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secondhand-mcp

MCP server for searching secondhand marketplaces — Facebook Marketplace, eBay, and Depop. Works with Claude Desktop, Claude Code, and other MCP clients.

→ jlsookiki/secondhand-mcp· listed on github_topic
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// key findings
⚠️
Known vulnerabilities in dependencies: 6 high
Affects packages this MCP installs at runtime. Upgrade or remove the affected dependency.
✅
No credential exfiltration, no sensitive file access, no obfuscation
Static analysis found nothing flowing your secrets to unexpected places.
✅
Open source with a license and README
Anyone can audit the code, the license is declared, and the publisher documents what it does.
🔐
You'll be asked for 1 credential: EBAY_CLIENT_SECRET
These are read from process.env at runtime. Make sure you trust where they’ll be sent.
// known CVEs in dependencies6 high7 low

Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.

high@modelcontextprotocol/sdk@1.5.0GHSA-8r9q-7v3j-jr4g

Anthropic's MCP TypeScript SDK has a ReDoS vulnerability

high@modelcontextprotocol/sdk@1.5.0GHSA-w48q-cv73-mx4w

Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default

highundici@7.21.0GHSA-f269-vfmq-vjvj

Undici: Malicious WebSocket 64-bit length overflows parser and crashes the client

highundici@7.21.0GHSA-v9p9-hfj2-hcw8

Undici has Unhandled Exception in WebSocket Client Due to Invalid server_max_window_bits Validation

highundici@7.21.0GHSA-vrm6-8vpv-qv8q

Undici has Unbounded Memory Consumption in WebSocket permessage-deflate Decompression

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// required environment variables
This server reads these from process.env. You'll be asked to provide them before it can run.
configEBAY_CLIENT_ID— "": "your-ebay-client-id",
🔐 secretEBAY_CLIENT_SECRET— "": "your-ebay-client-secret"
configMARKETPLACES— By default all marketplaces are enabled. To limit which are active, set the env var (comma-separated):
configPUPPETEER_EXECUTABLE_PATH
configSMARTPROXY_URL
// full audit trail
The full breakdown of what we checked, the deductions that landed, the network hosts, the dependency advisories, and concrete fix guidance is available to verified publishers.
// improvement guidance — verified publishers only
We have 2 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.
// embed badge in your README
[![M8ven Score](https://m8ven.ai/badge/mcp/jlsookiki-secondhand-mcp-18oa7y)](https://m8ven.ai/mcp/jlsookiki-secondhand-mcp-18oa7y)
commit: 3c1f80473a84be02bb9c9866232413a1c34c0d6b
code hash: 880f043800c8cf14e4e9709c7d3b49b27dc87fb89aeb2b677a5d44542678b39f
verified: 7/25/2026, 8:41:07 AM
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