---
title: "Get all tier one cost codes in project"
method: GET
path: "/api/v3/projects/{project_id}/tier_one_cost_codes"
tags: ["tier one cost codes"]
---

# Get all tier one cost codes in project

`GET /api/v3/projects/{project_id}/tier_one_cost_codes`

## Path parameters

- `project_id` string, uuid, required

## Query parameters

- `last_synced_at` string, date-time

## Headers

- `Fieldwire-Version` string, date, required
- `Fieldwire-Filter` 'active' | 'deleted'
- `Fieldwire-Per-Page` integer

## Response `200`

Successful response

- TierOneCostCode[]
  - `id` string, uuid, required — ID of the cost group
  - `name` string, required — Name of the cost group
  - `code` string, required — Unique identifying code of the cost group
  - `project_id` string, uuid, required — ID of the project this entity belongs to
  - `creator_user_id` integer, required — ID of the user who created this entity
  - `last_editor_user_id` integer, required — ID of the user who most recently edited this entity
  - `created_at` string, date-time, required — Time when the server created the entity
  - `updated_at` string, date-time, required — Time when the server last updated the entity
  - `device_created_at` string, date-time, required — Time when the device created the entity
  - `device_updated_at` string, date-time, required — Time when the device last updated the entity
  - `deleted_at` string, date-time, nullable, required — Time the server deleted the entity
  - `resolved_conflict` boolean — Specifies if PUT/PATCH request was rejected - do not store this field!

---

[API](https://skmtc.dev/fieldwire/apis/fieldwire-super-api.md) · [All operations](https://skmtc.dev/fieldwire/apis/fieldwire-super-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/fieldwire/fieldwire-super-api/revisions/66ee1c20b92d/schema)