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Technical Interfaces

This page contains information about the current technical interfaces with IESO's market systems. These interfaces are categorized by the functions performed by the IESO and/or market participants. Choose a functional area below to see all relevant documents.

Upcoming changes to these interfaces are listed on the Pending Changes page. Procedural information for each function is included in the Market Rules & Manuals Library

 


    Security

    IESO Java policy file

    This revised Java policy file, which replaces the previous existing policy files, contains additional security settings to enable use of the new Verizon CA. The previous java policy files are no longer available as they do not meet IESO MPI java security requirements. The Java policy file must be installed on a user’s workstation for successful login and use of the Market Participant Interface (MPI) when using Internet Explorer browser. Without this file, login to the MPI will be unsuccessful. Further instructions for installing the policy file can be accessed here.
    Last UpdatedMarch 2, 2016
    DocumentPOL

    Market Participant Submissions

    Market Participant Client Platform Information Technology Standard (IESO_ISTD_0017)

    This document is intended to clearly and concisely present the standards and guidelines for the upgrade of the Market Participant Client Platform
    Last UpdatedMarch 5, 2007
    Documentpdf

    Physical Market Bids (RTEM) (IMO_TPL_0028)

    This template is used to specify the bids or offers for various resources like generators, loads, off-takes and injections.
    Last UpdatedJune 1, 2005
    Sampletext
    Templatepdf

    Physical Market Standing Bids (RTEM)

    This template is used to specify the standing bids or offers for various resources like generators, loads, off-takes and injections.
    Last UpdatedJune 1, 2005
    Sampletext
    Templatepdf

    Physical Market Schedules (IMO_TPL_0029)

    This template is used to specify the schedules for various resources.
    Last UpdatedJune 1, 2005
    Sampletext
    Templatepdf

    Physical Market Standing Schedules

    This template is used to specify the standing schedules for various resources.
    Last UpdatedJune 1, 2005
    Sampletext
    Templatepdf

    Operating Reserve Valid Bids (IMO_TPL_0016)

    This template is used to send Operating Reserve Offer/Bid data to the IESO.
    Last UpdatedJune 1, 2005
    Sampletext
    Templatepdf

    Operating Reserve Standing Bids

    This template is used to send standing Operating Reserve Offer/Bid data to the IESO.
    Last UpdatedJune 1, 2005
    Sampletext
    Templatepdf

    Bilateral Contracts (IMO_TPL_0030)

    This template is used to specify the hourly amount exchanged between parties to the bilateral contract.
    Last UpdatedJune 1, 2005
    Sampletext
    Templatepdf

    Bilateral Standing Contracts

    This template is used to specify the hourly amount exchanged between parties to the bilateral contract.
    Last UpdatedJune 1, 2005
    Sampletext
    Templatepdf

    Validation Rules/Message and Abbreviations

    This document, which is in DRAFT form, describes: the validation rules; the messages returned as a result of the validations; and abbreviations used in data submission templates.
    Last UpdatedJune 1, 2005
    SampleN/A
    Templatepdf

    IESO Developers Kit (IDK) Implementation Manual (IMO_MAN_0023)

    This document describes the functionality of the MIM programmatic application interface that enables programmatic bid and offer submission functionality for the Energy Markets.. (i.e. use of the MIM API).
    Last UpdatedMarch 7, 2012
    Documentpdf

    Market Information Management Application Interface (IDK)

    This signed IESO Developers Kit provides the programmatic API to submit/download MIM data using CSV data files. This version of the API works with either UserID/Password or Digital Certificate.
    Last UpdatedOctober 12, 2011
    DocumentZIP

    Market Information Management Application Interface (Web Services)

    This signed IESO MIM Web Services provides the programmatic API to submit/download MIM data using SOAP based web services. This version of the API requires two part of authentication: UserID/Password and whitelisted client machine IP address.
    Last UpdatedAugust 11, 2016
    DocumentZIP WSDL XSD

    Outage Management

    Web Service Design Specification (SPEC-113)

    StatusNew
    This document provides the design specification for Outage Coordination and Scheduling System (OCSS) web service.
    Last UpdatedOctober 26, 2016
    Documentpdf

    Planned Transmission Outages Report

    This report shows the future transmission outages for various time frames; daily, monthly and six-monthly.

