Pp Offerup

OfferUp — Printing Press CLI

Prerequisites: Install the CLI

This skill drives the offerup-pp-cli binary. You must verify the CLI is installed before invoking any command from this skill. If it is missing, install it first:

1. Install via the Printing Press installer. It defaults binaries to $HOME/.local/bin on macOS/Linux and %LOCALAPPDATA%\Programs\PrintingPress\bin on Windows:

   npx -y @mvanhorn/printing-press-library install offerup --cli-only
   

2. Verify: offerup-pp-cli --version
3. Ensure the reported install directory is on $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/offerup/cmd/offerup-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.

When to Use This CLI

Use this CLI when an agent or user needs local-marketplace data from OfferUp: searching listings near a ZIP, pulling an item's full detail, vetting a seller, or — its real edge — answering price questions (what's the going rate, what's underpriced, what dropped) over a local store of listings. All of that works with no login. When logged in (auth login --chrome), it also manages your own account: your listings (view active/archived, mark sold, archive), saved lists, and messages. It does not create listings (OfferUp web posts Jobs only; listing creation is mobile-app-only) or send messages.

When Not to Use This CLI

The public commands are read-only. The authenticated commands add two account mutations — my-listings mark-sold and my-listings archive — both gated behind login and an explicit --confirm. Do not use this CLI to create/post a listing (mobile-app-only), send messages, make or accept offers, purchase, or otherwise change remote state it does not expose.

Unique Capabilities

These capabilities aren't available in any other tool for this API.

Local price intelligence

• price-check — See the real going rate for an item in your area — median, 25th/75th percentile, min, max, and the firm-vs-negotiable split — computed across every listing you've pulled.

  Reach for this before buying or pricing a resale — it answers "what is this actually worth here" with a number instead of a scroll.

  offerup-pp-cli price-check "herman miller aeron" --zip 85001 --agent
  

• deals — Surface listings priced a chosen percentage below the local median for that item — the underpriced finds, ranked by how far under they are.

  The deal-sniping command: it tells an agent which listings are underpriced right now, not just what exists.

  offerup-pp-cli deals "dewalt drill" --zip 98101 --below 25 --agent
  

• price-drops — Detect listings whose price fell between syncs — the same item, now cheaper — sorted by the size of the drop.

  Catches sellers who just cut a price on something you're tracking — the moment to make an offer.

  offerup-pp-cli price-drops "macbook pro" --since 7d --agent
  

Track saved searches

• new-since — Show only the listings that appeared since a cutoff for a saved search, so you never re-scan items you already saw.

  Use this for a recurring watch — it answers "what dropped since I last looked" in one call.

  offerup-pp-cli new-since "road bike" --since 24h --agent
  

• digest — A single composite report for a saved search combining what's new, what dropped in price, and what's underpriced.

  The morning-ritual command and the natural single MCP tool call for an agent watching a market.

  offerup-pp-cli digest "snowboard" --since 24h --agent
  

Seller intelligence

• seller-scan — Pull a seller's full synced inventory alongside their reputation badges (business/dealer/TruYou), join date, and the median asking price across their listings.

  Vet a dealer before buying to flip, or watch a high-volume seller's pricing in one view.

  offerup-pp-cli seller-scan 161842229 --agent
  

Authenticated Commands (login required)

These act on the user's own OfferUp account and need a captured session. Auth is the OfferUp web session cookie, captured once via the press-auth companion through a controlled Chrome login window (no API key; the session is encrypted at rest). All public commands above need none of this.

offerup-pp-cli auth login --chrome     # one-time: opens Chrome, captures the session
offerup-pp-cli auth status --json      # {"loggedIn": true, "pressAuthInstalled": true}
offerup-pp-cli account --agent         # your own profile + reputation (auth tokens never surfaced)
offerup-pp-cli my-listings --agent     # your active listings
offerup-pp-cli my-listings archived --agent
offerup-pp-cli saved --agent           # your saved/favorited lists
offerup-pp-cli messages --agent        # your message threads
offerup-pp-cli messages read <discussion-id> --agent

Mutations preview by default and apply only with --confirm:

offerup-pp-cli my-listings mark-sold <listing-id> --confirm
offerup-pp-cli my-listings archive <listing-id> --confirm

Without login, these commands exit with an auth error pointing at auth login --chrome (exit code 4). Creating a new listing is not supported (mobile-app-only).

HTTP Transport

This CLI uses Chrome-compatible HTTP transport for browser-facing endpoints. It does not require a resident browser process for normal API calls.

Command Reference

listings — Search and view OfferUp listings (public, no login)

• offerup-pp-cli listings get — Get the full detail for one listing
• offerup-pp-cli listings search — Search live OfferUp listings by keyword and location

Finding the right command

When you know what you want to do but not which command does it, ask the CLI directly:

offerup-pp-cli which "<capability in your own words>"

which resolves a natural-language capability query to the best matching command from this CLI's curated feature index. Exit code 0 means at least one match; exit code 2 means no confident match — fall back to --help or use a narrower query.

Recipes

Narrow a verbose search for an agent

offerup-pp-cli listings search "macbook pro" --zip 98101 --agent --select listingId,title,price,locationName,conditionText

Listing payloads are wide; --agent with --select returns only the fields an agent needs, saving context.

