A simple API to send transactional and product email. Low cost, easy to deploy, and built for organizations that just need email to work.
No credit card · 200 emails a day, free for 100 days
curl https://api.qsendyx.com/v1/emails \
-H "Authorization: Bearer qsy_live_•••" \
-H "Content-Type: application/json" \
-d '{
"from": "you@yourcompany.com",
"to": "user@example.com",
"subject": "Welcome aboard",
"html": "<h1>You are in.</h1>"
}'Why Qsendyx
Skip the enterprise complexity. Verify a sender, grab a token, and send.
REST endpoints with a token. Send in any language in a few lines.
SPF, DKIM and DMARC handled. Bounces and complaints tracked automatically.
Simple monthly plans by volume. Start free, scale when you grow.
Delivered, opened, clicked, bounced. All pushed to your app as it happens.
Confirm a single address or authenticate a whole domain in minutes.
Scoped API tokens, tenant isolation, built-in opt-out and STOP handling — LGPD compliance without the legwork.
Deliverability
Authentication and reputation decide where your email lands. We handle both, and tell you which one it was.
POST /v1/emails202Delivered to the inbox
Every outcome comes back as a webhook
Sent from our own MTA — SPF, DKIM, DMARC and forward-confirmed reverse DNS all in place, so mailbox providers trust the source before they even read the message.
Real-time events
The moment a message is delivered, opened, clicked, bounces or draws a complaint, the event is pushed to your endpoint — no polling, no guesswork.
Each delivery is signed, so your app can prove the event really came from us.
A failing endpoint is retried with backoff — you never silently miss an event.
The same events power delivery, open and click rates in your dashboard.
How it works
Confirm an email address or authenticate your domain.
Generate a scoped token, or a 7-day test token to try it out.
POST to the API and track delivery in real time.
Developer-first
Copy, paste, send. Client libraries optional.
Get startedcurl https://api.qsendyx.com/v1/emails \
-H "Authorization: Bearer qsy_live_•••" \
-H "Content-Type: application/json" \
-d '{
"from": "you@yourcompany.com",
"to": "user@example.com",
"subject": "Welcome aboard",
"html": "<h1>You are in.</h1>"
}'Pricing
Start free with 200 emails a day for 100 days. Move up only when you need more volume. No contracts, cancel anytime.
For trying Qsendyx out
200 emails / day
free for 100 days, then pick a plan
What's included
For small, steady sending
50,000 emails / month
then $0.0008 per extra email
What's included
Best price per email
150,000 emails / month
then $0.0006 per extra email
What's included
For high-volume senders
500,000 emails / month
then $0.0004 per extra email
What's included
Custom volume with dedicated support
Let's tailor it to your volume
What's included
Prices in USD, billed monthly. Only email sends count toward your quota.
FAQ
Everything you need to know before your first send. Still unsure? Talk to us.
The Qsendyx Email API is a tool that lets you send, track and manage email programmatically. Verify a sender, grab a scoped token, and send transactional or product email — welcome messages, receipts, one-time codes — with a single request. Dynamic templates, real-time delivery events and per-tenant isolation keep your mail in the inbox and your data your own.
Minutes. Create an account, confirm a single sender address (or authenticate a whole domain), generate an API token, and POST your first message. No sales call, no credit card — your trial gives you 200 emails a day for 100 days.
Simple monthly plans by volume, priced in USD. Every plan includes a monthly email quota that is already paid for by the subscription — sends inside your quota never touch your wallet. Only usage beyond the quota draws on prepaid credit. No hidden per-send fees, no surprise overages.
Yes. We guide you through SPF, DKIM and DMARC when you verify a domain, and we never send from an unverified sender. Bounces and complaints are tracked automatically and suppressed addresses are honored on every send, so your sending reputation stays clean.
Every message emits events — delivered, opened, clicked, bounced, complained — pushed to your endpoint in real time as they happen. Each delivery is signed and retried on failure, so you get an accurate, ordered picture of what reached your recipients without polling.
Tokens are scoped and shown only once, at creation — we store a hash, never the full secret. Every tenant is isolated at the database level, marketing and transactional streams are separated from the schema up, and we never log passwords, codes or provider credentials.
Yes, with campaigns and contact lists in the dashboard — kept strictly separate from your transactional stream so promotional volume never contaminates the reputation of your critical mail. Opt-in, unsubscribe and STOP handling are built in.
We are built for it. Qsendyx acts as a data processor on your behalf: consent, opt-out and STOP are handled on every send, suppressed recipients are never messaged, and data retention is bounded by your plan. Every tenant is isolated at the database level and we never log message content, codes or credentials — so meeting the LGPD is the default, not extra work.
Start free — 200 emails a day for 100 days. No credit card required.
Create your account