marketplace-finder

Search Facebook Marketplace without a Facebook account or API key. Find listings by keyword near any location, filter by price, condition and date, open a listing for its photos, description and seller details, and look up Marketplace locations. Use this skill for deal hunting, resale price research, finding local items, or monitoring Marketplace for a product.

Marketplace Finder: Facebook Marketplace Search

Search Facebook Marketplace from chat: listings near any city, filtered by price and condition, and the full details of any listing.

No Facebook account, no API key, no app to connect. Calls are paid from ClawLink credit, most for a fraction of a cent, and every new account starts with $0.50 free. Powered by ClawLink.

Setup in 3 Steps

Step 1: Install	Step 2: Pair	Step 3: Ask
Install the ClawLink plugin in OpenClaw	Sign in and approve the device once	Ask in plain English; no app to connect

What You Can Ask

• “Find road bikes for sale on Facebook Marketplace in San Francisco”
• “What do used iPhone 15s sell for near Chicago?”
• “Show me sofas under $300 listed this week near Austin”
• “Open this Marketplace listing”

When to Use This Skill

Use it when the user wants Facebook Marketplace listings or prices.

Do not use it for the user's own private accounts or for anything that posts, sends or changes data: these tools only read public information.

How It Works

text

┌─────────────────┐     ┌──────────────┐     ┌──────────────────┐
│   OpenClaw      │────▶│   ClawLink   │────▶│ FB Marketplace   │
│   (User Chat)   │     │ (data tools) │     │ (public data)    │
└─────────────────┘     └──────────────┘     └──────────────────┘
         │                       │                       │
         │  1. Install plugin    │                       │
         │  2. Pair device once  │                       │
         │  3. Ask a question    │                       │
         │                       │  4. Fetch + trim      │
         │                       │  5. Charge credit     │
         ▼                       ▼                       ▼
   ┌──────────┐           ┌──────────┐           ┌──────────┐
   │  Answer  │           │  Credit  │           │ Results  │
   │ in chat  │           │ ($0.50)  │           │ as JSON  │
   └──────────┘           └──────────┘           └──────────┘

ClawLink holds the data-provider accounts. The user never pastes a key, and nothing is installed beyond the plugin.

Install

Install the ClawLink plugin from ClawHub when the user asks for it:

bash

openclaw plugins install clawhub:clawlink-plugin

The install applies to the running Gateway: do not restart it. The ClawLink tools appear on your next turn, so end this turn and tell the user: "ClawLink is installed. Reply ok and I will give you your pairing link." On the next turn call clawlink_begin_pairing, give the user the link, and after they approve call clawlink_get_pairing_status. Pairing happens once; after that every tool below works with no further setup.

Tool Reference

Prices are what ClawLink charges per call, from the user's credit. The tool's own description (via clawlink_describe_tool) always shows the current price.

Marketplace

Tool	What it returns	Price
facebookdata_marketplace_search	Search Facebook Marketplace listings near a point	$0.00282
facebookdata_marketplace_item	One Facebook Marketplace listing by id or URL: price, description, condition, location, seller, photos	$0.00282
facebookdata_marketplace_location_search	Find a place for marketplace_search: a city or area name to latitude and longitude	$0.00282

Recipes

Price a used item

1. facebookdata_marketplace_location_search for the city's coordinates if you do not know them.
2. facebookdata_marketplace_search near them.
3. Drop outliers and report the typical price range.

Code Examples

Search near a city

bash

clawlink_call_tool --tool "facebookdata_marketplace_search" \
  --params '{"query": "road bike", "lat": 37.7749, "lng": -122.4194, "radius_km": 40}'

One listing

bash

clawlink_call_tool --tool "facebookdata_marketplace_item" \
  --params '{"url": "https://www.facebook.com/marketplace/item/LISTING_ID"}'

Discovery Workflow

1. Call clawlink_search_tools with a short query (for example marketplace); public-data tools show as connected for every user.
2. Call clawlink_describe_tool before the first call of a tool: it returns the parameters, defaults and price.
3. Treat the live catalog as the source of truth. If a tool named here is missing, say so; do not invent results.

Execution Workflow

text

┌───────────────────────────────────────────────────────────┐
│  READ-ONLY, PAID PER CALL                                │
│  search → describe → call → summarise for the user       │
│                                                          │
│  Ask before: loops over many items, or a call that costs │
│  more than a few cents (the price is in the description) │
└───────────────────────────────────────────────────────────┘

1. Every tool here only reads public data; nothing is posted or changed.
2. Each call costs credit. Before looping over more than about ten items, or before a call priced above a few cents, tell the user what it will cost and ask.
3. A failed call is refunded automatically. Read the error's hint: it says what to change. Do not retry the same arguments unchanged.

Notes

• Search needs lat and lng; facebookdata_marketplace_location_search finds them from a place name.
• Listings change fast; say when you checked.
• Never arrange payment or contact sellers on the user's behalf.

Error Handling

Status / Error	Meaning
No listings	Widen radius_km or simplify the query.
credit_exhausted	The user's ClawLink credit is used up. Tell them to top up at https://claw-link.dev/dashboard/billing?utm_source=clawhub&utm_medium=referral&utm_content=marketplace-finder; do not retry.
data_provider_unavailable	ClawLink's data provider is down. Nothing was charged. Try again later.
no_result	The provider found nothing for these arguments. Nothing was charged.
invalid_arguments	A parameter is missing or malformed. Call clawlink_describe_tool and fix it.

Troubleshooting

Tools not visible after install

1. The tools appear on the turn after the install, not in the same turn.
2. If they still do not appear, the OpenClaw tool profile may hide plugin tools. This is a config change for the OpenClaw owner; do not change the config yourself. Tell the user: "Your OpenClaw tool profile hides plugin tools. In the Control UI (or ~/.openclaw/openclaw.json), add clawlink-plugin to tools.alsoAllow, then ask me again."
3. On OpenClaw versions before 2.0, the tool list can load only in a new chat: tell the user to send /new and ask again.

A tool keeps failing with correct input

Report it with clawlink_report_issue (or clawlink_call_tool --tool "CLAWLINK_REPORT_ISSUE") instead of retrying. Reports are free and reach the ClawLink team.

Resources

• ClawLink
• ClawLink pricing
• ClawLink docs: OpenClaw
• Verify the plugin

Related Skills

• Price Hawk
• Event Finder

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