Find this week's underpriced finds

offerup-pp-cli deals "aeron chair" --zip 85001 --below 30 --agent

Lists Aeron chairs priced at least 30% below the local median around Phoenix.

Daily watch on a saved search

offerup-pp-cli digest "road bike" --since 24h --agent

One call returns what's new, what dropped in price, and what's a deal for road bikes since yesterday.

Vet a seller before buying to flip

offerup-pp-cli seller-scan 161842229 --agent

Shows the seller's badges, join date, full inventory, and median asking price in one view.

Auth Setup

Public commands need no login: search, item detail (listings get), seller lookup, category-scoped browse, and every price-intelligence command (price-check, deals, new-since, price-drops, digest, seller-scan). Set location with --zip (or --lat/--lon), not a credential. Account commands act on your own OfferUp account and require login: account (your profile), my-listings (plus archived, mark-sold, archive), saved, and messages (plus messages read). Auth is your OfferUp web session cookie. Capture it once with auth login --chrome, which extracts the cookie straight from your logged-in browser — no extra install needed. The optional press-auth companion adds a smoother one-click controlled-Chrome capture and encrypts the session at rest, but it is not required. You can also paste the cookie via the OFFERUP_COOKIE environment variable or auth set-token. Check with auth status, clear with auth logout. The mutating commands my-listings mark-sold and my-listings archive preview by default and apply only with --confirm. Creating a new listing is not supported — OfferUp's web app posts Jobs only, so listing creation is mobile-app-only.

Run offerup-pp-cli doctor to verify setup.

Agent Mode

Add --agent to any command. Expands to: --json --compact --no-input --no-color --yes.

• Pipeable — JSON on stdout, errors on stderr

• Filterable — --select keeps a subset of fields. Dotted paths descend into nested structures; arrays traverse element-wise. Critical for keeping context small on verbose APIs:

  offerup-pp-cli listings get mock-value --agent --select id,name,status
  

• Previewable — --dry-run shows the request without sending

• Offline-friendly — sync/search commands can use the local SQLite store when available

• Non-interactive — never prompts, every input is a flag

• Read-only — do not use this CLI for create, update, delete, publish, comment, upvote, invite, order, send, or other mutating requests

Response envelope

Commands that read from the local store or the API wrap output in a provenance envelope:

{
  "meta": {"source": "live" | "local", "synced_at": "...", "reason": "..."},
  "results": <data>
}

Parse .results for data and .meta.source to know whether it's live or local. A human-readable N results (live) summary is printed to stderr only when stdout is a terminal AND no machine-format flag (--json, --csv, --compact, --quiet, --plain, --select) is set — piped/agent consumers and explicit-format runs get pure JSON on stdout.

Agent Feedback

When you (or the agent) notice something off about this CLI, record it:

offerup-pp-cli feedback "the --since flag is inclusive but docs say exclusive"
offerup-pp-cli feedback --stdin < notes.txt
offerup-pp-cli feedback list --json --limit 10

Entries are stored locally at ~/.local/share/offerup-pp-cli/feedback.jsonl. They are never POSTed unless OFFERUP_FEEDBACK_ENDPOINT is set AND either --send is passed or OFFERUP_FEEDBACK_AUTO_SEND=true. Default behavior is local-only.

Write what surprised you, not a bug report. Short, specific, one line: that is the part that compounds.

Output Delivery

Every command accepts --deliver <sink>. The output goes to the named sink in addition to (or instead of) stdout, so agents can route command results without hand-piping. Three sinks are supported:

Unknown schemes are refused with a structured error naming the supported set. Webhook failures return non-zero and log the URL + HTTP status on stderr.

Named Profiles

A profile is a saved set of flag values, reused across invocations. Use it when a scheduled agent calls the same command every run with the same configuration - HeyGen's "Beacon" pattern.

offerup-pp-cli profile save briefing --json
offerup-pp-cli --profile briefing listings get mock-value
offerup-pp-cli profile list --json
offerup-pp-cli profile show briefing
offerup-pp-cli profile delete briefing --yes

Explicit flags always win over profile values; profile values win over defaults. agent-context lists all available profiles under available_profiles so introspecting agents discover them at runtime.

Exit Codes

Argument Parsing

Parse $ARGUMENTS:

1. Empty, help, or --help → show offerup-pp-cli --help output
2. Starts with install → ends with mcp → MCP installation; otherwise → see Prerequisites above
3. Anything else → Direct Use (execute as CLI command with --agent)

MCP Server Installation

1. Install the MCP server:

   go install github.com/mvanhorn/printing-press-library/library/commerce/offerup/cmd/offerup-pp-mcp@latest
   

2. Register with Claude Code:

   claude mcp add offerup-pp-mcp -- offerup-pp-mcp
   

3. Verify: claude mcp list

Direct Use

1. Check if installed: which offerup-pp-cli If not found, offer to install (see Prerequisites at the top of this skill).
2. Match the user query to the best command from the Unique Capabilities and Command Reference above.
3. Execute with the --agent flag:

   offerup-pp-cli <command> [subcommand] [args] --agent
   

4. If ambiguous, drill into subcommand help: offerup-pp-cli <command> --help.