Build with confidence
Everything you need to integrate InboxFlow into your application.
Send your first email in 2 minutes
Grab your API key, make one request, and you're shipping emails.
$ curl -X POST https://api.inboxflow.dev/v1/send \
-H "Authorization: Bearer if_key_..." \
-H "Content-Type: application/json" \
-d '{
"to": "user@example.com",
"subject": "Hello from InboxFlow!",
"html": "<h1>Welcome!</h1>"
}'import { InboxFlow } from 'inboxflow';
const iflow = new InboxFlow('if_key_...');
await iflow.send({
to: 'user@example.com',
subject: 'Hello from InboxFlow!',
html: '<h1>Welcome!</h1>',
});Guides & references
Comprehensive documentation to help you integrate quickly.
Quick Start
Send your first email in under 2 minutes.
API Reference
Complete API documentation with examples.
SDKs & Libraries
First-class SDKs for all major languages.
SMTP Setup
Configure your existing infrastructure to use SMTP relay.
Domain Setup
Configure DKIM, SPF, and DMARC for your sending domains.
Webhook Guide
Receive real-time delivery events via webhooks.
Deliverability Guide
Best practices for maximizing inbox placement.
Templates
Create and manage email templates with dynamic variables.
Migration Guides
Migrate from SendGrid, Mailgun, SES, and others.
Security
Authentication, encryption, and compliance documentation.
Pricing FAQ
Details on billing, overage, and plan limits.
Changelog
What’s new in InboxFlow.
SDKs & Libraries
First-class libraries for your favorite languages. Type-safe, well-documented, and regularly updated.
Start sending in under 2 minutes
No credit card. No onboarding call. No "talk to sales." Just one API key and you're shipping.