CME STP FIXML AND CME STP FIX

NewCME STP FIXML - Swap-Based Event Contracts URL Migration - March 29

Effective Sunday, March 29 (trade date Monday, March 30), CME Group will update the CME STP FIXML service URLs for client systems trading Swap-Based Event Contracts. The new URLs will support all CME STP products.

Existing API IDs will remain valid with the new URLs. Legacy URLs will be available in parallel until the decommission in late Q2. The following is the migration timeline:

Production
CME STP FIXML URL	Scope	Dates
New: https://posttrade.api.cmegroup.com/cmestp/query	Trades on all products including Swap-Based Event Contracts. This URL will be available on a 24/7 basis.	Sunday, March 29 (trade date Monday, March 30)
Legacy: https://posttrade.api.cmegroup.com/cmestp7d/query	Only Swap-Based Event Contracts	Decommission Late Q2 2026

New Release
CME STP FIXML URL	Scope	Dates
New: https://posttrade.api.uat.cmegroup.com/cmestp/query	Trades on all products including Swap-Based Event Contracts. Not available on weekends.	Now Available
Legacy: https://posttrade.api.uat.cmegroup.com/cmestp7d/query	Currently this URL only supports Swap-Based Event Contracts and will be decommissioned in late Q2	Decommission Late Q2 2026

CME STP FIXML - Service Availability and Regional Maintenance Update - March 29

Effective this Sunday, March 29 (trade date Monday, March 30), CME Group will make the CME STP FIXML service available on a 24/7 basis and will introduce regional maintenance during weekends.

Clients should note that the x-cme-token, which is used by client systems for ongoing subscriptions and for multi-batch queries, will not be valid across regions. After regional maintenance, Client systems will receive a TradeCaptureReportRequestAck with the attribute @txt="x-cme-token is no longer valid. Please initiate a new subscription" and must reestablish their subscription to obtain a valid token.

This change is currently available in New Release (maintenance weekly on Wednesdays). Customers are highly encouraged to test their recovery processes in New Release and complete the mandatory supplemental certification.

CME STP FIXML service in New Release is not available on weekends.

Please contact Certification Support for Electronic Trading (CSET) with any questions in the U.S. at +1 312 930 2322, in Europe at +44 20 3379 3803 or in Asia at +65 6593 5593.

CME STP FIX on Google Cloud - Service Availability and Regional Maintenance - March 29

Effective this Sunday, March 29 (trade date Monday, March 30), CME Group will make the CME STP FIX service on Google Cloud available on a 24/7 basis and will introduce regional maintenance during weekends.

During the regional maintenance, client systems using the Managed Connectivity options will be disconnected and are required to reestablish their connections and resubscribe to continue the receipt of post-trade messages. Client systems using Regional Connectivity options should switch regions on their end upon disconnection.

View Production client connectivity options for more information.

This change is currently available in New Release (maintenance weekly on Wednesdays). Customers are highly encouraged to test their recovery processes in New Release and complete the mandatory supplemental certification.

CME STP FIX service in New Release is not available on weekends.

Please contact Certification Support for Electronic Trading (CSET) with any questions in the U.S. at +1 312 930 2322, in Europe at +44 20 3379 3803 or in Asia at +65 6593 5593.

NewCME STP FIX and FIXML - Truncation of Trailing Zeros in Specific Quantity Fields - April 19

Effective Sunday, April 19 (trade date Monday, April 20), the trailing zeros will be truncated in the Unit of Measure Quantity and Trading Quantity fields in CME STP FIX and FIXML Trade Capture Reports. This truncation does not change the precision of these fields.

Product	STP Field	STP FIXML Attribute	STP FIX tag	Example Quantity values
				Current Quantity value	New Quantity Value
Futures and Options	Unit of Measure Quantity	/TrdCaptRpt/Instrmt/@UOMQty /TrdCaptRpt/TrdLeg/Leg/@UOMQty	1147-UnitofMeasureQuantity 1224-LegUnitofMeasureQuantity	100.00	100
	Trading Quantity	/TrdCaptRpt/@TrdgQty /TrdCaptRpt/TrdLeg/@TrdgQty	32-TradingQuantity 10038-LegTradingQuantity	22046.20	22046.2

This change will be available for customer testing in New Release on Monday, March 23.

