# CuseTheJuice Mailbox Reply to Message

> CuseTheJuice Mailbox Reply to Message is a paid API for AI agents from mail.cusethejuice.com, paid per call via x402, $0.01/call, status down (last checked 2026-09-16).

Replies to a specific email message in a CuseTheJuice mailbox, prepending optional text before the quoted original and sending to the Reply-To or From address.

## Facts

- Endpoint: POST https://mail.cusethejuice.com/admin-api/machine/request/reply
- Price: $0.01/call
- Payment: x402
- Status: down
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mail-cusethejuice-com-f1ead977
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XuZKKLdCfXW8SfOvHXjAO

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-f1ead977 -d '<json body>'
```

Example prompt: Reply to message ID 'abc123' in my CuseTheJuice mailbox (username: myuser, email: myuser@cusethejuice.com) from the INBOX folder, saying 'Thanks for reaching out, I'll follow up by end of week.'

## When to prefer this

Use this endpoint when an AI agent needs to programmatically reply to a specific received email in a CuseTheJuice mailbox, automatically quoting the original message. Prefer over the reply-all variant when you only want to respond to the original sender (not CC recipients). Suitable for automated email workflows where responses need to be triggered by message ID.

## Known failure modes

- Invalid credentials (wrong email, username, or password) — authentication failure
- Message ID not found in the specified folder — 404 or not found error
- Source folder does not exist — folder not found error
- Payment failure via x402 — 402 response requiring USDC payment on Base
- Malformed email or missing required fields — 400 validation error
- SMTP delivery failure — downstream send error

## 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

A confirmation that the reply was sent, including status of the outbound message delivered to the Reply-To or From address of the original, with the quoted original included in the reply body.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/mail-cusethejuice-com-f1ead977/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)