Give your agents full access to Resend.
Agents compose and send transactional and lifecycle email from your own domain. Pair Resend with a database or CRM and an agent writes the message with the context each recipient deserves.
5,000 free credits to start.
Agent reach
Resend API v1
The full surface, searched at run time.
Connect with
- API key
Event triggers
Not yet
Manual, schedule, and signed webhook are available.
What the agent can do
What agents do with Resend
Helios searches the Resend API v1 at run time. The agent finds the endpoint the task needs and calls it.
- Search Resend's entire API surface at run time and call any endpoint your key allows.
- Send individual and batch emails from your verified domain.
- Compose HTML and plain-text bodies tailored per recipient.
- Manage audiences and contacts for lifecycle sequences.
- Read delivery events to confirm what landed and what bounced.
- Combine with database queries so each message reflects real account state.
Examples
Tasks you can hand to a Resend agent
Run an onboarding sequence that reads the account
The agent checks what each new account has actually done and sends the message that helps next.
Daily, email new accounts based on what they have set up so far.
- postgres·list accounts created in the last 14 days
- code·determine each account's next milestone
- resend·send 46 tailored emails
46 onboarding emails sent
- 19 nudged to connect their first integration
- 14 shown how to schedule a task
- 13 invited to add a teammate
Notify people when something needs them
Any agent that finds a problem can also tell the right person about it, with the detail they need to act.
When a nightly task finds a data issue, email the on-call analyst.
- postgres·run data quality checks
- code·summarize the 2 failing checks
- resend·email the on-call analyst
Data quality alert sent
- `orders.currency` null on 41 rows since 02:10
- Upstream job `ingest_orders` last succeeded at 01:55
Send a weekly customer digest
Each customer gets a summary of their own numbers, written from their own data.
Every Monday, send each account a digest of last week's usage.
- clickhouse·aggregate weekly usage per account
- code·write per-account narrative
- resend·batch send 312 digests
312 digests sent
- Each names the account's top workflow by runs
- 28 accounts told they are near a plan limit
Follow up on failed payments
When billing finds a problem, the agent writes a clear message with a working link and sends it from your domain.
For each failed charge, email the billing contact with an update link.
- stripe·list failed charges
- stripe·create hosted payment update links
- resend·send recovery emails
3 recovery emails sent
- Sent from [email protected]
- Each links a hosted update page
- Escalation scheduled if unpaid in 48h
Triggers
How a Resend workflow starts
Resend does not emit event triggers yet. Workflows that use it start by hand, on a schedule, or from a signed webhook.
Manual
Run it from the app with an optional JSON payload. Every workflow supports this.
Schedule
A cron expression or a plain sentence such as every weekday at 9am. Times are UTC.
Signed webhook
A public URL per workflow. Requests are signed with HMAC-SHA256 and expire after five minutes.
Works with
Resend works with the rest of your stack
One agent, one run, several services. It reads from one tool and writes to the next in the same sandbox.
Templates
Ready-to-run Resend workflows
Copy the prompt, connect your tools, and start a run.
Sales & RevOps
Failed payment recovery
Finds failed charges every hour, emails the billing contact a working update link, and escalates the accounts that matter.
Operations
Nightly data quality checks
Runs your invariants against production every night and emails the on-call analyst which rows broke and since when.
Use cases
Where Resend agents fit
Sales & RevOps
Lead enrichment
A signup or form response fires a webhook. The workflow enriches the person and company, scores fit against your definition, creates the CRM record, and tells the right rep.
Operations
Database reporting
A workflow reads your schema, writes the SQL, runs it, checks the results in its sandbox, and posts a report to the channel your team reads.
Operations
Billing operations
A workflow watches Stripe for failed charges and starts recovery. A second one reconciles what you billed against what your own database recorded after the books close.
FAQ
Questions, answered
Put an agent on Resend.
Connect it once and describe the task in chat. Then reuse the prompt as a workflow on a schedule or a webhook.