---
title: "Tariff Optimize - Search for Load Serving Entities"
method: GET
path: "/spark/optimized_tariffs/load_serving_entities"
tags: ["Spark"]
---

# Tariff Optimize - Search for Load Serving Entities

`GET /spark/optimized_tariffs/load_serving_entities`

Returns a list of Genability load serving entities (LSEs) for a given zip code, for use in tariff searches.

## Query parameters

- `zip_code` string, required

## Headers

- `Arcadia-Version` string, required

## Response `200`

Success

- SearchLoadServingEntitiesResponse
  - `data` LoadServingEntitySchema[], required — Results
    - `lse_id` string, required — Genability ID of the load serving entity, prefixed with `gen_lse_`.
    - `name` string, required — Name of the load serving entity.
    - `code` string, required — Alternate key identifying the load serving entity. For US companies, this is the EIA ID.
    - `num_customers` integer, required — Total customer count for the load serving entity. Results will be sorted by this value in descending order (so the first result will be the most likely LSE).
  - `total_count` integer, required — Number of results

---

[API](https://skmtc.dev/arcadia/apis/arcadia-api-reference.md) · [All operations](https://skmtc.dev/arcadia/apis/arcadia-api-reference/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/arcadia/arcadia-api-reference/revisions/468f1c903722/schema)