A Practical API for Teams That Ship Fast
Send OTPs, password resets, account alerts, invoices, and lifecycle messages from one API. Sendarix is designed for predictable behavior at scale, not fragile integrations.
Authenticate requests, submit messages, and track outcomes in one consistent pipeline. Every send can be observed through logs, events, and webhooks.
What You Get
The API is intentionally straightforward: create and send messages, inspect outcomes, and automate reactions. This helps product teams move faster without compromising reliability.
Fast REST Integration
Clear request/response patterns and predictable behavior for modern backend services and internal tools.
Message Lifecycle Tracking
Track accepted, delivered, bounced, and complained states so your product can react in real time.
Operational Visibility
Searchable logs and event streams reduce troubleshooting time when users report delivery issues.
Scale Without Rebuilds
From early-stage workloads to high-volume flows, keep one API contract as volume grows.
Template Data Injection
Pass dynamic variables cleanly so transactional templates stay consistent across products.
Idempotent Send Patterns
Prevent duplicate sends in retry scenarios with deterministic request handling strategies.
Typical API Flow
A simple pattern your team can implement once and reuse across all transactional scenarios.
1. Submit Request
Your service posts a message payload with recipient, template data, and metadata.
2. Validate & Queue
Input checks, suppression logic, and queueing happen before the delivery stage.
3. Deliver
Messages are routed to destination providers with controlled sending behavior.
4. Consume Events
Use webhooks and logs to update product state and trigger downstream automations.
Best Paired With
The Email API works especially well with Email Webhooks for real-time automation and Email Analytics for operational insight.
Who Uses It
SaaS products, platform teams, account systems, billing engines, and customer support workflows that depend on consistent email delivery.
Frequently Asked Questions
Can we use API and SMTP together?
Yes. Many teams use API for application workflows and SMTP for legacy systems during migration.
Do we get event data for each message?
Yes. Delivery, bounce, and complaint events are available for operational and product workflows.
Is this suitable for high-volume traffic?
Yes. The same API model is used from low-volume onboarding phases to sustained high-volume sending.
Do we need SPF, DKIM, and DMARC for API sending?
Authenticating your sending domain is strongly recommended. It improves how mailbox providers evaluate your mail and is a baseline expectation for production traffic.
How do API keys and permissions work?
You can issue keys for different environments or services and restrict what each key can do, so staging, CI, and production stay isolated.
What happens if our integration sends invalid or duplicate requests?
The API returns clear validation errors for bad payloads. For retries, use stable identifiers in your app layer so you do not accidentally double-send the same user-facing email.
Can we correlate API calls with downstream delivery?
Yes. Message identifiers and event timelines let you connect a specific API submission to accepted, delivered, bounced, or deferred outcomes.
Is the Email API a good fit for password resets and OTP codes?
Yes. These flows are classic transactional use cases: low latency expectations, high visibility requirements, and tight coupling to your auth or risk systems.
Should we use HTTPS only for API traffic?
Yes. TLS protects credentials and message metadata in transit. Treat API endpoints like any other production secret-bearing surface.
Ready to move to reliable email infrastructure?
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