Machine Inbox is an MCP server with 11 tools an agent can call, among them create_inbox, delete_inbox, delete_webhook. It answers at https://machineinbox.com/mcp over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 10 of 10 times since 5 September 2026; the last check, on 18 October 2026, succeeded.
Task-scoped email inboxes for AI agents: read mail, extract verification codes, and reply.
Description as the publisher wrote it.
| Tool | What it does |
|---|---|
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. Inputs: idempotency_key |
delete_inbox | Delete an inbox: revokes the token and erases stored mail. Inputs: token, inbox_id |
delete_webhook | Remove the inbox webhook. Inputs: token, inbox_id |
get_inbox | Read an inbox: address, status, expiry, limits, and usage. Inputs: token, inbox_id |
get_message | Fetch one message with parsed text, HTML, and attachment download URLs. Inputs: token, inbox_id, message_id |
get_service_info | Read the Machine Inbox service instructions: pricing, payment rails, endpoints, and limits. |
get_verification_code | Extract the newest one-time verification code or confirmation link from inbound mail. Ideal for signup and login flows. Inputs: token, inbox_id, sender |
get_webhook | Read the inbox webhook state: URL, delivery counters, and whether it is disabled. The secret is only returned by set_webhook. Inputs: token, inbox_id |
list_messages | List messages in an inbox, newest first. Pass after=<newest createdAt seen> to poll for only new mail. Inputs: token, inbox_id, limit, after, before |
reply_to_message | Send an included plain-text reply to the authenticated sender of an inbound message. Inputs: token, inbox_id, message_id, text, idempotency_key |
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. Inputs: token, inbox_id, url |
Every block below points at https://machineinbox.com/mcp. Pick your client and copy.
claude mcp add --transport http machine-inbox https://machineinbox.com/mcp
{
"mcpServers": {
"machine-inbox": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://machineinbox.com/mcp"]
}
}
}{
"mcpServers": {
"machine-inbox": {
"url": "https://machineinbox.com/mcp"
}
}
}{
"servers": {
"machine-inbox": {
"type": "http",
"url": "https://machineinbox.com/mcp"
}
}
}{
"context_servers": {
"machine-inbox": {
"url": "https://machineinbox.com/mcp"
}
}
}{
"mcpServers": {
"machine-inbox": {
"serverUrl": "https://machineinbox.com/mcp"
}
}
}{
"mcpServers": {
"machine-inbox": {
"url": "https://machineinbox.com/mcp"
}
}
}name: Machine Inbox
version: 0.0.1
schema: v1
mcpServers:
- name: Machine Inbox
type: streamable-http
url: https://machineinbox.com/mcp{
"mcpServers": {
"machine-inbox": {
"httpUrl": "https://machineinbox.com/mcp"
}
}
}{
"mcpServers": {
"machine-inbox": {
"type": "http",
"url": "https://machineinbox.com/mcp"
}
}
}{
"mcpServers": {
"machine-inbox": {
"url": "https://machineinbox.com/mcp"
}
}
}goose://extension?url=https%3A%2F%2Fmachineinbox.com%2Fmcp&type=streamable_http&id=machine-inbox&name=Machine%20Inbox
It answered our last check on 18 October 2026 in 396 ms. Over 10 checks since 5 September 2026 it answered 10. Status here comes from Neuronto's own probes, not from the publisher.
Yes. It is published by machineinbox.com and served from machineinbox.com, the vendor's own domain: https://machineinbox.com/mcp.
11, as returned by the server's own tools/list on 31 August 2026: create_inbox, delete_inbox, delete_webhook, get_inbox, get_message, get_service_info, get_verification_code, get_webhook, and 3 more.
It answered our last check on 18 October 2026 in 396 ms. Over 10 checks since 5 September 2026 it answered 10.
Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://machineinbox.com/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.
It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.
Publisher: com.machineinbox. Endpoint host: machineinbox.com. ARD identifier: urn:air:com.machineinbox:mcp:machine-inbox.
First indexed 31 August 2026. The tools are exactly what the server returned; nothing on this page
is inferred from its name. Ranking in Neuronto search is never for sale.