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Resend

Resend Integration

Email for Developers

Resend integration

Author: Giles Dawe
3 min read
Updated August 2026
One API key. One audience. Giveaway entrants sync to Resend automatically — minimal config, zero bloat. The fastest email integration you'll set up.

What it does

Tokei connects to the Resend API and adds every giveaway entrant to your audience as they enter. Email, first name, last name — that's what syncs. Clean and lightweight.

Resend doesn't try to be a full marketing platform. It's email infrastructure for developers who want to send great emails without the overhead. This integration matches that philosophy — minimal moving parts, reliable sync.

How it works

The setup is exactly what you'd expect from Resend: straightforward. One API key (starts with re_), one audience. Done.

API Key

Resend → Settings → API Keys. Create a key — it starts with re_

Audience

Create or select an audience in Resend for your giveaway contacts.

Paste both into your Tokei promotion settings, hit connect, and entrants start syncing. Full details in the Resend setup docs.

Why it matters

If you're a developer or technical founder, you probably don't want a bloated marketing platform with a hundred features you'll never touch. Resend gives you email sending with a clean API, beautiful templates, and nothing else in the way.

The Tokei integration fits that same mold. No complex configuration, no field mapping wizards, no segmentation builders. Entrants go into your audience. You decide what to do with them from there.

What gets synced

FieldValue
emailEntrant email address
first_nameFirst name when provided
last_nameLast name when provided

Lean and intentional. Resend audiences are contact lists — the data model is simple by design.

Common questions

My API key is rejected

Resend keys start with re_. If yours doesn't, you're likely pasting something else. Generate a fresh key in Settings → API Keys.

Contacts not appearing in my audience

Confirm the audience exists in Resend before connecting. Then submit a fresh test entry — the contact should appear within seconds.

Can I trigger emails when someone enters?

Resend audiences are contact stores — email sending is handled through Resend's send API or integrations. Use a webhook or Resend's broadcast feature to email new contacts.

Start syncing entrants to Resend

One key, one audience, zero bloat. Giveaway entrants flow into Resend automatically.