# Resend
URL: /reference/integrations/resend
Type: reference
Description: Send transactional emails from your workflows.
Keywords: resend, integration, api key, connect
Send transactional emails from your workflows.

Connect [#connect]

Connect Resend with an API key in **Settings → Integrations**. Open the Resend card, click **Connect**, and provide:

| Field   | Required | Notes         |
| ------- | -------- | ------------- |
| API Key | Yes      | e.g. `re_...` |

Supported actions and triggers [#supported-actions-and-triggers]

Actions [#actions]

| Block                                             | What it does             |
| ------------------------------------------------- | ------------------------ |
| [Send Email](/reference/blocks/resend-send-email) | Send an email via Resend |

Limits and failure modes [#limits-and-failure-modes]

* The connection can expire or be revoked. When it does, Resend blocks fail with an authorization error until you reconnect in **Settings → Integrations**.
* A disconnected or unconfigured integration makes its blocks unavailable in the Workflow Builder.

{/* TODO(docs): document Resend-specific rate limits and permission errors — not encoded in @stylo/core. */}

Related [#related]

* [Integrations overview](/integrations)
* [All workflow blocks](/reference/blocks)
* [Troubleshooting](/troubleshooting)