If you wish to use the Exotel APIs, you will need to authenticate yourself. <your_api_key>, <your_api_token> and <your_sid> will help you do that. These details will be available in the API settings page.
By default your account belongs to Singapore cluster. So use the subdomain of Singapore cluster. If your account is created in Mumbai cluster, use the subdomain of Mumbai cluster.
- <subdomain> of Singapore cluster is api.exotel.com
- <subdomain> of Mumbai cluster is api.in.exotel.com
API settings page.