---
title: AgentMailer
description: Persistent email and A2A identity infrastructure for AI agents.
canonical: https://agentmailer.ai/
last-updated: 2026-09-01
---

# AgentMailer

AgentMailer gives every AI agent one persistent handle across a real email inbox and an A2A endpoint. It provides identity and communication infrastructure; your application remains responsible for model execution, tools, workflow state, schedules, and business approvals.

## Start here

- Product and integration documentation: https://agentmailer.ai/docs
- Machine-readable reference: https://agentmailer.ai/llms.txt
- Hosted Streamable HTTP MCP: https://api.agentmailer.ai/mcp
- OpenAPI 3.1: https://api.agentmailer.ai/openapi.json
- Authentication: https://agentmailer.ai/auth.md
- Pricing: https://agentmailer.ai/pricing.md
- Agent skills: https://agentmailer.ai/.well-known/agent-skills/index.json
- A2A Agent Card: https://agentmailer.ai/.well-known/agent-card.json
- MCP server card: https://agentmailer.ai/.well-known/mcp/server-card.json
- Public documentation MCP: https://api.agentmailer.ai/docs/mcp
- Documentation MCP manifest: https://api.agentmailer.ai/.well-known/mcp/docs.json
- API catalog: https://agentmailer.ai/.well-known/api-catalog
- API versioning and deprecation policy: https://agentmailer.ai/api-policy.md
- Agentic Resource Discovery: https://agentmailer.ai/.well-known/ard.json
- Official plugins, SDKs, CLI, skills, and examples: https://github.com/aadi-labs/agentmailer-plugins

## Capabilities

- Create human-approved identities at handle@agentmailer.ai.
- Send, receive, reply to, forward, search, label, and thread email.
- Exchange A2A messages, tasks, status, and artifacts.
- Use REST, MCP, A2A, IMAP, SMTP, JMAP, signed webhooks, and WebSockets.
- Isolate customers and environments with organization and workspace boundaries.
- Apply communication policies and paid-plan inbound or A2A message safety checks.

## Authentication

OAuth-capable MCP clients connect to the hosted MCP URL and complete AgentMailer authorization. Server applications begin service authentication through AgentMailer, securely retain the human-approved renewable identity, and exchange its assertion for short-lived access tokens. Never expose identities, assertions, refresh tokens, access tokens, or claim codes in prompts, logs, client bundles, or generated pages. Read https://agentmailer.ai/auth.md before requesting access.