How can developers use virtual numbers to test SMS flows for new PayPal merchant account onboards?

Developers use virtual numbers to simulate PayPal SMS verification during merchant account onboarding, enabling automated testing without risking personal data or phone numbers.

What are virtual numbers and why use them?

Virtual numbers are phone numbers hosted in the cloud that can receive SMS messages without requiring a physical SIM card or mobile device. These numbers are accessible via web dashboards or APIs offered by service providers like SMSVerifier. They allow developers and businesses to receive SMS messages online, making them ideal for testing SMS-based workflows.

When onboarding a new PayPal merchant account, PayPal typically sends OTP (one-time password) or verification codes via SMS to confirm phone ownership and enhance security. Using virtual numbers allows developers to simulate this SMS flow repeatedly without tying it to a personal or company phone number.

Testing PayPal SMS verification with virtual numbers

To test PayPal’s SMS verification during merchant onboarding, developers typically follow these steps:

• Step 1 — Acquire a virtual number Select a virtual number from your provider, ideally from the country where the merchant account will be registered.
• Step 2 — Use the number in PayPal signup Input the virtual number in the PayPal merchant signup form to receive the SMS verification code.
• Step 3 — Retrieve the verification SMS Fetch the OTP message via your virtual number provider’s dashboard or API.
• Step 4 — Complete verification Enter the received OTP into PayPal to complete phone verification and proceed with onboarding.

This approach allows repeated and automated testing without manual phone handling, speeding up development cycles.

Integration workflow for developers

Developers aiming to fully automate PayPal merchant onboarding SMS testing can integrate virtual number services into their CI/CD pipelines or test frameworks. Here is a typical integration workflow:

Most providers, including SMSVerifier, offer REST APIs for:

• Listing available virtual numbers by country and service
• Purchasing or reserving numbers programmatically
• Retrieving incoming SMS messages in JSON or plain text
• Releasing or rotating numbers after use

Best practices and common pitfalls

While virtual numbers are powerful, there are several considerations developers must keep in mind to ensure reliable testing:

• Choose the right country code. Use virtual numbers from the country that matches your target merchant region to avoid SMS delivery failures.
• Monitor delivery status. Use provider APIs to verify SMS arrivals and trigger retries or alerts when SMS fails.
• Respect rate limits. Avoid bulk requests that may trigger anti-fraud measures on PayPal’s side.

Finally, consider the security implications of storing OTPs and virtual number data, especially when automating tests in shared or public environments.

Frequently asked questions