Get Started with FEX Payments

Welcome! This guide will help you integrate FEX Payments and process your first transaction.

🧭 Overview

FEX Payments enables merchants to accept payments directly from customer wallets using QR-based flows or push approvals. You can integrate using:

POS terminals
Ecommerce flows
Mobile applications

⚡ Quick guide to start the integration (5 Steps)

1. Get Credentials

You will receive:

{
  "merchant_id": "...",
  "client_id": "...",
  "client_secret": "..."
}

⚠️ Store client_secret securely—it cannot be retrieved again.

2. Generate Access Token

Use OAuth2 client credentials:

curl -X POST https://auth.fex.example.com/... \
  -d "grant_type=client_credentials" \
  -d "client_id=..." \
  -d "client_secret=..."

Tokens expire in 5 minutes, so implement refresh logic.

3. Create a Payment

Call:

POST /merchant/api/v1/payment-intents

You’ll receive:

payment_intent.id
qr_code_url

4. Show Payment to Customer

Display QR code (Standard flow), or
Scan customer QR (Reverse flow)

5. Handle Webhook

FEX sends:

payment.completed

👉 Update your order only after receiving this event.

✅ Recommended First Integration

Start with: 👉 Standard QR Flow

🚀 Next Steps

Accept Payments →
Webhooks →
Refunds →

Getting started

Technical Guide

Get Started with FEX Payments

🧭 Overview

⚡ Quick guide to start the integration (5 Steps)

1. Get Credentials

2. Generate Access Token

3. Create a Payment

4. Show Payment to Customer

5. Handle Webhook

✅ Recommended First Integration

🚀 Next Steps

​🧭 Overview

​⚡ Quick guide to start the integration (5 Steps)

​1. Get Credentials

​2. Generate Access Token

​3. Create a Payment

​4. Show Payment to Customer

​5. Handle Webhook

​✅ Recommended First Integration

​🚀 Next Steps

🧭 Overview

⚡ Quick guide to start the integration (5 Steps)

1. Get Credentials

2. Generate Access Token

3. Create a Payment

4. Show Payment to Customer

5. Handle Webhook

✅ Recommended First Integration

🚀 Next Steps