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Change Log

All notable changes to the TradeZero API will be documented on this page.

March 3, 2026​

New​

February 10, 2026​

New​

  • New Order Endpoint Added - new endpoint to retrieve an individual order by clientOrderId for the account:

    • GET /v1/api/accounts/{accountId}/order/{clientOrderId} - retrieves the details of a specific order using its clientOrderId
    • This endpoint provides a more efficient way to access order details without having to filter through all orders

Removed​

  • Order Response Structure - Removed several fields from order and cancel responses:

    • status - redundant field, the order's status is already contained in the orderStatus field
    • lastUpdatedET - not relevant for API consumers
    • startTimeET - not relevant for API consumers

January 14, 2026​

Changed​

  • Order Response Structure - The API no longer returns the orderId field in order responses

    • All order operations now exclusively use clientOrderId for identification and tracking
    • If no clientOrderId is provided during order creation, the system will auto-generate one

  • Cancel Order Endpoint - The DELETE /v1/api/accounts/{accountId}/orders/{clientOrderId} endpoint now uses clientOrderId in the URL path

    • This change ensures consistency with the updated response structure
    • All order management now centers around the clientOrderId field

Migration Guide​

For Order Management:

  • Update your code to use only clientOrderId for order tracking and identification
  • Remove any references to orderId from response parsing logic
  • Ensure your order creation requests include a unique clientOrderId for better tracking
  • All cancellation requests should use the clientOrderId from your order tracking system

For Sell Locate Requests: Update your sell locate requests to use the new string format:

  • Old: "locateType": 1
  • New: "locateType": "Locate"

String Value Mapping:

  • 0 (Unknown) → "Unknown"
  • 1 (Locate) → "Locate"
  • 2 (Intraday Only) → "IntraDay"
  • 3 (Pre-Borrow) → "PreBorrow"
  • 4 (Single Use) → "SingleUse"

December 11, 2025​

Changed​

  • Locates Endpoints - The GET /v1/api/accounts/{accountId}/locates endpoint has been split into two more specific endpoints:

    • GET /v1/api/accounts/{accountId}/locates/inventory - Returns only active locate inventory for the current trading day
    • GET /v1/api/accounts/{accountId}/locates/history - Returns all open/closed/expired locates for the day

    This change provides better performance and more granular control over the data you retrieve. Please update your integrations to use the appropriate endpoint.

Removed​

  • Locates Endpoint - GET /v1/api/accounts/{accountId}/locates has been removed and replaced with the two new endpoints above.

November 24, 2025​

Changed​

  • Order Cancellation Response - Order cancel requests now return full order details in the response instead of just a confirmation message. This provides better visibility into the canceled order's final state without having make an additional REST call for order status.

Legend​

TypeDescription
NewNew features, endpoints, or capabilities added to the API
ChangedModifications to existing functionality or behavior
FixedBug fixes and error corrections
DeprecatedFeatures that will be removed in a future version
RemovedFeatures that have been removed from the API
SecuritySecurity-related updates and improvements
info

For breaking changes, migration guides, or questions about updates, please contact our support team at api-support@tradezero.com.