SDKs and AI tools | Resent

Node.js SDK

$ npm install resent.one

1 import { Resent } from "resent.one";
2 
3 const resent = new Resent(process.env.RESENT_API_KEY!);
4 
5 const result = await resent.emails.send({
6   from: "Acme <noreply@yourdomain.com>",
7   to: ["you@example.com"],
8   subject: "hello world",
9   html: "<p>it works!</p>",
10 });
11 
12 console.log(result.submission_id);

Node.js SDK
Framework guides — Next.js, Express, NestJS, Bun, Workers, and more
Quickstart

Rust SDK

$ cargo add resent

1 use resent::{Resent, SendEmail};
2 
3 let resent = Resent::new(std::env::var("RESENT_API_KEY").unwrap());
4 let result = resent
5     .emails()
6     .send(SendEmail::new("Acme <noreply@yourdomain.com>", ["you@example.com"], "hello").html("<p>hi</p>"))
7     .await?;

Ruby SDK

$ gem install resent

1 require "resent"
2 
3 resent = Resent.new(ENV.fetch("RESENT_API_KEY"))
4 result = resent.emails.send(
5   from: "Acme <noreply@yourdomain.com>",
6   to: "you@example.com",
7   subject: "hello",
8   html: "<p>hi</p>"
9 )

Go SDK

$ go get github.com/resentmail/resent-go@v0.1.1

1 client, err := resent.New(os.Getenv("RESENT_API_KEY"))
2 result, err := client.Emails().Send(ctx, &resent.SendEmail{
3 	From:    "Acme <noreply@yourdomain.com>",
4 	To:      []string{"you@example.com"},
5 	Subject: "hello",
6 	HTML:    "<p>hi</p>",
7 })

Python SDK

$ pip install resent

1 from resent import Resent
2 
3 resent = Resent(os.environ["RESENT_API_KEY"])
4 result = resent.emails.send(
5     from_="Acme <noreply@yourdomain.com>",
6     to="you@example.com",
7     subject="hello",
8     html="<p>hi</p>",
9 )

PHP SDK

$ composer require resent/resent
$ # Laravel
$ composer require resent/laravel
$ # Symfony Mailer
$ composer require resent/symfony-mailer

PHP SDK
resent/resent · resent/laravel · resent/symfony-mailer

HTTP / cURL

Any language can call https://resent.one/api/v1 with:

Authorization: Bearer $RESENT_API_KEY

MCP Server

Connect AI assistants (Cursor, Claude Code, and others) to Resent docs via MCP:

https://resent.docs.buildwithfern.com/_mcp/server

Full setup: MCP Server.