NSE Clearing Limited (NCL) has announced the release of additional facilities in the UAT (User Acceptance Testing) environment as part of the ongoing rollout of the API Facility in NCMS CM. This is a continuation of the earlier circular NCL/CMPT/71456 dated November 25, 2025. The newly available UAT features include Custodial Participant (CP) trade modification, OTR (Own Trade Recognition) allocation by Members, and trade confirmation by Custodians.

Key Points

• Additional UAT facilities now available: CP trade modification and OTR allocation by Members, and trade confirmation by Custodians
• Continuation of NCL circular NCL/CMPT/71456 dated November 25, 2025 on ‘Introduction of API Facility in NCMS CM’
• Members and Custodians must refer to the attached API specification document (Protocol for Web API for Members, Version 1.1)
• Registration required to test: participants must email msd_clearing@nsccl.co.in with specific details
• API specification document updated to Version 1.1 (revised March 2, 2026 from initial October 29, 2025 version)

Regulatory Changes

No new regulatory mandate introduced. This circular extends the UAT availability of the API facility first announced in November 2025, adding CP trade modification, OTR allocation, and trade confirmation capabilities to the NCMS CM API suite.

Compliance Requirements

• Members and Custodians wishing to test the new UAT facilities must register by sending an email to msd_clearing@nsccl.co.in with the following details:
  • Primary Member Code / Custodian Code
  • Member Name / Custodian Name
  • Email ID (Group ID preferred)
  • Contact Number
  • IP Address(es) from which API requests will be sent (multiple IPs allowed)
• Participants must review the updated API specification document (Version 1.1) before testing

Important Dates

• Circular Date: April 24, 2026
• UAT environment availability: Effective from the date of this circular
• No production go-live date mentioned in this circular

Impact Assessment

This update is operationally significant for Members and Custodians who participate in the Capital Market Segment and plan to integrate with NSE Clearing’s API-based NCMS platform. The addition of CP trade modification and OTR allocation/confirmation via API will streamline post-trade workflows and reduce manual intervention. There is no immediate market-wide impact; the current phase is limited to UAT testing. Participants not yet registered for API testing should register promptly to assess integration readiness before the production rollout.