# Klump

> Klump Technology Company Ltd is a Lagos, Nigeria based fintech. Its flagship product,
> Klump BNPL (Buy Now, Pay Later), lets shoppers spread the cost of a purchase over monthly
> instalments at online and in-store merchant checkouts. Merchants integrate through the
> Klump.js browser widget, a framework component, an e-commerce plugin, or the REST API at
> https://api.useklump.com.

Generated by the API Evangelist enrichment pipeline on 2026-07-19 from apis.yml and the
artifacts in this repository. Klump serves no llms.txt of its own (probed 2026-07-19:
useklump.com/llms.txt 404, docs.useklump.com/llms.txt 404).

## Key facts

- Base URL: https://api.useklump.com — one base URL for both sandbox and production.
- Environment is selected by the merchant application state (TEST or LIVE) plus the key pair used.
- Server auth: merchant secret key in a `klump-secret-key` request header. There is no OAuth.
- Client auth: merchant public key (`klp_pk_` prefix) passed as `publicKey` into the Klump.js object.
- Versioning: URI path, currently `/v1/`.
- Errors: plain HTTP status codes (200, 201, 400, 401, 403, 409, 429, 5xx) with a code and message. No RFC 9457 problem+json.
- Webhooks: three transaction events, HMAC-signed with `X-Klump-Signature`, retried hourly for 72 hours.
- Klump publishes no OpenAPI definition, no AsyncAPI document, no CLI, no status page, and no changelog.

## APIs

- [Klump API](https://docs.useklump.com/docs): verify transactions, sync Klump Commerce products, create Klump Access payment pages, resend webhooks.

## Documentation

- [Documentation home](https://docs.useklump.com/docs)
- [Getting started](https://docs.useklump.com/docs/getting-started)
- [Environments](https://docs.useklump.com/docs/environment)
- [API keys and authorization](https://docs.useklump.com/docs/api-keys-authorization)
- [Errors](https://docs.useklump.com/docs/errors)
- [Transaction verification](https://docs.useklump.com/docs/transaction-verification)
- [Payment pages (Klump Access)](https://docs.useklump.com/docs/payment-pages)
- [Product testing](https://docs.useklump.com/docs/product-testing)
- [Test credentials](https://docs.useklump.com/docs/test-card)
- [Webhooks: getting started](https://docs.useklump.com/docs/webhook-getting-started)
- [Webhooks: setting up](https://docs.useklump.com/docs/setting-up-webhook)
- [Webhooks: resend](https://docs.useklump.com/docs/resend-webhook)
- [Klump Commerce inventory management](https://docs.useklump.com/docs/inventory-management)
- [Plugins and libraries](https://docs.useklump.com/docs/plugins)
- [Developer portal](https://useklump.com/developers)

## Confirmed operations

- `GET https://api.useklump.com/v1/transactions/{reference}/verify` — verify a transaction before releasing value. Check `data.currency` and `data.is_live`.
- `POST https://api.useklump.com/v1/commerce/products/sync` — sync a merchant product catalog into Klump Commerce (path confirmed in Klump's own WooCommerce, Magento 2 and PrestaShop plugins).

## Libraries and plugins

- [klump-react](https://www.npmjs.com/package/klump-react) — `npm install klump-react`
- [klump-vue](https://www.npmjs.com/package/klump-vue) — Vue 2
- [klump-vue-3](https://www.npmjs.com/package/klump-vue-3) — Vue 3
- [klump-angular](https://www.npmjs.com/package/klump-angular) — AngularJS
- [klump-react-native](https://www.npmjs.com/package/klump-react-native) — React Native
- [klump/laravel-klump](https://packagist.org/packages/klump/laravel-klump) — Laravel
- [klump_checkout](https://pub.dev/packages/klump_checkout) — Flutter
- [Klump.js](https://js.useklump.com/klump.js) — hosted browser checkout library
- Platform plugins: [WooCommerce](https://github.com/Klump-Inc/wordpress-plugin), [Magento 2](https://github.com/Klump-Inc/klump-magento2-module), [PrestaShop](https://github.com/Klump-Inc/prestashop-plugin), [OpenCart 4](https://github.com/Klump-Inc/opencart-plugin)

## Repository artifacts

- authentication/klump-authentication.yml — auth profile
- conventions/klump-conventions.yml — cross-cutting semantics and idempotency
- errors/klump-error-codes.yml — published error reference
- asyncapi/klump-webhooks.yml — webhook event catalog
- sandbox/klump-sandbox.yml — published test credentials and test values
- packages/klump-packages.yml — first-party libraries and plugins
- components/klump-components.yml — client-side and hosted surfaces
- conformance/klump-conformance.yml — standards posture
- lifecycle/klump-lifecycle.yml — versioning and lifecycle
- security/klump-domain-security.yml — TLS/DNS posture
- well-known/klump-well-known.yml — /.well-known probe results
- mcp/klump-mcp.yml — candidate MCP tool surface

## Company

- [Website](https://useklump.com)
- [How it works](https://useklump.com/how-it-works)
- [Pricing](https://useklump.com/pricing)
- [Blog](https://useklump.com/blog)
- [Merchant sign up](https://merchant.useklump.com/sign-up)
- [GitHub](https://github.com/Klump-Inc)
- [Terms of service](https://useklump.com/legal/terms-of-service)
- [Privacy policy](https://useklump.com/legal/privacy-policy)