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 view all relevant documents.
| Status |
Document |
Description |
Last Updated |
Publishing Frequency | Report Period | Public/ MP Confidential | Link | Template | Sample |
| | 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. | 11/14/2000 | | | | | pdf | N/A |
| | Physical Market Bids (RTEM) | This template is used to specify the bids or offers for various resources like generators, loads, off-takes and injections. | 6/1/2005 | | | | | pdf | text |
| | 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. | 6/1/2005 | | | | | pdf | text |
| | Physical Market Schedules | This template is used to specify the schedules for various resources. | 6/1/2005 | | | | | pdf | text |
| | Physical Market Standing Schedules | This template is used to specify the standing schedules for various resources. | 6/1/2005 | | | | | pdf | text |
| | Operating Reserve Valid Bids (IMO_TPL_0016) | This template is used to send Operating Reserve Offer/Bid data to the IESO. | 6/1/2005 | | | | | pdf | text |
| | Operating Reserve Standing Bids | This template is used to send standing Operating Reserve Offer/Bid data to the IESO. | 6/1/2005 | | | | | pdf | text |
| | Bilateral Contracts (IMO_TPL_0030) | This template is used to specify the hourly amount exchanged between parties to the bilateral contract. | 6/1/2005 | | | | | pdf | text |
| | Bilateral Standing Contracts | This template is used to specify the hourly amount exchanged between parties to the bilateral contract. | 6/1/2005 | | | | | pdf | text |
| | 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). | 3/7/2012 | | | | pdf | | |
| | Physical Market RTEM Valid Bids | This template is used to retrieve the bids or offers for various resources like generators, loads, offtakes and injections. | 6/5/2006 | | | | | pdf | text |
| | 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. | 6/5/2006 | | | | | pdf | text |
| | 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. | 10/12/2001 | | | | | pdf | text |
| | Physical Market Schedules Valid Bids | This template is used to retrieve the schedules for various resources. | 6/1/2005 | | | | | pdf | text |
| | Physical Market Schedules Valid Standing Bids | This template is used to retrieve standing schedules for various resources. | 6/1/2005 | | | | | pdf | text |
| | 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. | 10/12/2001 | | | | | pdf | text |
| | Operating Reserve Valid Bids | This template is used to retrieve Operating Reserve Offer/Bid data. | 6/5/2006 | | | | | pdf | text |
| | Operating Reserve Valid Standing Bids | This template is used to retrieve standing Operating Reserve Offer/Bid data | 6/5/2006 | | | | | pdf | text |
| | 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. | 9/26/2001 | | | | | pdf | text |
| | Physical Market Bilateral Valid Bids | This template is used to retrieve hourly amount exchanged between parties to the bilateral contract. | 6/1/2005 | | | | | pdf | text |
| | Physical Market Bilateral Valid Standing Bids | This template is used to retrieve standing hourly amount exchanged between parties to the bilateral contract. | 6/1/2005 | | | | | pdf | text |
| | 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. | 11/21/2001 | | | | | pdf | text |
| | Physical Market Predispatch Report | This report provides pre-dispatch energy schedule information for each hour of the forecast period | 9/26/2001 | | | | | pdf | text |
| | 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. | 12/21/2001 | | | | | pdf | text |
| | Physical Market Dispatch Constrained Hourly Report (IESO_TPL_0035) | This report contains energy dispatch schedules for each 5-minute interval of a particular hour. | 6/5/2006 | | | | | pdf | text |
| | 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 | 12/21/2001 | | | | | pdf | N/A |
| | 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. | 6/5/2006 | | | | | pdf | text |
| | Operating Reserve Predispatch Report | This report provides pre-dispatch Operating Reserve schedule information for each hour of the forecast period | 9/26/2001 | | | | | pdf | To be provided |
| | 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. | 12/21/2001 | | | | | pdf | text |
| | 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. | 6/5/2006 | | | | | pdf | text |
| | 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 | 12/21/2001 | | | | | pdf | N/A |
| | 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. | 6/5/2006 | | | | | pdf | text |
| | 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 | 12/21/2001 | Hourly | | Public | | pdf | csv |
| | 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. | 12/21/2001 | 5 min | | Public | | pdf | csv |
| | 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. | 9/26/2001 | Hourly | | Public | | pdf | csv |
| | 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. | 3/7/2007 | Hourly | | Public | | pdf | csv |
| | 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. | 3/7/2007 | Hourly | | Public | | pdf | csv |
| | Predispatch Unconstrained Regional Constraints Report | This report contains the intertie scheduling limits used as inputs to the unconstrained run of the predispatch algorithm. | 9/26/2001 | Hourly | | Public | | pdf | csv |
| | 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. | 9/26/2001 | Hourly | | Public | | pdf | csv |
| | 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. | 12/21/2001 | Hourly | | Public | | pdf | csv |
| | 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. | 12/21/2001 | Hourly | | Public | | pdf | csv |
| | Predispatch Security Constraints Report | This report contains a list of binding security constraints for the predispatch run of the algorithm | 12/5/2002 | Hourly | | Public | | pdf | html; csv |
| | Dispatch Security Constraints Report | This report contains a list of binding security constraints for the dispatch run of the algorithm, for each 5 minute interval of the hour. | 12/5/2002 | Hourly | | Public | | pdf | html; csv |
| | Predispatch Constrained Shadow Prices Report | This report contains pre-dispatch Shadow Prices at selected nodes within Ontario | 3/11/2002 | Hourly | | Public | | pdf | csv |
| | Dispatch Constrained Shadow Prices Report | This report contains dispatch Shadow Prices at selected nodes within Ontario, for each 5 minute interval of the hour. | 3/11/2002 | Hourly | | Public | | pdf | csv |
| | Dispatch Unconstrained Energy HOEP Price Report | This report displays the Hourly Ontario Energy Price for each preceding hour of the day | 12/21/2001 | Hourly | | Public | | pdf | csv |
| | 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 | 1/24/2002 | Hourly | | Public | | pdf | csv |
| | 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 | 7/25/2003 | Hourly | Dispatch Day | Public | | pdf | csv |
| | 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 | 7/25/2003 | Hourly | Dispatch Day | Public | | pdf | csv |
| | 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. | 7/25/2003 | Hourly | Dispatch Hour | Public | | pdf | csv |
| | 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 | 7/25/2003 | Hourly | Dispatch Hour | Public | | pdf | csv |
| | Daily SAA hourly data report | This report is used to post Daily System Adequacy and Assessment Report hourly data. | 10/30/2002 | Daily | 12 days | Public | | pdf | csv |
| | 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. | 3/7/2012 | Daily | 12 days | Public | | pdf | csv |
| | Weekly SAA report (IESO_TPL_0088) | This report is used to post Weekly System Adequacy and Assessment Report data for public information. | 3/7/2012 | Daily | 35 days | Public | | pdf | html; csv |
| | Daily SSR hourly data report (IMO_TPL_0022) | This report is used to post System Status Report hourly data. | 6/1/2005 | Daily | 3 days | Public | | pdf | csv |
| | 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. | 3/7/2012 | Daily | 3 days | Public | | pdf | csv |
| | 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. | 12/10/2008 | | | Public | pdf | | |
About The IESO
