---
title: "Gets all FAR Part 51 Authorizations"
method: GET
path: "/far51"
tags: ["cost"]
---

# Gets all FAR Part 51 Authorizations

`GET /far51`

Returns an array of FAR Part 51 Authorizations known to the vendor, so that the ATAT client can track them. This information must be provided in this way (sourced by the vendor rather than the ATAT client) because FAR Part 51 Authorizations are not processed through the ATAT UI in the same fashion as Portfolios, Task Orders and  Environments. Must return an array of FAR Part 51 Authorizations, subject to the `limit` and `offset` pagination  parameters as well as the `start_date` and `end_date` query parameters, sorted by `created_at`.

## Query parameters

- `start_date` string, date, required
- `end_date` string, date, required
- `limit` integer
- `offset` integer

## Response `200`

FAR Part 51 Authorizations successfully retrieved

- Far51Authorization[]
  - `id` string — Unique identifier for this FAR Part 51 Authorization. Used for retrieval of cost data.
  - `created_at` string, date — Date this FAR Part 51 Authorization was created by the vendor's ATAT implementation in YYYY-MM-DD format.
  - `contract_number` string — Contract Number under which this FAR Part 51 Authorization was granted
  - `delivery_order_number` string — Delivery Order Number under which this FAR Part 51 Authorization was granted
  - `pop_start_date` string, date — Start of period of performance for this FAR Part 51 Authorization in YYYY-MM-DD format.
  - `pop_end_date` string, date — End of period of performance for this FAR Part 51 Authorization in YYYY-MM-DD format.
  - `customer_department` string — Abbreviation for Agency or Department associated with this FAR Part 51 Authorization, e.g. AF, Army, DLA, DOJ
  - `authorizing_contract_officer` object — Contact information for authorizing Contract Officer
    - `name` string
    - `telephone` string
    - `email` string, email

## Other responses

- `400` — Missing required parameter or invalid parameter

---

[API](https://skmtc.net/dod-ccpo/apis/atat-csp-api.md) · [All operations](https://skmtc.net/dod-ccpo/apis/atat-csp-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/dod-ccpo/atat-csp-api/versions/22014acb308f/schema)