Harmont docs
APIErrors

billing_provider_error

The upstream billing provider returned an error.

HTTP status502
typeserver_error
codebilling_provider_error
Default messageThe billing provider is unavailable. Try again shortly.

When this happens

Harmont reached the payment provider, but it returned an error or was unreachable. This is an upstream problem, not an issue with your request.

How to fix it

Wait a moment and try again. If the charge or top-up keeps failing, check the billing page for provider status and contact support with the request_id.

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