Marketplace Scout Agent Skill

This skill should be used when the user asks to "search Facebook Marketplace", "find deals on Marketplace", "compare marketplace…

Context cost
32.8k tokensestimated from the bundle, loaded when it triggers
Bundle
42 files · 150.0 kB10 scripts among them — read before you run
Licence
MITthe author’s own terms
Last change
—no release on file
Servers it uses
Noneruns standalone

What it does

This skill should be used when the user asks to "search Facebook Marketplace", "find deals on Marketplace", "compare marketplace listings", "find used products", "search for deals", "find items to flip", "marketplace arbitrage", "resell for profit", "check marketplace prices", "browse marketplace near me", or "show me a dashboard of marketplace deals". Also covers mentions of secondhand goods, used electronics, local marketplace shopping, price comparisons, or buying items to resell. Supports both personal deal-finding and resale arbitrage workflows.

What this skill changes about the agent has not been set out here as a list. Its SKILL.md, shown below, says it in the author’s own words.

scraping

The skill itself

A skill is instructions the model reads, so you can see what you are getting: below is the start of its SKILL.md. The front matter loads with every session, the body loads when the skill triggers, and the whole file comes with the install.

SKILL.md9.6 kB · preview
--- name: marketplace-scout argument-hint: "[product or category to search for]" allowed-tools: - mcp__plugin_playwright_playwright__browser_navigate - mcp__plugin_playwright_playwright__browser_snapshot - mcp__plugin_playwright_playwright__browser_click - mcp__plugin_playwright_playwright__browser_type - mcp__plugin_playwright_playwright__browser_wait_for - mcp__plugin_playwright_playwright__browser_press_key - mcp__plugin_playwright_playwright__browser_hover - mcp__plugin_playwright_playwright__browser_take_screenshot - mcp__plugin_playwright_playwright__browser_evaluate - mcp__plugin_playwright_playwright__browser_select_option - mcp__plugin_playwright_playwright__browser_run_code - mcp__plugin_playwright_playwright__browser_tabs - AskUserQuestion - WebSearch - WebFetch - Write - Read - Bash - Edit ---
34# Marketplace Scout
35
36A marketplace research assistant that searches Facebook Marketplace, analyzes listings against fair market prices, grades them A+ through F, saves results to CSV, and launches an interactive dashboard.
37
38## References
39
40- **references/grading-algorithm.md** — Full grading weights, formulas, red flag definitions, and grade boundaries
41- **references/csv-schema.md** — 41-column CSV header, per-field rules, grading output shape, and searches.json index
42- **references/resale-arbitrage.md** — Complete resale/flip mode: profitable categories, eBay cross-referencing, modified grading weights
43- **references/shipping-estimates.md** — Shipping cost table by item category and eBay fee calculations
44- **references/image-extraction.md** — Playwright code pattern for extracting product images from listing pages
45- **references/anti-detection.md** — Wait timings and scroll/wait policy for Marketplace browser loops
46- **references/dashboard-guidelines.md** — Accessibility, styling, and responsive rules for dashboard modifications
47
48## Examples
49
50- **examples/sample-output.csv** — 3-row sample demonstrating the 41-column CSV schema with proper escaping, JSON-in-CSV, and signed percentages
51- **examples/sample-searches.json** — Sample search index entry showing the expected format
52
This is a preview of SKILL.md. Download or install the skill to get the whole thing.
In the file
SKILL.md1,173 words
Files42
LicenceMIT
Why you can read it

Nothing in a skill executes. The client loads the text and the model follows it, so a skill can be audited the way a runbook is — by reading it.

What it costs in context

Skills are not billed by the call. They are paid for in context: every token the instructions occupy is a token your code, your diff and your conversation cannot use. Here is what this one takes and when it takes it.

