[eBay] Negotiation API MCP Server

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        "content": "### ⚙️ Setup Instructions\n\n1. **Import Workflow**: \nLoad this workflow into your n8n instance\n\n2. **Configure Authentication**: \nSet up oauth2 credentials\n\n3. **Activate Workflow**:\nEnable the workflow to start the MCP server\n\n4. **Get MCP URL**: \nCopy the webhook URL from the MCP trigger\n\n5. **Connect AI Agent**:\nUse the MCP URL in your AI agent configuration\n\n\n### 💡 Usage Notes\n• Parameters are auto-populated by AI using $fromAI() expressions\n• With 2 API endpoints available as tools\n• Responses maintain original API structure\n\n\n### 🛠️ Customization\n• Add data transformation nodes if needed\n• Implement custom error handling\n• Add logging or monitoring nodes\n\n• Modify parameter defaults in any HTTP request node as needed\n\n### 💬 Need Help?\nPing me on [discord](https://discord.me/cfomodz) for integration guidance and custom automations. Check the [n8n documentation](https://docs.n8n.io/integrations/builtin/cluster-nodes/sub-nodes/n8n-nodes-langchain.toolmcp/) for more information."
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        "content": "## 🛠️ Negotiation MCP Server ✅ 2 operations\n\n### About\nThe Negotiations API lets sellers send discount offers to buyers who showed interest in their listings (e.g., by watching or carting items). Offers can be percentage-based or fixed-price discounts. See \"Sending offers to buyers\" for implementation details.\n\n### 🔧 How it Works\n\nThis workflow converts the Negotiation API into an MCP-compatible interface for AI agents.\n\n• **MCP Trigger**: Serves as your server endpoint for AI agent requests\n• **HTTP Request Nodes**: Handle API calls to https://api.ebay.com{basePath}\n• **AI Expressions**: Automatically populate parameters via `$fromAI()` placeholders\n• **Native Integration**: Returns responses directly to the AI agent\n\n\n### 📋 Available Operations (2 endpoints)\n\n**Offer (2 operations)**\nFind Eligible Listings, Send Discount Offer\n\n"
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        "content": "## Offer"
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      "name": "Find Eligible Listings",
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        "url": "=https://api.ebay.com{basePath}/find_eligible_items",
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        "authentication": "genericCredentialType",
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              "name": "offset",
              "value": "={{ $fromAI('offset', 'This query parameter specifies the number of results to skip in the result set before returning the first result in the paginated response. Combine offset with the limit query parameter to control the items returned in the response. For example, if you supply an offset of 0 and a limit of 10, the first page of the response contains the first 10 results from the complete list of items retrieved by the call. If offset is 10 and limit is 20, the first page of the response contains items 11-30 from the complete result set. Default: 0', 'string') }}"
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        "toolDescription": "Evaluates a seller's current listings and returns the set of IDs that are eligible for a seller-initiated discount offer to a buyer. A listing ID is returned only when one or more buyers have shown an "interest" in the listing. If any buyers have shown interest in a listing, the seller can initiate a "negotiation" with them by calling sendOfferToInterestedBuyers, which sends all interested buyers a message that offers the listing at a discount. For details about how to create seller offers to buyers, see Sending offers to buyers.\n\nParameters:\n- Query parameters:\n  • limit (optional) - Query parameter specifies the maximum number of items to return from the result set on a page in the paginated response. Minimum: 1    Maximum: 200 Default: 10\n  • offset (optional) - Query parameter specifies the number of results to skip in the result set before returning the first result in the paginated response. Combine offset with the limit query parameter to control the items returned in the response. For example, if you supply an offset of 0 and a limit of 10, the first page of the response contains the first 10 results from the complete list of items retrieved by the call. If offset is 10 and limit is 20, the first page of the response contains items 11-30 from the complete result set. Default: 0\n- Header parameters:\n  • X-EBAY-C-MARKETPLACE-ID (required) - EBay marketplace on which you want to search for eligible listings. For a complete list of supported marketplaces, see Negotiation API requirements and restrictions.",
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        "toolDescription": "Sends eligible buyers offers to purchase items in a listing at a discount. When a buyer has shown interest in a listing, they become "eligible" to receive a seller-initiated offer to purchase the item(s). Sellers use findEligibleItems to get the set of listings that have interested buyers. If a listing has interested buyers, sellers can use this method (sendOfferToInterestedBuyers) to send an offer to the buyers who are interested in the listing. The offer gives buyers the ability to purchase the associated listings at a discounted price. For details about how to create seller offers to buyers, see Sending offers to buyers.\n\nParameters:\n- Header parameters:\n  • X-EBAY-C-MARKETPLACE-ID (required) - EBay marketplace on which your listings with "eligible" buyers appear. For a complete list of supported marketplaces, see Negotiation API requirements and restrictions.",
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