    The following sets of reports are made available to participants:

    • Daily reports until the end of the next month;
    • Monthly reports for the following six months;
    • 6-monthly reports available for the following year.
    Last UpdatedSeptember 25, 2002
    Publishing FrequencyDaily
    Report PeriodDay, month, 6-month
    Samplehtml; csv
    TemplateN/A

    Historical Transmission Outage Report

    This report lists the outages that have occurred or were in-progress for the previous hour.
    Last UpdatedAugust 28, 2002
    Publishing FrequencyHourly
    Report PeriodPrevious 1 hour
    Samplehtml;csv
    TemplateN/A

    Market Participant Requests

    Four Hour Predispatch Operating Reserve Market Information Report

    This report is identical in structure to the Operating Reserve Predispatch Report (MP specific). It will only contain predispatch results for the next 4 hours and will be produced before the same report for the full predispatch timeframe. When the 4 hour period crosses a day boundary, a separate report will be generated for each day.
    Last UpdatedDecember 21, 2001
    Sampletext
    Templatepdf

    Physical Market RTEM Valid Bids (IMO_TPL_0028)

    This template is used to retrieve the bids or offers for various resources like generators, loads, offtakes and injections.
    Last UpdatedJune 5, 2006
    Sampletext
    Templatepdf

    Physical Market RTEM Valid Standing Bids

    This template is used to retrieve standing bids or offers for various resources like generators, loads, offtakes and injections.
    Last UpdatedJune 5, 2006
    Sampletext
    Templatepdf

    Physical Market Energy (Bid) Summary

    This template is used to provide a market participant with a summary of their resources for which there are active bids.
    Last UpdatedOctober 12, 2001
    Sampletext
    Templatepdf

    Physical Market Schedules Valid Bids (IMO_TPL_0029)

    This template is used to retrieve the schedules for various resources.
    Last UpdatedJune 1, 2005
    Sampletext
    Templatepdf

    Physical Market Schedules Valid Standing Bids

    This template is used to retrieve standing schedules for various resources.
    Last UpdatedJune 1, 2005
    Sampletext
    Templatepdf

    Physical Market Schedules (Bid) Summary

    This template is used to provide a market participant with a summary of their resources for which there are active schedules.
    Last UpdatedOctober 12, 2001
    Sampletext
    Templatepdf

    Operating Reserve Valid Bids

    This template is used to retrieve Operating Reserve Offer/Bid data.
    Last UpdatedJune 5, 2006
    Sampletext
    Templatepdf

    Operating Reserve Valid Standing Bids

    This template is used to retrieve standing Operating Reserve Offer/Bid data
    Last UpdatedJune 5, 2006
    Sampletext
    Templatepdf

    Physical Market Bilateral Valid Bids

    This template is used to retrieve hourly amount exchanged between parties to the bilateral contract.
    Last UpdatedJune 1, 2005
    Sampletext
    Templatepdf

    Physical Market Bilateral Valid Standing Bids

    This template is used to retrieve standing hourly amount exchanged between parties to the bilateral contract.
    Last UpdatedJune 1, 2005
    Sampletext
    Templatepdf

    Physical Market Bilateral Contract (Bid) Summary

    This template is used to provide a market participant with a summary of their resources for which there are active bilateral contracts.
    Last UpdatedNovember 21, 2001
    Sampletext
    Templatepdf

    Physical Market Predispatch Report

    This report provides pre-dispatch energy schedule information for each hour of the forecast period
    Last UpdatedSeptember 26, 2001
    Sampletext
    Templatepdf

    Physical Market Dispatch Constrained Hourly Report (IESO_TPL_0035)

    This report contains energy dispatch schedules for each 5-minute interval of a particular hour.
    Last UpdatedJune 5, 2006
    Sampletext
    Templatepdf

    Physical Market Dispatch Unconstrained Hourly Report

    This report contains the energy Market Schedule for each 5-minute interval of a particular hour; i.e., the dispatch schedule in the absence of system constraints
    Last UpdatedDecember 21, 2001
    SampleN/A
    Templatepdf

    Physical Market Dispatch 5-minute Report (IESO_TPL_0033)

    This 5-Minute Dispatch Schedule Report contains preliminary information on facility dispatch schedules for a particular 5-minute scheduling interval. These schedules are subject to change.
    Last UpdatedJune 5, 2006
    Sampletext
    Templatepdf

    Operating Reserve Predispatch Report

    This template is used to retrieve Operating Reserve Offer/Bid data.
    Last UpdatedSeptember 26, 2001
    SampleTo be provided
    Templatepdf

    Operating Reserve Dispatch Constrained Hourly Report (IESO_TPL_0036)

    This report contains dispatch schedules for Operating Reserve for each 5-minute interval of a particular hour.
    Last UpdatedJune 5, 2006
    Sampletext
    Templatepdf

    Operating Reserve Dispatch Unconstrained Report

    This report contains the Operating Reserve Market Schedule for each 5-minute interval of a particular hour; i.e., the dispatch schedule in the absence of system constraints.
    Last UpdatedDecember 21, 2001
    SampleN/A
    Templatepdf

    Operating Reserve Dispatch 5-minute Report (IESO_TPL_0034)

