SendGrid

API

Twilio's email API and SMTP relay for transactional and marketing email

Price: Free trial, then paid
Access: API key

About

Twilio's email service: a v3 REST API and SMTP relay for app email, plus Marketing Campaigns and Inbound Parse. EU data residency is available through EU subusers. There is no ongoing free plan, only a 60-day trial.

What you can do with it

Send transactional email through the v3 Mail Send API or SMTP
Run marketing campaigns to segmented contact lists
Parse incoming email and post it to your app with Inbound Parse

Get started

Create an API key
Authenticate your sending domain

Example

curl --request POST \
  --url https://api.sendgrid.com/v3/mail/send \
  --header "Authorization: Bearer $SENDGRID_API_KEY" \
  --header 'Content-Type: application/json' \
  --data '{"personalizations":[{"to":[{"email":"john.doe@example.com","name":"John Doe"}],"subject":"Hello, World!"}],"content":[{"type":"text/plain","value":"Heya!"}],"from":{"email":"sam.smith@example.com","name":"Sam Smith"}}'

Details

Hosting: Hosted service
Available in: Worldwide
Official SDKs: C#, Go, Java, JavaScript/TypeScript, PHP, Python, Ruby
MCP server: None