Tutorial: Building a Scalable WhatsApp Business Account Verification Pipeline

Description and use

Automated verification of thousands of phone numbers for WhatsApp Business accounts using Checknumber.ai’s asynchronous API, enabling CRM segmentation.

Problem

Large CRM databases need to identify which contacts use WhatsApp Business accounts, but manual verification of thousands of numbers is impractical.

Outcome

The workflow enables automated verification of thousands of phone numbers for WhatsApp Business registration, producing a structured result file that can be directly imported into a CRM for targeted communication.

Workflow

• Submit a batch file of E.164 phone numbers to the /v1/tasks endpoint with task_type="ws_business" and receive a task_id.
• Poll the /v1/gettasks endpoint using the task_id until the status becomes "exported"; avoid aggressive polling intervals.
• Download the result file from the provided result_url; the file contains columns: number, whatsapp, business.
• Import the result file into the CRM, preserving original column names for data integrity.
• Handle edge cases by checking API response codes (e.g., 503, 400) and implementing retry logic with appropriate delays.

Evidence

The API uses an asynchronous pattern. You submit a file, receive a task_id, and poll for completion.

Source

Continue polling until the status transitions to exported.

Source