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Adding a Second Application to Verify Without OTP Congestion

Onboard a second application to IOSOR Verify without congesting primary OTP routes. Implement rate isolation, JIT numbers, and prepaid sub-account tags.

Adding a Second Application to Verify Without OTP Congestion.

Multi-App Traffic Isolation on Shared Verify Infrastructure

Onboarding a secondary mobile or web application onto an existing Verify platform requires strict traffic segregation. When two independent applications share a single SMS transmission engine, unthrottled authentication requests from a newly launched application can saturate shared route queues. This results in delivery delays for time-sensitive OTP messages on your primary product. To prevent cross-application congestion, the IOSOR white-label CPaaS engine implements logical app-level isolation over unified infrastructure.

Configuring App-Specific Rate Isolation and Ledger Tags

To isolate throughput, configure discrete rate limits and burst thresholds within the platform control panel. By assigning application-specific tokens to every API request, the engine enforces velocity rules before dispatching messages to downstream networks. Ledger attribution operates on a single prepaid balance while partitioning cost tracking through sub-account tags. Platform operators maintain a USD 20 prepaid floor to guarantee uninterrupted token dispatch across all active apps.

Number Provisioning via JIT Allocation and Prepaid Holds

Dedicated inbound sender IDs and virtual numbers for two-factor authentication are dynamically provisioned using a Just-In-Time (JIT) model. Instead of pre-purchasing static pools, numbers are allocated in E.164 format on demand. When a new number is requested, a temporary prepaid hold is placed on the master ledger to cover the monthly recurring cost (MRC). Once carrier binding completes, the number is assigned to the designated application profile.

DLR Webhooks and Failover Handover Rules

Real-time delivery status reports (DLR) are essential for tracking token conversion across multiple apps. IOSOR routes granular DLR webhooks to app-specific endpoints, allowing developers to distinguish latency issues on the secondary app from core delivery metrics. If a primary SMS channel experiences degradation, the system triggers failover rules.

Operational Handover Checklist and Verification Routing

Before promoting the secondary application to production status, engineering teams must complete a formal handover protocol. Verify environment variables, double-check webhook endpoints, and execute end-to-end integration tests using live test traffic.

Start with IOSOR

Navigate to the IOSOR platform console to create a discrete application token for your secondary app and set distinct velocity and burst thresholds. Attach dedicated ledger tags to the secondary application's API request headers to isolate cost attribution and prevent cross-app rate saturation. Finally, configure app-specific DLR webhook endpoints and run a staging test with JIT number allocation before finalizing the handover.

IOSOR takeaway

Scaling multi-app authentication over shared delivery infrastructure requires logical segregation rather than duplicate underlying integrations. Enforcing app-specific rate isolation rules and assigning ledger tags ensures that spikes in secondary application traffic never congest primary OTP channels or compromise global delivery performance.

Do not route multiple applications through a single unthrottled API key or share delivery status webhooks across distinct product units. Always isolate velocity limits, mandate prepaid holds on dynamically provisioned numbers, and test app-level failover routes prior to promoting a new app to live production status.

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