Currency not supported. INVALID_CURRENCY

kindly share the end point URL and the target environment 

the targetEnviroment was sandbox
I randomly used EUR and it worked fine. I was also informed that the sandbox uses EUR

Correct, 

Postman collection to guide you going forward 

MoMo OpenAPI Postman collection (getpostman.com)

Thank you

Hello, I encountered the same issue. I wonder, if the sandbox mode does not support any african currency? I tried with “XOF” and i got the same error currency not supported. 

 

PAYLOAD: 
{
  "plan": "pro",
  "billing_cycle": "monthly",
  "payment_method": "momo",
  "phone_number": "+2290196355621"
}


RESPONSE: 
{
    "status": "error",
    "error_code": "PAYMENT_GATEWAY_ERROR",
    "detail": "Échec de l'initiation du paiement: {\"message\":\"Currency not supported.\",\"code\":\"INVALID_CURRENCY\"}",
    "field_errors": {}
}

# Create payment record
payment = Payment.objects.create(
            organization=organization,
            user=user,
            plan=plan,
            billing_cycle=billing_cycle,
            payment_method=payment_method,
            amount=amount,
            currency="XOF",
            phone_number=validated_phone,
            subscription_start=start_date,
            subscription_end=end_date,
            expires_at=expires_at,
            metadata=metadata or {}
        )

Sandbox only supports EUR, the country specific currencies like UGX, XOF etc are for production.