Resend
#521 most-usedDeveloper-grade email API for transactional delivery
Resend is the email API built for developers who need reliable, high-deliverability transactional and marketing email at scale. Connect it to Actionist and your agents can send templated emails on trigger, manage audience contacts and segments, retrieve delivery status, and keep your subscriber lists clean — without touching a dashboard.
Eliminates manual work. Agents handle the full send-audit-bounce loop, contact sync, segment management, and compliance opt-out processing — work that previously required manual dashboard visits, CSV imports, and inbox monitoring.
What your Resend agent runs on autopilot
A week of scheduled jobs your Actionist agent will execute on your behalf.
Resend × every other app you use
End-to-end automations that span multiple apps — each one a real business outcome.
Proposal-sent notification with delivery confirmation
When a deal advances to Proposal Sent in HubSpot, the agent pulls the prospect's email from the CRM, calls Send Email via Resend to deliver the branded proposal cover email, then calls Get Email after 30 minutes to confirm delivery. If the email bounced, a Slack alert fires to the rep immediately so they can follow up by phone.
Time saved for your team — every week, on autopilot
Savings
What your team gets back — two angles: what you stop doing manually, and what that's worth.
What you do manually today
What your agent runs for you
- Sales20 min / weekManual bounce check after every send
Reps send proposal emails then check the Resend dashboard hours later to see if they delivered — by which time the prospect window has often passed.
Sales Agent0 minAgent confirms delivery and alerts on bounce within about a minuteAfter each proposal email, the agent calls Get Email to confirm delivery. If it bounced, a Slack alert fires to the rep immediately so they can pivot to a phone call.
- Marketing30 min / weekManual CSV import and segment setup before every campaign
Marketers export contacts from the CRM, clean the CSV, import into Resend, then manually build segments before each campaign — taking 2-3 hours of setup per launch.
Marketing Agent0 minAgent syncs contacts and segments automatically from the CRMThe agent creates contacts and segments in Resend whenever they appear or change in the CRM — campaigns launch into a pre-built, accurate audience every time.
- Customer Support15 min / weekManual opt-out processing with lag risk
Support agents paste opt-out emails into Resend manually, sometimes days after the request — risking a follow-up marketing email hitting an opted-out contact.
Customer Support Agent0 minAgent processes unsubscribes within about a minute of requestWhen an unsubscribe reply arrives, the agent calls Update Contact and sends the confirmation email — the contact is opted out before the next scheduled send runs.
- Human Resources25 min / weekManual new-hire email and audience setup
HR manually adds each new hire to Resend, builds the welcome email, and sends it — a 20-minute task for each new starter that often gets delayed past the first day.
Human Resources Agent0 minAgent creates contact, adds to segment, and sends welcome email automaticallyWhen a new employee appears in the HRIS, the agent creates the Resend contact, adds them to the new-hire segment, and sends a personalised welcome email — all before the first standup.
- Finance90 min / weekManual invoice email per client, one at a time
Finance sends each invoice email individually from Gmail, copying in the Resend template manually — 90 minutes of work at the end of every billing cycle.
Finance Agent0 minAgent batch-sends all invoices in a single Resend API callThe agent assembles personalised invoice emails for all clients and calls Send Batch Emails once — all invoices dispatched with delivery confirmation before the billing-cycle flag clears.
- Operations60 min / weekWeekly manual delivery health check in the Resend dashboard
An ops team member logs into Resend every Monday to pull delivery stats, copies numbers into a spreadsheet, and formats a report — an hour of work before the standup.
Operations Agent0 minAgent posts the delivery health report to Slack automaticallyThe agent calls List Emails each Monday, tallies delivered vs bounced, and posts the summary to #operations — the report is ready before the standup with no manual dashboard visit.
- Legal40 min / weekManual opt-out and compliance email audit
Legal manually searches Resend for each opt-out request, updates the contact, sends confirmation, and logs the action — a 30-minute process for each data-subject request.
Legal Agent0 minAgent processes GDPR opt-outs and confirms delivery for compliance noticesThe agent calls Update Contact for every opt-out request and Get Email for every regulatory send, logging each action to the compliance tracker — the full audit trail is complete without a dashboard visit.
Calculate what your team saves
Based on Resend's typical team usage — the visible tasks plus a few other automations the agent runs: ~2.5 hrs / person / week of admin work automated.
How to plug Resend into Actionist
Pick the connection method that suits your environment.
Connect with your Resend API key. Generate one in the Resend dashboard under API Keys — full-access keys work for all supported operations, or scope the key to only the permissions your agent needs.
Log in to Resend, go to API Keys, and click Create API Key.
Select 'Full access' or scope the key to Sending access and Audiences access. Give the key a name so you can identify it later.
Copy the key immediately — Resend shows it only once. Paste it into the API Key field in Actionist and click Test connection.
15 actions your agent can call
Read and write operations available to your Actionist agent.
Skills that pair with Resend
Reusable agent skills that work well alongside this app.
Use when building email features, emails going to spam, high bounce rates, setting up SPF/DKIM/DMARC authentication, implementing email capture, ensuring compliance (CAN-SPAM, GDPR, CASL), handling webhooks, retry logic, or deciding transactional vs marketing.
MCP servers that work with Resend
Connect Actionist to MCP servers built for or around this app.
Send, track, and manage transactional emails at scale