---
title: "CostakerRewardsTracker queries the costaker reward tracker."
method: GET
path: "/babylon/costaking/v1/costakers/{costaker_address}/rewards_tracker"
tags: ["Query"]
---

# CostakerRewardsTracker queries the costaker reward tracker.

`GET /babylon/costaking/v1/costakers/{costaker_address}/rewards_tracker`

## Request

- The document declares no server URL.
- Auth: none declared

## Path parameters

- `costaker_address` string, required

## Response `200`

A successful response.

- object: QueryCostakerRewardsTrackerResponse is the response type for the Query/CostakerRewardsTracker RPC method.
  - `start_period_cumulative_reward` string, uint64: StartPeriodCumulativeReward the starting period the costaker made his last withdraw of costaking rewards or modified his active staking amount of satoshis or baby.
  - `active_satoshis` string, byte: ActiveSatoshis is the total amount of active satoshi delegated from this costaker babylon address.
  - `active_baby` string, byte: ActiveBaby is the total amount of active baby delegated from this costaker babylon address.
  - `total_score` string, byte: TotalScore is the total amount of calculated score of this costaker.

## Other responses

- `default`: An unexpected error response.

## Changes

- **2025-09-26** `9c1ec78a8f41`: 1 info
  - endpoint added
- **2023-02-14** `56ada4e129e1`: 1 breaking
  - api path removed without deprecation

[Operation history](https://skmtc.dev/babylonlabs-io/apis/babylon-grpc-gateway-docs/changes/babylon/costaking/v1/costakers/:costaker_address/rewards_tracker/get.md)

---

[API](https://skmtc.dev/babylonlabs-io/apis/babylon-grpc-gateway-docs.md) - [All operations](https://skmtc.dev/babylonlabs-io/apis/babylon-grpc-gateway-docs/llms.txt) - [OpenAPI document](https://skmtc.dev/babylonlabs-io/apis/babylon-grpc-gateway-docs/revisions/93a09c641887?raw)