Resend

Resend is an email API for sending transactional and marketing email. Connect it to camelAI — the agent that builds and deploys your apps — and the agent, your scheduled workflows, and your deployed apps can all send email through your own Resend account. You describe what you want; the agent writes the code and uses your connection to send it.

What you can build

Describe any of these in a chat and the agent builds it against your Resend connection:

When a new row lands in our Stripe connection, send the customer an order confirmation email with Resend.

Every night, check for records pending review longer than 30 days and email a summary to dev-alerts@company.com via Resend.

After someone signs up in our React app, send them a welcome email through Resend.

Query our active subscriber table and send this newsletter to everyone with Resend.

The prompt is the work. The agent writes the sending code, wires it to the right trigger, and uses your connection for credentials.

Connect Resend

Use it

The simplest path is to not write any code. Ask the agent:

Email me a summary of yesterday's signups every morning at 8am via Resend.

The agent builds the app or scheduled workflow and sends through your connection.

If you're writing the code yourself, resolve the connection by type and call its fetch method. Don't hard-code an alias — camelAI derives it from the connection's type and name.

import { createConnections } from "~/lib/connections";

export async function action({ context }) {
  const connections = createConnections(context.cloudflare.env);
  const resend = await context.cloudflare.env.CONNECTIONS.find({ type: "resend" });

  const res = await connections[resend.alias].fetch("/emails", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({
      from: "Onboarding <onboarding@yourdomain.com>",
      to: ["recipient@example.com"],
      subject: "Welcome aboard!",
      html: "<p>Thanks for signing up!</p>",
    }),
  });

  if (!res.ok) {
    throw new Error(`Resend failed: ${res.status} ${await res.text()}`);
  }

  return await res.json();
}

How it works

• Native Communication connection — Resend is built in, with a fixed base URL and a single API key field. No base URL or auth type to set up.
• Encrypted storage — your key is encrypted at rest. Connection listings show only that credentials exist, never the key itself.
• Authenticated proxy — calls go through an authenticated fetch to https://api.resend.com. Relative paths resolve against that base; absolute URLs are restricted to that origin. camelAI adds the Authorization: Bearer header server-side.
• Server-side execution — the connection is available to the agent, workflows, and your apps' server code, never to client code.

Staging and production

You can add more than one Resend connection to a workspace — for example one named Production and one named Staging — and resolve the one you want by name:

const resend = await env.CONNECTIONS.find({ type: "resend", name: "Production" });

Because your code resolves the connection by type and name rather than by an embedded key, rotating a key in Resend doesn't require any code changes.

FAQ

Stop using or remove Resend

There's no per-app "unlink" — connections are scoped to a workspace, not granted app by app. To stop one app from sending email, change or remove the code that calls the connection.

To cut off everything, either rotate the API key in Resend (then update the connection) or delete the connection: