Build your product.
We’ll handle the email.

Sendar is the email API for application developers. Send your first message, understand the result and build a workflow you can rely on.

Your stack. One HTTP request.

Use Sendar from your server with a private API key. Start with a local preview, then verify your domain before a live send.

Before you start

01
Create your Sendar account
Open a workspace for your application’s email.
02
Add and verify your domain
Publish the DNS records shown in your dashboard. Keep existing mail records intact.
03
Create an API key
Store it in your server environment. Never expose it in a browser bundle.

Pick your starting point

Follow a guide for the language or framework you already use.

Node.js

Send with server-side JavaScript.

Next.js

Build a preview-first email route.

Python

Make a straightforward HTTP call.

Browse every quickstart

Explore the essentials

API reference

Requests, response examples and eight sample languages.

Authentication

Connect securely with a server-side Bearer key.

Domain checker

Inspect public SPF, DKIM and DMARC records.

Migration guides

Map your existing provider workflow before switching.

From a first send to production

Keep a stable identifier for each application event and record the returned message ID. Inspect status and available events when troubleshooting: provider acceptance is not proof of inbox delivery.

Use templates for repeatable content, webhooks for event updates and a controlled pilot when migrating. Our blog covers the engineering decisions behind these workflows.