One HTTPS call sends an email from your verified government domain. No SDK required.
In the dashboard, open API keys and create a key with the emails:send scope. Copy the tfm_k_live_ secret once.
Call https://govconnect.ke/v1/emails/ with an Authorization: Bearer tfm_k_live_... header and a JSON body (from, to, subject, html).
You get back an email id. Poll /v1/emails/{id} or wire a webhook to follow delivery.