≈360
always loaded
The name and description, so the model knows the skill exists and when to reach for it.
32,390
on trigger
The instruction body and 41 supporting files, read only when the skill fires.
16.4%
of a 200k window
Ten skills this size would not fit in the window together.
050k100k150k200k context window

32.8k tokens, estimated from the bundle at four bytes to the token, held for the rest of the session once it triggers. Heavy. Teams tend to install this one per project rather than globally, and load it only when the job comes up.

Servers bill, skills cost

A server charges by the month. A skill charges once per session, in context, and then keeps charging it for as long as the session lives.

Before and after

The same question, put to the same model twice: once as it comes, and once with these instructions loaded.

No worked example has been published for this skill yet.

The procedure it runs

The procedure has not been set out here step by step. It is in the body of its SKILL.md: the start of it is shown above, and the whole file comes with the install.

Prose, not code

These steps are written for a model to follow, not executed by a runtime. It can still be told to skip one, and it will say so when it does.

Servers it uses

None. This skill calls no MCP servers at all.

Everything it needs is in the instructions, so it works in a project with nothing connected — the model reads the file and changes how it works with what it can already reach.

It does ask the agent to write files and to fetch pages, using the file and network access your client already has.

What it asks for
Writes filesyes
Network accessyes

Read from the allowed-tools line of this skill’s own SKILL.md. It also asks for Bash, which could do either, so what is not named there is not ruled out. A skill grants no permissions of its own — it can only ask for tools your client already has.

What it will not do

Every skill is narrow, and the useful ones say where they stop. These are the jobs this one is the wrong tool for.

What this skill is not for has not been published here. Nothing is implied by that: it is a section the author has not filled in.

What is in the bundle

42 files, 150.0 kB on disk. Mostly text — the instructions the model reads — with 10 scripts in it that your client would run only if the instructions tell it to. 1 file of its source is not in the download — listed after these, with why.

  • SKILL.md9.6 kB
  • examples/sample-output.csv2.7 kB
  • examples/sample-searches.json0.4 kB
  • references/anti-detection.md0.6 kB
  • references/csv-schema.md3.2 kB
  • references/dashboard-guidelines.md1.2 kB
  • references/grading-algorithm.md1.7 kB
  • references/image-extraction.md1.5 kB
  • references/resale-arbitrage.md5.3 kB
  • references/shipping-estimates.md2.3 kB
  • scripts/ensure-dashboard.sh2.0 kB
  • assets/dashboard/eslint.config.js0.6 kB
  • assets/dashboard/index.html0.6 kB
  • assets/dashboard/package.json0.9 kB
  • assets/dashboard/tsconfig.app.json0.7 kB
  • assets/dashboard/tsconfig.json0.6 kB
  • assets/dashboard/tsconfig.node.json0.7 kB
  • assets/dashboard/vite.config.ts0.3 kB
  • assets/dashboard/src/App.tsx5.5 kB
  • assets/dashboard/src/main.tsx0.2 kB
  • assets/dashboard/src/components/DetailPanel.tsx7.8 kB
  • assets/dashboard/src/components/ErrorBoundary.tsx1.2 kB
  • assets/dashboard/src/components/GradeBadge.tsx1.0 kB
  • assets/dashboard/src/components/Header.tsx1.6 kB
  • assets/dashboard/src/components/ListingCard.tsx4.0 kB
  • assets/dashboard/src/components/ListingGrid.tsx2.0 kB
  • assets/dashboard/src/components/ListingTable.tsx3.5 kB
  • assets/dashboard/src/components/NavTabs.tsx1.2 kB
  • assets/dashboard/src/components/SearchTabs.tsx1.6 kB
  • assets/dashboard/src/components/Sidebar.tsx5.3 kB
  • assets/dashboard/src/components/StatsBar.tsx5.7 kB
  • assets/dashboard/src/components/ViewToggle.tsx1.0 kB
  • assets/dashboard/src/hooks/useListings.ts4.7 kB
  • assets/dashboard/src/hooks/useTheme.ts1.1 kB
  • assets/dashboard/src/styles/global.css46.7 kB
  • assets/dashboard/src/types/listing.ts2.5 kB
  • assets/dashboard/src/utils/csv.ts4.2 kB
  • assets/dashboard/src/utils/filters.ts1.6 kB
  • assets/dashboard/src/utils/grades.ts1.2 kB
  • assets/dashboard/src/utils/sort.ts0.8 kB
  • assets/dashboard/src/views/AnalyticsView.tsx4.2 kB
  • assets/dashboard/src/views/FlipsView.tsx6.5 kB

Not in the download

Not carried is a type a skill download does not hold. Take it from its source.

