Piisend
Developers + AI Agents

Email from one API

Send transactional mail, track delivery, and wire agents to the same endpoint.

Get API keyAgent docs →

Try it live

  • REST API
  • Templates
  • Webhooks
  • Agent tools
  • DNS verify
  • Delivery logs

Key facts about Piisend

  • 3,000

    Free emails / month

  • 1

    REST call to send

  • <10

    Minutes to first email

  • SPF · DKIM · DMARC

    Auth standards

Free email tools

Public utilities on piisend.com — validation, DNS checks, and browser-based compose tools. No signup required.

Browse all free tools →

3 steps

  1. Get API key

  2. Verify domain

  3. Send mail

  • API keyactive
  • Domainverified
  • Last senddelivered · 240ms

Built for agents

LangChainCrewAIFunction calling
Agent docs →
send_email({
  to, subject, template
}) → POST /emails

Use cases

All →

Piisend vs the rest

Piisend
The rest
  • One API for apps + agents
    Separate SMTP stacks
  • Webhooks on delivery
    Manual log polling
  • Templates by slug
    HTML in prompts

FAQ

Can AI agents send email?

Yes — any runtime that calls HTTP. Register the send endpoint as a tool.

Is there a free tier?

Yes. 3,000 emails/month on Free. See pricing for Pro.

More questions →

Ready to ship?

3,000 emails/mo free · pricing

Get API key