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Use when working with the Resend email API — sending transactional emails (single or batch), receiving inbound emails via webhooks, managing email templates, tracking delivery events, managing domains, contacts, broadcasts, webhooks, API keys, automations, events, viewing API request logs, or setting up the Resend SDK. Always use this skill when the user mentions Resend, even for simple tasks like "send an email with Resend" — the skill contains critical gotchas (idempotency keys, webhook verifi
Passed 22 of 22 test cases with the skill, and 14 of 22 without it.
and 9 more in the full report
8 fixed14 passed either way0 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
This benchmark measured an earlier version of the skill.
One of 8 test cases the skill fixed. Same model, same prompt, with and without the skill.
I am configuring a transactional email call using the Resend SDK. I want to use a saved template alias `welcome-v2` and also provide a fallback inline `html` string in the same `emails.send()` payload. Show the correct API call payload.
| Checked | Without skill | With skill |
|---|---|---|
| Omits the html parameter when specifying a template parameter in the send request | Missed | Passed |
The instructions your model reads when the skill loads.
import { Resend } from 'resend';
const resend = new Resend(process.env.RESEND_API_KEY);
const { data, error } = await resend.emails.send(
{
from: 'Acme <[email protected]>',
to: ['[email protected]'],
subject: 'Hello World',
html: '<p>Email body here</p>',
},
{ idempotencyKey: `welcome-email/${userId}` }
);
if (error) {
console.error('Failed:', error.message);
return;
}
console.log('Sent:', data.id);
Key gotcha: The Resend Node.js SDK does NOT throw exceptions — it returns { data, error }. Always check error explicitly instead of using try/catch for API errors.
import resend
import os
resend.api_key = os.environ["RESEND_API_KEY"]
email = resend.Emails.send({
"from": "Acme <[email protected]>",
"to": ["[email protected]"],
"subject": "Hello World",
test cases passed, vs 14 / 22 without
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