Module credential 

CoinAPI API key resolution and validation.

REST and WebSocket requests send the same key in the X-CoinAPI-Key header.

Constants

COINAPI_API_KEY

Environment variable read when no API key is configured.

Functions

is_valid_api_key

Returns whether an API key is non-empty visible ASCII, as HTTP headers require.

resolve_api_key

Resolves the API key from api_key, or from COINAPI_API_KEY when it is None.