Machine Inbox MCP Server

by machineinbox Your server? Claim it

answering

Machine Inbox is answering right now. Last checked 13 min ago. It exposes 11 tools.

Task-scoped email inboxes for AI agents: read mail, extract verification codes, and reply.

Uptime history 14 days of history

14 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

252 ms

Response time

average over 24h

open, no key

Access

streamable-http

Nothing serious here today

Today is the operative word: we check Machine Inbox every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 13 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add machine-inbox --transport http https://machineinbox.com/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "machine-inbox": {
      "url": "https://machineinbox.com/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.machine-inbox]
url = "https://machineinbox.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "machine-inbox": {
      "url": "https://machineinbox.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "machine-inbox": {
      "url": "https://machineinbox.com/mcp"
    }
  }
}

Available tools 11

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

inbox

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.

delete_inbox

Delete an inbox: revokes the token and erases stored mail.

get_inbox

Read an inbox: address, status, expiry, limits, and usage.

webhook

delete_webhook

Remove the inbox webhook.

get_webhook

Read the inbox webhook state: URL, delivery counters, and whether it is disabled. The secret is only returned by set_webhook.

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.

message

get_message

Fetch one message with parsed text, HTML, and attachment download URLs.

messages

list_messages

List messages in an inbox, newest first. Pass after=<newest createdAt seen> to poll for only new mail.

reply_to_message

Send an included plain-text reply to the authenticated sender of an inbound message.

service

get_service_info

Read the Machine Inbox service instructions: pricing, payment rails, endpoints, and limits.

verification

get_verification_code

Extract the newest one-time verification code or confirmation link from inbound mail. Ideal for signup and login flows.

Endpoints

URL	Transport	State	Latency	Checked
https://machineinbox.com/mcp	streamable-http	answering	70 ms	13 min ago

Alternatives to Machine Inbox

same job, measured the same way

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Agenticmail

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smails

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Free disposable email for AI agents: a throwaway inbox to read verification codes over MCP.

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MailFlat

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Real email inboxes for AI agents: open an address, read the one-time code, send mail.

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Sv Number

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Phone numbers for AI agents: order a private number, read the SMS verification code, hand it back.

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Botcall MCP

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Give your AI agent a real phone number for SMS verification codes.

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Machine Inbox — questions

Answers built from our own checks of this server.

What can Machine Inbox do?

It exposes 11 tools, read directly from the server on our last check. Among them: create_inbox, delete_inbox, delete_webhook, get_inbox, get_message, get_service_info and 5 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

What is Machine Inbox mostly used for?

Its tools cluster around inbox and webhook. That is what this server is built to work with — the grouping comes from the actual tool names, not from a category we assigned.

Is Machine Inbox working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 252 ms. The bar chart above shows every period we have measured.

How do I connect Machine Inbox?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Machine Inbox need an API key?

No. Machine Inbox completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 11 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Machine Inbox?

It answers our handshake in 252 ms on average, which is faster than 64% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.