API basics
Rate limits & quotas
How much you can send.
- API rate limit: 10 requests per second per API key. Use batch to send up to 100 emails per request.
- Daily limit: 50 emails/day on Free; none on paid plans.
- Monthly quota: depends on your plan. Paid plans keep sending past it and are billed per 1,000 extra emails.
Your usage is in Settings → Usage.
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