machine-inbox
Task-scoped email inboxes for AI agents: read mail, extract verification codes, and reply.
What it can do
What data it sees
Do you need an account
No: the server works without sign-in
Task-scoped email inboxes for AI agents: read mail, extract verification codes, and reply.
How to connect
How to connect machine-inbox to Claude
The server address to paste into Claude settings:
https://machineinbox.com/mcp
- Open Claude (claude.ai or the desktop app).
- Go to Settings → Connectors.
- Click Add custom connector.
- Paste the server address copied below into Remote MCP server URL and click Add.
- In a chat, click + → Connectors and switch the new connector on.
Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.
Authorization
After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.
How to connect machine-inbox to ChatGPT
The server address to paste into ChatGPT settings:
https://machineinbox.com/mcp
- Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
- Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
- Open Settings → Connectors and click Create.
- Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
- Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
- In a new chat open + → Apps/Connectors and enable the connector.
OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.
Authorization
On first use ChatGPT opens the service's sign-in window. Sign in and approve access.
How to connect machine-inbox to Cursor
The server address to paste into Cursor settings:
https://machineinbox.com/mcp
Fastest: click Open in Cursor below and confirm the prompt.
Manually:
- In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
- Paste the JSON copied below into
~/.cursor/mcp.json(per project:.cursor/mcp.jsonin the repo root). - Save the file. The server appears in the MCP list; authorize it there if asked.
Authorization
If the service needs sign-in, an authorize button appears next to the server in the MCP list.
Server tool list (11)
Raw names from tools/list. Only developers need these.
| get_service_info | Read the Machine Inbox service instructions: pricing, payment rails, endpoints, and limits. |
| create_inbox | Request a new paid inbox. Buying requires an out-of-band payment (Stripe MPP or x402 USDC on Base); this tool returns the live HTTP 402 payment challenge plus exact instructions to complete the purchase. Standard inbox: $2.00. |
| get_inbox | Read an inbox: address, status, expiry, limits, and usage. |
| list_messages | List messages in an inbox, newest first. Pass after=<newest createdAt seen> to poll for only new mail. |
| get_message | Fetch one message with parsed text, HTML, and attachment download URLs. |
| get_verification_code | Extract the newest one-time verification code or confirmation link from inbound mail. Ideal for signup and login flows. |
| reply_to_message | Send an included plain-text reply to the authenticated sender of an inbound message. |
| set_webhook | Register or replace the inbox webhook: an HMAC-signed POST fires on every inbound message with metadata, extracted verification codes, and injection risk (never the body). Returns the signing secret. |
| get_webhook | Read the inbox webhook state: URL, delivery counters, and whether it is disabled. The secret is only returned by set_webhook. |
| delete_webhook | Remove the inbox webhook. |
| delete_inbox | Delete an inbox: revokes the token and erases stored mail. |