Optional load testing

Load testing is optional. Postman meets internal load test standards and has successfully supported multiple nationwide campaigns without any issues.

The purpose of load testing is to evaluate your system's capacity and performance when calling Postman's APIs, not to verify SMS delivery to recipients.

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Load Test Environment

All load testing must be conducted in the dedicated load test environment. Do not conduct load tests on the production or test environments.

	URL
Admin Portal	https://loadtest.postman.gov.sg
API Base URL	https://loadtest.postman.gov.sg/api/v2

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How Load Testing Works

SMS messages sent from the load test environment are processed only at the aggregator level and do not reach the telco level. This means:

• Messages will not be delivered to actual mobile phones

• Message status will remain Pending on Postman, not success

• Messages sent in the load test environment are not charged

The load test environment is designed solely for testing your system's capabilities under load conditions.

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Booking a Load Test

You must book a time slot before conducting any load test. Submit your booking at least seven days in advance. Otherwise, the Postman team will be unable to provide any support.

Step 1: Complete the booking form

Submit your booking request via the load test booking form.

Do not perform load tests outside your booked time slot. Conducting load tests during unapproved timeframes can affect other scheduled activities and hinder accurate test results.

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Do Not Use the Test or Production Environments for Load Testing

The test environment (test.postman.gov.sg) is for functional integration testing only, not load testing.

• The test site has a CSV file limit of 20 rows to prevent load testing

• Do not use "fake" numbers (e.g. 6590000000, 6599999999, 6588888888) on the test or production environments, as these are real numbers owned by members of the public

• Failed delivery attempts from fake numbers still incur charges and overload the telco queue

• Non-compliance will be reported to your agency's PIC and CIO