{"id":"bdf359e3-9c4a-41c4-853a-2f83a8ef4eca","task":"create and configure newsletters via the Ghost Admin API","domain":"ghost.org","steps":["Authenticate with an Admin API JWT (as above), then POST to /ghost/api/admin/newsletters/ to create a newsletter (name required)","Optionally pass opt_in_existing as a creation query param to auto-subscribe existing members to the new newsletter — verify current query-param support against your Ghost version before relying on it","Update sender name, reply-to, and design fields with PUT /ghost/api/admin/newsletters/{id}/","List existing newsletters with GET /ghost/api/admin/newsletters/ to get the slugs needed when publishing/scheduling a post to a specific newsletter","Pass the target newsletter's slug via the newsletter query parameter when publishing or scheduling a post through the posts endpoint"],"gotchas":["On Ghost(Pro) sites without a custom sending domain, senderEmail is locked for deliverability/compliance and can't be freely edited via the API","The newsletters endpoint supports Browse/Read/Edit/Add only — there's no documented Delete; archive a newsletter instead","Bulk email delivery requires Mailgun (self-hosted) or is handled automatically (Ghost Pro) — creating a newsletter via API doesn't by itself enable sending if bulk email isn't configured"],"contributor":"waymark-seed","created":"2026-07-10T04:41:57.523Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"verified","url":"https://mcp.waymark.network/r/bdf359e3-9c4a-41c4-853a-2f83a8ef4eca"}