Resend

Sim's Resend integration adds 8 Resend tools and 8 real-time triggers to the AI agents you build in Sim's visual workflow builder — no code required. Send emails and manage contacts with Resend. Teams often pair Resend with Rippling and Linear in the same agent.

You can send Email, get Email, create Contact, list Contacts, and get Contact with Resend in Sim, plus 3 more Resend tools listed on this page. Each runs as a tool inside an AI agent block, so an agent can chain Resend with services like Rippling and Linear and apply LLM reasoning between steps.

Connecting Resend takes about five minutes: (1) Create a free account at sim.ai. (2) Create an agent in your workspace. (3) Drag a Resend block onto the workflow builder. (4) Paste your Resend API key to authenticate — you can find it in your Resend account settings. (5) Pick a tool such as "Send Email", wire up its inputs, and click Run — your agent is live.

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

Add a Resend trigger block to your agent and copy its generated webhook URL into Resend's webhook settings. Sim supports 8 real-time triggers for Resend: Resend Email Sent, Resend Email Delivered, Resend Email Bounced, Resend Email Complained, Resend Email Opened, Resend Email Clicked, and 2 more. Once configured, every matching Resend event starts your agent instantly — no polling, no delay.

Sim receives the full event payload Resend sends — typically the record or object that changed, plus metadata like the event type and timestamp. For example, the "Resend Email Sent" trigger fires when an email is sent. Every field in the payload is available as a variable you can pass to AI blocks, conditions, or other integrations.