---
title: Email Layer for AI Agents | Secure AI Inbox & Email API
description: Get a free Sendmux AI agent inbox. Secure, reliable email to send/receive and route via one API with threads, attachments, history, failover, and webhooks.
image: https://myagent.mx/og-image.jpg
---

# Email Layer for AI Agents | Secure AI Inbox & Email API

Give your AI agent its own free Sendmux inbox. Secure, dependable email that keeps working when agents are on the job.

Send and receive email, route it through one API, and keep threads, attachments, message history, failover, and webhooks built in.

## For agents

Read https://sendmux.ai/auth.md and follow the instructions to get your own Sendmux agent inbox and invite the owner before stopping. If your agent supports skills, install the Sendmux skills with `npx skills add Sendmux/skills`. For complete docs, SDK, CLI, and MCP options, read https://sendmux.ai/llms.txt.

## For humans

Copy this instruction and send it to your AI agent:

Read https://sendmux.ai/auth.md and follow the instructions to get your own Sendmux agent inbox and invite the owner before stopping. If your agent supports skills, install the Sendmux skills with `npx skills add Sendmux/skills`. For complete docs, SDK, CLI, and MCP options, read https://sendmux.ai/llms.txt.

Your agent will sign up and email you. Log in to approve your agent for sending, and set up billing.

## Developer resources

- MCP: https://sendmux.ai/docs/guides/mcp
- SDKs: https://sendmux.ai/docs/sdks
- CLI: https://sendmux.ai/docs/cli
- Agent skills: https://sendmux.ai/docs/guides/agent-skills
- LLM docs index: https://sendmux.ai/llms.txt
- Agent auth guide: https://sendmux.ai/auth.md
- MyAgent LLM index: https://myagent.mx/llms.txt
- MyAgent complete LLM context: https://myagent.mx/llms-full.txt
- MyAgent blog RSS: https://myagent.mx/blog/feed.xml

## Discovery resources

- API catalog: https://myagent.mx/.well-known/api-catalog
- OAuth authorization server metadata: https://myagent.mx/.well-known/oauth-authorization-server
- OAuth protected resource metadata: https://myagent.mx/.well-known/oauth-protected-resource
- MCP server card: https://myagent.mx/.well-known/mcp/server-card.json
- Agent skills index: https://myagent.mx/.well-known/agent-skills/index.json

```json
{
  "@context": "https://schema.org",
  "@graph": [
    {
      "@type": "Organization",
      "@id": "https://sendmux.ai/#organization",
      "name": "Sendmux",
      "url": "https://sendmux.ai/",
      "logo": "https://myagent.mx/images/emblem.svg",
      "description": "Email layer for AI agents - send, receive, and route email from a single API."
    },
    {
      "@type": "WebSite",
      "@id": "https://myagent.mx/#website",
      "url": "https://myagent.mx/",
      "name": "myagent.mx",
      "publisher": { "@id": "https://sendmux.ai/#organization" },
      "inLanguage": "en-AU"
    },
    {
      "@type": "WebPage",
      "@id": "https://myagent.mx/#webpage",
      "url": "https://myagent.mx/",
      "name": "Email Layer for AI Agents | Secure AI Inbox & Email API",
      "isPartOf": { "@id": "https://myagent.mx/#website" },
      "about": { "@id": "https://sendmux.ai/#software" },
      "description": "Get a free Sendmux AI agent inbox. Secure, reliable email to send/receive and route via one API with threads, attachments, history, failover, and webhooks.",
      "inLanguage": "en-AU"
    },
    {
      "@type": "SoftwareApplication",
      "@id": "https://sendmux.ai/#software",
      "name": "Sendmux",
      "applicationCategory": "DeveloperApplication",
      "operatingSystem": "HTTP API, SMTP, IMAP",
      "url": "https://sendmux.ai/",
      "description": "Email layer for AI agents. Get a free email address and send, receive, and route email from a single API.",
      "featureList": [
        "Send email",
        "Receive email",
        "Multi-provider routing and failover",
        "Threads and message history",
        "Attachments",
        "Webhooks",
        "HTTP API, SMTP, and IMAP",
        "MCP, SDKs, CLI, and agent skills"
      ],
      "offers": {
        "@type": "Offer",
        "price": "0",
        "priceCurrency": "USD",
        "description": "Free to start"
      },
      "provider": { "@id": "https://sendmux.ai/#organization" }
    }
  ]
}
```