    This 5-Minute Dispatch Schedule Report contains preliminary information on facility dispatch schedules for a particular 5-minute scheduling interval. These schedules are subject to change.
    Last UpdatedJune 5, 2006
    Sampletext
    Templatepdf

    Operating Reserve (Bid) Summary

    This template is used to provide a market participant with a summary of their resources for which there are active Operating Resource bids.
    Last UpdatedSeptember 26, 2001
    Sampletext
    Templatepdf

    Four Hour Predispatch Energy Market Information Report

    This report is identical in structure to the Physical Market Predispatch Report (MP specific). It will only contain predispatch results for the next 4 hours and will be produced before the same report for the full predispatch timeframe. When the 4 hour period crosses a day boundary, a separate report will be generated for each day.
    Last UpdatedDecember 21, 2001
    Sampletext
    Templatepdf

    Market Results

    Multi-Interval Optimization, Functional Requirements (IMO_REQ_0048)

    This document defines the functional requirements and current settings for Multi-Interval Optimization
    Last UpdatedJune 1, 2005
    Documentpdf

    Operating Reserve Predispatch Unconstrained Report for OR in the Market

    This report provides unconstrained pre-dispatch Operating Reserve schedule information for OR in the Market
    Last UpdatedJuly 25, 2003
    Publishing FrequencyHourly
    Report PeriodDispatch Day
    Samplecsv
    Templatepdf

    Operating Reserve Predispatch Constrained Report for OR in the Market

    This report provides constrained pre-dispatch Operating Reserve schedule information for OR in the Market
    Last UpdatedJuly 25, 2003
    Publishing FrequencyHourly
    Report PeriodDispatch Day
    Samplecsv
    Templatepdf

    Operating Reserve Dispatch Constrained Hourly Report for OR in the Market

    This report contains dispatch schedules for Operating Reserve in the Market for each 5-minute interval of a particular hour.
    Last UpdatedJuly 25, 2003
    Publishing FrequencyHourly
    Report PeriodDispatch Hour
    Samplecsv
    Templatepdf

    Operating Reserve Dispatch Unconstrained Report for OR in the Market

    This report contains the Operating Reserve Market Schedule for each 5-minute interval of a particular hour for OR in the market; i.e., the dispatch schedule in the absence of system constraints
    Last UpdatedJuly 25, 2003
    Publishing FrequencyHourly
    Report PeriodDispatch Hour
    Samplecsv
    Templatepdf

    Predispatch Unconstrained Energy Price Report

    This report provides market clearing price (MCP) energy and Operating Reserve for all zones for each hour of the forecast period
    Last UpdatedDecember 21, 2001
    Publishing FrequencyHourly
    Samplecsv
    Templatepdf

    Dispatch Unconstrained Energy Price Report

    This report provides the Market Clearing Price for energy and Operating Reserve, for all zones, for each 5 minute interval of the hour.
    Last UpdatedDecember 21, 2001
    Publishing Frequency5 min
    Samplecsv
    Templatepdf

    Predispatch Unconstrained Totals Report

    This report provides a forecast of expected load, available energy, Operating Reserve requirements, and losses for each hour of the forecast period as established by the unconstrained predispatch run of the algorithm.
    Last UpdatedSeptember 26, 2001
    Publishing FrequencyHourly
    Samplecsv
    Templatepdf

    Predispatch Constrained Totals Report (IESO_TPL_0045)

    This report provides a forecast of expected load, available energy, Operating Reserve requirements, and losses for each hour of the forecast period as established by the constrained predispatch run of the algorithm.
    Last UpdatedMarch 7, 2007
    Publishing FrequencyHourly
    Samplecsv
    Templatepdf

    Dispatch Unconstrained Totals Report (IESO_TPL_0046)

    This report provides the total energy and Operating Reserve scheduled as well as the market demand as established by the unconstrained dispatch run of the algorithm, for each 5 minute interval of the hour.
    Last UpdatedMarch 7, 2007
    Publishing FrequencyHourly
    Samplecsv
    Templatepdf

    Dispatch Area Operating Reserve Shortfalls

    This report contains Operating Reserve shortfalls, in five-minute intervals, for the previous dispatch hour for each dispatch area.
    Last UpdatedApril 9, 2002
    Publishing FrequencyHourly
    Samplehtml; csv
    TemplateN/A

    Dispatch Area Operating Reserve and Energy Called from Operating Reserve

    This report contains both scheduled and utilized Operating Reserve for the previous dispatch hour, by dispatch area.

