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Real eBay sold comps for any product keyword — median, range, up to 240 rows per call.
npx @getmcp/cli add solutions.grail/grailRequires Node.js 18+. Community-contributed server. Review source before installing.
AuthorizationBearer <your Grail API key>. Get a free key at https://grail.solutions/signup
Config file: ~/Library/Application Support/Claude/claude_desktop_config.json
{
"mcpServers": {
"solutions.grail/grail": {
"url": "https://grail.solutions/mcp",
"transport": "streamable-http",
"headers": {
"Authorization": ""
}
}
}
}