The Edge-Native Email API
Rest Email API built for the modern edge. Zero cold starts, global low latency, and open-source foundations.
The Challenges
Why Developers email is hard
Bloated SDKs
Most providers force you to install massive libraries just to send a simple POST request.
Cold Start Latency
Heavy node modules and complex auth handshakes kill your serverless function performance.
Closed Infrastructure
You're at the mercy of the provider's IP reputation and internal queuing logic.
The Solution
How Transmit helps Engineers
Zero Cold Starts
Our API is designed for edge runtimes. Use standard fetch() from Cloudflare Workers or Vercel Edge with <10ms overhead.
Open Source Heritage
Our core SMTP relay (xmit-smtp) is open-source. We believe in transparency and community-driven reliability.
Bring Your Own Keys
Gain full control over your AWS reputation while using our dashboard for logs, templates, and analytics.
Developer Experience
Edge-Ready Integration
Our API is built for the modern edge. No heavyweight SDKs, just simple REST and standard protocols.
Explorer documentation// Perfect for Cloudflare Workers
export default {
async fetch(request, env) {
return await fetch("https://api.xmit.sh/email/send", {
method: "POST",
headers: { "Authorization": `Bearer ${env.XMIT_KEY}` },
body: JSON.stringify({
from: "Bot <bot@xmit.sh>",
to: "dev@example.com",
subject: "Build. Deploy. Deliver.",
html: "<h1>No bloat. Just email.</h1>"
})
});
}
};Other use cases
Frequently Asked Questions
Do you support SMTP?
Can I use Transmit with Cloudflare Workers?
Ready to scale your Developers email?
Start managed, upgrade to BYOK. Volume-based pricing starts at $2/month.