---
title: Introduction
description: Agentry is email infrastructure for AI agents — a multi-tenant email API with full SDK support.
---

## Key Features

- **Agent Friendly** — Stable API surface with generated references and practical examples.
- **Multi-tenant by Default** — Subdomain routing, row-level security, per-tenant rate limits.
- **AI-Native** — Semantic search, agent-readable docs, webhook-driven workflows.

## Quick Links

- [Agent vs Human](/docs/agent-vs-human) — Choose the right surface for your use case
- [Quickstart](/docs/quickstart) — Get up and running in 2 minutes
- [Concepts](/docs/concepts/inboxes) — Understand the core abstractions
- [Agent Guides](/docs/guides/agent-integration) — Agent namespace workflows
- [Human Guides](/docs/guides/human-integration) — Human namespace workflows

## API Surfaces

Agentry has two inbox surfaces:

```
Agent API: https://api.agentry.to/agent/v0
Human API: https://api.agentry.to/human/v0
```

Use the **Agent API** for inboxes Agentry hosts for your agents. Use the **Human API** for agent-friendly access to human-owned inboxes hosted by an existing email provider.

## Authentication

Every request requires a Bearer token:

```bash
curl -H "Authorization: Bearer ag_your_key_here" https://api.agentry.to/agent/v0/inboxes
```