Hey there! Let's break down both of your questions to help you manage quotas and display usage info in your UI:

1. How to Check Google Cloud Vision API Quota Limits #

You’ve got two straightforward ways to view your Vision API quota:

Through the GCP Console #

• Log into your Google Cloud Console.
• Search for Quotas (under the IAM & Admin section) using the top search bar.
• In the Quotas dashboard, use the service filter to select vision.googleapis.com.
• You’ll see a full breakdown of quota types—like label detection requests, OCR calls, and per-minute rate limits. Each entry shows your current limit, used quota, and remaining allowance.

Via CLI or API (for automation) #

If you need to pull quota data programmatically:

• gcloud CLI: Run this command to list all Vision API quotas:

  gcloud services quota list --service vision.googleapis.com
  

  The output will include quota IDs, limit values, and current usage for every resource tied to the Vision API.
• Service Usage API: Use the services.quotas.list method, targeting vision.googleapis.com. This is perfect if you want to build quota checks directly into your application.

2. API to Query Vision API Call Counts in the Billing Cycle #

Yes! You can use the Cloud Monitoring API to fetch the total number of Vision API calls made in your current billing cycle. This data is easy to integrate into your UI to inform users about free vs. paid usage.

Key Details #

• The metric you’ll need is vision.googleapis.com/api/request_count—this tracks every API request sent to Vision.
• To get the total calls for your billing cycle, use the Monitoring API’s timeSeries.list method with these parameters:
  • Filter: Target Vision API requests with metric.type="vision.googleapis.com/api/request_count" AND resource.type="global"
  • Time Range: Set this to match your billing cycle (e.g., from the first day of the current month to the present).
  • Aggregation: Use ALIGN_SUM to calculate the total number of requests over the specified period.

Test with gcloud CLI #

If you want to verify this before building it into your UI, run this command (adjust the alignment period to match your billing cycle length):

gcloud monitoring metrics read vision.googleapis.com/api/request_count \
  --filter="resource.type='global'" \
  --aggregation.alignmentPeriod=2592000s \ # 30 days, tweak as needed
  --aggregation.perSeriesAligner=ALIGN_SUM

Integrating into Your UI #

Once you have the API set up to pull this data:

1. Fetch the total call count for the current billing cycle.
2. Compare it against your Vision API’s free quota limit (which you can retrieve using the quota methods from question 1).
3. Display a clear indicator in your UI—like a progress bar or a message showing how many free calls are left. When users get close to the limit, you can warn them that subsequent requests will generate charges.

内容的提问来源于stack exchange，提问作者lonkoenig