> ## Documentation Index
> Fetch the complete documentation index at: https://docs.meum.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Amounts and currencies

> How Meum handles fiat amounts and supported currencies.

## Amount format

All API amounts are **decimal strings** (e.g. `"100.00"`, `"49.99"`).

## Currency

* Default currency: **USD**
* Non-USD currencies may be converted to USD for platform limits and checkout quoting
* Allowed currencies depend on platform and store configuration

## Platform limits

Payment amounts are validated against platform-configured minimum and maximum USD equivalents. Exceeding limits returns an error at invoice creation.

## Related pages

* [Exchange rate handling](/payments/exchange-rate-handling)
* [POST /v1/invoices](/api-reference/overview)