Modern Treasury - Main API Python API Docs | dltHub

Modern Treasury is a payment operations platform that provides APIs to create, manage, and reconcile payment orders, payment actions and payment references. The REST API base URL is https://api.moderntreasury.com and All requests require an API key provided as a Bearer token in the Authorization header..

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 Modern Treasury - Main API data in under 10 minutes.

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What data can I load from Modern Treasury - Main API?

Here are some of the endpoints you can load from Modern Treasury - Main API:

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How do I authenticate with the Modern Treasury - Main API API?

Modern Treasury uses API keys. Provide the secret key in the Authorization header as Bearer <secret_key> or use HTTP Basic auth with the secret key as the username and an empty password.

1. Get your credentials

1. Sign into the Modern Treasury dashboard. 2) Navigate to Developers → API Keys. 3) Click Create new API key or copy an existing secret key (it starts with mt_). 4) Use this secret key as a Bearer token in the Authorization header or as the username for HTTP Basic auth.

2. Add them to .dlt/secrets.toml

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[sources.modern_treasury_source]
api_key = "your_modern_treasury_secret_key"

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 Modern Treasury - Main API 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 modern_treasury_pipeline.py

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

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Pipeline modern_treasury_pipeline load step completed in 0.26 seconds
1 load package(s) were loaded to destination duckdb and into dataset modern_treasury_data
The duckdb destination used duckdb:/modern_treasury.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 modern_treasury_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 payment_orders and payment_actions from the Modern Treasury - Main API 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 modern_treasury_source(api_key=dlt.secrets.value):
    config: RESTAPIConfig = {
        "client": {
            "base_url": "https://api.moderntreasury.com",
            "auth": {
                "type": "bearer",
                "token": api_key,
            },
        },
        "resources": [
            {"name": "payment_orders", "endpoint": {"path": "payment_orders", "data_selector": "data"}},
            {"name": "payment_actions", "endpoint": {"path": "payment_actions", "data_selector": "data"}}
        ],
    }
    yield from rest_api_resources(config)


def get_data() -> None:
    pipeline = dlt.pipeline(
        pipeline_name="modern_treasury_pipeline",
        destination="duckdb",
        dataset_name="modern_treasury_data",
    )
    load_info = pipeline.run(modern_treasury_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("modern_treasury_pipeline").dataset()
sessions_df = data.payment_orders.df()
print(sessions_df.head())

SQL (DuckDB example):

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SELECT * FROM modern_treasury_data.payment_orders LIMIT 10;

In a marimo or Jupyter notebook:

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import dlt

data = dlt.pipeline("modern_treasury_pipeline").dataset()
data.payment_orders.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 Modern Treasury - Main API 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

• 401 Unauthorized – The provided API key is missing, malformed, or invalid. The response contains an errors array describing the problem.

Permission Errors

• 403 Forbidden – The API key does not have permission to access the requested resource.

Not Found

• 404 Not Found – The requested resource ID does not exist.

Validation Errors

• 422 Unprocessable Entity – The request payload fails validation (e.g., missing required fields). Details are returned in the errors array.

Rate Limiting

• 429 Too Many Requests – Too many requests have been sent in a short time window. Retry after the time indicated in the Retry-After header.

Pagination Quirks

• List endpoints use cursor‑based pagination with after, before, and limit query parameters. The meta object in the response contains cursor values for the next/previous pages.

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