CLAUDE + OPTIMLISTER

Write eBay listings that sell, from Claude.

Connect once and Claude writes the eBay listing the way eBay's search actually reads it: an 80-character title front-loaded with the terms buyers type, item specifics completed, and a description that states the facts Best Match rewards.

Also works with

CONNECT IN THREE STEPS

Get your key. Every Optimlister plan has an API key, Free included - it lives in your account.
Add the connector. In Claude: Settings, then Connectors, then Add custom connector. Name it Optimlister, URL https://optimlister.ai/api/mcp, and send your key as Authorization: Bearer opk_...
Ask. That is the whole setup. Your first successful connect adds 10 credits to your balance.

Key lives at your account · full setup details on the Connect your AI page.

WHY CONNECT IT

Titles built for Best Match

eBay's search rewards a keyword-dense title within the 80-character limit - the title is built from real Google demand data, since eBay does not publish its own search volumes.

Item specifics, not left blank

Listings with complete item specifics rank and convert better; the connection fills every relevant field for the category instead of leaving them for you to guess.

The other supported marketplaces

Once the eBay version is right, ask for the Amazon, Etsy or Walmart version of the same product in one message.

PASTE THIS TO START

Write my eBay listing for this product: <describe it>. Front-load the title with real search terms, fill in the item specifics, and flag anything eBay's policies would reject.

Get your key How connecting works

Questions

Does it publish straight to eBay?

Not yet from inside the chat - it writes a complete, rule-aware listing draft for you to review and paste into eBay, or to publish through Optimlister's own eBay connection once that is live on your account.

Does this cost extra on top of Claude?

The MCP server and API key come with every Optimlister plan, including Free. Tool calls price exactly like the site: listings use your monthly listings, photos and video use credits at the same rates, and free tools stay free.

Is this official MCP?

Yes - Optimlister runs a standard MCP (Model Context Protocol) server over HTTP, the same open standard Claude uses for all its connectors. One URL, one key, no extension to install.

Where do the keywords come from if eBay has no search-volume data?

From Google search demand for the same terms, plus what is currently ranking in eBay's own search results - the same proxy the eBay marketplace page on Optimlister explains.

See it work

Three steps, and what each one actually produces - words, pictures and video.

Give it what you have

A listing, a link, a photo, a product name, or the email a marketplace just sent you.

It writes, draws and checks, per marketplace

Six different listings and the images to go with them, each to that marketplace's limits and rules, with measured keywords behind the words.

You publish; it keeps watching

Files, exact fields or one-click fill; then daily rank, price and listing-health watch.

One product, six listingsExample · bamboo cutting board · pictures made by Optimlister

Why each version differs: every card is written fresh to the rule printed on it - Amazon now uses a 75-character Item name plus 125-character Item Highlights and benefit bullets, Etsy uses buyer-friendly titles and up to 13 tags, eBay uses item specifics, and Walmart uses structured attributes. The meter under each title shows how much of that marketplace's title limit the example uses. Every asset here is a real generator output with its exact cost - see the receipts.

Example Amazon image for the bamboo cutting board

Amazon75-char Item name · 125-char highlights · 5 bullets

Bamboo Cutting Board 17×11 in, Juice Groove, Reversible

Deep juice groove catches runoff from meat and fruit
Reversible: groove side for carving, flat side for bread
Knife-friendly bamboo, no dulling

Example Etsy image for the bamboo cutting board

Etsy140 chars · 13 tags · lifestyle first

Large Bamboo Cutting Board with Juice Groove - Housewarming Gift, Charcuterie Board, Kitchen Decor

cutting boardcharcuteriehousewarming giftbambookitchen decorjuice groove+7

Example eBay image for the bamboo cutting board

eBay80 chars · item specifics

Bamboo Cutting Board 17x11 Juice Groove Reversible Large Chopping Block NEW

Material: Bamboo
Size: 17 in x 11 in
Features: Juice Groove, Reversible
Condition: New

Example Walmart image for the bamboo cutting board

Walmart75 chars · key features · white main image

Bamboo Cutting Board with Juice Groove, 17 x 11 in, Reversible, Knife-Safe

Juice groove keeps counters dry
Reversible two-sided board
Hand wash, oil monthly

Example Shopify image for the bamboo cutting board

Shopify70-char SEO title · tags · alt text

Bamboo Cutting Board 17×11 with Juice Groove | Reversible

bamboocutting boardkitchengift

Example TikTok Shop image for the bamboo cutting board

TikTok Shop255 chars · attributes · video first

Large Bamboo Cutting Board with Juice Groove 17x11 - Reversible Chopping Board for Meat, Veg and Charcuterie Nights, Knife-Friendly

Material: Bamboo
Size: 17 x 11 in
Hook line for the video caption

Same product, six different texts and the right picture for each - white main image where the marketplace demands it, lifestyle where buyers browse by feel, the infographic where video and scroll do the selling. Bars show how much of the title limit is used.