protocol

The protocol that you want to use. Supported protocols include:

• http – delivery of JSON-encoded message via HTTP POST

• https – delivery of JSON-encoded message via HTTPS POST

• email – delivery of message via SMTP

• email-json – delivery of JSON-encoded message via SMTP

• sms – delivery of message via SMS

• sqs – delivery of JSON-encoded message to an Amazon SQS queue

• application – delivery of JSON-encoded message to an EndpointArn for a mobile app and device

• lambda – delivery of JSON-encoded message to an Lambda function

• firehose – delivery of JSON-encoded message to an Amazon Kinesis Data Firehose delivery stream.