Inbox API
Create and manage email inboxes entirely through an API, including inbox creation, sending, receiving, and search for agent workflows.
AgentMail
AgentMail is an email inbox API for AI agents to create, send, receive, and search messages via REST APIs and SDKs. Built for threaded workflows, verification, support, scheduling, and approvals.
Email inbox API for AI agents
AgentMail is an email inbox API for AI agents. It gives software agents real inboxes they can create, send from, receive into, and search through using REST APIs and SDKs, with support for threaded conversations and agent-oriented workflows.
The product is positioned for developers building autonomous or semi-autonomous systems that need to interact with email as a live communication channel. The site highlights use cases such as browser automation, customer service, scheduling, document processing, and inbox-based approvals.
Core capabilities
Conversation handling
Handle two-way email communication with threads, replies, attachments, realtime events, semantic search, and data extraction.
Developer tooling
Start inboxes quickly with a simple API call, typed SDKs, REST endpoints, webhooks, CLI support, and an MCP server.
Email delivery controls
Use custom domains on supported plans and manage deliverability settings such as DKIM, SPF, DMARC, suppression lists, and optimized shared IPs.
Security and enterprise options
Choose deployment and security options that include SOC 2 Type II compliance, multi-factor auth, signed webhooks, SSO, EU cloud, BYO cloud deployment, and dedicated IPs on enterprise plans.
Common use cases
Browser sign-up and verification
Let browser agents request and read OTP or verification codes from a real inbox when signing up for external services.
Customer support automation
Receive inbound support mail, triage it, and route messages to the right handler or workflow.
Scheduling and executive assistance
Build assistants that read schedules, send confirmations, and manage back-and-forth email around meetings or reservations.
Document processing and inbox extraction
Convert emails and attachments into searchable notes or structured content for later retrieval and follow-up.
Inbox-based approvals
Queue approvals in email so agents can draft replies or wait for a human sign-off before taking action.
Pros and Cons
Pros
- Supports full inbox operations through API rather than only outbound email sending.
- Includes practical agent features such as threads, replies, attachments, realtime events, and semantic search.
- Offers a free tier plus paid plans, which lowers the barrier to evaluating the product.
- Provides enterprise security posture with SOC 2 Type II compliance and a published trust center.
Cons
- Advanced enterprise features such as BYO cloud deployment, EU region cloud, dedicated IPs, and OIDC/SAML SSO are limited to custom enterprise arrangements.
- The source does not show full documentation for every integration or workflow, so some capabilities may need confirmation in the docs before adoption.
FAQ
What is AgentMail?
AgentMail is an API-first email platform built for AI agents. It lets developers create inboxes and work with email programmatically instead of treating email as a one-way notification channel.
Does AgentMail offer a free plan?
The source shows a free tier, a Developer plan, a Startup plan, and an Enterprise option with custom pricing. The product also offers a Start for free flow on the home page.
Can I use my own custom domain?
Yes. The pricing page includes custom domains on paid plans and the home page says users can create inboxes via API without domain verification or waiting.
What workflows does AgentMail support?
The site says AgentMail supports threads and replies, attachments, realtime events, semantic search, data extraction, webhooks, SDKs, and an MCP server.
Is AgentMail suitable for enterprise security reviews?
Yes. The security page states AgentMail is SOC 2 Type II compliant and that the full report is available to current and prospective customers under NDA.
Quick Facts
- Category
- Email Inbox API for AI Agents
- Primary users
- Developers building AI agents and agentic workflows
- Access model
- REST API, SDKs, CLI, and MCP server
- Pricing
- Free tier available; paid plans and custom enterprise pricing
- Security
- SOC 2 Type II compliant
- Source domain
- agentmail.to
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