Build with KobKlein
Integrate payments, transfers, and financial services into your application with our powerful API and developer tools.
Everything You Need to Integrate
Our developer platform provides comprehensive tools for building financial applications on the KobKlein infrastructure.
REST API
Full-featured RESTful API with predictable resource-oriented URLs, JSON request/response bodies, and standard HTTP status codes.
Webhooks
Real-time event notifications for transactions, account updates, and compliance events delivered to your endpoint with retry logic.
SDKs
Official client libraries for Node.js, Python, PHP, and Java. Get started in minutes with idiomatic wrappers around every API endpoint.
Sandbox Environment
Fully isolated test environment with simulated transactions, test credentials, and mock data so you can build confidently before going live.
Simple, Powerful API
Send money, check balances, issue K-Cards, and manage accounts with clean, well-documented endpoints. Every response is consistent JSON with clear error codes.
curl -X POST https://api.kobklein.com/v1/transfers \
-H "Authorization: Bearer sk_live_..." \
-H "Content-Type: application/json" \
-d '{
"amount": 5000,
"currency": "HTG",
"recipient": "+509 3456 7890",
"description": "Invoice #1042"
}'Get Started in 4 Steps
Create Your Developer Account
Sign up at developers.kobklein.com and obtain your API keys. You will receive both test and production key pairs.
Explore the Sandbox
Use your test keys to make API calls against our sandbox. Simulate deposits, transfers, and K-Card payments with zero risk.
Build Your Integration
Use our SDKs or call the REST API directly. Configure webhooks to receive real-time updates about transaction states.
Go Live
Submit your integration for review. Once approved, swap test keys for production keys and start processing real transactions.
Documentation & Resources
API Reference
Complete endpoint documentation with request/response examples.
SDK Guides
Step-by-step setup guides for Node.js, Python, PHP, and Java.
Webhook Events
Full list of events, payload schemas, and retry policies.
Security Best Practices
Key rotation, IP whitelisting, and PCI compliance guidance.
Sandbox Recipes
Pre-built test scenarios for common integration patterns.
Changelog
Track API versions, deprecations, and new feature releases.
Need Help with Your Integration?
Our developer relations team is here to help. Get priority support, architecture reviews, and dedicated onboarding assistance.