# SiteCheck Shop & Social – Facebook Marketplace Search

> SiteCheck Shop & Social – Facebook Marketplace Search is a paid API for AI agents from api.shopsocial-api.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-29).

Returns the first 15–25 logged-out Facebook Marketplace listings for a given city and search query, including price, seller, photos, and status flags.

## Facts

- Endpoint: GET https://api.shopsocial-api.workers.dev/api/social/facebook-marketplace?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sitecheck-shop-social-facebook-marketplace-search-d93c23f3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Izb0JW3Q2QJyP0VVDAI3E

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability sitecheck-shop-social-facebook-marketplace-search-d93c23f3
```

Example prompt: Search Facebook Marketplace in NYC for used road bikes under $500 and show me the first batch of listings with prices, seller names, and links.

## When to prefer this

Use this endpoint when you need quick, structured access to logged-out Facebook Marketplace listings for a specific city without managing a Facebook account, proxies, or browser automation yourself. It is the right choice for price research, local inventory checks, resale arbitrage scouting, or feeding Marketplace data into an agent workflow. Prefer it over generic web-scraping tools when you want pre-parsed fields (price, seller, sold/pending flags) rather than raw HTML, and when the target is specifically Facebook Marketplace rather than other classified platforms like Craigslist or eBay.

## Known failure modes

- City slug not recognised — returns empty results or error if the city identifier doesn't match a Facebook Marketplace location
- No results found — valid city and query but no matching listings at query time
- Proxy block or rate-limit — Facebook may return a CAPTCHA or block response via the residential proxy, causing empty or error results
- Invalid price range — minPrice greater than maxPrice may return unexpected results
- Network timeout — residential proxy latency may occasionally cause timeouts

## How this service works

Pay-per-call e-commerce, product, price and social media data tools for AI agents, from public sources. Payment: x402, USDC on Base, Solana, Arc, Polygon, Arbitrum, Monad, World Chain, Optimism, Avalanche, Celo or Stellar, or RLUSD/XRP on the XRP Ledger. No signup, no API key; a failed call is not charged.

## Output

A list of up to 15–25 Facebook Marketplace listings containing: listing ID, title, price, quantity/amount, city, state, seller name, sold and pending boolean flags, available delivery types, listing creation timestamp, thumbnail photo URL, and a direct link to the listing on Facebook.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "city",
      "query"
     ],
     "properties": {
      "city": {
       "type": "string",
       "description": "Marketplace city slug as in facebook.com/marketplace/<city>, e.g. nyc, la, chicago, london, sydney, or a numeric location id"
      },
      "query": {
       "type": "string",
       "description": "Search words, e.g. bike"
      },
      "maxPrice": {
       "type": "number",
       "description": "Optional maximum price"
      },
      "minPrice": {
       "type": "number",
       "description": "Optional minimum price"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sitecheck-shop-social-facebook-marketplace-search-d93c23f3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.shopsocial-api.workers.dev](https://www.zero.xyz/host/api.shopsocial-api.workers.dev/llms.txt)