    Last UpdatedSeptember 10, 2003
    Publishing FrequencyHourly
    Samplehtml; csv
    TemplateN/A

    Predispatch Area Operating Reserve Shortfalls

    This report contains Operating Reserve shortfalls in each hour for a pre-dispatch day, by dispatch area.
    Last UpdatedApril 9, 2002
    Publishing FrequencyHourly
    Samplehtml; csv
    TemplateN/A

    Dispatch Constrained Totals Report

    This report provides the total energy and Operating Reserve scheduled as well as the market demand as established by the constrained dispatch run of the algorithm, for each 5 minute interval of the hour.
    Last UpdatedMarch 27, 2002
    Publishing FrequencyHourly
    Samplecsv
    TemplateN/A

    Predispatch Unconstrained Regional Constraints Report

    This report contains the intertie scheduling limits used as inputs to the unconstrained run of the predispatch algorithm.
    Last UpdatedSeptember 26, 2001
    Publishing FrequencyHourly
    Samplecsv
    Templatepdf

    Predispatch Constrained Regional Constraints Report

    This report contains the area Operating Reserve constraints and intertie scheduling limits used as inputs to the constrained run of the predispatch algorithm.
    Last UpdatedSeptember 26, 2001
    Publishing FrequencyHourly
    Samplecsv
    Templatepdf

    Dispatch Unconstrained Regional Constraints Report

    This report contains the intertie scheduling limits between Ontario and neighbouring control areas produced by the real time unconstrained run of the algorithm, for each 5 minute interval of the hour.
    Last UpdatedDecember 21, 2001
    Publishing FrequencyHourly
    Samplecsv
    Templatepdf

    Dispatch Constrained Regional Constraints Report

    This report contains the intertie scheduling limits between Ontario and neighbouring control areas and the internal Operating Reserve Constraints produced by the real time constrained run of the algorithm, for each 5 minute interval of the hour.
    Last UpdatedDecember 21, 2001
    Publishing FrequencyHourly
    Samplecsv
    Templatepdf

    Predispatch Security Constraints Report (IMO_TPL_0017)

    This report contains a list of binding security constraints for the predispatch run of the algorithm.
    Last UpdatedDecember 5, 2002
    Publishing FrequencyHourly
    Samplehtml; csv
    Templatepdf

    Dispatch Security Constraints Report (IMO_TPL_0018)

    This report contains a list of binding security constraints for the dispatch run of the algorithm, for each 5 minute interval of the hour.
    Last UpdatedDecember 5, 2002
    Publishing FrequencyHourly
    Samplehtml; csv
    Templatepdf

    Predispatch Constrained Shadow Prices Report

    This report contains pre-dispatch Shadow Prices at selected nodes within Ontario.
    Last UpdatedMarch 11, 2002
    Publishing FrequencyHourly
    Samplecsv
    Templatepdf

    Dispatch Constrained Shadow Prices Report

    This report contains dispatch Shadow Prices at selected nodes within Ontario, for each 5 minute interval of the hour.
    Last UpdatedMarch 11, 2002
    Publishing FrequencyHourly
    Samplecsv
    Templatepdf

    Dispatch Unconstrained Energy HOEP Price Report

    This report displays the Hourly Ontario Energy Price for each preceding hour of the day.
    Last UpdatedDecember 21, 2001
    Publishing FrequencyHourly
    Samplecsv
    Templatepdf

    Dispatch Unconstrained Price Disaggregation Report

    This report provides each 5-minute price disaggregated for both Energy and Operating Reserve for all zones for each preceding hour of the day.
    Last UpdatedJanuary 24, 2002
    Publishing FrequencyHourly
    Samplecsv
    Templatepdf

    Dispatch Deviation Monthly Report

    Subject to Market Rule, Ch. 7, sec. 4.2.2 and sec 4.2.3 this report summarizes the number of occurrences where the IESO has deviated significantly from the results of the dispatch algorithm, the action taken and the rationale for doing so. An occurrence may cover one or more intervals and all occurrences recorded in the IESO Shift Operations log are considered significant.
    Last UpdatedJuly 4, 2002
    Publishing FrequencyMonthly
    Samplehtml
    TemplateN/A

    Intertie Schedules and Flow Report Schema

    Sample file intended to allow report users to set up their XML parser for receiving the Intertie Schedules and Flow report. Refer also to shared schemas.
    Last UpdatedOctober 3, 2003
    Samplexsd

    Generator Output and Capability Report Schema

    Sample file intended to allow report users to set up their XML parser for receiving the Generator Output and Capability report. Refer also to shared schemas.
    Last UpdatedDecember 10, 2003
    Samplexsd

    Hourly Ontario Energy Price (HOEP) Report Schema

    Sample file intended to allow report users to set up their XML parser for receiving the Hourly Ontario Energy Price (HOEP) report. Refer also to shared schemas.
    Last UpdatedDecember 10, 2003
    Samplexsd

