A little sendgrid api proxy, to enable requests from Airtable Scripting Blocks without hitting CORS errors.
The Airtable block communicates with this proxy and includes a secret proxy token. The proxy forwards requests on to Sendgrid and forwards responses to Airtable. THe code is super simple, just one little file. It doesn't do much.
The proxy only wraps a single route: the v3 API mail send route. It could be extended to other routes but that's all we needed.
It's designed to deploy on Vercel as a serverless function.
These instructions aren't super battle-tested, if anything doesn't work feel free to open an issue on this Github.
To deploy the proxy to Vercel:
Click this button, which will create a copy of this github repo and import it to Vercel to be deployed.
Then you'll need to set two environment variables in your Vercel settings:
SENDGRID_API_KEY: your API key on SendgridSENDGRID_PROXY_TOKEN: make up a long secret string. Your Airtable block will use this as a password.
If you don't want to use the button, then clone this repo,
install the Vercel CLI and
type now on the command line in this repo.