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Myna runs on a credit-based system — instead of paying per message after the fact, you pre-purchase credits and spend them as your agents send messages and process AI responses. Every outbound message, inbound message, and AI generation draws from your credit balance, so you always know exactly how much capacity you have before launching a campaign.

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What Consumes Credits

Credits are deducted for three categories of activity:
Credits are denominated in internal units where **10 credits = 1.00USD∗∗.Forexample,sendingoneoutboundSMSsegmentcosts0.15credits(1.00 USD**. For example, sending one outbound SMS segment costs 0.15 credits (0.015).

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SMS Segments

SMS messages are billed per segment. Each segment holds up to 160 characters. A 320-character message counts as 2 segments and is charged at twice the per-segment rate.

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AI Generation Cost

When your agent generates a reply using its AI model (an LLM call), an additional 0.20 credits are added on top of the per-segment messaging cost. If a message is sent verbatim — for example, a pre-written campaign blast with no AI response required — the 0.20 AI generation charge does not apply.
For high-volume broadcast campaigns where every contact receives the same message, disable AI response generation and use a fixed message template. You’ll skip the 0.20 AI cost on every single message, which can save hundreds of credits on large contact lists.

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How Credits Are Deducted

Each time a message is sent or received, Myna calculates the cost as:
Free credits (promotional or trial credits) are spent first. Once your free balance is exhausted, paid credits are used. If your total balance drops to or below your auto-recharge threshold and you have auto-recharge enabled, Myna will automatically top up your balance using your saved payment method.
When your credit balance reaches zero, active campaigns are paused automatically. No messages are sent and no charges occur beyond your existing balance. Top up your credits to resume campaigns.

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Viewing Your Credit Usage Log

Navigate to Billing → Balance in your dashboard to see a full, paginated log of every credit deduction. You can filter the log by:
  • Channel — SMS, WhatsApp, HighLevel, or other
  • Direction — Inbound or Outbound
  • Campaign — Filter to a specific campaign by name
Each row in the log includes the following fields:
The credit usage log is available to all workspace users with at least user-level access. Only admins and owners can access billing management functions like purchasing credits.

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Credit Balance vs. USD

Your dashboard displays your credit balance alongside an equivalent USD value. Use the formula credits × $0.10 to convert any credit amount to dollars. For example, a balance of 500 credits equals $50.00 in messaging capacity.