Transactional email API
Sendaro
Sendaro is a transactional email API. Verify a domain, create an API key, and send with POST /api/emails.
Inspect send logs and signed webhooks in the dashboard.
Pro is $19/mo in the product catalog.
| Record | Status | Value |
|---|---|---|
| SPF | pass | v=spf1 include:amazonses.com |
| DKIM | pass | CNAME → ….dkim.amazonses.com |
| DMARC | pending | v=DMARC1; p=none; rua=mailto:… |
Product story
Everything between DNS and the send.
One control plane for domains, API keys, transactional email, logs, and webhooks.
Domains
SPF, DKIM, DMARC, and domain verification with clear DNS instructions and real check status.
Send API
POST /api/emails with a Bearer API key. HTTP only enqueues — workers call the provider.
Email logs
Inspect status and event timelines for every transactional send — no fake volume charts.
Webhooks
Signed customer webhooks for sent, delivered, bounced, rejected, and failed events.
API keys
Issue scoped Bearer keys for send and read. Revoke a key without rotating the whole workspace.
Credits & jobs
Credit ledger and durable BullMQ workers keep sending honest and auditable.
How it works
Four steps from empty workspace to a sent email.
No browser timers. HTTP never calls the provider. Durable jobs own the critical path.
01
Verify domain
Add your sending domain and confirm SPF, DKIM, and DMARC.
02
Create API key
Issue an rf_… key scoped to send and read emails.
03
Send
POST /api/emails — the worker delivers via mock or live providers.
04
Inspect
Watch status in Emails and receive signed webhook events.
Trust
Architecture you can inspect — not badges we invented.
Until third-party audits and customer references are public, we describe the controls that already shape the product.
Tenant isolation
Org-scoped authorization on every resource API. IDOR coverage is part of the definition of done.
Audit logs
Sensitive admin and billing actions append to an immutable audit trail with reasons.
Encrypted secrets
Provider credentials are encrypted at rest. Secrets never ship in the client bundle.
Webhook verification
Inbound provider and billing webhooks verify signatures before state changes.
Certification / customer logo placeholders — labeled empty until real assets exist. We will not invent SOC 2 seals or fake logos.
FAQ
Straight answers before you create a workspace.
Sendaro is a transactional email API for developers: verify domains, create API keys, send email, and inspect logs and webhooks.
No. Trust copy focuses on architecture — tenant isolation, audit logs, encrypted secrets, and webhook verification — with labeled placeholders until real assets exist.
One product catalog is stored in the database. The pricing page reads those rows. Subscription prices are still a draft. A measured Essentials rate of $0.16 per 1,000 comes from 2 sends.
No. Request handlers only enqueue jobs. Background workers perform provider sends and credit debits.
Ready to send?
Start free, verify a domain, and send the first email with an API key.