Resend
The Resend integration lets Helios agents search the Resend API and call any endpoint to send email, check delivery status, and manage domains and contacts.
What your agents can do
Agents don't pick from a preset list of actions. They semantically search the entire Resend API and call whatever endpoint a task needs, using your connected API key. There is no fixed set of operations to choose from.
- Send single or batch transactional emails
- Retrieve the delivery status of a sent email
- Add and verify sending domains
- Manage audiences and contacts
- Send broadcasts to an audience
Authentication
| Method | Type | Description |
|---|---|---|
| Resend API key | API Key | Server-to-server authentication with the Resend API |
Resend API key
Generate an API key in your Resend dashboard (resend.com → API Keys) and paste it into the Resend credential in Helios. This key authenticates every request Helios sends to the Resend API. OAuth is not supported by this integration.
Triggers
Resend does not currently emit event triggers into Helios. Use it from Chat, or from a Workflow driven by a schedule, webhook, or manual run.
Notes
An agent can only do what your API key allows. Create a Resend API key with the permissions you need (for example, full access or sending-only); any operation beyond those permissions is rejected by Resend.
See the full endpoint list in the Resend API reference.
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