How to Build a Credit-Aware Verification Pipeline

In high-volume identity verification workflows, ensuring your service remains operational is just as critical as the verification results themselves. When integrating synchronous APIs like the eKYC Pro Unified Score or Per-call services, unexpected interruptions due to depleted account credits can lead to failed requests and degraded user experiences.

To build a more resilient integration, you should implement a pre-verification check that validates your account status before triggering a request. This guide walks through implementing a balance-aware gate for your verification pipeline.

Why Pre-Verification Checks Matter

Verifying an identifier is a decision-support step, not an authorization event. As noted in industry best practices, email verified is not authorization. Similarly, a successful API response is a signal, not a guarantee of service. By checking your available credits first, you create a "go/no-go" gate that prevents unnecessary API calls when your account balance is insufficient.

Step 1: Implement the Balance Query

Before executing a check—whether it is a single-service Per-call request, a Combo Check, or a Unified Score request—query your current balance using the /v1/balance endpoint.

Conceptual Workflow

1. Query Balance: Call the balance API to retrieve your current credit status.
2. Evaluate: Compare the returned balance value against the cost of your intended operation.
3. Conditional Execution: Proceed with the verification request only if the balance meets your defined threshold.

Example Integration Pattern

// Conceptual: Pre-verification check logic
async function safeVerificationRequest(identifier) {
 const balanceData = await fetch('https://api.ekycpro.com/v1/balance', {
 method: 'GET',
 headers: { 'X-API-Key': 'YOUR_API_KEY' }
 });

 const { balance } = await balanceData.json();

 if (balance > MINIMUM_REQUIRED_CREDITS) {
 // Proceed to call Unified Score or Per-call API
 return executeVerification(identifier);
 } else {
 // Handle insufficient credits gracefully
 throw new Error('Insufficient credits for verification');
 }
}

Step 2: Handling API Responses

When querying the balance, always account for the standard HTTP status codes. A 200 status confirms a successful retrieval of the balance field. If you receive a 401 (Unauthorized), verify your X-API-Key configuration. If you encounter a 502 error, treat the balance status as unknown and implement a fallback policy rather than proceeding with the verification request.

Best Practices for Operational Stability

• Decouple Signals: Keep your balance check logic distinct from your verification logic. The balance query is a management signal, while the registration or risk signals are decision-support outputs.
• Define Thresholds: Instead of checking for any positive balance, define a minimum credit threshold based on your typical usage volume to ensure you have enough headroom for batch or high-frequency operations.
• Monitor Failures: Log instances where the balance check fails or returns insufficient funds to trigger alerts for your operations team.

Conclusion

By integrating a balance-aware gate, you shift from reactive error handling to proactive operational control. This simple check ensures that your verification pipeline remains robust, preventing service disruptions and ensuring that your application only attempts verification when it has the necessary resources to complete the request.

For more details on the available endpoints, refer to the official documentation.

This article was drafted with AI assistance and reviewed before publishing.