celar

About the Project

The Problem

Developers want to build applications using stablecoins, but in practice this is very hard to do. To support stablecoin payments, developers need to understand blockchain details such as gas fees, smart contracts, bridges, wallets, and user management. All of this adds a lot of complexity before a product can even work.

Because of this, many developers avoid building with stablecoins, even when stablecoins would clearly solve their payment problems.

Inspiration

Celar was inspired by the need to make stablecoin payments feel more like normal developer tooling. Developers should be able to focus on building products, not on managing blockchain infrastructure and edge cases.

The goal of this project is to hide the complexity of blockchain while still keeping the benefits of programmable money.

How We Built the Project

For this hackathon, we built a working payment flow using MNEE, a USD backed stablecoin on Ethereum. Celar provides a backend service that handles wallet management, transaction execution, and payment automation.

Developers interact with Celar through simple APIs. When a payment is triggered, Celar automatically sends MNEE on chain and returns a verifiable transaction hash. This allows applications, services, or agents to move money without manual steps.

To support users at scale, the system uses smart wallets to provide consistent and reliable payment execution. This makes it easier to manage users without exposing them to private keys or blockchain complexity.

Challenges and Learnings

One of the main challenges was finding a reliable way to manage users at scale while keeping the system simple. Traditional wallet management does not work well for automated systems or large numbers of users.

Another challenge was ensuring that payments were predictable and easy to verify during execution. Using smart wallets helped solve this by providing a stable and repeatable way to send transactions.

Through this project, we learned that programmable money becomes much more powerful when the infrastructure around it is simple and developer friendly. Even a small automation flow can unlock real use cases when payments are reliable and easy to integrate.

What This Enables

This project shows how MNEE can be used to power automated payments, agent driven commerce, and programmable financial workflows. Celar serves as an infrastructure layer that developers can build on to create more advanced payment systems in the future.

Built With

• apis
• gcp
• node.js
• typescript