# Error 304: Market Fee Out of Range

PayMe's message with `language: "en"`: **Market fee is not in the allowed range**

`market_fee` or `market_fee_fixed` isn't a number, or is negative. `status_additional_info` holds the value.

## Usual causes

- A negative value: the sandbox answered HTTP 400 for `-1`.
- A value like `1%`.

## What to do

- Send a plain number. See [Platform Fees](/marketplaces-and-platforms/fees-and-payouts/platform-fees).

The full list of codes is on [Errors](/payments/getting-started/errors). If something else is going on, see [Troubleshooting by Symptom](/agents/errors/troubleshooting).