> ## Documentation Index
> Fetch the complete documentation index at: https://resend.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.
# Send emails with FastAPI
> Learn how to send your first email using FastAPI and the Resend Python SDK.
## Prerequisites
Before you start, you'll need:
* A Resend [API key](/create-an-api-key)
* A [verified domain](/add-a-domain)
## 1. Install
Get the Resend Python SDK.
```bash Pip theme={"theme":{"light":"github-light","dark":"vesper"}}
pip install resend
```
## 2. Send email using HTML
The easiest way to send an email is by using the `html` parameter.
```py main.py theme={"theme":{"light":"github-light","dark":"vesper"}}
import os
from typing import Dict
from fastapi import FastAPI
import resend
resend.api_key = os.environ["RESEND_API_KEY"]
app = FastAPI()
@app.post("/")
def send_mail() -> Dict:
params: resend.Emails.SendParams = {
"from": "Acme ",
"to": ["delivered@resend.dev"],
"subject": "hello world",
"html": "it works!",
}
email: resend.Emails.SendResponse = resend.Emails.send(params)
return email
```
## 3. Try it yourself
Full FastAPI web application
Basic email sending
Send emails with file attachments
Send emails using Resend hosted templates
Schedule emails for future delivery
Manage contacts and audiences
Create and manage sending domains
Receive and process inbound emails
Double opt-in subscription flow