Load Toggl Track data to DuckDB

Toggl Track is a time-tracking platform that provides a REST API for managing users, workspaces, and time entries. Everything needed to build a working Toggl Track → DuckDB pipeline is on this page: the API's base URL, authentication, endpoints, pagination and incremental field — plus a prompt that hands the whole job to your coding agent.

---

Build your Toggl Track to DuckDB pipeline

Paste this prompt into Claude, Codex, or Cursor. The agent does the rest.

PromptCopy prompt
Run uvx dlthub-init@latest to build a pipeline from Toggl Track to DuckDB and run it on dltHub

That scaffolds a dltHub workspace and installs the dltHub AI harness — the project rules, the secrets-management skill, and the dlt MCP server your agent needs to work safely. From there it reads the Toggl Track API, proposes the endpoints to load, then writes, runs and validates the pipeline while you review rather than type. Credentials are inspected through MCP tools, so your agent never reads secrets.toml itself. How the LLM-native workflow works →

Prefer to write it yourself? Every fact the agent uses is below.

---

Toggl Track API at a glance

These values come from the Toggl Track API reference — the authoritative source if anything here looks out of date.

---

How do I authenticate with the Toggl Track API?

Toggl Track uses HTTP Basic Authentication. The Authorization header must be set to 'Basic ' followed by a Base64-encoded string in the format 'api_token:api_token' (where the password portion is literally 'api_token').

1. Get your credentials

To obtain your API key, log in to your Toggl Track account. Navigate to the bottom-left corner of the interface, click your Profile icon, and select Profile settings. Scroll down to the API Token section, where your token is displayed and can be regenerated if necessary.

2. Add them to .dlt/secrets.toml

Copy
[sources.toggl_track_source]
api_token = "your_api_token_here"

dlt reads this file automatically at runtime. With the harness, the setup-secrets skill prompts you for the values and never handles the raw credential in chat. For production, see setting up credentials with dlt.

---

What Toggl Track data can I load into DuckDB?

These are the Toggl Track endpoints dlt can load into DuckDB:

---

How do I load only new Toggl Track records?

Toggl Track exposes start_project_id on api/v9/me/projects/paginated, so dlt can request only the records that changed since the last run. Set it as the cursor_path and dlt tracks the high-water mark for you between runs.

Copy
{"name": "projects_paginated", "endpoint": {
    "path": "api/v9/me/projects/paginated",
    "incremental": {"cursor_path": "start_project_id", "initial_value": "2024-01-01T00:00:00Z"},
}}

On the first run dlt loads everything from initial_value; on every run after that it requests only what changed and appends with write_disposition="merge" if you set a primary key. See incremental loading.

---

What does the generated Toggl Track pipeline look like?

A standard dlt REST API pipeline — the same code you would write by hand, loading /me and /workspaces from the Toggl Track API into DuckDB:

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

@dlt.source
def toggl_track_source(api_token=dlt.secrets.value):
    config: RESTAPIConfig = {
        "client": {
            "base_url": "https://api.track.toggl.com/api/v9",
            "auth": {"type": "http_basic", "username": "REPLACE_ME", "password": api_token},
        },
        "resources": [
            {"name": "projects_paginated", "endpoint": {"path": "api/v9/me/projects/paginated"}},
            {"name": "time_entries", "endpoint": {"path": "api/v9/me/time_entries"}}
        ],
    }
    yield from rest_api_resources(config)


def load_toggl_track_to_duckdb() -> None:
    pipeline = dlt.pipeline(
        pipeline_name="toggl_track_pipeline",
        destination="duckdb",
        dataset_name="toggl_track_data",
    )
    load_info = pipeline.run(toggl_track_source())
    print(load_info)


if __name__ == "__main__":
    load_toggl_track_to_duckdb()

Run it with python toggl_track_pipeline.py. The agent iterates on this until it loads cleanly — you review and approve, rather than write it from scratch.

---

How do I query Toggl Track data in DuckDB?

dlt creates one table per resource. Query the loaded data with Python or SQL — or ask your agent to, through the MCP server's execute_sql_query tool.

Python (pandas DataFrame):

Copy
import dlt

data = dlt.pipeline("toggl_track_pipeline").dataset()
df = data.projects_paginated.df()
print(df.head())

SQL:

Copy
SELECT * FROM toggl_track_data.projects_paginated LIMIT 10;

See querying your data with dataset and exploring it in marimo notebooks.

---

How do I deploy the Toggl Track to DuckDB pipeline in production?

The pipeline runs locally, which is ideal for prototyping and one-off analysis. When you need it on a schedule, monitored on every load, and shared with your team, deploy the same dlt code on the dltHub platform — no infrastructure to maintain. The prompt above already ends with "run it on dltHub", so your agent can take it there directly.

• Deploy & schedule — run the pipeline as a managed job with automatic retries.
• Monitor — observable job queues, alerting, and load metrics for every run.
• Transform — promote raw Toggl Track loads into governed, documented models.
• Visualize & share — explore data in notebooks and publish live dashboards instead of static screenshots.

Book a demo →

---

What other destinations can I load Toggl Track data to?

dlt loads into any of these — only the destination argument changes:

Set dlt.pipeline(destination="snowflake") and add credentials in .dlt/secrets.toml. On the dltHub platform the same pipeline runs against a managed Iceberg lakehouse. See the full destinations list.

---

Next steps

• Ready for production? Book a demo of the dltHub platform →
• dlt LLM-native workflow docs
• REST API source reference
• Join the dlt community on Slack