curl -X GET 'https://api.openai.com/v1/organization/costs?start_time=10&end_time=10&bucket_width=1d&project_ids=example&api_key_ids=example&line_items=example&group_by=example&limit=7&page=example-page' \
  -H "Authorization: Bearer $OPENAI_ADMIN_KEY"

# GET /organization/costs (OpenAI API)
Base URL: https://api.openai.com/v1
Auth: Authorization; OpenAI admin key; required.
Last verified: 2026-10-20

> Costs

## Critical Gotchas
* The Responses API is the primary interface for new text and tool workflows; Chat Completions remains a separate compatibility API.
* Audio transcription uploads use multipart form data rather than a JSON request body.

## cURL
curl -X GET 'https://api.openai.com/v1/organization/costs?start_time=10&end_time=10&bucket_width=1d&project_ids=example&api_key_ids=example&line_items=example&group_by=example&limit=7&page=example-page' \
  -H "Authorization: Bearer $OPENAI_ADMIN_KEY"

## Parameters
| Name | In | Type | Required | Description |
| :--- | :--- | :--- | :--- | :--- |
| start_time | query | integer | Yes | Start time (Unix seconds) of the query time range, inclusive. |
| end_time | query | integer | No | End time (Unix seconds) of the query time range, exclusive. |
| bucket_width | query | string | No | Width of each time bucket in response. Currently only `1d` is supported, defa... |
| project_ids | query | string[] | No | Return only costs for these projects. |
| api_key_ids | query | string[] | No | Return only costs for these API keys. |
| line_items | query | string[] | No | Return only costs for these exact line item names. Each value must match the... |
| group_by | query | string[] | No | Group the costs by the specified fields. Supported fields include `project_id... |
| limit | query | integer | No | A limit on the number of buckets to be returned. Limit can range between 1 an... |
Other params: page

## Response example
{"object":"page","data":[{}]}

---
Need an API key? Get one at https://platform.openai.com/api-keys

GET

GET /organization/costs — OpenAI API

OpenAI admin key (required); https://api.openai.com/v1

OpenAI API

Costs

Base URL: https://api.openai.com/v1
Auth: Authorization: Bearer <OPENAI_API_KEY>
Last verified: 2026-10-20 · upstream hash matched

Actions Try in browser→

Agents: curl -H "Accept: text/markdown" this URL
→ 358 tokens · Vary: Accept

Critical gotchas

The Responses API is the primary interface for new text and tool workflows; Chat Completions remains a separate compatibility API.

Audio transcription uploads use multipart form data rather than a JSON request body.

cURL

curl -X GET 'https://api.openai.com/v1/organization/costs?start_time=10&end_time=10&bucket_width=1d&project_ids=example&api_key_ids=example&line_items=example&group_by=example&limit=7&page=example-page' \  -H "Authorization: Bearer $OPENAI_ADMIN_KEY"

Parameters

Name	In	Type	Required	Description
start_time	query	integer	Yes	Start time (Unix seconds) of the query time range, inclusive.
end_time	query	integer	No	End time (Unix seconds) of the query time range, exclusive.
bucket_width	query	string	No	Width of each time bucket in response. Currently only `1d` is supported, default to `1d`.
project_ids	query	string[]	No	Return only costs for these projects.
api_key_ids	query	string[]	No	Return only costs for these API keys.
line_items	query	string[]	No	Return only costs for these exact line item names. Each value must match the complete `line_item` value, for example `gpt-6-astra, input_tokens`.
group_by	query	string[]	No	Group the costs by the specified fields. Supported fields include `project_id`, `user_id`, `line_item`, `api_key_id`, and `api_source`. Support for combining `user_id` with `project_id` grouping or the `project_ids` filter depends on the organization and requested time range. Unsupported combinations return HTTP 400. When grouped by `api_source`, results use `agents_api` for attributed Agents API activity and `unlabeled` for all other activity. Without source grouping, `api_source` is null.
limit	query	integer	No	A limit on the number of buckets to be returned. Limit can range between 1 and 180, and the default is 7.
page	query	string	No	A cursor for use in pagination. Corresponding to the `next_page` field from the previous response.

Response 200 OK

{
  "object": "page",
  "data": [
    {
      "object": "bucket",
      "start_time": 0,
      "end_time": 0,
      "results": [
        {
          "api_source": "agents_api",
          "object": "organization.usage.completions.result",
          "input_tokens": 0,
          "input_cached_tokens": 0,
          "input_cache_write_tokens": 0,
          "input_cache_write_30m_tokens": 0,
          "input_cache_write_12h_tokens": 0,
          "input_uncached_tokens": 0,
          "output_tokens": 0,
          "input_text_tokens": 0,
          "output_text_tokens": 0,
          "input_cached_text_tokens": 0,
          "input_audio_tokens": 0,
          "input_cached_audio_tokens": 0,
          "output_audio_tokens": 0,
          "input_image_tokens": 0,
          "input_cached_image_tokens": 0,
          "output_image_tokens": 0,
          "num_model_requests": 0,
          "project_id": "string",
          "user_id": "string",
          "api_key_id": "string",
          "model": "string",
          "batch": true,
          "service_tier": "string"
        }
      ]
    }
  ],
  "has_more": true,
  "next_page": "string"
}

Get a free OpenAI API key → sponsored

Affiliate link - we may earn a commission, at no extra cost to you.