
Aadhaar eKYC Integration: Who Can Use It and How It Works
The ways to verify identity with Aadhaar: online authentication and eKYC, offline verification, DigiLocker and the Aadhaar app. Who is permitted, and the storage rules.
What we have learned shipping AI systems, SaaS platforms and industry software — including the parts that went wrong. Written by Purushottam Kumar Suman.

How WhatsApp Business Platform pricing works in India, message categories and the customer service window, plus setup steps, templates, webhooks and the direct versus BSP decision.

The ways to verify identity with Aadhaar: online authentication and eKYC, offline verification, DigiLocker and the Aadhaar app. Who is permitted, and the storage rules.

How UPI AutoPay mandates work, the limits, pre-debit notifications and retry rules, and how to integrate recurring payments through a payment aggregator or bank.

How DigiLocker integration works for KYC: becoming a requester, the consent flow, which documents you can pull, legal validity, direct versus aggregator access and cost.

The data sources a fleet system can integrate in India: FASTag toll transactions, GPS devices, SIM-based tracking, VAHAN and Sarathi records and the ULIP platform.

What ABDM integration involves for a hospital system or health app: ABHA, the HIP and HIU roles, consent, FHIR records, registries and what to build in each layer.

E-way bill rules that software must encode, how API access works, the main API operations, validity and extension logic, and what transporters and shippers should build.

Who must generate e-invoices, how IRN generation works, access through a GSP or directly, the API flow, validations, cancellation rules and common integration errors.

How ONDC works, the choice between joining through a seller app and building your own, the protocol flow, testing and what the integration demands of catalogue, orders and logistics.

How India's Account Aggregator framework works: FIPs, FIUs, consent artefacts, who can participate, the integration flow and what to build for lending and wealth use cases.

The steps from ABDM sandbox registration to production keys: building each milestone, functional testing, the WASA security audit, sandbox exit and realistic timelines.

How to choose between Razorpay, Cashfree Payments and PayU: what to compare, where each is strong, the integration flow common to all three and mistakes to avoid.

If one of these describes a problem you have,
bring it to a call and we will talk it through.