NewUpdate to Unit of Measure Quantity for Dutch TTF NG Futures and Options - April 19

Effective Sunday, April 19 (trade date Monday, April 20), the Unit of Measure Quantity field for trades on Dutch TTF NG futures and options will be updated to reflect the Contract Value factor in CME STP FIX and FIXML.

Update to Unit of Measure Quantity for Dutch TTF NG Futures and Options
Product	STP Field	STP FIXML Attribute	STP FIX tag	Current value	New Value Range
Dutch TTF NG Futures and Options	Unit of Measure Quantity	/TrdCaptRpt/Instrmt/@UOMQty /TrdCaptRpt/TrdLeg/Leg/@UOMQty	1147-UnitofMeasureQuantity 1224-LegUnitofMeasureQuantity	1	672 and 745, inclusive

This change will be available for customer testing in New Release on Monday, March 23.

NewFutures and Options Post-Trade Message Flow Update - April 19

Effective Sunday, April 19 (trade date Monday, April 20), Trade Capture Reports in CME STP FIX and FIXML for futures and options will be suppressed when requests to FEC+ do not result in a business level update.

Business level updates, such as Trade Allocation, Update, Void and Transfer, among others will continue to flow to CME STP FIX and FIXML.

This change will be available for customer testing in New Release on Monday, March 23.

NewPrice Type Field Update to Allocations - April 19

Effective Sunday, April 19 (trade date Monday, April 20), CME Group will update the Price Type (FIXML: TrdCaptRpt/@PxTyp, FIX: tag 423-PriceType) in the Allocation Trade Capture Reports for futures and options trades to match the Price Type from the initial trade.

This change will be available for customer testing in New Release on Monday, March 23.

CME STP FIX on Google Cloud - Production Internet Connectivity - April 26

As part of a phased migration of CME Straight Through Processing APIs to Google Cloud, Production internet connectivity options for CME STP FIX API are now available.

By Sunday, April 26, all clients must complete migration and connect to CME STP FIX API Production using only the Google Cloud hostnames.

CME STP FIX on Google Cloud is available in parallel to the current on-prem instance. When connecting in parallel to Google Cloud and on-prem instances, clients should ensure trades are not double-booked.

A mandatory supplemental certification for message recovery is now available for CME STP FIX on Google Cloud. 

Please contact Certification Support for Electronic Trading (CSET) with any questions in the U.S. at +1 312 930 2322, in Europe at +44 20 3379 3803 or in Asia at +65 6593 5593.

CME STP FIX on Google Cloud - Production Dedicated Connectivity - April 26

As part of a phased migration of CME Straight Through Processing APIs to Google Cloud, Production dedicated connectivity options for CME STP FIX API are now available.

By Sunday, April 26, all clients must complete migration and connect to CME STP FIX API Production using only the Google Cloud hostnames.

CME STP FIX on Google Cloud is available in parallel to the current on-prem instance. When connecting in parallel to Google Cloud and on-prem instances, clients should ensure trades are not double-booked.

A mandatory supplemental certification for message recovery is now available for CME STP FIX on Google Cloud. 

Please contact Certification Support for Electronic Trading (CSET) with any questions in the U.S. at +1 312 930 2322, in Europe at +44 20 3379 3803 or in Asia at +65 6593 5593.

Contacts

Please contact the following support teams for:

• New Release Environment Support: Certification Support for Electronic Trading (CSET) in the U.S. at +1 312 930 2322, in Europe at +44 20 3379 3803 or in Asia at +65 6593 5593.
• Production Environment Support: CME Global Command Center (GCC) in the U.S. +1 800 438 8616, in Europe at +44 20 7623 4747, in Asia at +65 6532 5010 or in Japan at +81 3 6733 7559.

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