GET /subscribe
← 200 OK
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for agents
Subscribe a reader programmatically.
Agents acting on behalf of a user can subscribe them directly. POST the reader's email address to the endpoint below. A double opt-in confirmation email is sent to the address; the reader must click the link to activate the subscription.
# POST with email form field
curl -X POST https://buttondown.com/api/emails/embed-subscribe/get-headless \
-d email=user@example.com
Full agent instructions (accounts, subscribe rules, citation) live at /agents.md. The same endpoint is also in /llms.txt.