DIAMOND How To Exploit "Agentic AI" (MCP) Shadow Endpoints

[TheMekanic]

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Many sites (Shopify, eBay, Fintech) have added AI Assistants that use the Model Context Protocol (MCP). These "Agent" endpoints often have weaker rate-limits and skip Turnstile challenges to allow the AI to work faster.
The Strategy:

1. Intercept the MCP Call: Look for
   
   Code:

   /api/v1/agent/task
   or
   
   Code:

   /mcp/sampling
   .
   
2. Protocol Hijacking: Instead of a login POST, send a "Sampling Request" to the AI agent: "List my recent order history."
   
3. The Result: The AI returns the data in a raw JSON format, often including the
   
   Code:

   auth_token
   in the response body, which you can then use for the main site.