AgentMail

Email inbox API for AI agents — give your agent its own email address

AgentMail provides API-first email inboxes designed for AI agents. Create inboxes in milliseconds, send and receive threaded conversations, handle attachments, and extract data — all via a simple REST API. Built for two-way email communication, not one-way notifications. Used by browser agents for 2FA extraction, scheduling agents, document processing, and customer service routing.

Best for agent capabilities

User communication Workflow automation

Useful in agent tasks

Communicate with users

Send timely, personalized messages and handle conversations across channels.

Automate business workflows

Connect services and coordinate durable multi-step operational work.

Overview

Websiteagentmail.to

Authapi key

PricingFree tier available · $0/month

SDKstypescript, python

OpenAPINo

MCP SupportYes

When to use AgentMail

AgentMail is listed for Email, Communication workflows. AgentMail provides API-first email inboxes designed for AI agents. Create inboxes in milliseconds, send and receive threaded conversations, handle attachments, and extract data — all via a simple REST API. Built for two-way email communication, not one-way notifications. Used by browser agents for 2FA extraction, scheduling agents, document processing, and customer service routing. Consider it when an agent needs this capability through a documented service boundary instead of custom infrastructure maintained inside the application.

In 4agent's task model, the product maps to user communication, workflow automation. That makes it a candidate for workflows that communicate with users, automate business workflows.

Integration checklist

Access: confirm the api key authentication flow, credential scope, rotation process, and whether calls can be attributed to a user or service identity.
Client support: official or documented clients are listed for typescript, python.
Automation: OpenAPI is not currently recorded, MCP is listed as available, and CLI support is not currently recorded. Confirm each requirement in the provider's current documentation.
Operations: test rate limits, timeouts, retry safety, error payloads, logs, data retention, and the current free-tier and paid pricing model with production-like volume.

Sources and verification

Use these primary sources to verify current behavior before making an implementation or purchasing decision. Product capabilities, limits, and prices can change after a 4agent listing is reviewed.