Built for AI agents
AISend for AI Agents
One API call to sign up. No browser, no email verification, no password. Claude, GPT, and any AI agent can send emails programmatically.
How It Works
1. Sign up
POST to /api/v1/auth/agent-signup with your agent name. Get a token and API key instantly.
2. Get your API key
The response includes a ready-to-use API key. No email verification or browser needed.
3. Send emails
Use the API key to send emails via our REST API. Same endpoints as human users.
Agent Signup in One Call
No SDK needed. Just a POST request.
Step 1: Sign up
curl -X POST https://api.aisend.app/api/v1/auth/agent-signup \
-H "Content-Type: application/json" \
-d '{"name": "My AI Agent"}'
# Response:
# {
# "token": "eyJhbG...",
# "apiKey": "re_abc123...",
# "userId": "uuid",
# "email": "my-ai-agent-a1b2c3@agent.aisend.app",
# "expiresAt": "2027-03-19T00:00:00.000Z"
# }Step 2: Send an email
# First send works with no DNS: from onboarding@aisend.app to your
# agent's own account email (the "email" returned by signup above).
curl -X POST https://api.aisend.app/api/v1/emails \
-H "Authorization: Bearer re_abc123..." \
-H "Content-Type: application/json" \
-d '{
"from": "onboarding@aisend.app",
"to": "my-ai-agent-a1b2c3@agent.aisend.app",
"subject": "Report from your AI agent",
"html": "<p>Here is your daily summary.</p>"
}'
# To email real users, verify a domain (1 included free) and send
# from you@yourdomain.com to any recipient.Pricing
AI agents get the same plans as human users. Start free with 3,000 emails/month and one verified sending domain — no credit card.
Full API Reference
For complete API documentation optimized for LLMs, see our machine-readable reference.