SecondhandSAFE
MCP server for searching secondhand marketplaces — Facebook Marketplace, eBay, and Depop. Works with Claude Desktop, Claude Code, and other MCP clients.
Overview
From the repository's own README, as read at the audited commit. Badges and raw HTML are left out.
[](https://mseep.ai/app/jlsookiki-secondhand-mcp) [](https://mseep.ai/app/3c5664f0-af0e-47f3-8027-de49f25cad5c)
A Model Context Protocol (MCP) server that lets AI assistants search secondhand marketplaces. Search Facebook Marketplace, eBay, Depop, and Poshmark for used and secondhand items — filter by price, category, condition, size, and color, then get full listing details with photos, descriptions, and seller info.
Works with Claude Desktop, Claude Code, Cursor, and other clients that run MCP servers locally.
[!TIP] Using ChatGPT? This one won't work there. It runs on your computer, so it only works where your computer is — Claude Desktop, Claude Code, Cursor. Secondhand MCP Cloud is the same search, always on, so whichever assistant you actually use can reach it. Free tier, no card.
Supported Marketplaces
Setup
Claude Desktop
Add to ~/Library/Application Support/Claude/claude_desktop_config.json:
{
"mcpServers": {
"secondhand": {
"command": "npx",
"args": ["-y", "secondhand-mcp"],
"env": {
"EBAY_CLIENT_ID": "your-ebay-client-id",
"EBAY_CLIENT_SECRET": "your-ebay-client-secret",
"EBAY_MARKE178034e40c5dOBSERVED · 2026-10-08Connect
Built from this server's own package name, version and transport as found in its source — not copied from anyone's documentation, so it cannot drift against a page we do not control. Replace the environment placeholders with a token scoped to the least it needs.
claude mcp add secondhand-mcp --env EBAY_CLIENT_ID=${EBAY_CLIENT_ID} --env EBAY_CLIENT_SECRET=${EBAY_CLIENT_SECRET} -- npx -y [email protected]Exposed tools (5)
5 read · 0 write · 0 destructive.
| Tool | Risk | Description |
|---|---|---|
fetch | read | Fetch one listing in full for an id returned by the search tool, following the ChatGPT deep research tool contract. Id format: marketplace:listingId (for example |
get_listing_details | read | Get one listing in full using an id from search_marketplace or from a marketplace URL: description, every photo, location, seller and shipping options. Photos: by default (imageMode: |
list_marketplaces | read | List the marketplaces this server can search right now, with each one\ |
search | read | Search every available secondhand marketplace at once with a single query string, following the ChatGPT deep research tool contract. Returns results whose ids (marketplace:listingId) can be passed to the fetch tool. Behavior: read-only; Facebook results use the server\ |
search_marketplace | read | Search live listings on secondhand marketplaces by keyword. Marketplaces: ${listMarketplaceNames().join( |
Trust audit
SAFEgrade B · trust 89/100 Nothing in the source contradicts what it says it does. Grade A is reserved for packages that have also passed the behavioural sandbox.
| Layer | What it checks | Result |
|---|---|---|
| L0 | Provenance & inventory | PASS |
| L1 | Static analysis of the code | PASS |
| L2 | Instruction surface (what it tells the agent) | PASS |
| L3 | Class-specific surface | PASS |
| L4 | Behavioural (sandbox) | SKIPPED |
What the source does
- Filesystem
- declared (5 observation(s))
- Network
- declared (5 observation(s))
- Shell
- none-observed
- Dependencies
- not all pinned
- Secrets in source
- none-found
Findings (6)
import { SearchParams } from '../../types.js';import { SearchParams, SearchResult, Listing, ListingDetails } from '../../types.js';import { Listing, ListingDetails } from '../../types.js';import { ListingDetails, ListingPart } from '../../types.js';import { Listing, SearchParams, SearchResult, ListingDetails, LocationCoordinates } from '../../types.js';@modelcontextprotocol/sdk, all-the-cities, html-to-text, puppeteer-core, puppeteer-extra, puppeteer-extra-plugin-stealth, undici, @types/html-to-text
Gates applied: no_behavioural_pass.
178034e40c5dfull audit observations/trust-audit/mcp-server/jlsookiki__secondhand.json · Report an issue / request a re-scanAudit history
Every audit this server has had. A grade with a past is a grade somebody is still checking.
| Date | Source | Verdict | Grade | Score | Change |
|---|---|---|---|---|---|
| 2026-10-08 | 178034e40c5d | SAFE | B | 89 | first audit |
Questions
What is the Secondhand MCP server?
MCP server for searching secondhand marketplaces — Facebook Marketplace, eBay, and Depop. Works with Claude Desktop, Claude Code, and other MCP clients.
What tools does Secondhand expose?
5 in total: 5 read-only, 0 that write, and 0 that can delete or overwrite. Every one is listed on this page with its risk.
Is Secondhand safe to connect to an agent?
The audit found nothing in the source that contradicts what it says it does, and graded it B (89/100). Grade A is held back for packages that have also passed a sandboxed behavioural run, which is why a clean server reads B.
What credentials does Secondhand need?
It reads EBAY_CLIENT_ID and EBAY_CLIENT_SECRET from the environment. Give it a token scoped to the least it needs — an agent that can be talked into calling a tool can be talked into calling it with your credentials.
How does Secondhand run?
It speaks stdio, so it runs as a local process your client starts. It is published on npm as secondhand-mcp at 0.7.1.
How current is this page?
The grade is for one exact copy of the source (178034e40c5d), read on 2026-10-08. The repository is watched and re-audited when it changes.