    Dispatch Advisory Report Schema

    Sample file intended to allow report users to set up their XML parser for receiving the Dispatch Advisory report. Refer also to shared schemas.
    Last UpdatedJune 23, 2004
    Samplexsd

    DACP Predispatch Energy Report Schema

    Sample file intended to allow report users to set up their XML parser for receiving the DACP Predispatch Energy report. Refer also to shared schemas.
    Last UpdatedJune 7, 2006
    Samplexsd

    DACP Predispatch Prices Report Schema

    Sample file intended to allow report users to set up their XML parser for receiving the DACP Predispatch Prices report. Refer also to shared schemas.
    Last UpdatedJune 7, 2006
    Samplexsd

    DACP Adequacy Report Schema

    Sample file intended to allow report users to set up their XML parser for receiving the DACP Adequacy report. Refer also to shared schemas.
    Last UpdatedJune 7, 2006
    Samplexsd

    DACP Reliability Commitment Report Schema

    Sample file intended to allow report users to set up their XML parser for receiving the DACP Reliability Commitment report. Refer also to shared schemas.
    Last UpdatedJune 7, 2006
    Samplexsd

    DACP Commitments Report Schema

    Sample file intended to allow report users to set up their XML parser for receiving the DACP Commitments report. Refer also to shared schemas.
    Last UpdatedJune 7, 2006
    Samplexsd

    DACP Check Source/ADE Report Schema

    Sample file intended to allow report users to set up their XML parser for receiving the DACP Check Source/ADE report. Refer also to shared schemas.
    Last UpdatedJune 7, 2006
    Samplexsd

    Financially Binding Status

    Sample file intended to allow report users to set up their XML parser for receiving the DACP Financially Binding Status report. Refer also to shared schemas.
    Last UpdatedAugust 17, 2006
    Samplexsd

    Adequacy

    Sample file intended to allow report users to set up their XML parser for receiving the Adequacy report. Refer also to shared schemas.
    Last UpdatedFebruary 19, 2007
    Samplexsd

    Market Forecasts

    Daily SAA hourly data report (TPL-27)

    This report is used to post Daily System Adequacy and Assessment Report hourly data.
    Last UpdatedFebruary 5, 2014
    Publishing FrequencyDaily
    Report Period12 days
    Samplecsv
    Templatepdf

    SAA daily notes and limitations report (IESO_TPL_0087)

    This report is used to post Daily System Adequacy and Assessment Report Transmission Flowgate Limitations, System Advisories and SAA Notes data.
    Last UpdatedMarch 7, 2012
    Publishing FrequencyDaily
    Report Period12 days
    Samplecsv
    Templatepdf

    SAA daily all data report

    This report is used to post Daily System Adequacy and Assessment Report combined hourly and Transmission Flowgate Limitations, System Advisories and SAA Notes data in an html format.
    Last UpdatedMarch 19, 2002
    Publishing FrequencyDaily
    Report Period12 days
    Samplehtml
    TemplateN/A

    Weekly SAA report (IESO_TPL_0088)

    This report is used to post Weekly System Adequacy and Assessment Report data for public information.
    Last UpdatedFebruary 5, 2014
    Publishing FrequencyDaily
    Report Period35 days
    Samplehtml; csv
    Templatepdf

    Daily SSR hourly data report (IMO_TPL_0022)

    This report is used to post System Status Report hourly data.
    Last UpdatedFebruary 5, 2014
    Publishing FrequencyDaily
    Report Period3 days
    Samplecsv
    Templatepdf

    SSR daily notes and limitations Report (IMO_TPL_0023)

    This report is used to post System Status Report Transmission Flowgate Limitations, SA Notices and SAA Notes data.
    Last UpdatedMarch 7, 2012
    Publishing FrequencyDaily
    Report Period3 days
    Samplecsv
    Templatepdf

    SSR daily all data report

    This report is used to post System Status Report combined hourly and Transmission Flowgate Limitations, System Advisories and SAA Notes data in an html format.
    Last UpdatedMarch 19, 2002
    Publishing FrequencyDaily
    Report Period3 days
    Samplehtml
    TemplateN/A

    Message Exchange

    Web Based Message Exchange, Market Participant's Guide (IMP_MAN_0031)

    This Guide provides Market Participants with the details of how they interact and interface with the Web based message exchange system for receiving dispatch messages
    Last UpdatedSeptember 30, 2013
    Documentpdf

    Dispatch Messaging - ICCP

    Included in the 'Participant Technical Reference Manual'
    Last UpdatedJune 4, 2003
    DocumentN/A

    Web Based Message Exchange API

    Downloadable API for message exchange (refer to User Guide).
    Last UpdatedMarch 7, 2007
    DocumentZIP

    Transmission Rights

    Transmission Rights Auction System - Market Participant User Guide (IMO_GDE_0004)

    This document provides a description of the functionality of the IESO's Transmission Rights Auction which is available to those market participants who have registered to be TR participants.
    Last UpdatedDecember 7, 2011
    Documentpdf

    Transmission Auction Participant Notification Report

    This report contains a TR Participant’s results for a TR auction round. The TR Participant must have participated in a TR auction round specified by placing an accepted bid in order to receive a Participant Notification Report. The report provides notice of what transmission rights, if any, have been awarded and the resultant TR market clearing price. It also lists the round end time and the time structure. A report will be issued, regardless if a TR participant was successful or not.

