Deploying an Amazon Lex Bot on a Messaging Platform

This section explains how to deploy Amazon Lex bots on the Facebook, Slack, and Twilio messaging platforms.

Note

When storing your Facebook, Slack, or Twilio configurations, Amazon Lex uses AWS Key Management Service customer managed keys to encrypt the information. The first time that you create a channel to one of these messaging platforms, Amazon Lex creates a default customer managed key (aws/lex). Alternatively, you can create your own customer managed key with AWS KMS. This gives you more flexibility, including the ability to create, rotate, and disable keys. You can also define access controls and audit the encryption keys used to protect your data. For more information, see the AWS Key Management Service Developer Guide.

When a messaging platform sends a request to Amazon Lex it includes platform-specific information as a request attribute to your Lambda function. Use these attributes to customize the way that your bot behaves. For more information, see Setting Request Attributes.

All of the attributes take the namespace, x-amz-lex:, as the prefix . For example, the user-id attribute is called x-amz-lex:user-id. There are common attributes that are sent by all messaging platforms in addition to attributes that are specific to a particular platform. The following tables list the request attributes that messaging platforms send to your bot's Lambda function.

Common Request Attributes
Attribute	Description
channel-id	The channel endpoint identifier from Amazon Lex.
channel-name	The channel name from Amazon Lex.
channel-type	One of the following values: Facebook Kik Slack Twilio-SMS
webhook-endpoint-url	The Amazon Lex endpoint for the channel.

Facebook Request Attributes
Attribute	Description
user-id	The Facebook identifier of the sender. See https://developers.facebook.com/docs/messenger-platform/webhook-reference/message-received.
facebook-page-id	The Facebook page identifier of the recipient. See https://developers.facebook.com/docs/messenger-platform/webhook-reference/message-received.

Kik Request Attributes
Attribute	Description
kik-chat-id	The identifier for the conversation that your bot is involved in. For more information, see https://dev.kik.com/#/docs/messaging#message-formats.
kik-chat-type	The type of conversation that the message originated from. For more information, see https://dev.kik.com/#/docs/messaging#message-formats.
kik-message-id	A UUID the identifies the message. For more information, see https://dev.kik.com/#/docs/messaging#message-formats.
kik-message-type	The type of message. For more information, see https://dev.kik.com/#/docs/messaging#message-types.

Twilio Request Attributes
Attribute	Description
user-id	The sender's phone number ("From"). See https://www.twilio.com/docs/api/rest/message.
twilio-target-phone-number	The phone number of the recipient ("To"). See https://www.twilio.com/docs/api/rest/message.

Slack Request Attributes
Attribute	Description
user-id	The Slack user identifier. See https://api.slack.com/types/user.
slack-team-id	The identifier of the team that sent the message. See https://api.slack.com/methods/team.info.
slack-bot-token	The developer token that gives the bot access to the Slack APIs. See https://api.slack.com/docs/token-types.