Mobile To Prefill API – Auto Fetch Customer Details Instantly
Mobile To Prefill API enables businesses to instantly fetch user details using a mobile number, reducing manual input and improving onboarding speed. Ideal for fintech, lending, insurance, and KYC workflows, this API helps you deliver a seamless, error-free, and secure user experience.
Smart Prefill
Onboarding APIRetrieved Identity Profile
Full Legal Name
Email Address
Primary Address
Kolkata, West Bengal - 700091
"full_name": "Rajesh Pal Datta",
"dob": "1994-05-12",
"email": "Rajesh.pal@gmail.com",
"address": {
"city": "Kolkata",
"zip": "700091"
}
Source: Telco-Auth-Provider
100% Secure & Real-time Mobile Number To Prefill API
Simplify user onboarding by automatically prefilling customer information. Enhance conversion rates with seamless mobile-linked data retrieval.
1. Enter Mobile
Submit the user's mobile number to our secure encrypted API endpoint.
2. Fetch Data
Our system securely matches the number and retrieves verified user profile details.
3. Prefill Form
Automatically populate form fields with accurate user data in <200ms.
Why Use Mobile Prefill API?
Reduce drop-offs and manual entry errors by providing a frictionless, one-click onboarding experience for your customers.
Higher Conversion Rates
Minimize user friction by reducing the number of fields customers need to type manually.
Enhanced Data Accuracy
Fetch verified information directly from telecom and credit sources to eliminate typos and fake data.
Seamless Onboarding
Create a "magic" experience where users see their name and details appear instantly after entering their phone number.
Real-time Verification
Simultaneously verify the active status of the mobile number during the prefill process.
Data Privacy Focused
All data is handled via secure, encrypted channels ensuring compliance with global privacy standards.
Easy SDK Integration
Standardized RESTful API that works seamlessly across web, iOS, and Android platforms.
Advanced Features for User Onboarding Optimization
Our Mobile Prefill API is engineered for high-growth companies looking to maximize user acquisition and data integrity.
Automated KYC Readiness
Pre-populate identity fields including Name, Email, and Address. Perfect for streamlining credit card applications and insurance sign-ups.
Instantaneous Response
Low-latency data fetching ensures the form is ready before the user even moves to the next field, preventing any lag in the UX.
Verified Data Sources
Cross-reference mobile numbers with telco records to ensure the prefilled data belongs to the actual owner of the device.
Trusted across Digital Ecosystems
Seamless user identification is the foundation of modern digital growth. Our API powers onboarding intelligence for the most high-volume mobile apps and registration platforms in the market.
🔐 Key Features of Mobile Number To Prefill API
Accelerate user onboarding with real-time profile data retrieval. Maintain full control over data accuracy and ensure a frictionless registration experience for millions of users instantly.
Instant Prefill
Sub-200ms execution times for immediate data retrieval from mobile numbers.
Verified Identity
Direct carrier-level integration to ensure accurate user profile and name matching.
Carrier Sync
Live network checks that verify SIM activity and current subscription status.
Secure Handshake
Protect user privacy with encrypted data transfers and consent-based flows.
Universal SDKs
RESTful endpoints with native SDKs for easy integration into mobile and web apps.
Global Coverage
High-concurrency infrastructure supporting multiple network providers worldwide.
Churn Reduction
Enhance sign-up rates by automating the population of complex form fields.
Real-time Analytics
Detailed logs and dashboards for tracking successful prefill and conversion metrics.
How Prefill API Works
Populate user profiles and streamline onboarding in four simple, automated steps.
Enter Number
User inputs their mobile number into your application’s entry field.
Network Lookup
Our API queries telco databases to match the mobile number with verified records.
Data Fetch
Retrieve authorized user data including legal name, email, or address details.
Auto-Fill
Structured JSON data instantly populates your registration form fields.
Why IDSPay is Better than Other Mobile To Prefill APIs?
See how we outperform the industry standards.
Faster Response
Lower latency and faster data retrieval than competitors.
Superior Uptime
More reliable service stability than Eko & API Mall.
Cleaner Docs
Easier to read and implement compared to Digitap.
Affordable Pricing
Cost-effective plans tailored for growing startups.
Dedicated Support
Real human experts ready to help you with any integration hurdles 24/7.
Integrate Mobile Prefill API in Minutes
Auto-populate user profiles and streamline onboarding. Fully documented SDKs for Node.js, PHP, Python, and Java.
curl --request POST \
--url https://api.idspay.in/v3/mobile/prefill \
--header 'Authorization: Bearer YOUR_API_KEY' \
--header 'Content-Type: application/json' \
--data '{
"mobile_number": "9876543210",
"country_code": "+91"
}'{
"status": "SUCCESS",
"data": {
"mobile_number": "9876543210",
"full_name": "John Doe",
"email": "john.doe@example.com",
"address": "123 Tech Park, Bangalore",
"is_verified": true,
"timestamp": "2026-04-13T10:54:20Z"
}
}Why We Are The Better Choice
Compare our performance and see why top fintechs trust our infrastructure.
| Feature | 🚀 Our API | Other Providers |
|---|---|---|
| Accuracy |
99.9% (Govt. Direct)
|
~85-90% (Scraped)
|
| Speed |
< 500ms
|
2 - 5 Seconds
|
| Pricing |
Pay-per-use (No Fixed Fee)
|
High Monthly Commitment
|
| Support |
24/7 Priority Support
|
Email-only (48hr TAT)
|
* Based on internal benchmark tests and competitor analysis (April 2026).
Frequently Asked Questions
Common developer queries about integrating the Mobile Number To Prefill API.
1. What is the Mobile Number To Prefill API?
This API allows businesses to automatically populate user registration forms by fetching verified data associated with a mobile number. It streamlines onboarding by reducing manual entry and improving data accuracy.
2. How reliable is the prefill data?
Our API utilizes direct carrier-layer integrations and verified identity databases. The information retrieved is cross-referenced with official records to ensure high match rates and reliable profile population.
3. Which user details can be retrieved?
Depending on the region and user consent, the API can return details such as the user's full name, email address, date of birth, and registered residential address to pre-fill your application forms.
4. What is the format of the response?
The API returns a standard JSON object containing the profile attributes, verification status, carrier information, and a request reference ID for tracking and audit purposes.
5. What is the average latency?
Our low-latency infrastructure typically returns prefill data within 200-500 milliseconds, ensuring the user experience remains fast and fluid during the sign-up process.
6. Can this be used for KYC purposes?
Yes, it serves as an excellent first step for KYC. While it populates the information, it also confirms that the mobile number is active and tied to a legitimate identity, reducing fraud at the entry point.
7. Which mobile networks are supported?
We support all major telecom operators across India. Our system is designed to handle cross-network requests seamlessly through centralized carrier nodes.
8. Is user privacy protected?
Absolutely. Data is transmitted via secure, encrypted channels. We strictly adhere to data privacy regulations and ensure that information is only retrieved with appropriate authorization.
9. What are the pricing and volume limits?
We offer tiered pricing based on the number of successful prefill requests. Custom high-throughput plans are available for enterprise clients with significant onboarding volumes.
10. How do I get started with the Prefill API?
Create an account on the IDSPay developer portal, complete the standard onboarding, and obtain your API keys. You can begin testing in our sandbox environment immediately.