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From Approved to Spendable in Seconds: How Card Issuing Collapses the Lending Loop Into One System
Embedded finance

From Approved to Spendable in Seconds: How Card Issuing Collapses the Lending Loop Into One System

By Dmitri Bezsonov28 September 20265 min read
API Authentication: OAuth, API keys, and Security Best Practices
Embedded finance

API Authentication: OAuth, API keys, and Security Best Practices

By Dmitri Bezsonov23 September 20266 min read
Lending the Money Is the Easy Part. Controlling How It's Spent Is the Hard Part
Embedded finance

Lending the Money Is the Easy Part. Controlling How It’s Spent Is the Hard Part

By Wallester Blog23 September 20266 min read
REST API Design for Card Issuance: Endpoints, Methods, and Response Formats
Embedded finance

REST API Design for Card Issuance: Endpoints, Methods, and Response Formats

By Dmitri Bezsonov21 September 20267 min read
The Best Signal a Lender Can Have Is How the Money Gets Spent
Embedded finance

The Best Signal a Lender Can Have Is How the Money Gets Spent

By Dmitri Bezsonov18 September 20265 min read
ISO 8583 message
Embedded finance

ISO 8583 Message Format Guide: Structure, Data Elements, and Payment Transaction Flow

By Dmitri Bezsonov14 September 20267 min read
7 Things to Set Up Before You Hand an Employee a Company Card
Expense management

7 Things to Set Up Before You Hand an Employee a Company Card

By Denis Kaiukov07 September 20265 min read
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© 2026 Wallester AS All rights reserved.Wallester AS is a Payment Institution, authorized by the Finantsinspektsioon (Estonian Financial Supervision and Resolution Authority), and an official Visa Principal Member. Registration code: 11812882.