    The report can be accessed through the Market Participant Interface (MPI).

    Last UpdatedJuly 18, 2001
    Publishing FrequencyWithin 24 hours of auction closing
    Samplehtml

    Transmission Auction Participant Bid History Report

    This report enables a TR participant to view TR bids submitted by them, and their status over the last 18 months. The TR participant must have participated in the TR auction round specified by placing an accepted bid in order to receive the Bid History Report.

    The report can be accessed through the Market Participant Interface (MPI).

    Last UpdatedJuly 18, 2001
    Publishing FrequencyWithin 24 hours of auction closing
    Samplehtml

    Post Auction MCP Report

    This report provides aggregated auction results after the TR auction round has been completed. The report identifies the total number of TRs awarded and the associated TR market clearing price for a particular path in a TR auction round.

    The report will remain visible from the user interface page for thirty days from the TR Auction round completion. The report can be accessed through the IESO Web site.

    Last UpdatedApril 18, 2002
    Publishing FrequencyWithin 24 hours of auction closing
    Samplehtml

    Daily TR Hourly Zonal Price Report

    This report enables you to view, in a daily format, the hourly zonal prices determined by the last projected market price (the zonal price from the last run of the Predispatch Unconstrained schedule) for energy. The report looks backward for 60 days to ensure that any price changes are captured in the report.

    The report can be accessed through the user interface of the IESO Web site for the previous 3 days of data. Data from previous days, up to 12 months into the past, are available from the IESO Reports site.

    Last UpdatedApril 18, 2002
    Publishing FrequencyDaily at 6:30 EST
    Samplehtml

    Monthly TR Hourly Zonal Price Report

    This report enables you to view, in a monthly format, the hourly zonal prices determined by the last projected market price (the zonal price from the last run of the Predispatch Unconstrained schedule) for energy. The report looks backward for 60 days to ensure that any price changes are captured in the report.

    Data from previous days, up to 12 months into the past (or up to Market Commencement), are available and can be accessed via the IESO Reports site.

    Last UpdatedApril 18, 2002
    Publishing FrequencyDaily at 6:30 EST
    Samplecsv

    Daily TR Historical Interface Flow, Schedule and TTC Report

    This report enables you to view, in a daily format, the actual hourly average Schedules and Flows as a result of scheduled and off market transactions between Ontario and an intertie zone. (Negative values denote flows into Ontario)

    The report also enables you to view the Total Transfer Capability (TTC) used for determining the maximum import / export market schedules between Ontario and an Intertie Zone. (TTC IN refers to flows from the external Intertie zone into Ontario). The report looks backward for 60 days to ensure that any price changes are captured in the report.

    This report can be accessed through the user interface of the IESO Web site for the previous 3 days of data. Data from previous days, up to 12 months into the past, are available from the IESO Reports site.

    Last UpdatedApril 18, 2002
    Publishing FrequencyDaily at 6:30 EST
    Samplehtml

    Monthly TR Historical Interface Flow, Schedule and TTC Report

    As with the daily report, this report enables you to view, in a monthly format, the actual hourly average Schedules and Flows as a result of scheduled and off market transactions between Ontario and an intertie zone. The report looks backward for 60 days to ensure that any price changes are captured in the report.

    Data from previous days, up to 12 months into the past (or up to Market Commencement), are available and can be accessed via the IESO Reports site.

    Last UpdatedApril 18, 2002
    Publishing FrequencyDaily at 6:30 EST
    Samplecsv

    Pre Auction MCP Report

    This report enables the TR Participant to view the Market Clearing Price at which each TR sold during all TR auction rounds held in the previous 18 months (or until market opening).

    This report can be accessed through the user interface of the IESO Web site until the start of the TR period of validity.

    Last UpdatedApril 18, 2002
    Publishing FrequencyA minimum of 30 days prior to the TR Auction
    Samplehtml

    Pre Auction TTC Report

    This report enables you to view the forecast of TTC used to determine the number of TRs that will be offered and the maximum number of TRs that may be available. The report also contains a link to the detailed TTC assessments used to identify any assumptions and applicable constraints that can limit the number of TRs that can be awarded.

    This report can be accessed through the user interface of the IESO Web site until the start of the TR period of validity.

