SendGrid send mail error: {"errors":[{"message":"Bad Request","field":null,"help":null}]}"

[ettengererin]

I am trying to make a request to the Sendgrid mail/send api to send an email via javascript.

I am getting the response: {"errors":[{"message":"Bad Request","field":null,"help":null}]}"

For more context, I am using Airtable scripting to write this script.

const SENDGRID_API_KEY = "XXXXXX" // my api key, removed for the public github question
const data = {"personalizations":[{"to":[{"email":"[email protected]","name":"John Doe"}],
"subject":"Hello, World!"}],"content": [{"type": "text/plain", "value": "Heya!"}],
"from":{"email":"[email protected]","name":"Erin Ettenger"},
"reply_to":{"email":"[email protected]","name":"Sam Smith"}};


const sendgridReq = new Request(
    "https://api.sendgrid.com/v3/mail/send",
    {
        method: "POST",
        headers: {"Content-Type": "application/json",
        "Authorization": "Bearer " + SENDGRID_API_KEY},
        body: data
        }
);

const sendgrid_res = await fetch(sendgridReq);
const sengrid_out = await sendgrid_res.json();
console.log(`Sendgrid out: ${JSON.stringify(sengrid_out)}`);

Would love some help debugging this issue! There is no helpful information in the Bad Request error.