eBay Negotiation API MCP Server for AI Agents

This n8n workflow transforms the eBay Negotiation API into a fully functional MCP (Model Context Protocol) server, exposing two key operations: Find_Eligible_Items (GET /find_eligible_items) to identify suitable listings and Send_Offer_To_Interested_Buyers (POST /send_offer_to_interested_buyers) to dispatch discount offers. Designed specifically for AI agents, it uses a webhook-based MCP trigger to receive requests, processes them via HTTP requests to eBay's API, and returns native responses with full data structures.

The workflow handles parameter population automatically through AI expressions like $fromAI(), covering path/query parameters, request bodies, headers, and authentication. Built-in error management ensures robust operation. Quick setup involves importing the workflow, adding Negotiation API credentials, activating it, copying the webhook URL, and connecting to AI tools like Claude Desktop or Cursor.

Benefits include time-saving automation for eBay sellers, enabling AI-driven negotiation strategies without custom coding. Use cases span e-commerce optimization, such as dynamically offering discounts to boost sales, integrating with AI workflows for intelligent pricing, or scaling offers across listings—ideal for high-volume sellers seeking competitive edges in dynamic markets.