AgentMail SDK

AgentMail is an API-first email platform for AI agents. Install the SDK and initialize the client.

Installation

# TypeScript/Node
npm install agentmail

# Python
pip install agentmail

Setup

import { AgentMailClient } from "agentmail";
const client = new AgentMailClient({ apiKey: "YOUR_API_KEY" });

from agentmail import AgentMail
client = AgentMail(api_key="YOUR_API_KEY")

Inboxes

Create scalable inboxes on-demand. Each inbox has a unique email address.

// Create inbox (auto-generated address)
const autoInbox = await client.inboxes.create();

// Create with custom username and domain
const customInbox = await client.inboxes.create({
  username: "support",
  domain: "yourdomain.com",
});

// List, get, delete
const inboxes = await client.inboxes.list();
const fetchedInbox = await client.inboxes.get({
  inboxId: "[email protected]",
});
await client.inboxes.delete({ inboxId: "[email protected]" });

# Create inbox (auto-generated address)
inbox = client.inboxes.create()

# Create with custom username and domain
inbox = client.inboxes.create(username="support", domain="yourdomain.com")

# List, get, delete
inboxes = client.inboxes.list()
inbox = client.inboxes.get(inbox_id="[email protected]")
client.inboxes.delete(inbox_id="[email protected]")

Messages

Always send both text and html for best deliverability.

// Send message
await client.inboxes.messages.send({
  inboxId: "[email protected]",
  to: "[email protected]",
  subject: "Hello",
  text: "Plain text version",
  html: "<p>HTML version</p>",
  labels: ["outreach"],
});

// Reply to message
await client.inboxes.messages.reply({
  inboxId: "[email protected]",
  messageId: "msg_123",
  text: "Thanks for your email!",
});

// List and get messages
const messages = await client.inboxes.messages.list({
  inboxId: "[email protected]",
});
const message = await client.inboxes.messages.get({
  inboxId: "[email protected]",
  messageId: "msg_123",
});

// Update labels
await client.inboxes.messages.update({
  inboxId: "[email protected]",
  messageId: "msg_123",
  addLabels: ["replied"],
  removeLabels: ["unreplied"],
});

# Send message
client.inboxes.messages.send(
    inbox_id="[email protected]",
    to="[email protected]",
    subject="Hello",
    text="Plain text version",
    html="<p>HTML version</p>",
    labels=["outreach"]
)

# Reply to message
client.inboxes.messages.reply(
    inbox_id="[email protected]",
    message_id="msg_123",
    text="Thanks for your email!"
)

# List and get messages
messages = client.inboxes.messages.list(inbox_id="[email protected]")
message = client.inboxes.messages.get(inbox_id="[email protected]", message_id="msg_123")

# Update labels
client.inboxes.messages.update(
    inbox_id="[email protected]",
    message_id="msg_123",
    add_labels=["replied"],
    remove_labels=["unreplied"]
)

Threads

Threads group related messages in a conversation.

// List threads (with optional label filter)
const threads = await client.inboxes.threads.list({
  inboxId: "[email protected]",
  labels: ["unreplied"],
});

// Get thread details
const thread = await client.inboxes.threads.get({
  inboxId: "[email protected]",
  threadId: "thd_123",
});

// Org-wide thread listing
const allThreads = await client.threads.list();

# List threads (with optional label filter)
threads = client.inboxes.threads.list(inbox_id="[email protected]", labels=["unreplied"])

# Get thread details
thread = client.inboxes.threads.get(inbox_id="[email protected]", thread_id="thd_123")

# Org-wide thread listing
all_threads = client.threads.list()

Attachments

Send attachments with Base64 encoding. Retrieve from messages or threads.

// Send with attachment
const content = Buffer.from(fileBytes).toString("base64"