SpellSend is email infrastructure for engineering teams. Send with one API call and confirm every delivery, open, and bounce through a real-time event stream.
Sending, authentication, tracking, and governance in one coherent platform — not three services and the glue between them.
Send one message or five hundred in a single call. Predictable JSON, versioned endpoints, and error codes precise enough to act on in code.
Queued, delivered, bounced, opened, and clicked — every state emitted the moment it happens, to the dashboard or streamed to your systems.
Guided DKIM, SPF, and DMARC with custom MAIL FROM for strict alignment. Authenticated senders reach the inbox.
Version-controlled HTML with typed variables. Preview, publish, and reference by name across every application you run.
Delivery and engagement events posted to your endpoints with HMAC signatures. Verify provenance before your systems act.
Scoped API keys per app, per-key analytics, and consolidated governance. Run an entire portfolio from one control plane.
One authenticated, TLS-encrypted request sends mail and returns a tracking identifier you can follow through its full lifecycle.
// Send a transactional email const res = await fetch("https://api.spellsend.xyz/api/v1/emails/send", { method: "POST", headers: { "Authorization": "Bearer ss_live_xxxxx", "Content-Type": "application/json" }, body: JSON.stringify({ from: "Acme <noreply@acme.com>", to: "user@example.com", subject: "Reset your password", template: "password-reset", variables: { name: "Sam", link: resetUrl } }) }); // → { id: "msg_8f2a", status: "queued" }
The controls an enterprise evaluation asks for are already in place — identity, isolation, encryption, and a verifiable audit trail.
Start free and scale as your volume grows. Enterprise adds dedicated infrastructure and contractual guarantees.
Create an account, grab a test key, and send in the first 60 seconds — no domain setup, no credit card.
Migrating from another provider, or evaluating SpellSend for an enterprise deployment? Describe your requirement and we'll respond within one business day.