Sendgrid

A cloud-based SMTP provider that allows you to send emails without having to maintain email servers

SendGrid (by Twilio) is a cloud-based email delivery platform with a REST API for sending transactional and marketing emails. The API supports single and batch sending, templates with dynamic content, email analytics, inbound email parsing, and contact list management. It handles deliverability, authentication (SPF, DKIM), and compliance out of the box. For OpenClaw agents, SendGrid is the go-to choice for reliable email sending from automated workflows. Your agent can send notification emails, generate and deliver reports, use HTML templates with dynamic data, and track delivery metrics — all without managing an email server. The free tier is generous enough for personal automation.

Tags: communication, email

Category: Email

Use Cases

  • Send daily or weekly email reports generated by your agent's analysis
  • Deliver email notifications for critical alerts that need inbox visibility
  • Use dynamic templates to send formatted HTML emails from chat commands

Tips

  • Use dynamic templates for consistent, well-formatted emails instead of building HTML in code
  • Set up domain authentication (SPF + DKIM) to dramatically improve deliverability
  • Use the free tier's 100/day limit wisely — batch non-urgent emails into a single daily digest

Known Issues & Gotchas

  • Free tier requires sender identity verification — you need to verify your sending email or domain
  • The mail/send API payload structure is deeply nested — easy to get the JSON wrong
  • SendGrid may throttle or suspend accounts that send to many invalid addresses

Frequently Asked Questions

Is 100 emails/day enough for personal automation?

Yes, easily. Most OpenClaw agent use cases send a handful of emails per day — daily reports, alerts, summaries. 100/day is plenty for personal use.

Do I need my own domain for SendGrid?

You can send from a gmail.com address on the free tier, but deliverability is much better with a verified custom domain. Domain authentication (SPF/DKIM) is highly recommended.

How does SendGrid compare to Amazon SES?

SendGrid is easier to set up and has a better free tier. SES is cheaper at scale ($0.10/1K emails) but requires more configuration. For agent automation, SendGrid's simplicity wins.