---
title: "[beta] List driver efficiency"
method: GET
path: "/beta/fleet/drivers/efficiency"
tags: ["Beta APIs"]
---

# \[beta\] List driver efficiency

`GET /beta/fleet/drivers/efficiency`

## Request

- Base URL: `https://api.samsara.com`
- URL: `https://api.samsara.com/beta/fleet/drivers/efficiency`
- Auth: HTTP bearer

Get all driver and associated vehicle efficiency data. 

 This is a legacy endpoint, consider using this endpoint [/driver-efficiency/drivers](https://developers.samsara.com/reference/getdriverefficiencybydrivers) instead. The endpoint will continue to function as documented. 

 <b>Rate limit:</b> 50 requests/sec (learn more about rate limits <a href="https://developers.samsara.com/docs/rate-limits" target="_blank">here</a>). 

 **Submit Feedback**: Likes, dislikes, and API feature requests should be filed as feedback in our <a href="https://forms.gle/zkD4NCH7HjKb7mm69" target="_blank">API feedback form</a>. If you encountered an issue or noticed inaccuracies in the API documentation, please <a href="https://www.samsara.com/help" target="_blank">submit a case</a> to our support team.

To use this endpoint, select **Read Fuel & Energy** under the Fuel & Energy category when creating or editing an API token. <a href="https://developers.samsara.com/docs/authentication#scopes-for-api-tokens" target="_blank">Learn More.</a>

## Query parameters

- `driverActivationStatus` 'active' | 'deactivated'
- `driverIds` string[]
- `after` string
- `driverTagIds` string[]
- `driverParentTagIds` string[]
- `startTime` string, date-time
- `endTime` string, date-time

## Response `200`

List of all driver and associated vehicle efficiency data

- DriverEfficienciesResponse: Summary of drivers' efficiencies over a time range.
  - `data` DriverEfficienciesResponseData
    - `driverSummaries` DriverEfficiency[]: A list of driver and associated vehicle efficiency data.
      - `anticipationBrakeEventCount` number: Quick braking events (less than one second after accelerating).
      - `coastingDurationMs` number: Time spent without engaging the accelerator or brake in milliseconds.
      - `cruiseControlDurationMs` number: Time spent in cruise control in milliseconds.
      - `driver` ExtendedDriverTinyResponse: A minified driver object.
        - `externalIds` object: The [external IDs](https://developers.samsara.com/docs/external-ids) for the given object.
        - `id` string: ID of the driver.
        - `name` string: Name of the driver.
        - `username` string: Username of the driver.
      - `greenBandDrivingDurationMs` number: Time in efficient RPM (800 to 17000) in milliseconds.
      - `highTorqueMs` number: Time the vehicle engine torque is greater than 90% in milliseconds.
      - `overSpeedMs` number: Driving time spent over the efficient speed threshold in milliseconds.
      - `totalBrakeEventCount` number: Total number of brake events.
      - `totalDistanceDrivenMeters` number: Distance driven in meters.
      - `totalDriveTimeDurationMs` number: Time driven in milliseconds.
      - `totalFuelConsumedMl` number: Fuel consumption in milliliters.
      - `totalIdleTimeDurationMs` number: Time spent idling in milliseconds.
      - `totalPowerTakeOffDurationMs` number: Time spent with power take off enabled while idling in milliseconds.
      - `vehicleSummaries` VehicleSummary[]: Summaries of vehicle efficiency for each vehicle the driver was driving during the given time period.
        - `anticipationBrakeEventCount` number: Quick braking events (less than one second after accelerating).
        - `coastingDurationMs` number: Time spent without engaging the accelerator or brake in milliseconds.
        - `cruiseControlDurationMs` number: Time spent in cruise control in milliseconds.
        - `distanceDrivenMeters` number: Distance driven in meters.
        - `driveTimeDurationMs` number: Time driven in milliseconds.
        - `fuelConsumedMl` number: Fuel consumption in milliliters.
        - `greenBandDrivingDurationMs` number: Time in efficient RPM (800 to 17000) in milliseconds.
        - `highTorqueMs` number: Time the vehicle engine torque is greater than 90% in milliseconds.
        - `idleTimeDurationMs` number: Time spent idling in milliseconds.
        - `overSpeedMs` number: Driving time spent over the efficient speed threshold in milliseconds.
        - `powerTakeOffDurationMs` number: Time spent with power take off enabled while idling in milliseconds.
        - `totalBrakeEventCount` number: Total number of brake events.
        - `vehicle` VehicleTinyResponse: A minified vehicle object.
          - `ExternalIds` object: The [external IDs](https://developers.samsara.com/docs/external-ids) for the given object.
          - `id` string: ID of the vehicle.
          - `name` string: Name of the vehicle.
    - `summaryEndTime` string, date-time: End time of the window for which this efficiency report was computed. Will be a UTC timestamp in RFC 3339 format. For example: `2020-03-16T16:00:00Z`
    - `summaryStartTime` string, date-time: Start time of the window for which this efficiency report was computed. Will be a UTC timestamp in RFC 3339 format. For example: `2020-03-15T16:00:00Z`
  - `pagination` PaginationResponse: Pagination parameters.
    - `endCursor` string, string, required: Cursor identifier representing the last element in the response. This value should be used in conjunction with a subsequent request's 'after' query parameter. This may be an empty string if there are no more pages left to view.
    - `hasNextPage` boolean, required: True if there are more pages of results immediately available after this endCursor.

## Other responses

- `default`: Unexpected error.

---

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