Vantage — Signal Tracker MCP server

Vantage

Track what you're seeing. Use it later.

Vantage is a personal signal store for AI-native work — a place to capture and query the things you notice across the web.

A post on X. A thread on LinkedIn. An insight from an article. A competitor move. Instead of losing it across tabs, screenshots, and notes, you save it — and use it later.

One memory layer across all your AI tools

Your AI tools don't share memory.

• Claude doesn't know what you saw on X
• ChatGPT doesn't know what you read yesterday
• Your code tools don't know your research

Vantage fixes that.

Save signals once, and access them anywhere you have an MCP-compatible client — across Claude, Cursor, and other supported tools.

How it works

1. Connect Vantage to your AI (via MCP)
2. Save signals directly from your workflow
3. Ask questions on top of what you've saved

Example:

"Save this as a signal"

"What have I saved about pricing?"

"Show me signals from Lemkin"

What Vantage is (and isn't)

• Not a scraper — you choose what matters
• Not a feed — no noise or algorithmic clutter
• Not a knowledge base — no system to maintain

Vantage is a simple way to keep track of what you're seeing — so your AI can actually use it later.

Hosted + open source

• Free hosted version: vantage.cavendo.ai
• Self-hosted: MIT licensed, run it anywhere

Quick Start

Option 1: Use the hosted version (fastest)

Sign up at vantage.cavendo.ai. Connect to Claude or another supported client. Start capturing.

Takes about 2 minutes. No install required.

Option 2: Run locally

npm install
npm run dev

# If 3020 is already in use, choose another port
PORT=YOUR_PORT npm run dev

# Generate your first API key
curl -X POST http://localhost:3020/api/auth/keys \
  -H 'Content-Type: application/json' \
  -d '{"name": "my-key"}'

The first API key can be created from localhost without auth. If you're bootstrapping a fresh remote deployment, set VANTAGEBOOTSTRAPTOKEN on the server and send the same value in the X-Vantage-Bootstrap-Token header on that first request. The API key is returned as data.key in the JSON response.

Capture your first signal:

curl -X POST http://localhost:3020/api/signals \
  -H 'Content-Type: application/json' \
  -H 'Authorization: Bearer vtg_YOUR_KEY_HERE' \
  -d '{
    "signalType": "post",
    "platform": "x",
    "content": "Every SaaS company will need an agent layer within 18 months.",
    "topics": ["AI Agents", "SaaS"],
    "importance": "high"
  }'

MCP Server

Vantage includes an MCP server with 13 tools for use with Claude, Claude Code, Cursor, or any MCP-compatible client.

If you want to use the bundled stdio MCP server directly, install its dependencies too:

cd mcp-server
npm install
cd ..

Claude Code

claude mcp add vantage --transport http "http://localhost:3020/mcp" --header "Authorization: Bearer vtg_YOUR_KEY"

For manual testing, note that /mcp is a streamable HTTP endpoint. MCP clients handle the response format automatically, but ad hoc curl calls need to be prepared for stream-oriented responses rather than a simple JSON-only request/response flow.

Claude Desktop

Add to ~/Library/Application Support/Claude/claudedesktopconfig.json:

{
  "mcpServers": {
    "vantage": {
      "command": "node",
      "args": ["/path/to/vantage/mcp-server/src/index.js"],
      "env": {
        "VANTAGE_API_URL": "http://localhost:3020",
        "VANTAGE_API_KEY": "vtg_YOUR_KEY_HERE"
      }
    }
  }
}

MCP Tools

Shortened. The full README is on GitHub.