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Teach your coding agent to send email with Lettr

Lettr works with AI coding agents through agent skills installed with npx skills add.

Checked

What you can do

  • Install the right SDK and configure the API key
  • Send transactional email and author templates
  • Wire webhooks and diagnose delivery problems

How to set it up

Set your API key as LETTR_API_KEY. The install skill walks your agent through verifying a sending domain.

npx skills add lettr-com/lettr-skills

Requirements

  • A Lettr API key, set as LETTR_API_KEY
  • A sending domain verified in Lettr
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