Koskamo

GrailHound MCP

GrailHound is a marketplace alert service that provides an MCP server allowing AI assistants to track listings across 50+ marketplaces like eBay and Vinted. The server enables agents to report tracker findings, run live test searches, create and edit trackers, and fine-tune filters using AI checks.

Visit GrailHound

Endpoint and access

OAuth sign-in: the first time you connect, your client opens the vendor's own authorization prompt in a browser.

GrailHound MCP logo, by GrailHoundVendor evidenceStreamable HTTPOAuth sign-inEndpoint checked 2026-11-01Operated by GrailHound
You need:sign-in with a GrailHound account over OAuthRequires a GrailHound accountMCP is available for all plans
MCP endpoint (Streamable HTTP)
https://grailhound.app/mcp
Vendor documentation

What you can do with it

  • Report what a user's trackers found
  • Run a live test search before saving a tracker
  • Create and edit trackers
  • Fine-tune tracker filters

Source and maintenance

Vendor evidenceRegistry 1.0.0
mcp-registry: app.grailhound/marketplace-alerts@1.0.0Project website

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks
1 of 1 (100%)
Average latency
1450 ms
95th percentile latency
1450 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · probe · passed · 1450 ms · metadata changed · refuses unauthenticated initialize (HTTP 401)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.
Claude Code configuration
claude mcp add --transport http grailhound-mcp https://grailhound.app/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).
Codex configuration
codex mcp add grailhound-mcp --url https://grailhound.app/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable grailhound-mcp in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "grailhound-mcp": {
      "url": "https://grailhound.app/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).
Cline configuration
{
  "mcpServers": {
    "grailhound-mcp": {
      "type": "streamableHttp",
      "url": "https://grailhound.app/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start grailhound-mcp and inspect its tools.
VS Code configuration
{
  "servers": {
    "grailhound-mcp": {
      "type": "http",
      "url": "https://grailhound.app/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.
Gemini CLI configuration
gemini mcp add --transport http grailhound-mcp https://grailhound.app/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.
Claude Desktop configuration
{
  "mcpServers": {
    "grailhound-mcp": {
      "url": "https://grailhound.app/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.
Windsurf configuration
{
  "mcpServers": {
    "grailhound-mcp": {
      "serverUrl": "https://grailhound.app/mcp"
    }
  }
}

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Do you run GrailHound MCP?

Prove ownership with a DNS record, a well-known file, or your Official MCP Registry entry, and your edits publish immediately. Proofs are re-checked weekly; admins can still hide or remove a listing.

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