Scale AI Python API Docs | dltHub

Scale AI provides a data engine for AI, offering a REST API for managing labeling, evaluation, and generative AI data pipelines. The REST API base URL is https://api.scale.com/v1 and all requests require HTTP Basic Auth with the API key as the username and no password.

dlt is an open-source Python library that handles authentication, pagination, and schema evolution automatically. dlthub provides AI context files that enable code assistants to generate production-ready pipelines. Install with uv add "dlt[hub]" and start loading Scale AI data in under 10 minutes.

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What data can I load from Scale AI?

Here are some of the endpoints you can load from Scale AI:

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How do I authenticate with the Scale AI API?

Scale uses HTTP Basic Auth, requiring the API key as the username with no password (leave blank). The authorization header must follow the format 'Basic [Base64-encoded-key:]'.

1. Get your credentials

1. Log in to your Scale AI account at https://dashboard.scale.com. 2. Navigate to your profile settings. 3. Select 'API Key' from the menu to view or generate your Live or Test API keys. Note: Only users with Admin or Manager roles have access to API keys. If you do not see this option, contact your team administrator to update your role.

2. Add them to .dlt/secrets.toml

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[sources.scale_ai_source]
api_key = "live_your_actual_key_here"

dlt reads this automatically at runtime — never hardcode tokens in your pipeline script. For production environments, see setting up credentials with dlt for environment variable and vault-based options.

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How do I set up and run the pipeline?

Set up a virtual environment and install dlt:

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uv init
uv add "dlt[hub]"

1. Install the dlt AI harness:

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uv run dlthub ai init --agent <your-agent> # <agent>: claude | cursor | codex

This installs project rules, a secrets management skill, appropriate ignore files, and configures the dlt MCP server for your agent. Learn more →

2. Install the rest-api-pipeline toolkit:

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uv run dlthub ai toolkit install rest-api-pipeline

This loads the skills and context about dlt the agent uses to build the pipeline iteratively, efficiently, and safely. The agent uses MCP tools to inspect credentials — it never needs to read your secrets.toml directly. Learn more →

3. Start LLM-assisted coding:

Use /find-source to load data from the Scale AI API into DuckDB.

The rest-api-pipeline toolkit takes over from here — it reads relevant API documentation, presents you with options for which endpoints to load, and follows a structured workflow to scaffold, debug, and validate the pipeline step by step.

4. Run the pipeline:

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uv run python scale_ai_pipeline.py

If everything is configured correctly, you'll see output like this:

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Pipeline scale_ai_pipeline load step completed in 0.26 seconds
1 load package(s) were loaded to destination duckdb and into dataset scale_ai_data
The duckdb destination used duckdb:/scale_ai.duckdb location to store data
Load package 1749667187.541553 is LOADED and contains no failed jobs

Inspect your pipeline and data:

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uv run dlthub show

This opens the Pipeline Dashboard where you can verify pipeline state, load metrics, schema (tables, columns, types), and query the loaded data directly.

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Python pipeline example

This example loads /v1/tasks and /v1/batches from the Scale AI API into DuckDB. It mirrors the endpoint and data selector configuration from the table above:

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import dlt
from dlt.sources.rest_api import RESTAPIConfig, rest_api_resources

@dlt.source
def scale_ai_source(api_key=dlt.secrets.value):
    config: RESTAPIConfig = {
        "client": {
            "base_url": "https://api.scale.com/v1",
            "auth": {"type": "http_basic", "username": "REPLACE_ME", "password": api_key},
        },
        "resources": [
            {"name": "tasks", "endpoint": {"path": "v1/tasks", "data_selector": "docs"}},
            {"name": "batches", "endpoint": {"path": "v1/batches"}}
        ],
    }
    yield from rest_api_resources(config)


def get_data() -> None:
    pipeline = dlt.pipeline(
        pipeline_name="scale_ai_pipeline",
        destination="duckdb",
        dataset_name="scale_ai_data",
    )
    load_info = pipeline.run(scale_ai_source())
    print(load_info)

To add more endpoints, append entries from the resource table to the "resources" list using the same name, path, and data_selector pattern.

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How do I query the loaded data?

Once the pipeline runs, dlt creates one table per resource. You can query with Python or SQL.

Python (pandas DataFrame):

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import dlt

data = dlt.pipeline("scale_ai_pipeline").dataset()
sessions_df = data.tasks.df()
print(sessions_df.head())

SQL (DuckDB example):

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SELECT * FROM scale_ai_data.tasks LIMIT 10;

In a marimo or Jupyter notebook:

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import dlt

data = dlt.pipeline("scale_ai_pipeline").dataset()
data.tasks.df().head()

See how to explore your data in marimo Notebooks and how to query your data in Python with dataset.

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What destinations can I load Scale AI data to?

dlt supports loading into any of these destinations — only the destination parameter changes:

Change the destination in dlt.pipeline(destination="snowflake") and add credentials in .dlt/secrets.toml. See the full destinations list.

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Next steps

Continue your data engineering journey with the other toolkits of the dltHub AI harness:

• data-exploration — Build custom notebooks, charts, and dashboards for deeper analysis with marimo notebooks.
• dlthub-platform — Deploy, schedule, and monitor your pipeline in production.

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uv run dlthub ai toolkit install data-exploration
uv run dlthub ai toolkit install dlthub-platform

• How to deploy a pipeline
• How to explore your data in marimo Notebooks
• How to query your data in Python with dataset
• Join the dlt community on Slack