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Machine Inbox — Create 7-Day Private Email Inbox
x402
Machine Inbox — Create 7-Day Private Email Inbox is a paid API for AI agents from machineinbox.com, paid per call via x402, $2/call, status unknown (last checked 2026-09-16).
Creates a private, temporary email inbox that expires after seven days, returning a unique email address and access token for agent use
Price / call$2
Success—
StatusUnknown
How this service works
Pay-per-use email inboxes for software agents. Pay $2.00 through Stripe Machine Payments Protocol or x402 USDC, receive mail, and reply over HTTP.
Output
Returns a JSON object containing the new inbox's UUID, its full email address (e.g. m_example@in.machineinbox.com), the ISO 8601 expiration timestamp (7 days from creation), and a bearer token (mi_live_...) for authenticating subsequent requests to read or manage the inbox.
Example use cases
Onboarding verification inbox for agent
“Create a temporary 7-day email inbox so my onboarding bot can receive confirmation emails and replies from new users during the sign-up process.”
Support inbox for an agent fleet
“I need a private email address provisioned for my support agent that will last a week — it needs to receive and read incoming customer messages autonomously.”
Automated campaign reply collection
“Set up a disposable inbox on Machine Inbox that lasts seven days so my outreach agent can collect replies to the campaign emails it sends this week.”
Technical details
Endpoint
POSThttps://machineinbox.com/api/v1/inboxesWhen to prefer
Choose this endpoint when an AI agent needs a real, persistent email address that can receive multiple messages over an extended period (up to 7 days) rather than a one-time verification code. Prefer this over the 1-hour verification inbox when your workflow spans more than an hour or requires ongoing email communication. Ideal for agents managing multi-day workflows, onboarding sequences, or any automated process where a stable inbox identity is needed for a week.
Side effects
- Payment failure — insufficient USDC balance or x402 payment not accepted, resulting in 402 Payment Required
- Invalid request body — missing required fields returns 400 Bad Request
- Service unavailability — upstream email infrastructure down, returns 503
- Rate limiting — too many inbox creation requests in a short window, returns 429
- Authentication failure — invalid or missing payment credentials
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"inbox": {
"id": "uuid",
"address": "m_example@in.machineinbox.com",
"expiresAt": "2026-08-25T12:00:00.000Z"
},
"token": "mi_live_..."
}
}Tags
x402
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