Requestly
SendGrid logo

SendGrid API

Send transactional and marketing emails at scale with SendGrid's reliable email delivery API. Track opens, clicks, and deliverability.

Verified
2026-02-03

At a glance

Essential information

Authentication
api_key
Free tier
Available
Starting fromFree (100 emails/day)

About

SendGrid is a leading cloud-based email delivery platform trusted by over 80,000 customers. Send transactional and marketing emails at scale with reliable infrastructure, detailed analytics, and deliverability tools.

What you can build

  • Transactional email systems (receipts, confirmations)
  • Marketing campaign platforms
  • Automated email workflows
  • Email analytics dashboards
  • Password reset and notifications
  • Newsletter distribution systems
  • Email verification services
  • Customer communication tools
Free tierYes
Starting fromFree (100 emails/day)
NotesFree tier 100 emails/day. Essentials from $19.95/month (50K emails), Pro from $89.95/month (100K emails).

Last updated: 2026-02-03. Please refer to the official pricing page as pricing may have changed.

Alternatives

Similar APIs you might consider

Amazon SESSee docs ↗
PostmarkSee docs ↗

Authentication & Limits

View Docs
Auth type
api_key
Rate limits
Based on plan; no strict rate limits but fair use expected. Email limits per tier.

Steps to get API key

  1. 1Create SendGrid account at sendgrid.com
  2. 2Verify your email address
  3. 3Go to Settings > API Keys in dashboard
  4. 4Click Create API Key
  5. 5Choose Full Access or Restricted Access
  6. 6Name and generate the key
  7. 7Copy and secure the API key immediately
  8. 8Use in Authorization Bearer header

FAQ

Yes, free tier includes 100 emails/day forever. Paid plans start at $19.95/month for 50,000 emails.
Requestly

Testing APIs?

Use Requestly's lightweight & local API Client