Integrate Seamlessly with Dependable APIs
Have a reliable means for customers to pay later for your stores online or in-store.

Start building with our resources

Getting started
To begin using Klump as your preferred Buy Now, Pay Later solution, you must first create an account.

Test cards
We are committed to providing you with a seamless integration experience, so we encourage testing during the development.

Errors
For all of our transactions, Klump employs standard HTTP response codes. The error codes range from the 200s to the 500s.

API Keys & Authorization
Every API request to Klump's endpoints must include an API key, specifically the Klump secret key.
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You deserve to buy whatever you want without breaking the bank or dealing with inflated interest fees. With Klump, Now You Can!