API Reference

Backtest Management


The QuantConnect REST API lets you manage backtests on our cloud servers through URL endpoints.


Updates the tags collection for a backtest.


Information required to update the tags collection for a backtest. The /backtests/tags/update API accepts requests in the following format:

UpdateBacktestTagsRequest Model - Updates the tags collection for a backtest.
projectId integer
Project Id for the backtest we want to update.
backtestId Backtest Id we want to update.
tags string Array
Array of the new backtest tags.
  "projectId": 0,
  "backtestId": ,
  "tags": [


The /backtests/tags/update API provides a response in the following format:

200 Success

RestResponse Model - Base API response class for the QuantConnect API.
success boolean
Indicate if the API request was successful.
errors string Array
List of errors with the API call.
  "success": true,
  "errors": [

401 Authentication Error

UnauthorizedError Model - Unauthorized response from the API. Key is missing, invalid, or timestamp is too old for hash.
www_authenticate string

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