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Docs/Connections/Comms & email/Resend (transactional email)
Comms & email

Resend (transactional email)

1 min readUpdated October 27, 2026
Setup time
~15 min
Difficulty
moderate
Who bills
Resend

What it is

API key for sending transactional email through a domain you verify.

Why Hi5Agents uses it

Any agent that emails customers, sends briefs, or delivers newsletters uses Resend so the sender domain and reputation belong to you.

Agents unlocked

One Resend (transactional email) powers 8 agents. Typical cost $0–$20/mo.

InboxIQRequired

Sends customer replies from your domain.

NewsletterProRequired

Delivers newsletters at scale.

WelcomeWagonRequired

Sends the onboarding email series.

WarrantyBotRequired

Customer notifications about warranty status.

InvoiceCollectorRequired

Sends dunning and reminder emails.

RetainerXRequired

Sends retainer renewal and check-in emails.

TalentTrackRequired

Applicant confirmation and status emails.

ShopOpsUnlocks a mode

Cart-recovery emails via the InboxIQ sender. Store ops work without it.

Building a stack? Try the stack builder or open the full matrix.

Setup steps

  1. 1Create a Resend account at resend.com.
  2. 2Add and verify your domain (DNS records take 5–30 min to propagate).
  3. 3Generate an API key with Full access for your domain.
  4. 4Paste it into Hi5Agents → Settings → Keys → Resend.

Billing

Resend has a free tier (3k/mo); paid starts at $20/mo for 50k emails.

Provider docs ↗

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