Summary
Credits power everything you do in Astra. Whether you’re sending a simple reply, sharing rich content like images or documents, or handling a voice agent call, each action uses a specific number of credits.
Knowing how credits are calculated makes it easier to plan your usage, manage your balance, and keep your service running smoothly without interruptions.
Instructions
How credits are used
Credits are deducted based on the type of action performed by the AI agent whether it is sending a simple text reply or performing an action. Below is a clear breakdown:
Simple text responses
1 credit = 1 simple text response
Every standard text reply or simple action consumes 1 credit.
Rich text responses, summary and advanced actions
3 credits = 1 rich response or action
Rich responses include:
Images
PDFs
Tables
Documents
Actions (including webhooks)
Each rich message or advanced action costs 3 credits.
Voice agent calls
5 credits = 1 minute of voice agent call
Credits are charged per minute of voice agent usage.
For example:
A 1-minute call uses 5 credits
A 2-minute call uses 10 credits
Additional credits
If your balance runs low, you can purchase additional credits to ensure continuous service.
Quick reference table
Activity | Credit usage |
Simple text response or action | 1 credit |
Rich response (images, PDF, table, docs) | 3 credits |
Voice agent call | 5 credits per minute |
How to purchase additional credits
Follow these steps to buy more credits:
1. Log in to your Astra account.
2. Go to Account and click on Plans.
3. Click on Add-ons and select the number of credits you want to purchase.
4. Click Continue to checkout to complete the purchase.
Once the payment is successful, the credits will be added to your account automatically.