  • assets/dashboard/public/data/.gitkeepnot carried
What is not in it

A skill installs nothing and depends on nothing: it is a folder your client reads. This one carries 10 scripts beside the text, so the download is 42 files — not the whole of its source: 1 file is left out. It is listed under the files, with why. The MIT licence covers the templates and examples as well as the instructions.

Install

Installing copies the bundle into your project. Nothing runs at install time — the files sit on disk until the model reads them.

# Marketplace Scout · 32.8k tokens when loaded · macOS, Linux mkdir -p .claude/skills && t=$(mktemp -d) && curl -fsSL -o "$t/bundle.tar.gz" https://mcprush.com/api/skills/marketplace-scout/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/marketplace-scout" ] && { [ ! -e .claude/skills/marketplace-scout ] || { mv .claude/skills/marketplace-scout "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/marketplace-scout" .claude/skills/ && echo "Installed .claude/skills/marketplace-scout"
On Windows, or any OS with Node 20+
npx mcprush@latest skill add brightops-ai/marketplace-scout

Windows PowerShell says 'running scripts is disabled on this system'? Run Set-ExecutionPolicy -Scope CurrentUser RemoteSigned once, or type npx.cmd instead of npx (codex.cmd, gemini.cmd, grok.cmd likewise). PowerShell 7 needs neither. Writes to .claude/skills/marketplace-scout/ in the current project. For every project instead, run mkdir -p ~/.claude/skills && t=$(mktemp -d) && curl -fsSL -o "$t/bundle.tar.gz" https://mcprush.com/api/skills/marketplace-scout/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/marketplace-scout" ] && { [ ! -e ~/.claude/skills/marketplace-scout ] || { mv ~/.claude/skills/marketplace-scout "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/marketplace-scout" ~/.claude/skills/ && echo "Installed ~/.claude/skills/marketplace-scout" (macOS, Linux) — or add --global to the npx line. The curl line replaces .claude/skills/marketplace-scout/ only after the download succeeds, so files left there by another skill of the same name, or by an older release, do not mix in. A copy already there is moved aside, not deleted, and the line prints where. Not in this download: 1 file of its source (which one, and why). Take it from its source.

Which clients pick it up on their own

A skill is a folder of text. Most of these read a skills folder and pick it up without being told; the rest take the same folder another way — an upload in the app, a parameter on an API call — and then choose it by its description just the same.

Claude Code.claude/skills/
Claude DesktopCustomize › Skills
ChatGPTSkills › Create › Upload
Cursor.cursor/skills/
VS Code.github/skills/
Codex CLI.agents/skills/
Gemini CLI.gemini/skills/
Grok Build.grok/skills/
Microsoft CopilotSkills › Upload a skill
PerplexityComputer › Skills › Upload a skill
DeepSeek Harness.dsh/skills/
Zed.agents/skills/
Devin Desktop.devin/skills/
Windsurf (legacy).windsurf/skills/
OpenAI Agents SDKInstructions or sandbox Skills
HTTP / APIa request parameter
This release
Versionnot versioned
Publishedno release date on file
PriceFree
Referencebrightops-ai/marketplace-scout

Versions

Its author publishes no version number, so there is nothing here to pin to: what you install is the folder as it stands today. Instructions change more often than APIs do — a skill can be rewritten entirely without anything it depends on moving.

Pinning

Nothing to pin to: this skill carries no version number of its own. What you install is what the folder holds on the day you install it.

Reviews

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Who wrote it

BA
brightops-ai

Publishes on mcprush.

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