SMSVerifier API supports offset and limit parameters for pagination when listing virtual numbers per country, enabling precise control over results returned per request.
Pagination overview in SMSVerifier API
When developers interact with the SMSVerifier API to retrieve lists of available virtual phone numbers for SMS verification, the volume of available numbers can be large. To manage this effectively, the API implements pagination mechanisms. Pagination divides the complete list into manageable "pages" or subsets of data, reducing response size and improving performance. This is critical for applications that need to display or process virtual numbers per country without overloading network resources or client applications.
Pagination helps you request only a subset of virtual numbers at a time, improving response times and avoiding memory overload in your application.
SMSVerifier’s pagination is designed to be simple and flexible, using standard parameters that are common in RESTful APIs. This also ensures compatibility with a wide range of client implementations.
Key pagination parameters: offset and limit
The SMSVerifier API uses the following two main parameters for pagination:
offset: Specifies the starting index of the virtual number list to return. It is zero-based, sooffset=0starts from the first item.limit: Defines the maximum number of virtual numbers to return in a single API response.
By combining these two, you can request "pages" of data. For example, setting offset=20 and limit=10 fetches the numbers starting from the 21st entry, returning up to 10 numbers.
Always specify both offset and limit to avoid default behaviors that may not suit your pagination UI or batch processing needs.
These parameters are passed as query strings in the API request URL when listing available numbers for a given country code. Here’s the basic syntax:
https://smsverifier.com/api/virtual-numbers?country=us&offset=0&limit=20
Default pagination behavior
If you omit both offset and limit parameters, the API returns the first page of results with a default limit. The typical default limit is 20 virtual numbers per request. The offset defaults to 0, starting from the beginning of the list.
Not specifying pagination parameters can result in the API returning fewer numbers than expected, potentially leading to incomplete datasets or multiple requests to fetch all data.
Using the default behavior is suitable for quick lookups or simple tests, but for production applications or bulk processing, explicit pagination parameters provide better control and efficiency.
Best practices for paginating large datasets
Efficient pagination is key to smooth API integration. Here are recommended practices when working with SMSVerifier virtual numbers listings:
- Set a reasonable
limit: Avoid very high limits (e.g., >100) to prevent large payloads that slow down responses and increase bandwidth use. - Increment
offsetproperly: Calculate your next offset by adding the current offset and limit to paginate sequentially through the full list. - Monitor API rate limits: Frequent paginated requests can hit rate limits. Design your client to handle HTTP 429 responses gracefully with retries or backoff.
- Cache results: For stable datasets, cache paginated results to reduce API calls and enhance responsiveness.
Combining filters with pagination
The pagination parameters offset and limit can be combined with other query filters supported by the SMSVerifier API. For example, you may filter virtual numbers by country, service (WhatsApp, Telegram, etc.), or number type, and paginate the filtered list.
This makes it easy to build targeted queries such as:
https://smsverifier.com/api/virtual-numbers?country=gb&service=telegram&offset=40&limit=15
This request fetches 15 Telegram virtual numbers from the UK, starting at the 41st number in the filtered list.
Always apply pagination on the filtered results, not on the entire dataset, to get consistent and expected pages.
Example API usage for paginated virtual number listing
Here is a typical workflow for paginating through available virtual numbers per country using the SMSVerifier API:
-
Step 1 — Initial request
Make a request with
offset=0and your chosenlimit(e.g., 20) to get the first page of numbers. - Step 2 — Process response Display or store the returned numbers. The API response typically includes total count metadata to help determine if more pages exist.
-
Step 3 — Next page request
Increment
offsetby thelimitvalue and request the next page until all numbers are retrieved or your needs are met.
Using this approach, you can efficiently paginate through thousands of virtual numbers without overwhelming your system or the API.
Fast response
Limit pagination ensures lightweight API calls with quick results.
Country-specific
Filter numbers per country combined with pagination for targeted listings.
Flexible control
Offset and limit parameters let you tailor data retrieval to your application’s needs.
Frequently asked questions
What pagination parameters does SMSVerifier API support?
How do I specify the starting point for the list of numbers?
Can I control how many numbers are returned per API call?
Is there a default pagination behavior if I don't specify parameters?
Are there any rate limits or best practices for paginating through large datasets?
Can I combine pagination with filters such as country or service?
Where can I find detailed API documentation for pagination and listing numbers?
Ready to list virtual numbers with precision?
Explore SMSVerifier’s API with flexible pagination and filters to integrate virtual number verification smoothly.
Read the API docs