Koskamo

CompsAPI MCP

A hosted MCP server provided by CompsAPI that allows AI agents to query real eBay sold listings data. It provides price statistics, including median and mean prices from accepted best offers, and lists the newest sales for specific items. The server supports filtering by query, time window, condition, and best offer status, enabling agents to perform market research and valuation tasks directly.

Endpoint and access

API key: create a key with the vendor first; your client sends it as an authorization header on every request.

CompsAPI MCP logo, by CompsAPIVendor evidenceStreamable HTTPAPI keyEndpoint checked 2026-10-26Operated by CompsAPI
You need:Send your key in the X-API-Key header.Get a key, rotate it, and watch your usage in the console .The free plan is 100 requests a month, no card.
MCP endpoint (Streamable HTTP)
https://api.compsapi.com/mcp
Vendor documentation

What you can do with it

  • Retrieve price statistics for specific trading cards
  • Find the newest sold listings for a product query
  • Analyze market value using accepted best offer prices
  • Check sales history for items across multiple eBay marketplaces

Source and maintenance

Vendor evidenceRegistry 1.0.1
mcp-registry: com.compsapi/ebay-sold-listings@1.0.1Source repositoryProject website
Repository status
Unavailable (HTTP 404)
Maintenance checked

Tools

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

No tool definitions available.

Maintenance history

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

  • · repository · passed · metadata changed · unavailable
  • · repository · failed · Repository maintenance failed
  • · registry · passed · metadata changed · Source metadata updated
  • · registry · passed · metadata changed · Source metadata updated
  • · backfill · recorded · Pre-expansion baseline; unobserved rich metadata remains unknown

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 compsapi-mcp https://api.compsapi.com/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 compsapi-mcp --url https://api.compsapi.com/mcp

Cursor

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

Cline

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

VS Code

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

Let your agent find its tools

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