Azure Forecast REST API特定订阅返回404错误，请求协助解决

I know it's super confusing when the error message tells you to use an API version you're already using—let's work through this step by step to get your forecast data for subscription cxxxxx-xxxx-xxx-xxxxxxxxxxxx8.

Quick Recap of the Issue #

You're using the 2019-10-01 version of the Azure Forecast REST API (marked as the latest) with this GET request:

https://management.azure.com/subscriptions/{subscriptionId}/providers/Microsoft.Consumption/forecasts?$filter={$filter}&api-version=2019-10-01

All other subscriptions return data fine, but this specific subscription throws a 404 with the contradictory message:

{'error': {'code': '404', 'message': 'Cost management data is not supported for subscription(s) cxxxxx-xxxx-xxx-xxxxxxxxxxxx8 in the provided api-version. Please use api-version 2019-10-01 or later. (Request ID: 0cd6dd95-642d-4de0-9f31-5b2897ef2c61)'}}

Troubleshooting Steps to Fix This #

• Verify the subscription type and eligibility
  Some Azure subscription types (like free trials, internal test subscriptions, or non-standard agreements) have limited or delayed support for Cost Management APIs.

  1. Log into the Azure Portal, navigate to this subscription, and check its type under the Overview tab.
  2. Confirm it's a supported type: Pay-As-You-Go, Enterprise Agreement (EA), Cloud Solution Provider (CSP), or other commonly supported plans. Niche or trial subscriptions might not have access to forecast data yet.

• Validate your API request parameters
  Small typos or invalid filters can trigger misleading 404 errors:

  1. Double-check that the subscription ID cxxxxx-xxxx-xxx-xxxxxxxxxxxx8 is 100% correct (no missing/extra characters, check for copy-paste mistakes).
  2. Test the request without the $filter parameter first to rule out filter syntax issues:

     https://management.azure.com/subscriptions/cxxxxx-xxxx-xxx-xxxxxxxxxxxx8/providers/Microsoft.Consumption/forecasts?api-version=2019-10-01
     

     If this works, your filter has an error (like invalid date ranges or malformed clauses).

• Check your permissions for the subscription
  Make sure your identity (user account or service principal) has the right access to pull cost data:

  1. In the Azure Portal, go to the subscription's Access control (IAM) tab.
  2. Confirm you have at least the Cost Management Reader or Reader role assigned. You can also use Azure CLI to verify:

     az role assignment list --assignee <your-email-or-service-principal-id> --subscription cxxxxx-xxxx-xxx-xxxxxxxxxxxx8
     

• Wait for data initialization (if it's a new subscription)
  Newly created subscriptions or ones where Cost Management was just enabled need time to populate data—this can take up to 24 hours.

  1. Check if you can view forecast data for this subscription in the Azure Portal's Cost Management + Billing section. If the portal doesn't show data either, wait a day and try again.

• Try the latest API version
  Even though the error says to use 2019-10-01 or later, there might be a compatibility quirk. Update your request to use the latest available API version (as of now, 2023-11-01):

  https://management.azure.com/subscriptions/cxxxxx-xxxx-xxx-xxxxxxxxxxxx8/providers/Microsoft.Consumption/forecasts?$filter={$filter}&api-version=2023-11-01
  

If none of these steps resolve the issue, you'll want to open a support ticket with Azure to check for backend-specific issues with this subscription.

内容的提问来源于stack exchange，提问作者Ravi