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Printing Press CLI for eBay. Discovery and intelligence: sold-comp pricing (average sale price over 90 days with outlier trim), auctions filtered by bid count and ending window (the query the eBay site can no longer answer), watchlists, saved searches, and a local SQLite store for cross-listing analytics. Trigger phrases: 'comp this card', 'find ebay auctions ending soon', 'what did this sell for', 'find listings under $X for ...'. Bid placement (bid, snipe, bid-group) is experimental and curren
Passed 18 of 21 test cases with the skill, and 3 of 21 without it.
and 20 more in the full report
18 fixed3 passed either way4 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 18 test cases the skill fixed. Same model, same prompt, with and without the skill.
After running authentication setup with Chrome cookies, what built-in health check command verifies system setup, dependency availability, and cookie validity?
| Checked | Without skill | With skill |
|---|---|---|
| Specifies ebay-pp-cli doctor to run the setup diagnostic check. | Missed | Passed |
The instructions your model reads when the skill loads.
This skill drives the ebay-pp-cli binary. You must verify the CLI is installed before invoking any command from this skill. If it is missing, install it first:
$HOME/.local/bin on macOS/Linux and %LOCALAPPDATA%\Programs\PrintingPress\bin on Windows:
npx -y @mvanhorn/printing-press-library install ebay --cli-only
ebay-pp-cli --version$PATH for the agent/runtime that will invoke this skill.If the npx install fails (no Node, offline, etc.), fall back to a direct Go install (requires Go 1.26.6 or newer):
go install github.com/mvanhorn/printing-press-library/library/commerce/ebay/cmd/ebay-pp-cli@latest
If --version reports "command not found" after install, the runtime cannot see the binary directory on $PATH. Do not proceed with skill commands until verification succeeds.
These capabilities aren't available in any other tool for this API.
auctions — Search active auctions filtered by bid count and ending window (e.g. "Steph Curry cards with at least 3 bids ending in next hour"). The eBay site can no longer answer this query since the Finding API was retired in February 2025.
Finds price-discoverable competition windows where last-second bidding actually moves the price.
ebay-pp-cli auctions "Steph Curry rookie" --has-bids --ending-within 1h --json --select item_id,price,bids,time_left
comp — Average sale price for any item over the last 90 days with smart matching, condition normalization, outlier trim, and percentile distribution.
When pricing a bid (or deciding whether to even bother), you need the realistic distribution of recent sales, not a single anchor. Trim handles outliers; dedupe handles title variants.
ebay-pp-cli comp "Cooper Flagg /50 Topps Chrome" --trim --json --select mean,median,sample_size
test cases passed, vs 3 / 21 without
More skills from the same source and nearby in the registry, with their headline benchmark lift.