    Last UpdatedApril 18, 2002
    Publishing FrequencyA minimum of 30 days prior to the TR Auction
    Samplehtml

    Revenue Metering

    Loss Equations, Administration of Losses (GDE-184)

    This document describes how loss equations (fixed loss factors and loss coefficients) are applied to specific service points within the IESO’s Meter Data Management (MDM) system.
    Last UpdatedJune 1, 2016
    Documentpdf

    Implementation Guide for EDI-867 Meter Data (GDE-139)

    This document describes the EDI-867 meter data file format.
    Last UpdatedSeptember 9, 2015
    Documentpdf

    Importing and Reading the IESO EDI-867 Meter Data File (GDE-140)

    ​This is a new document to describe how to import and read the IESO EDI-867 meter data file.
    Last UpdatedMarch 2, 2016
    Documentpdf

    EDI-867 Sample File 1

    ​This is a new sample file that represents the meter data a market participant can expect to see when an EDI-867 file is produced by the Meter Data Management System and published to the IESO Reports Site.
    Last UpdatedSeptember 9, 2015
    SampleEDI-867 Sample File 1

    EDI-867 Sample File 2 with DTM Flags

    ​This is a new sample file that represents the meter data (with date/time stamps included) a market participant can expect to see when an EDI-867 file is produced by the Meter Data Management System and published to the IESO Reports Site.
    Last UpdatedSeptember 9, 2015
    SampleEDI-867 Sample File 2 with DTM

    Meter Trouble Reporting

    Application Status Tool: A User Guide (IMP_GDE_0103)

    This document is a guide to the use of the Applications Status tool for IESO interactive workflow applications.
    Last UpdatedDecember 7, 2005
    Documentpdf

    Meter Trouble Report: A Guide for Market Participants (IMP_GDE_0098)

    This document is a guide for market participants to the use of the Meter Trouble Report workflow application
    Last UpdatedSeptember 21, 2005
    Documentpdf

    Commercial Reconciliation

    Format Specifications for Settlement Statement Files and Data Files (IMP_SPEC_0005)

    StatusUpdated
    This Technical Interface document describes the format of settlement statement files and supporting data files.
    Last UpdatedDecember 7, 2016
    Documentpdf
    TemplateSee IMDC-37 regarding the "Capacity and Energy Sales Agreements".

    Format Specification for Demand Response Settlement Data Files (SPEC-142)

    StatusNew
    ​The file format specification deals with the data file report that a DR customer may receive.
    Last UpdatedOctober 20, 2016
    Documentpdf

    HST Guide for IESO Transactions (IMO_GDE_0002)

    StatusUpdated
    This document provides an overview of the operation of the HST in the IESO administered markets.
    Last UpdatedDecember 7, 2016
    Documentpdf

    Participant Transmission Tariff Data Files (IMP_SPEC_0006)

    This file format specification deals with the data file that a Transmission Customer may use for the purpose of validating the energy measurements used by the IESO to determine transmission tariff billing demands.
    Last UpdatedSeptember 10, 2008
    Documentpdf

    Transmitter Transmission Tariff Data Files (IMP_SPEC_0007)

    This file format specification deals with the data file that the Ontario transmitters may use for the Purpose of validating the energy measurements Used by the IESO to determine transmission tariff billing demands.
    Last UpdatedSeptember 12, 2012
    Documentpdf

    Transmitter Reconciliation Data File (IMP_SPEC_0008)

    This file format specification deals with the data file required to enable the Ontario transmitters to reconcile the bases for transmission tariff credits.
    Last UpdatedSeptember 10, 2008
    Documentpdf

    Transmission Tariff Peak System Demand Data Report (IMP_REP_0016)

    The Peak System Demand Data Report provides the sum of the hourly measurements across all delivery points defined for transmission network charges for each Trading Date / Hour in the reporting month.
    Last UpdatedSeptember 12, 2012
    Documentpdf

    IESO Charge Types and Equations (IMP_LST_0001)

    StatusUpdated
    This document enumerates the various charge types and equations used in the IESO Settlements process for IESO-Administered markets which are subject to a functional deferral and those that are NOT subject to a functional deferral.
    Last UpdatedDecember 7, 2016
    Documentpdf
    TemplateSee IMDC-36 regarding the "Capacity and Energy Sales Agreements".

