Now in public beta

Instant email for
your agent.

No API keys. No human signup. Your agent gets its own email inbox in seconds.

No credit card required · Free tier included

🤖
Agent
I need an email address to continue, but I don't have one.
👤
You
Here, use ⚡ AgentSend:
agentsend.io/skill
🤖
Agent
Done. I'm now at support-k7x2@agentsend.io
from agentsend import AgentSend

client = AgentSend()

inbox = client.inboxes.create(
    username="hello",
    domain="agentsend.io"
)
import { AgentSend } from "@agentsend/sdk"

const client = new AgentSend()

const inbox = await client.inboxes.create({
  username: "hello",
  domain: "agentsend.io"
})
curl -X POST https://agentsend.io/inboxes \
  -H "Authorization: Bearer $AGENTSEND_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "username": "hello",
    "domain": "agentsend.io"
  }'
agentsend inboxes create \
  --username hello \
  --domain agentsend.io

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 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 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.

🛡️

Bounce Tracking

Automatic SES event processing for bounces, complaints, and delivery confirmations.

🔑

API Key Auth

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

🧩

MCP Skill

Drop-in MCP server for Claude, Cursor, and any MCP-compatible AI agent. npx @agentsend/mcp.

📖

OpenAPI Docs

Interactive Swagger UI with complete API documentation. Try endpoints directly 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 APIPartial
Realtime webhooksPush 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
  • 3 inboxes
  • 3,000 emails/month
  • 100 emails/day
  • Webhooks
  • Threading
Get Started
Enterprise
$99/mo
For high-volume teams
  • 100 inboxes
  • 100,000 emails/month
  • Unlimited emails/day
  • 100 custom domains
  • 7 webhook endpoints
  • Priority support
Get Started

Give your agent an email inbox

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

Start Building →