> ## Documentation Index
> Fetch the complete documentation index at: https://docs.chartcastr.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Resend source

> Connect Resend to Chartcastr for automated transactional email charts. Monitor delivery volume, bounce rates, and email status trends over time.

## Overview

Use Resend as a data source for Chartcastr. Connect your Resend account with an API key and Chartcastr will pull email delivery metrics to generate charts delivered automatically to Slack or email.

Chartcastr connects with read-only access to your Resend account — it only needs permission to read email analytics data.

## Setup

<Steps>
  <Step title="Create a Resend API Key">
    In Resend, go to **API Keys** ([direct link](https://resend.com/api-keys)) and create a new key. Copy the key — you'll need it in the next step.

    <Info>
      The API key starts with `re_`. You only need read-level access for Chartcastr to pull email metrics.
    </Info>
  </Step>

  <Step title="Connect in Chartcastr">
    In Chartcastr, go to **New Source** and select **Resend**. Enter your API key and click **Test & Connect Resend** to validate the connection.
  </Step>

  <Step title="Select a metric">
    Choose which email metric to track. Each metric becomes its own source. You can add multiple sources to track different aspects of your email delivery.
  </Step>

  <Step title="Create a connection">
    Pick or add a destination (Slack channel or email), set the delivery frequency, and optionally enable AI summaries.
  </Step>
</Steps>

## Available Metrics

<CardGroup cols={2}>
  <Card title="Email Volume" icon="envelope">
    Track emails sent per day over the last 30 days.
  </Card>

  <Card title="Delivery Health" icon="check-circle">
    Stacked breakdown of delivered, bounced, and complained emails per day.
  </Card>
</CardGroup>

<Card title="View all available charts" icon="list" href="/integrations/sources/resend/available-charts">
  See the full list of Resend metrics with chart types and descriptions.
</Card>

## Next Steps

<CardGroup cols={2}>
  <Card title="Slack destination" icon="slack" href="/integrations/destinations/slack">
    Deliver Resend charts to your Slack channels with AI summaries in the thread.
  </Card>

  <Card title="Email destination" icon="envelope" href="/integrations/destinations/email">
    Schedule Resend delivery reports to any inbox or distribution list.
  </Card>
</CardGroup>