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Auction Bidding by Email

Place bids on Yahoo! Auctions Japan simply by sending an email.
No special software or login required — just your regular email.

How It Works

Send an email to the dedicated address provided to you, and our system will automatically register your bids and place them at the right time.

Registration required: Only pre-registered email addresses can use this service. If you would like to start using email bidding, please contact us at order@cathandsagent.com.
If you don't receive a reply, the system may be temporarily down. Please contact order@cathandsagent.com for assistance.

1. Placing a Bid — order

To register a new bid, send an email with the subject line order.

In the email body, write one auction per line in this format:

MaxPrice,Bidding Time,Auction URL
Spaces around commas are fine — the system handles them automatically.

If you send an order for the same auction URL again, the previous entry will be updated with the new price and time.

You can include multiple auctions in a single email — just put each one on its own line.

Full Example

Subject: order
Body:
5500,2026-02-11-22-00,https://auctions.yahoo.co.jp/jp/auction/sample1111
4100,30,https://auctions.yahoo.co.jp/jp/auction/sample2222
9100,0,https://auctions.yahoo.co.jp/jp/auction/sample3333
330,,https://auctions.yahoo.co.jp/jp/auction/sample4444

This single email registers three separate auction bids at once.

2. Smart Timing — Automatic Bid Scheduling

You don't have to calculate the exact bid time yourself. The system offers convenient shortcuts:

Option A: Leave it blank (default = 6 minutes before end)

Simply leave the time field empty (two commas in a row), and the system will automatically bid 6 minutes before the auction ends.

4100,,https://auctions.yahoo.co.jp/jp/auction/sample5555

Option B: Bid immediately

Enter 0(ZERO) to place the bid right away, without waiting.

4100,0,https://auctions.yahoo.co.jp/jp/auction/sample6666

Option C: Specify minutes before end

Enter a number to tell the system how many minutes before the auction ends to place the bid. For example, 30 means "bid 30 minutes before the end."

4100,30,https://auctions.yahoo.co.jp/jp/auction/sample7777

Option D: Specify an exact date and time

If you need precise control, provide the full date and time in this format:

YYYY-MM-DD-HH-mm

4100,2026-02-11-04-39,https://auctions.yahoo.co.jp/jp/auction/sample8888

Example: 2026-02-11-04-39
(February 11, 2026, at 4:39 AM)
Important: Always use two digits for each part.
Correct: 2026-02-11-04-39
Wrong: 2026-2-11-4-39

3. Removing a Bid — remove

Changed your mind? Send an email with the subject line remove.

In the body, simply paste the auction URL(s) you want to cancel — one per line. No price or time needed.

Example

Subject: remove
Body:
https://auctions.yahoo.co.jp/jp/auction/sample9999

4. Checking Your List — list

Want to see all the auctions you've registered? Send an email with the subject line list.

The body can be left completely empty. The system will reply with a full list of your active bids.

Example

Subject: list
Body: (empty)

5. Notifications

The system will automatically send you email notifications for important events:

Quick Reference

Action     Subject     Body
──────────────────────────────────────────
Place bid    order      Price,Time,URL
Cancel bid   remove     URL (one per line)
View bids    list       (leave empty)