x402 Machine to Machine Email Server

What this is. A real mail domain (Postfix, Maildir, optional Dovecot) behind paid HTTP flows: create mailboxes with x402, send mail, and list, fetch, or parse messages. It turns standard email into a metered API your automation can call.

Why machines use it. Agents often need to reach another organization without registering a separate OAuth app or bespoke webhook for every counterparty. SMTP is universal, asynchronous, and works across trust boundaries; the same inbox can receive mail from humans and software. x402 charges per operation so programmatic access stays practical without open-ended abuse.

Create mailboxes (x402) and read mail via paid list / fetch / attachment-parse flows. All mailbox tools lists every human flow. For routing and spam-check details, see How it works.

OpenClaw + OWS (x402 API https://mail.cusethejuice.com/admin-api) · Public GitHub — skill & OWS scripts

Pricing

Action	Price	What you get
Create mailbox	1.49 USDC	Provision a new mailbox account through the admin UI x402 flow.
List messages	0.001 USDC	Get a paid list of recent messages with Maildir id, subject, and date.
Get one message	0.001 USDC	Fetch full headers and body for a single message id.
Parse attachments	0.001 USDC	Extract attachment metadata, previews, and small payloads.
Send outbound mail	0.009 USDC	Send one outbound message through the mailbox over SMTP submission.
Move message	0.001 USDC	`POST /machine/request/move` — move a Maildir message between folders.
Delete message	0.001 USDC	`POST /machine/request/delete` — delete one message file.
Forward message	0.001 USDC	`POST /machine/request/forward` — forward via SMTP.
Reply	0.001 USDC	`POST /machine/request/reply`.
Reply all	0.001 USDC	`POST /machine/request/reply-all`.
Create folder	0.001 USDC	`POST /machine/request/folder/create` — Dovecot Maildir folder.
Rename folder	0.001 USDC	`POST /machine/request/folder/rename`.
Delete folder	0.001 USDC	`POST /machine/request/folder/delete`.
Reset mailbox password	1.00 USDC	Change password after proving the current password (`/machine/request/mailbox/reset-password`).
Download mailbox (Maildir zip)	1.00 USDC	HTTPS link to a zip of `~/Maildir`; link expires after 1 hour or 3 downloads (`/machine/request/mailbox/download`).
Add recovery email	1.00 USDC	While logged in, register a recovery address on a domain not hosted here (same list as create-user domains; `/machine/request/mailbox/recovery-email`).
Account recovery — request code	1.00 USDC	Forgot password: request a code to your registered recovery address (`/machine/request/account-recovery/request`).
Account recovery — set new password	1.00 USDC	Submit recovery code and new password (`/machine/request/account-recovery/complete`).
Check mailbox quota	0.001 USDC	Show configured quota (SQLite) and `doveadm quota get` output for the mailbox.
Storage 100 MB	1.00 USDC	Raises mailbox Maildir quota to 100 MB (over default 10M).
Storage 500 MB	3.00 USDC	Raises mailbox Maildir quota to 500 MB.
Storage 1 GB	5.00 USDC	Raises mailbox Maildir quota to 1 GB.

These prices are read live from the server mail policy configuration, so the page reflects the current configured USDC amounts. Per-action mailbox prices fall back to the server default mailbox action price (0.001 USDC) when unset.

What you can do here

Create user — New mailbox account after x402 payment.
List messages — Paid list of recent messages (Maildir id, subject, date).
Get message — Paid fetch full headers and body for one message id.
Parse attachments — Paid extract attachment metadata, previews, and small base64 payloads.
Check mailbox quota — Paid view Dovecot quota and SQLite tier row.
Send message — Paid outbound mail from your mailbox (To / CC / BCC, subject, body).
Storage upgrade — Paid higher Maildir quota (SQLite + Dovecot).
Reset mailbox password — 1.00 USDC; must know current password.
Download mailbox (zip) — 1.00 USDC; link expires in 1 hour or after 3 downloads.
Add recovery email — 1.00 USDC; external address for forgot-password flow.
Account recovery (forgot password) — 1.00 USDC; code is emailed right after the fee (compose → pay, same idea as Send message).
Complete recovery (have code) — 1.00 USDC · compose (email, username) → pay → recovery code + new password.

Links use the same origin as this page (typically your mail host over HTTPS). Inbound domains and Postfix routing are configured on the server.