What can I automate with Resend in Sim?

With Sim you can: Send Email; Get Email; Create Contact; List Contacts; Get Contact; and 3 more tools. Each action runs inside an AI agent block, so you can combine Resend with LLM reasoning, conditional logic, and data from any other connected service.

How do I connect Resend to Sim?

Getting started takes under five minutes: (1) Create a free account at sim.ai. (2) Open your workspace and create an agent. (3) Drag a Resend block onto the workflow builder. (4) Authenticate your account to connect. (5) Choose the tool you want to use, wire it to the inputs you need, and click Run. Your agent is live.

Can I use Resend as a tool inside an AI agent in Sim?

Yes — this is one of Sim's core capabilities. Instead of hard-coding when and how Resend is used, you give an AI agent access to Resend tools and describe the goal in plain language. The agent decides which tools to call, in what order, and how to handle the results. This means your automation adapts to context rather than breaking when inputs change.

How do I send email with Resend in Sim?

Add a Resend block to your agent and select "Send Email" as the tool. Fill in the required fields — you can reference outputs from earlier steps, such as text generated by an AI agent or data fetched from another integration. No code is required.

How do I trigger a Sim agent from Resend automatically?

Add a Resend trigger block to your agent and copy the generated webhook URL. Paste that URL into Resend's webhook settings and select the events you want to listen for (Resend Email Sent, Resend Email Delivered, Resend Email Bounced, Resend Email Complained, Resend Email Opened, Resend Email Clicked, Resend Email Failed, Resend Webhook (All Events)). From that point on, every matching event in Resend instantly runs your agent — no polling, no delay.

What data does Sim receive when a Resend event triggers an agent?

When Resend fires a webhook, Sim receives the full event payload that Resend sends — typically the record or object that changed, along with metadata like the event type and timestamp. Inside your agent, every field from that payload is available as a variable you can pass to AI blocks, conditions, or other integrations.

What Resend tools does Sim support?

Sim supports 8 Resend tools: Send Email, Get Email, Create Contact, List Contacts, Get Contact, Update Contact, Delete Contact, List Domains.

Is the Resend integration free to use?

Yes — Sim's free plan includes access to the Resend integration and every other integration in the library. No credit card is needed to get started. Visit sim.ai to create your account.

Back to Integrations

Resend

Send emails and manage contacts with Resend.

View docs

Overview

Integrate Resend into your workflow. Send emails, retrieve email status, manage contacts, and view domains. Requires API Key.

How to automate Resend with Sim

Create a free account
Sign up at sim.ai in seconds. No credit card required. Your workspace is ready immediately.
Add a Resend block
Open your workspace, drag a Resend block onto the workflow builder, and authenticate your account.
Configure, connect, and run
Pick the tool you need, wire in an AI agent for reasoning or data transformation, and run. Your Resend automation is live.

Real-time triggers

Connect a Resend webhook to Sim and your agent runs the instant an event happens — no polling, no delay.

Resend Email Sent

Trigger workflow when an email is sent

Resend Email Delivered

Trigger workflow when an email is delivered

Resend Email Bounced

Trigger workflow when an email bounces

Resend Email Complained

Trigger workflow when an email is marked as spam

Resend Email Opened

Trigger workflow when an email is opened

Resend Email Clicked

Trigger workflow when a link in an email is clicked

Resend Email Failed

Trigger workflow when an email fails to send

Resend Webhook (All Events)

Trigger on Resend webhook events we subscribe to (email lifecycle, contacts, domains—see Resend docs). Flattened email fields may be null for non-email events; use <code>data</code> for the full payload.

Supported tools

8 Resend tools available in Sim

Send Email

Send an email using your own Resend API key and from address

Get Email

Retrieve details of a previously sent email by its ID

Create Contact

Create a new contact in Resend

List Contacts

List all contacts in Resend

Get Contact

Retrieve details of a contact by ID or email

Update Contact

Update an existing contact in Resend

Delete Contact

Delete a contact from Resend by ID or email

List Domains

List all verified domains in your Resend account

Frequently asked questions

Sim's Resend integration lets you build AI agents that automate tasks in Resend without writing code. Send emails and manage contacts with Resend. You can connect Resend to hundreds of other services in the same agent — from CRMs and spreadsheets to messaging tools and databases.

Start automating Resend today

Build your first AI agent with Resend in minutes. Connect to every tool your team uses. Free to start — no credit card required.