• Developers

REST API or SDK

What is a REST API ?

A REST API is a low-level interface that allows you to interact with a application using HTTP requests.

Advantages of REST APIs

• Full control over request lifecycle
• Language agnostic (works in any stack)
• Lightweight and direct communication

Disadvantages

• More boilerplate code
• You must implement error handling and retries
• Slower to develop trading strategies

What is an SDK ?

An SDK is a wrapper around the REST API that provides prebuilt functions, models, and utilities.

Advantages of SDKs

• Faster development and easier onboarding
• Built-in authentication and retries
• Cleaner and more readable code

Disadvantages

• Less control over request flow
• Dependency on SDK updates
• May lag behind latest API features

REST API and SDK: Key Differences

Feature	REST API	SDK
Abstraction Level	Low-level	High-level
Ease of Use	Harder	Easier
Flexibility	Very High	Moderate
Development Speed	Slower	Faster
Maintenance	Manual	Handled by SDK

When to use REST APIs

Choose REST APIs if you are building:

• High-frequency trading systems
• Custom infrastructure requiring full control
• Cross-platform or multi-language systems

When to use SDKs

SDKs are better suited for:

• Trading bots and automation scripts
• Rapid prototyping of strategies
• Applications where developer speed matters more than low-level control

Clerusync SDK

The Clerusync SDK demonstrates how REST APIs can be wrapped into a developer-friendly interface. Instead of handling raw HTTP requests, traders can directly interact with market data and execution methods.

Conclusion

REST APIs and SDKs are not competitors, they are complementary tools. REST APIs offer power and flexibility, while SDKs provide speed and simplicity.