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

# Create top-up

> POST /topup/create/{method}

Create a crypto top-up invoice.

```
POST https://api.heyaskr.ai/topup/create/{method}
```

## Path parameter

<ParamField path="method" type="string" required>
  One of `usdt`, `btc`, `eth`, `sol`.
</ParamField>

## Body

<ParamField body="amount" type="number" required>Amount to add.</ParamField>
<ParamField body="currency" type="string" default="USD">Currency of `amount`.</ParamField>

## Response

<ResponseField name="invoice_id" type="string">Use to poll status.</ResponseField>

<ResponseField name="payment_request" type="string">
  The address or payment URI to pay.
</ResponseField>

```json theme={null}
{ "invoice_id": "inv_...", "payment_request": "0x8f3a...c21b" }
```