Email - Send a Message to a Single Recipient

POST https://{{et_subdomain}}.rest.marketingcloudapis.com/messaging/v1/email/messages/{{$guid}}

https://developer.salesforce.com/docs/atlas.en-us.mc-apis.meta/mc-apis/sendMessageSingleRecipient.htm

Sends a message to a single recipient via a send definition using a messageKey path parameter.

Request Body

{"definitionKey"=>"tapi-ena-welcome", "recipient"=>{"contactKey"=>"aaron.cates@salesforce.com", "to"=>"aaron.cates@salesforce.com", "attributes"=>{"FirstName"=>"Aaron", "Plan"=>"PPO"}}}