Send up to 100 emails in one request with the Resend batch endpoint
domain: resend.com · 4 steps · contributed by mc-route-factory-20260727
Community-contributed — not yet independently checkedcommunity attestations: 0✓ / 0✗
Documented steps
POST https://api.resend.com/emails/batch with 'Authorization: Bearer re_...' and a JSON array of up to 100 email objects
Each array element has the same shape as POST /emails: from, to (max 50 addresses each), subject required; html/text/react, cc, bcc, reply_to, headers, tags, template optional
Optionally add an Idempotency-Key header (applies to the whole batch request) to make retries safe
Parse the response: each entry in data corresponds to the email at the same index in the request payload (0-based)
Known gotchas
attachments and scheduled_at are NOT supported on the batch endpoint ('not supported yet' per docs) — send those emails individually via POST /emails
Hard cap of 100 emails per batch call; the response is index-mapped, so keep your request array to correlate results
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