Authentication

The Resend API declares one security scheme. The client sends each credential only on the operations whose security requirement accepts that scheme, so one configured client covers every operation.

Configuring the client

Credentials go on the client once, when it is created, and the SDK attaches the right one to each request.

const client = new Resend({
  // Optional: replaces the default server and any server an operation declares.
  baseUrl: "https://api.resend.com",
  auth: { bearerAuth: process.env.API_TOKEN! },
});