Fakturoid Python API Docs | dltHub

Fakturoid is an online invoicing and accounting platform offering a REST API (v3) to manage accounts, invoices, expenses, subjects, users, generators and related resources. The REST API base URL is https://app.fakturoid.cz/api/v3 and All requests require an OAuth 2.0 Bearer access token..

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 pip install "dlt[workspace]" and start loading Fakturoid data in under 10 minutes.

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What data can I load from Fakturoid?

Here are some of the endpoints you can load from Fakturoid:

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How do I authenticate with the Fakturoid API?

Obtain an OAuth 2.0 access token via Authorization Code or Client Credentials flow. Include Authorization: Bearer <access_token> and a User-Agent header on every request.

1. Get your credentials

1. Create an integration in Fakturoid (Settings → Connect other apps → OAuth 2 for app developers) to obtain a Client ID and Client Secret. 2) Request a token via POST /oauth/token using HTTP Basic authentication (client_id:client_secret). 3) Use the returned access_token in the Authorization: Bearer header for API calls.

2. Add them to .dlt/secrets.toml

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[sources.fakturoid_source]
token = "your_oauth2_access_token_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 venv && source .venv/bin/activate
uv pip install "dlt[workspace]"

1. Install the dlt AI Workbench:

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dlt 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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dlt ai toolkit rest-api-pipeline install

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 Fakturoid 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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python fakturoid_pipeline.py

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

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Pipeline fakturoid_pipeline load step completed in 0.26 seconds
1 load package(s) were loaded to destination duckdb and into dataset fakturoid_data
The duckdb destination used duckdb:/fakturoid.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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dlt pipeline fakturoid_pipeline 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 expenses and invoices from the Fakturoid 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 fakturoid_source(access_token=dlt.secrets.value):
    config: RESTAPIConfig = {
        "client": {
            "base_url": "https://app.fakturoid.cz/api/v3",
            "auth": {
                "type": "bearer",
                "token": access_token,
            },
        },
        "resources": [
            {"name": "expenses", "endpoint": {"path": "accounts/{slug}/expenses.json"}},
            {"name": "invoices", "endpoint": {"path": "accounts/{slug}/invoices.json", "data_selector": "invoices"}}
        ],
    }
    yield from rest_api_resources(config)


def get_data() -> None:
    pipeline = dlt.pipeline(
        pipeline_name="fakturoid_pipeline",
        destination="duckdb",
        dataset_name="fakturoid_data",
    )
    load_info = pipeline.run(fakturoid_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("fakturoid_pipeline").dataset()
sessions_df = data.expenses.df()
print(sessions_df.head())

SQL (DuckDB example):

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SELECT * FROM fakturoid_data.expenses LIMIT 10;

In a marimo or Jupyter notebook:

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import dlt

data = dlt.pipeline("fakturoid_pipeline").dataset()
data.expenses.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 Fakturoid 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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Troubleshooting

Authentication errors

If the Authorization header is missing or the token is invalid, the API returns a 4xx response with JSON like {"error":"invalid_request","error_description":"..."}. Token requests to /oauth/token must include HTTP Basic authentication; a missing User-Agent header results in a 400 Bad Request.

Rate limits and maintenance

Search endpoints and the API may return 503 Service Unavailable during maintenance or high load. Implement retry/back‑off logic. Pagination uses a page query parameter with 40 records per page.

Validation and 422 errors

Validation errors return 422 Unprocessable Content with a body {"errors": {"field": ["message"]}}. Other errors use the {"error": "code", "error_description": "human message"} format.

Ensure that the API key is valid to avoid 401 Unauthorized errors. Also, verify endpoint paths and parameters to avoid 404 Not Found errors.

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Next steps

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

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

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dlt ai toolkit data-exploration install
dlt ai toolkit dlthub-runtime install

• 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