Assay

Overview

Assay is a Model Context Protocol (MCP) server: x402 service-quality oracle: check a service's paid-probe quality tier and score before paying it. As an MCP server it plugs straight into AI assistants, exposing its functionality as tools the model can invoke on your behalf.

It runs locally: the npm package assay-oracle-mcp speaks MCP over stdio on your machine. The current release is v0.2.0, published under the MIT license, with source at JasonCZMeng/assay on GitHub.

You'll find Assay in the Development category here on mcp.site; it connects to Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, Zed, and any other MCP client — see the install snippets below. If you maintain Assay for JasonCZMeng, claim this listing to verify ownership, earn the Verified badge, and keep the details current.

Installation

// claude_desktop_config.json
{
  "mcpServers": {
    "assay": {
      "command": "npx",
      "args": [
        "-y",
        "assay-oracle-mcp"
      ]
    }
  }
}