# Api Key

All api require permission validation.you need to add "**bybtSecret**" in http request **header**.

```python
Python Code:

import requests

url = "http://open-api.bybt.com/api/pro/v1/futures/openInterest?interval={interval}&symbol={symbol}"

params = {}
headers = {
  'bybtSecret': 'apiKey'
}

response = requests.request("GET", url, headers=headers, data = params)

print(response.text.encode('utf8'))

```

```python
Curl Code:

curl --location --request GET 'http://open-api.bybt.com/' \
--header 'bybtSecret: apiKey'
```


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