ACATS Technical Resources

November 16, 2021

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Note: DTCC is modernizing the client interfaces that firms use to communicate with the ACATS systems. The client interface enhancements also include features to process 529 accounts transfers through the ACATS Fund/SERV® service. To access resources for these client interface enhancements, see the ACATS Projects section.

View the JSON input formats that are supported with the API Marketplace or Message Queue (MQ) specifications.

ACATS Asset Input JSON Format (Legacy AT)

July 24, 2026

ACATS Transfer Input JSON Format (Legacy TI)

August 13, 2026

ACATS Mutual Fund Registration Input JSON Format (Legacy FR)

February 11, 2026

ACATS Ingress Schema

October 03, 2024

View the JSON output formats that are supported only through MQ.

ACATS Egress Schema

October 23, 2024

ACATS Participant Master Output Format

April 10, 2026

ACATS Multicycle/End-of-Day MQ Output Format

July 02, 2026

ACATS Position MQ Output Format

June 05, 2026

ACATS Settlement MQ Output Format

July 24, 2026

ACATS Insurance Statistics MQ Output Format

April 10, 2026

ACATS Interface Rejects MQ Output Format

April 10, 2026

CNS ACATS Ineligible Security Reject and CNS ACATS EOD Fail MQ Output Format

April 10, 2026

ACATS Fund/SERV Statistics MQ Output Format

April 15, 2026

ACATS Reversal MQ Output Format

April 17, 2026

ACATS Mutual Fund Reversal MQ Output Format

April 17, 2026

ACATS Client Interface Message Codes

April 29, 2025

View the sample JSONs available in PDF or by downloading the zip containing the following samples:

Multicycle Transaction Sample JSON
End-of-Day Transaction Sample JSON
Position Sample JSON
Settlement Sample JSON
Insurance Statistics Sample JSON
Interface Rejects Sample JSON
Fund/SERV Statistics Sample JSON
End of Message (EOM) Notification Sample JSON
CNS/NON-CNS Reversals
Mutual Funds Reversals
Participant Master

See Also: View sample requests and responses in the ACATS Message Queue (MQ) Guide. For detailed information about the JSON input structure and usage, see DTCC API Marketplace.

ACATS Sample JSONs

July 02, 2026

ACATS Sample JSONs - Zip

July 02, 2026

Click to access and download the legacy fixed and variable input formats for ACATS.

Note: On February 1, 2027, the ACATS legacy fixed and variable files are being decommissioned. If your firm uses these files, you must migrate to the new JSON messaging through API or MQ prior to this date. See the ACATS Projects section.

Fixed Input

ACATS Asset Input (AT) RJE - Fixed (DATATRAK SYSID: 32667)

February 14, 2020

ACATS Transfer Input (TI) RJE - Fixed (DATATRAK SYSID: 32667)

February 14, 2020

ACATS Mutual Fund Registration Input (FR) RJE - Fixed (DATATRAK SYSID: 32667)

February 14, 2020

ACATS Insurance Registration Input (IR) RJE - Fixed (DATATRAK SYSID: 32667)

February 15, 2020

Variable Input

ACATS Asset Input (AT) - Variable (DATATRAK SYSID: 36667)

February 14, 2020

ACATS Transfer Input (TI) - Variable (DATATRAK SYSID: 36667)

February 14, 2020

ACATS Mutual Fund Registration Input (FR) - Variable (DATATRAK SYSID: 36667)

February 14, 2020

ACATS Insurance Registration Input (IR) - Variable (DATATRAK SYSID: 36667)

February 14, 2020

Click to access and download the legacy fixed and variable output formats for ACATS.

Note:

DTCC is providing a temporary hybrid solution to firms that need to submit transactions through JSON messages but continue to receive multicycle egress through the legacy fixed or variable formats. For more information, see the ACATS Hybrid Transaction Reference Solution resource in the ACATS Client Interface Modernization section.
To support the new Trump account type planned for Production implementation in July 2026, TP (Trump account) has been added as a valid code for Original Receiver Customer Account type in all applicable legacy output files.
On February 1, 2027, the ACATS legacy fixed and variable files are being decommissioned. If your firm uses these files, you must migrate to the new JSON messaging through API or MQ prior to this date. See the ACATS Projects section.

Fixed Output

ACATS Participant Master File MRO: AutoRoute ID 02090068

February 14, 2020

ACATS Multicycle Transaction MRO/End-of-Day Transaction MRO - Fixed (AutoRoute: 02090722, 02090723)

February 20, 2026

ACATS Output Position - Fixed (AutoRoute Prod: 02090724) - LEGACY

February 20, 2026

ACATS Output Settlement - Fixed (AutoRoute Prod: 02090725)

February 23, 2026

ACATS Output Interface Rejects - Fixed (AutoRoute Prod: 02090727)

May 06, 2025

ACATS Reversal MRO Comma Delimited File Output - Fixed (AutoRoute Prod: 02091657)

February 14, 2020

ACATS Output Fund/SERV Statistics - Fixed (AutoRoute Prod: 02090726)

February 23, 2026

ACATS Output Insurance Statistics - Fixed (AutoRoute Prod: 02091499)

February 14, 2020

ACATS Mutual Fund Reversal Comma Delimited File Output - Fixed (AutoRoute Prod: 02091077)

February 14, 2020

Variable Output

ACATS Multicycle Transaction MRO/End of Day Transaction MRO - Variable

February 20, 2026

ACATS Output Position - Variable

February 23, 2026

ACATS Output Settlement - Variable

February 23, 2026

ACATS Output Fund/SERV Statistics - Variable

February 23, 2026

ACATS Output Insurance Statistics - Variable

February 14, 2020

CNS ACATS Ineligible Security Reject Files/CNS ACATS EOD Fail File

February 14, 2020

ACATS Output Interface Rejects - Variable

May 06, 2025

ACATS Reversal Output - Variable

February 23, 2026