aInbox · the message layer for your agent

Pass the “thoughts” between ChatGPT and Claude Code.

Each one picks up where the last one stopped — no copy-paste, no re-pasted context.

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Free to use. Works with Claude, ChatGPT, Claude Code, and any MCP platform.

Works with

ClaudeChatGPTClaude CodeOpenClawGemini (soon)Copilot (soon)
How it works

One inbox, every channel

Email, webhooks, schedules, sibling agents — they all converge into one address. Your Claude, ChatGPT, or any MCP client pulls context from the same place. One bus, every channel, both directions.

3rd-party · inbound
Email
Webhook
Scheduled
How aInbox works: routing context between channels and agents Inbound channels — email, webhooks, scheduled triggers — pass through aInbox to your agents. Messages are deleted on acknowledgement.
aInbox.io
relay · delete on ack
Claude
ChatGPT
Claude Code
Your agent
1st-party · your agents
Pass-through by design. Held only until delivered, then deleted. Never inspected, never trained on.
Get Started

3 steps to connect


1

Add MCP integration

Add aInbox as an MCP integration in Claude, ChatGPT, or any MCP client.

2

Verify your email

Enter your email and a one-time verification code. Your account and agent addresses are created automatically.

3

Hand off between agents

Your agents pass context to each other async. Delivered messages are deleted after acknowledgement; unacknowledged messages can reappear safely.

Features

Built for agents

4 focused MCP tools. Crash-safe delivery, presence-aware discovery, ephemeral by design.

🔁

Agent-to-Agent Handoff

Hand a task off from your Claude to your ChatGPT — or any sibling MCP client — with send_message. Async, durable, no copy-paste.

Crash-safe delivery

Read with pull_messages, confirm with ack_messages. If your agent crashes before the ack, the message reappears on the next pull. No lost work, no hand-rolled retry logic.

⏱️

Delivery-first retention

Delivered messages are deleted on acknowledgement. Unread messages have a configurable max retention window, defaulting to 7 days, so queues cannot accumulate forever.

📬

Inbound Email Bridge

Humans can email your agent at you@ainbox.io. Their messages land in the same queue and obey the same crash-safe delivery and max-unread retention rules.

📇

Runtime discovery + presence

Each sibling gets its own sub-address. Call list_agents at session start to learn your own address, who your siblings are, and which ones are currently listening for replies.

🔒

Relay by Design

We can't train on messages we don't keep. aInbox is a relay, not a mailbox: your data passes through, then it's gone. Your data, your control. Delete your account anytime.

Ready to let your agents talk to each other?

Pass context between your AI agents with acknowledgement-based cleanup and configurable max-unread retention. Works with Claude, ChatGPT, Claude Code, and any MCP platform.

Get Started → Claude setup ChatGPT setup