Resend connector

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Prerequisites

• A Resend account with a verified domain (or Resend’s test domain for development)
• A Resend API key with send permissions
• A default From address on that verified domain
• project_contributor access

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Connect in AgentRuntime

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What you can build

• Workflow completion alerts — After a run succeeds or fails, send_email with run ID, step summary, and a link to Command Center.
• Weekly digest — Postgres postgres_query for metrics → LLM narrative → send_email to stakeholders.
• Human task reminders — When a human_task is assigned, email the assignee with task title and due date.
• Audience sync reporting — list_audiences to verify list IDs before syncing contacts from ActiveCampaign or a form webhook.

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Tools

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Example

{
  "id": "notify-complete",
  "type": "mcp_call",
  "name": "Email run summary",
  "tool_name": "send_email",
  "tool_args": {
    "to": "ops@example.com",
    "subject": "Workflow finished: {{input.workflow_name}}",
    "html": "<p>Run <strong>{{input.run_id}}</strong> completed.</p>"
  },
  "timeout_s": 30
}

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Configuration

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Troubleshooting

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Related

• Integrations quickstart
• Gmail connector — send from a user’s Google mailbox instead
• Connector catalog
• Troubleshooting