The API uses bearer authentication. Add the following header to each API HTTP request;
Authorization: Bearer <token>
Access tokens (aka API keys) can be created and managed via account settings.
Add token to create a new token. When adding a token, specify a name that reflects what the token will be used for.
Copy the value of the
Key field, which is uses for the authentication. Beware that the key is only displayed when creating an access token. If you loose this value, simply remove the token and create a new one.
Advanced options you can limit a key to specific folders. By default a key can access templates from any folder.
It's also possible to give a key super privileges, which allows you to create access tokens via the API. This is generally not recommended.