliance level and any known incompatibilities with existing Singer ecosystem tools.
Package facts
| License | Apache-2.0 permissive |
| Python support | Supports the current Python release >=3.10 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 20 packagesbackports-datetime-fromisoformatclickfsspecimportlib-metadatainflectionjoblibjsonpath-ngjsonschemapackagingpython-backoffpython-dotenvpyyamlreferencingrequestssimpleevalsimplejsonsqlalchemytyping-extensionsuniversal-pathliburllib3 |
| Maintenance | Actively maintained 59 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 8,511,986 / month, #1,615 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Intended Audience :: DevelopersOperating System :: OS IndependentProgramming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.14Programming Language :: Python :: Implementation :: CPythonTopic :: Software Development :: Libraries :: Application FrameworksTyping :: Typed |
Evidence: singer_sdk-0.54.5-py3-none-any.whl
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See also meltano · meltanolabs-target-snowflake · pipelinewise-singer-python · acryl-datahub-airflow-plugin · tap.py · airflow-provider-fivetran-async · fivetran-connector-sdk · dagster-embedded-elt · openlineage-airflow · dagster-sling