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FousHydro One myAccount

Pull your Hydro One interval data into your own systems

Read hourly Meter Data, facility comparisons and your billing and consumption history from Hydro One myAccount with one API call each. On the 3rd of each month, a workflow can compare every facility's kWh, kW and power factor and flag those below 90%.

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Works with your own Hydro One myAccount account. Fous is an independent product.

What you can build on Hydro One myAccount

  • Get hourly meter data

    Build this

    Reads the Meter Data page of the Interval Data Portal, under My Energy Usage, for one data source and date range.

    Takes
    Data source (account and meter), from date, to date, data type (subhourly, hourly, daily or monthly)
    Returns
    Interval start, kWh, kW, kVA, power factor, status (Actual or Estimated)

  • Compare facilities over a period

    Build this

    Reads Compare by Meter / Facility in the Interval Data Portal for several data sources across your accounts.

    Takes
    Data sources, from date, to date, adjusted or unadjusted kWh
    Returns
    Location, account number, kWh, kW_ADJ, kW, kVA, power factor

  • Get billing and consumption history

    Build this

    Uses the Green Button icon below Account Strength in myAccount to read up to 24 months of billing, consumption and transaction data.

    Takes
    Account number, months (up to 24)
    Returns
    Billing period, consumption in kWh, billed amount, transactions with date and amount

  • Give a colleague access to service points

    Build this

    Opens User Delegations in the Interval Data Portal, adds a New Delegation for an email address, the service points and an expiry date.

    Takes
    Delegate email address, service points, expiry date
    Returns
    Email address, service points, expiry date, status

Automate Hydro One myAccount with a workflow

A workflow runs your methods as one process, with nobody at the screen. A schedule or a call from your own system starts it, the steps run in order, and the result arrives in your inbox or in the systems you already use.

  • Estimated hours and peaks, per facility

    Build this
    Starts
    Every weekday at 8:00, for the day two days back
    Step 1
    For each facility you name, get hourly meter data for the day two days back.
    Step 2
    Keep the hours with status Estimated and the hour with the highest kW.
    Step 3
    Email you one line per facility with its peak kW, the hour of the peak and any estimated hours.

  • Last month's facility comparison, on the 3rd

    Build this
    Starts
    Monthly on the 3rd at 7:00, once the previous month's data is in
    Step 1
    Compare all your facilities for the previous month by kWh, kW, kVA and power factor.
    Step 2
    Flag the facilities with power factor below 90% and rank all of them by kW.
    Step 3
    Post the table to your energy management system's webhook.

  • New billing periods, handed to accounting

    Build this
    Starts
    Every Monday at 9:00
    Step 1
    For each account you name, get the billing and consumption history for the last 3 months.
    Step 2
    Keep the billing periods that were not there on the last run.
    Step 3
    Post account number, billing period, kWh and billed amount to your accounting system's webhook.

You can run a workflow by hand on every plan, Free included. Schedules and webhook triggers come with the paid plans, from $29 a month.

Once built, one call from your code

Once you have built a method, it is one POST to /v1/runs from your backend, or a tool an AI agent calls over MCP. This is what “Get hourly meter data” would look like.

Example request
curl https://api.fous.com/v1/runs \
  -H "Authorization: Bearer $FOUS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "method": "hydroone.com/get_hourly_meter_data",
    "input": {
      "data_source": "Meter Data - 70418823",
      "from": "2026-11-09",
      "to": "2026-11-09",
      "data_type": "Hourly"
    }
  }'
Example response
{
  "status": "completed",
  "data": {
    "location": "120 Northwind Rd Barrie ON",
    "account_number": "300418827715",
    "data_source": "Meter Data - 70418823",
    "intervals": [
      {
        "start": "2026-11-09T08:00:00-05:00",
        "kwh": 81.42,
        "kw": 81.42,
        "kva": 88.1,
        "power_factor": 0.92,
        "status": "A"
      }
    ],
    "count": 1
  }
}

An example with invented data, not a ready-made endpoint. The method exists in your organization once you build it, and its name, inputs and fields follow your request.

Hydro One myAccount’s own options

Hydro One offers no API for account holders. Green Button Connect My Data shares usage data with third-party vendors that apply to Hydro One and that you authorize. You can download up to 24 months of billing, consumption and transaction data as XML, and the Interval Data Portal emails scheduled PDF or CSV reports.

OptionWhat it coversWhat it takes
Green Button Connect My DataOngoing sharing of your energy usage data with a third-party app, until you revoke it.A vendor that has applied to Hydro One and accepted its terms, and your own authorization in myAccount.
Green Button Download My DataUp to 24 months of billing, consumption and transaction data in the Green Button XML format.A myAccount profile. The icon is below Account Strength.
Interval Data Portal reportsSaved reports from any page, scheduled daily, weekly or monthly and emailed as PDF or CSV. Most pages export to Excel.A myAccount profile linked to your accounts, through My Energy Usage.
Hydro One myAccount by handBills, payments, paperless billing and My Energy Usage, one account at a time after you pick it at sign-in.A myAccount profile with an email address and password.

Read on November 12, 2026: Green Button at Hydro One, Green Button third-party apps, Interval Data Portal user guide.

Signing in to Hydro One myAccount

Hydro One myAccount signs you in with your email address and a password, and after 5 failed attempts the profile is locked for a while. With Fous you sign in once through myAccount's own sign-in with your own profile: the login is sealed with AES-256, code and AI agents never see it, and an expired session is signed back in.

Worth knowing

Interval data can be up to 48 hours behind
Hydro One reads its interval meters on a 48 hour schedule. For a report on the previous month, Hydro One's guide says to run it on the 3rd day or later.
One account in myAccount, all in the portal
With several accounts, myAccount asks you to pick one at sign-in, while the Interval Data Portal shows all linked accounts and meter points. Adding another account to your profile goes through Hydro One.
Subhourly needs the Meter Data source
Billing Data can be adjusted or unadjusted for losses and may combine meter points. Subhourly intervals are only there on a Meter Data source, and Meter Data and Summary show one data source at a time.
Delegations expire
A User Delegation can cover single accounts or meter points and has an expiry date, 3 months by default. It ends on its own if the delegating user moves out of the account.

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Frequently asked questions

Not for account holders. Green Button Connect My Data lets third-party vendors that have applied to Hydro One read your usage once you authorize them. You can download up to 24 months of billing, consumption and transaction data as Green Button XML, and schedule CSV or PDF reports from the Interval Data Portal.

Open My Energy Usage in myAccount to reach the Interval Data Portal, pick a data source on Meter Data or Compare by Time and export it to Excel. Create Report saves the selection and can email it as CSV or PDF daily, weekly or monthly.

Hydro One reads its interval meters on a 48 hour schedule, so data in the portal can be up to 48 hours behind. Hovering over a point shows whether it is Actual (A) or Estimated (E).

Yes, in the Interval Data Portal, where the Summary page lists your data sources with their most recent bill period, kWh, kW, kVA and power factor. Customers with four or more accounts under the same name can also get Summary Billing, one summary bill with a bill per account.

No. Fous is an independent product. You use it with your own Hydro One myAccount profile, and a method reads and does only what that profile can.

Put Hydro One myAccount behind an API call

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Fous is an independent product: it is not affiliated with, endorsed by or sponsored by the operator of Hydro One myAccount (Hydro One). The name is used only to say which system this page is about. Something here wrong or out of date? Write to legal@fous.com.