    Physical Market Preliminary Statements

    Published on the 10th Business day for each trading day
    Last UpdatedDecember 10, 2008
    Sampletext

    Physical Market Final Statements

    Published on the 20th Business day for each trading day
    Last UpdatedDecember 10, 2008
    Sampletext

    Physical Market Preliminary data file

    Published on the 10th Business day for each trading day
    Last UpdatedJune 9, 2006
    Sampletext

    Physical Market Final data file

    Published on the 20th Business day for each trading day
    Last UpdatedJune 9, 2006
    Sampletext

    Financial Market Preliminary Statements

    Published on the 2nd Business day for each trading day
    Last UpdatedNovember 20, 2000
    Sampletext

    Financial Market Final Statements

    Published on the 6th Business day for each trading day
    Last UpdatedNovember 20, 2000
    Sampletext

    Participant Transmission Tariff Data Files

    Sample of the Transmission Tariff related data files published to market participants and transmitters for reconciliation of Transmission Tariff related charges. These are Published with Preliminary information on the 10th business day after the month end trade date to be followed by a Final edition on the 20th business day.
    Last UpdatedJune 4, 2003
    Sampletext

    Transmitter Transmission Tariff Data File

    Sample of the Transmission Tariff related data files published to market participants and transmitters for reconciliation of Transmission Tariff related charges. These are Published with Preliminary information on the 10th business day after the month end trade date to be followed by a Final edition on the 20th business day.
    Last UpdatedJune 4, 2003
    Sampletext

    Transmitter Reconciliation Data File

    Sample of the Transmission Tariff related data files published to market participants and transmitters for reconciliation of Transmission Tariff related charges. These are Published with Preliminary information on the 10th business day after the month end trade date to be followed by a Final edition on the 20th business day.
    Last UpdatedNovember 22, 2004
    Sampletext

    Transmission Tariff Peak System Demand Report

    Sample of the Transmission Tariff related data files published to market participants and transmitters for reconciliation of Transmission Tariff related charges. These are Published with Preliminary information on the 10th business day after the month end trade date to be followed by a Final edition on the 20th business day.

    Last UpdatedNovember 11, 2004
    Samplehtml

    Format Specifications for Settlement Statement Files and Data Files

    Has the following samples
    Last Updated , 
    SampleN/A

    Funds Administration

    Text Invoice File Format Report Format (IMP_REP_0049)

    This document describes the formats of the Market Participant invoices.
    Last UpdatedMarch 2, 2016
    Documentpdf

    Financial Market Invoices (Accessed via the IESO Reports Site)

    This sample of a Financial Market Invoice produced for participating Market Participants for each Financial Market Billing cycle. The invoice details the credits an debits for the market Participant on a charge type basis.
    Last UpdatedMarch 3, 2016
    Publishing FrequencySee Settlement Schedule and Payments Calendar (SSPC)
    Report PeriodBilling Period
    Samplexml

    Statements of Activity

    This sample of the monthly Statement of Activity, published for market participants, summarizes all invoice and payment activity for the month.
    Last UpdatedMarch 3, 2016
    Publishing FrequencyMonthly; First business day of next calendar month
    Report PeriodCalendar month
    Samplexml

    Physical Market Invoices (Accessed via the IESO Reports Site)

    This sample of a Physical Market Invoice produced for participating Market Participants for each Physical Market Billing cycle. The invoice details the credits an debits for the market Particpant on a charge type basis.
    Last UpdatedMarch 3, 2016
    Publishing FrequencySee Settlement Schedule and Payments Calendar (SSPC)
    Report PeriodBilling Period
    Samplexml

    XML and Automated Documents

    XML - A Quick Primer (IESO_GDL_0028)

    A document to provide participants with a simple overview of XML Reporting
    Last UpdatedSeptember 12, 2007
    Documentpdf

    Viewing XML documents in Excel (IESO_GDE_0181)

    This guide describes how to view XML documents in Excel 2003.
    Last UpdatedMarch 9, 2005
    Documentpdf

    Automated Documents (STD-2)

    This document defines the standards applicable to the production of IESO automated documents.
    Last UpdatedMarch 25, 2015
    Documentpdf

    Outbound Automated Document, Application Programming Interface (IMO_SPEC_0100)

    This document presents and describes the application programming interface (API) for automating retrieval of XML reports published by the IESO.
    Last UpdatedAugust 12, 2015
    Documentpdf

    Shared components of Schema model for XML reports that reference old IMO domain.

    Sample file intended to allow report users to set up their XML parser for receiving the following IESO reports: - Intertie Schedule and Flow Report - Generators Output and Capablity Report - Hourly Ontario Energy Price (HOEP) Report - Dispatch Advisory Report
    Last UpdatedDecember 10, 2003
    Samplexsd

    Shared XML Schema

    Common Schema for al XML reports in service after June 1st, 2006.
    Last UpdatedJune 7, 2006
    Samplexsd

    IESO Reports API Guide

    Access Interfaces for Confidential Reports

    This document presents and describes the application programming interface (API) and SFTP for automating retrieval of confidential reports published by the IESO. 
    Last UpdatedApril 13, 2015
    Documentpdf