# Klump API

**Canonical:** https://apis.io/apis/klump/klump-api/  
**Provider:** Klump — https://apis.io/providers/klump/  
**Base URL:** https://api.useklump.com  
**Documentation:** https://docs.useklump.com/docs

Klump API is published by [Klump](https://apis.io/providers/klump/) on the [APIs.io](https://apis.io/) network. Tagged areas include Payments, BNPL, Checkout, Transaction, and Webhook. The published artifact set on APIs.io includes API documentation and authentication docs.

The Klump REST API lets a merchant verify transactions, sync commerce product catalogs, create Klump Access hosted payment pages, and resend webhooks. A single base URL serves both sandbox and production; the environment is selected by whether the merchant application state is TEST or LIVE and by which secret key is presented. Every request must carry the merchant secret key in a klump-secret-key header; the public key (klp_pk_ prefix) is used client side with the Klump.js widget.

## Machine-readable artifacts (5)

- **Documentation** — https://docs.useklump.com/docs
- **Authentication** — https://docs.useklump.com/docs/api-keys-authorization
- **Sandbox** — https://docs.useklump.com/docs/test-card
- **Webhooks** — https://docs.useklump.com/docs/webhook-getting-started
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/klump/refs/heads/main/apis.yml

## Tags

Payments, BNPL, Checkout, Transaction, Webhook

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/klump/klump-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/klump/.