Now in public beta

Email inboxes for
AI agents

Give your agent its own email inbox. Send, receive, and manage full conversations — like Gmail, but built for agents.

No credit card required · Free tier with 1,000 emails/month

import { AgentSend } from "@agentsend/sdk";

const client = new AgentSend({ apiKey: process.env.AGENTSEND_KEY });

// Create an inbox for your agent
const inbox = await client.inboxes.create({
  displayName: "Support Agent"
});

// Send an email
await client.messages.send(inbox.id, {
  to: ["user@example.com"],
  subject: "Your order has shipped",
  bodyText: "Hi! Your order #1234 is on the way."
});

// When they reply, get the conversation
const threads = await client.threads.list(inbox.id);
import requests

API_KEY = "ask_..."
BASE = "https://agentsend.io"
headers = { "x-api-key": API_KEY }

# Create an inbox
inbox = requests.post(
  f"{BASE}/inboxes",
  json={"displayName": "Support Agent"},
  headers=headers
).json()

# Send an email
requests.post(
  f"{BASE}/inboxes/{inbox['id']}/messages",
  json={
    "to": ["user@example.com"],
    "subject": "Your order has shipped",
    "bodyText": "Hi! Order #1234 is on the way."
  },
  headers=headers
)
# Create an inbox
curl -X POST https://agentsend.io/inboxes \
  -H "x-api-key: ask_..." \
  -H "Content-Type: application/json" \
  -d '{"displayName": "Support Agent"}'

# Send an email
curl -X POST https://agentsend.io/inboxes/{id}/messages \
  -H "x-api-key: ask_..." \
  -H "Content-Type: application/json" \
  -d '{
    "to": ["user@example.com"],
    "subject": "Your order has shipped",
    "bodyText": "Hi! Order #1234 is on the way."
  }'

Up and running in 60 seconds

Three steps. No config. No SMTP setup.

1

Get an API key

Sign up and grab your key. No credit card, no email verification, no waiting.

2

Create an inbox

One API call creates a fully functional email inbox for your agent with a unique address.

3

Send & receive

Your agent sends emails, gets replies via webhooks, and tracks full conversation threads.

Everything your agent needs

It's not AI for your email. It's email for your AI.

✉️

Send & Receive

Full two-way email. AWS SES for outbound delivery, built-in SMTP server for inbound. Queue-based async processing.

💬

Auto-Threading

RFC 5322 compliant conversation threading. Messages are auto-grouped via Message-ID, In-Reply-To, and References.

Realtime Webhooks

Instant notifications when emails arrive. HMAC-SHA256 signed payloads with automatic retry and exponential backoff.

🌐

Custom Domains

Use your own domain with automated DKIM and SPF verification. Your agent sends from your-brand.com.

📎

Attachments

Upload and attach files up to 10MB. S3-backed storage with presigned download URLs for inbound attachments.

🛡️

Bounce & Complaint Tracking

Automatic SES event processing for bounces, complaints, and delivery confirmations. Protects your sender reputation.

🔐

API Key Auth

Simple bearer token and API key auth. SHA-256 hashed storage with per-account and per-inbox rate limiting.

📦

TypeScript SDK

First-class TypeScript SDK with full type safety. npm install @agentsend/sdk and start sending in minutes.

📖

OpenAPI Docs

Interactive Swagger UI with complete API documentation. Try endpoints directly from your browser at /docs.

Why not just use Gmail?

Email services built for humans don't work for agents.

AgentSend Gmail API
Programmatic inbox creation
No human signup required
Conversation threading API Partial
Realtime webhooks Push only
Custom domains
No OAuth dance
Built for AI agents

Works with your agent framework

LangChain CrewAI AutoGen OpenAI Agents Claude MCP Any HTTP client

Simple, transparent pricing

Start free. Scale when you need to.

Free
$0/mo
Perfect for prototyping
  • 5 inboxes
  • 1,000 emails/month
  • 10 emails/day per inbox
  • Webhooks
  • Threading
  • Community support
Get Started
Enterprise
Custom
For high-volume teams
  • Unlimited inboxes
  • Unlimited emails
  • Dedicated IP
  • SLA guarantee
  • Custom integrations
  • Dedicated support
Contact Sales

Give your agent an email inbox

Free to start. No credit card required. Takes 60 seconds.

Start Building →