> For the complete documentation index, see [llms.txt](https://docs.bitsby.app/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bitsby.app/api-documentation/general-information.md).

# General information

You can get API key in [Integrations](https://dash.bitsby.app/integrations/list)

## Main features

* **Invoice management:** create, cancel, check status
* **Payment management**: list of payments, binding payment to invoice
* **Statistics**: get aggregated data by projects, by periods, by wallets, etc.
* **Billing**: project tariff plans, account balances

## Limitations

* **Number of requests**: no more than 1 request per second
* **Number of keys**: 10 per account

## Authorization of requests

To authorize each request to the API, your API key must be passed in the `Authorization` header.

An example of using the `Authorization` header in an API request:

```bash
curl -X POST https://api.bitsby.app/invoices/list \\
  -H "Authorization: Token MSvL2ltaDZdWVjmZURURMVWhqSJLT2NURjhL2Fla1Z1T1IxQTltKs1T3Ay"
```

### Server response

The API server response always comes in JSON format. Focus on the `result` parameter to determine if the request result is successful.

An example of the server response in case of a positive request result:

```json
{
    "result": "success",
    "data": .....
}
```

An example of server response in case of an error:

```json
{
    "result": "error",
    "data": "Requests too frequent"
}
```