This project just helps you get data from the major energy markets. Currently PJM Public reports are supported. Also - there is no 'secret-sauce' in here that you cannot glean from market documentation.

After making this an installable PIP package, the future simply entails pulling all documents from all markets and then providing a simple consumer that will convert the response into a dataframe or dictionary for easy loading into backend systems.

pip install python-isodata

https://python-isodata.readthedocs.io/en/latest/

Your credential should look like this, and if required, your Certificate needs to be supplied just as two file paths would be to a requests post or get.

{
  "user": "caffeinelab",
  "credentials":
  {
    "pjm":
    {
      "username": "***USERNAME***",
      "password": "***PASSWORD***"
    },    
    "ercot_public_api":
      {
        "username": "***USERNAME***",
        "password": "***PASSWORD***",
        "primary_key": "***API_PRIMARY_KEY***",
        "auth_url": "https://ercotb2c.b2clogin.com/ercotb2c.onmicrosoft.com/B2C_1_PUBAPI-ROPC-FLOW/oauth2/v2.0/token?username={username}&password={password}&grant_type=password&scope=openid+fec253ea-0d06-4272-a5e6-b478baeecd70+offline_access&client_id=fec253ea-0d06-4272-a5e6-b478baeecd70&response_type=id_token"
      }
  }
}

ERCOT User Guide:

https://developer.ercot.com/applications/pubapi/user-guide/registration-and-authentication/

market_day is magical?

If you pass it as a string it will be converted into a datetime and if you forget it altogether it just becomes datetime.utc_now(). As a side note - remember that if you are using .isoformat(), you'll want to replace the microseconds with 0 before submitting to the API.

from pathlib import Path
from isodata import Session

pjm = Session('pjm')
pjm.authorize(username=creds['credentials']['pjm']['username'],
              password=creds['credentials']['pjm']['password'],
              certificate=(path_cert, path_key))

for fp in Path('./isodata/pjm/query').glob('*.py'):
    logger.info(fp.name.replace('.py', ''))
    report = pjm.query(report=fp.name.replace('.py', ''))
    if report is not None:
        logger.debug(report[:120])

                  

it is on the client to procure appropriate credentials and possible NAESB approved certificate for connecting to the market API(s).

More information can be found on the PJM website:

https://www.pjm.com/markets-and-operations/etools/markets-gateway

https://www.pjm.com/-/media/etools/security/pki-faqs.ashx

https://www.pjm.com/-/media/etools/security/pki-authentication-guide.ashx

https://www.pjm.com/-/media/etools/markets-gateway/external-interface-specification-guide.ashx

While PJM does publish a wsdl (in a word doc) it hasn't been updated since 2016, this along with there being no true service on the backend allows us to bypass more complicated libraries for submitting simple requests for reports. Because of this, the majority of pjm queries are just simple string builders with some simple token replacements. If you want/need to use LXML to create your request, there is an example in pjm.query.QueryBidNodes

Important - ERCOT throttles API usage, it is described as 30 API Calls per minute so you may find yourself with 4xx errors from the service and then stuck waiting out the time. For simplicity, setting the throttle for 1 call per 2 seconds works well enough. More aggressive strategies may gain a bit of performance. Finally, the rate limit appears to be on the account, so be aware of this when pulling multiple reports, and yes, you probably can do what you are thinking to get around it.

For a list of all Public Reports, refer to the ERCOT api-specs repo

https://github.com/ercot/api-specs/blob/main/pubapi/pubapi-apim-api.json

from isodata.sessions import Session

ercot = Session('ercot_public')
ercot.authorize(username=creds['credentials']['ercot_public_api']['username'],
                password=creds['credentials']['ercot_public_api']['password'],
                primary_key=creds['credentials']['ercot_public_api']['primary_key'],
                auth_url=creds['credentials']['ercot_public_api']['auth_url'])

# Fetch 'SCED Shadow Prices and Binding Transmission Constraints'
emil = 'NP6-86-CD'

# Fetch the list of documents on the first page
report_list, count = ercot.fetch_listing(emil_id=emil, page=1)

# Fetch the first file and save it locally, the 2nd element
# in the tuple is the link to the report.
data_file = ercot.fetch_url(report_list[0][2], 'path/to/save/report')

# Do what you want with the data in the file from here.
# Beware of zips with multiple files, or data_files that 
# are just plain .csv files.  An example for NP6-86-CD data is:
df = pd.read_csv(data_file, compression='zip')

The session now supports a parameter for setting the log level. The default is for no logging messages to be displayed. Use the name of the log level to set the minimum level to display to stdout.

# Example stdout logging
ercot = Session('ercot_public', loglevel='INFO')

PyPi published for simple PIP installation.

Caffeine Lab will publish more tools for energy traders at:

https://caffeinelab.com/mining-energy-data.html

Energy Market Montitor will publish some simple reports with data retrieved by python-isodata.

ERCOT Constraints will publish some simple reports with data retrieved by python-isodata.