2D Non-OTP Gateway Integration

I need a reliable, high-risk payment gateway for my e-commerce site that processes credit and debit cards in EUR without 3-D Secure or OTP prompts. The solution must work smoothly for high-risk transactions, offer solid fraud-monitoring tools, and come with clear API docs so I can hook it into my existing checkout flow quickly.

Please propose a gateway or merchant account you can set up for me, outline any rolling reserve or chargeback policies in advance, and be ready to handle a brief test run of live payments to confirm stability and settlement speed.

Acceptance criteria:
• Gateway credentials delivered and verified in production mode.
• Successful live card transaction in EUR with no OTP step.
• Clear integration instructions (API keys, endpoints, sample request/response).

If you’ve done similar high-risk integrations before, I’d like to see a quick example or reference.