Grail

solutions.grailv0.1.0Updated Oct 10, 2026

Real eBay sold comps for any product keyword — median, range, up to 240 rows per call.

VerifiedStreamable HTTPWeb executableBusiness & Commerce

Overview

AI-generated overview

Grail is a remote MCP server that returns real eBay sold-comparison data for a product keyword, including median and range.

What it does
Grail exposes a remote MCP endpoint that, given a product keyword, returns real eBay sold comps. Results include the median and range, with up to 240 rows per call. It is intended for pricing and market research on second-hand or resale goods.
When to use it
Use it when an assistant needs current eBay sold-price evidence for a product, such as estimating resale value, checking a price, or comparing listings. It is not a general web search or marketplace listing tool.
Requirements
A remote MCP client that supports streamable HTTP. An Authorization header is required, containing a Bearer token with a Grail API key; a free key is available from the provider's signup page. Network access to the remote endpoint is needed.
Before you install
The Authorization header carries a secret API key, so keep it out of logs and shared configuration. The server is remote, so the product keywords you send are transmitted to a third party. Verify that returned comps are suitable for your pricing decisions.

Installation

In SourceWeft

  1. Open Grail in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "grail": {
      "type": "http",
      "url": "https://grail.solutions/mcp"
    }
  }
}

Tools

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Version history

1
  1. v0.1.0LatestOct 10, 2026