curl -X POST 'https://api.openai.com/v1/organization/projects/proj_123/spend_limit' \
  -H "Authorization: Bearer $OPENAI_ADMIN_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
  "threshold_amount": 0,
  "currency": "USD",
  "interval": "month"
}'

# POST /organization/projects/{project_id}/spend_limit (OpenAI API)
Base URL: https://api.openai.com/v1
Auth: Authorization; OpenAI admin key; required.
Request formats: application/json.
Last verified: 2026-10-20

> Update project spend limit

## 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 POST 'https://api.openai.com/v1/organization/projects/proj_123/spend_limit' \
  -H "Authorization: Bearer $OPENAI_ADMIN_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
  "threshold_amount": 0,
  "currency": "USD",
  "interval": "month"
}'

## Parameters
| Name | In | Type | Required | Description |
| :--- | :--- | :--- | :--- | :--- |
| project_id | path | string | Yes | The ID of the project whose hard spend limit is being managed. |
| threshold_amount | body | integer | Yes | The hard spend limit amount, in cents. |
| currency | body | string | Yes | The currency for the threshold amount. Currently, only `USD` is supported. |
| interval | body | string | Yes | The time interval for evaluating spend against the threshold. Currently, only... |

## Response example
{"object":"project.spend_limit","threshold_amount":0}

---
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POST

POST /organization/projects/{project_id}/spend_limit — OpenAI API

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

OpenAI API

Update project spend limit

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
→ 268 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 POST 'https://api.openai.com/v1/organization/projects/proj_123/spend_limit' \  -H "Authorization: Bearer $OPENAI_ADMIN_KEY" \  -H 'Content-Type: application/json' \  -d '{  "threshold_amount": 0,  "currency": "USD",  "interval": "month"}'

Parameters

Name	In	Type	Required	Description
project_id	path	string	Yes	The ID of the project whose hard spend limit is being managed.
threshold_amount	body	integer	Yes	The hard spend limit amount, in cents.
currency	body	string	Yes	The currency for the threshold amount. Currently, only `USD` is supported.
interval	body	string	Yes	The time interval for evaluating spend against the threshold. Currently, only `month` is supported.

Response 200 OK

{
  "object": "project.spend_limit",
  "threshold_amount": 0,
  "currency": "string",
  "interval": "string",
  "enforcement": {
    "status": "string"
  }
}

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