Start with the Python SDK

python -m pip install secapi-client
export SECAPI_API_KEY="secapi_..."

from secapi_client import SecApiClient, SecApiError

client = SecApiClient()

try:
    filing = client.agent_latest_filing(ticker="AAPL", form="10-K")
    print({
        "accessionNumber": filing.get("accessionNumber"),
        "filingDate": filing.get("filingDate"),
        "filingUrl": filing.get("filingUrl"),
        "requestId": filing.get("requestId"),
    })
except SecApiError as error:
    print({"status": error.status, "code": error.code, "requestId": error.request_id})
    raise

python first_request.py