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You can view detailed information about the LAAFFIC API, which includes SMS and voice APIs for all LAAFFIC products.

The LAAFFIC API has been fully upgraded to the new version. This upgrade maintains the same interface content while making several optimizations in documentation support, usage guidance, and user experience. The interface architecture has also been optimized and integrated, resulting in a further improvement in the access experience.

To further improve service consistency, we will gradually discontinue the old version of the API. The specific plan is as follows:

The new version will be updated starting January 19, 2026. The old version is expected to be discontinued on April 20, 2026. We recommend that you switch to the new API as soon as possible to enjoy better documentation support and a better user experience. For assistance, please contact technical support. See the old version: LAAFFIC API Old Version

Prerequisites

After logging in or registering a LAAFFIC account, you can view your API Key (API Key) and Application ID (App ID) on the console.

1. 01 If this is your first time using it, please contact your account manager or customer service staff Create an app ID for you
2. 02 After the application is created, you can use the "SMS/Voice App" view in menu

Application ID and API key are necessary to call the API to send messages.

Free trial

It only takes a few minutes to configure your API and start sending messages.

To learn how to try it out for free, please refer to the API access tutorial: IVR Group Call-Task-based Approach ｜ IVR Group Call-TTS-based Approach ｜ Call Center-CC SDK

Authentication

To ensure the security of API requests, the LAAFFIC API supports HTTP Basic Authentication.

Use your API Key as username and API Secret as password.After completing the LAAFFIC account registration, the system will automatically generate relevant credentials for you.

Error and response status codes

While using the API, you may encounter HTTP status codes or API error codes.

For complete descriptions, see the corresponding error and response status code descriptions.

Rate limiting and throttling

LAAFFIC's messaging and voice group calling API itself does not have a fixed call limit.

However, due to the rules of LAAFFIC and some external communication operators (such as telecommunications networks), actual requests may be rate limited.

Precautions for using WEB sending or voice group calling

When send volume or call volume exceeds expected thresholds:

• Requests may be rate-limited
• Messages or calls may fail to be delivered

We recommend that you pass "Create sending task" And split tasks/send them in batches, which can effectively avoid speed limit problems and improve the overall sending success rate.