TrySellr MCP Server
Click on "Install Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type
@followed by the MCP server name and your instructions, e.g., "@TrySellr MCP Serveranalyze this used PS5 and suggest a price for Facebook Marketplace"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
TrySellr MCP Server
AI-powered selling intelligence for Facebook Marketplace, eBay, Mercari, OfferUp, and Craigslist.
TrySellr plugs into any MCP-compatible AI assistant (Claude, ChatGPT, Cursor, etc.) and gives sellers superpowers: instant item analysis, conversion-optimized listings, cross-platform pricing data, negotiation coaching, demand intelligence, and batch processing.
One server. Every AI assistant. Every marketplace.
Tools
Tool | What It Does | Tier |
| Identify items, estimate value, detect brand/model | Free (3/day) |
| Generate high-converting listings with SEO | Free (3/day) |
| Cross-platform pricing with sell-speed estimates | Pro |
| AI negotiation coach with copy-paste replies | Pro |
| Trending items and demand signals by location | Pro |
| Listing health score and optimization plan | Pro |
| Process 2-25 items at once | Power |
| Generate listings for 2-6 platforms simultaneously | Power |
Related MCP server: eBay Seller MCP Server
Pricing
Free: 3 analyze + 3 optimize calls/day. No credit card.
Pro ($19/mo): All analysis, pricing, negotiation, and tracking tools.
Power Seller ($49/mo): Everything + batch processing + cross-listing.
Quick Start
1. Get Your API Key
curl -X POST https://trysellr.com/api/signup \
-H "Content-Type: application/json" \
-d '{"email": "you@example.com"}'2. Connect to Claude Desktop
Add to your Claude Desktop MCP config (claude_desktop_config.json):
{
"mcpServers": {
"trysellr": {
"url": "https://trysellr.com/mcp",
"headers": {
"x-trysellr-key": "tsk_your_api_key_here"
}
}
}
}3. Start Selling Smarter
Open Claude and say:
"Analyze this item: Sony WH-1000XM4 headphones, used, good condition, comes with case"
"Write a Facebook Marketplace listing for a mid-century modern coffee table, walnut, 48x24, great condition"
"What's trending in Electronics in Nashville right now?"
API Endpoint
Base URL: https://trysellr.com/mcp
Transport: Streamable HTTP (MCP spec 2025-03-26)
Auth: Header x-trysellr-key: tsk_your_key
MCP Protocol
# Initialize
curl -X POST https://trysellr.com/mcp \
-H "Content-Type: application/json" \
-H "x-trysellr-key: tsk_your_key" \
-d '{"jsonrpc":"2.0","method":"initialize","params":{},"id":1}'
# List tools
curl -X POST https://trysellr.com/mcp \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"tools/list","params":{},"id":2}'
# Call a tool
curl -X POST https://trysellr.com/mcp \
-H "Content-Type: application/json" \
-H "x-trysellr-key: tsk_your_key" \
-d '{
"jsonrpc":"2.0",
"method":"tools/call",
"params":{
"name":"analyze_item",
"arguments":{"description":"iPhone 14 Pro Max 256GB space black, good condition, no cracks"}
},
"id":3
}'Development
# Install
npm install
# Run locally
cp .env.example .env # Edit with your keys
npm run dev
# Build
npm run build
# Test
npm testDeploy
Railway (Recommended)
railway login
railway init
railway upDocker
docker build -t trysellr-mcp .
docker run -p 8080:8080 --env-file .env trysellr-mcpFly.io
fly launch
fly deployArchitecture
┌─────────────────────────────────────────────┐
│ AI Assistants (Clients) │
│ Claude │ ChatGPT │ Cursor │ Any MCP Client │
└────────────────┬────────────────────────────┘
│ MCP Protocol (JSON-RPC 2.0)
│ POST /mcp
┌────────────────▼────────────────────────────┐
│ TrySellr MCP Server │
│ ┌──────────┐ ┌──────────┐ ┌──────────┐ │
│ │ Auth │ │ Rate │ │ Usage │ │
│ │ Layer │ │ Limiter │ │ Tracker │ │
│ └────┬─────┘ └────┬─────┘ └────┬─────┘ │
│ └─────────┬───┘────────────┘ │
│ ┌──────────────▼──────────────────────┐ │
│ │ Tool Registry (8 tools) │ │
│ │ analyze │ optimize │ price │ batch │ │
│ │ negotiate │ demand │ cross │ track │ │
│ └──────────────┬──────────────────────┘ │
│ ┌──────────────▼──────────────────────┐ │
│ │ Service Layer │ │
│ │ AI Engine │ Pricing │ Database │ │
│ └─────────────────────────────────────┘ │
└─────────────────────────────────────────────┘License
MIT — Built by BOEZAC / TrySellr
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