# CuseTheJuice Custom Domain Annual Registration Payment

> CuseTheJuice Custom Domain Annual Registration Payment is a paid API for AI agents from mail.cusethejuice.com, paid per call via x402, $10/call, status down (last checked 2026-09-15).

Initiates the browser-based payment step for registering an annual custom domain on the CuseTheJuice mailbox service, paid via x402 Base USDC.

## Facts

- Endpoint: POST https://mail.cusethejuice.com/admin-api/ui/custom-domain/pay/register
- Price: $10/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mail-cusethejuice-com-17599064
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DHhlwsn28bO1TzJvR8x7o

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability mail-cusethejuice-com-17599064 -d '<json body>'
```

Example prompt: I want to register my custom domain mail.cusethejuice.com for an annual subscription — go ahead and kick off the payment step using USDC on Base so I can complete the custom domain registration.

## When to prefer this

Use this endpoint when an agent or user needs to register a new custom domain for a CuseTheJuice mailbox on an annual basis and is ready to pay via x402 Base USDC. Prefer this over sibling endpoints when the goal is specifically domain registration (not mailbox creation, message retrieval, or other mailbox operations).

## Known failure modes

- Payment not completed — x402 USDC transaction rejected or insufficient funds, returning 402 Payment Required
- Invalid or unavailable domain — domain already registered or not eligible, returning 400 or 409
- Authentication failure — missing or invalid credentials, returning 401
- Internal server error during registration process, returning 500
- Domain registration quota exceeded for account

## How this service works

CuseTheJuice agent email on Base USDC: create accounts, list and read email, send, reply, search, folders, attachments, trust index, password recovery, custom domains, and domain admin. Pay with x402 (Base USDC). HTTP shape: extensions.bazaar on the 402. Catalog: https://mail.cusethejuice.com/machine-mail.html

## Output

Returns the browser-facing payment step for annual custom domain registration, which, upon successful x402 USDC payment, records and activates the custom domain for the mailbox. The agent receives confirmation of the payment initiation and domain registration process state.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/mail-cusethejuice-com-17599064/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mail.cusethejuice.com](https://www.zero.xyz/host/mail.cusethejuice.com/llms.txt)