Forms
Subscribe to a project newsletter
Public endpoint — no API key required when called from a browser
embed. The project is resolved via the
X-NeuralDraft-Project-Key header (recommended for server-side calls)
or ?project_id=<id> query param (browser embeds where you can’t
ship a secret key). Idempotent — re-submitting an existing email
returns 200 with status="already_subscribed" rather than an error.
Free; no credits charged.
POST
Headers
Project API key (alternative to query param).
Query Parameters
Project ID for unauthenticated browser embeds.
Body
application/json
Response
Email already subscribed (idempotent).