PairSync MCP server

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What it does

PairSync refits cointegration statistics every night across six markets (US equities, US ETFs, EU, India, Australia, crypto) and serves the output as ranked pair statistics: spread z-scores, locked parameters, calibration records, and backtest-tracked spread states. Your AI can screen pairs, read a pair's locked parameters, freeze a parameter recipe, generate ready-to-paste chart and code templates, check a frozen list against the latest refit output, read the plain-English methodology library, and fetch a strategy-builder scaffold whose every decision is an owner-decision slot your AI fills by asking you.

• Server: https://mcp.pair-sync.com/mcp (remote MCP, Streamable HTTP)
• Tools: 18, all read-only (statistics, templates, methodology library, strategy-builder scaffold, charts)
• Markets / cadence: US, US ETFs, EU, IN, AU, crypto — one refit per market per night
• Rate limit: 300 tool calls/hour per key
• Documentation: https://terminal.pair-sync.com/api

Read-only by design

Every tool is read-only statistics and templates. PairSync has no order path, no custody, no execution, and never manages money — prices, decisions, and execution stay entirely on your side. Anything you choose to freeze or persist is stored on your side; the server keeps nothing.

Get an API key

1. Sign in (or sign up) at https://terminal.pair-sync.com
2. Open Settings → API Access
3. Mint an API key and copy it — you'll paste it into Cursor below

Your credentials stay private: you authenticate with a single PairSync API key minted on your own account page. OAuth tokens are sealed, short-lived envelopes of that key — the server stores no tokens, no sessions, and no personal data.

Connect from Cursor

One-click install (OAuth)

Click the Install in Cursor badge above. Cursor walks you through PairSync's OAuth sign-in — you paste the API key you minted once during authorization, and you're connected.

PairSync's OAuth is standard OAuth 2.1 (RFC 9728 discovery, dynamic client registration, PKCE), so the same zero-config entry works in any OAuth-capable MCP client:

{
  "mcpServers": {
    "pairsync": {
      "url": "https://mcp.pair-sync.com/mcp"
    }
  }
}

Manual mcp.json (API-key header)

Prefer a header instead of OAuth? Add this to ~/.cursor/mcp.json (or your project's .cursor/mcp.json) and set the PAIRSYNC_API_KEY environment variable to your key:

{
  "mcpServers": {
    "pairsync": {
      "url": "https://mcp.pair-sync.com/mcp",
      "headers": {
        "X-Api-Key": "${env:PAIRSYNC_API_KEY}"
      }
    }
  }
}

Example prompts

• Show me tonight's leaders in US equities.
• Screen crypto pairs from the latest refit and explain the top one.
• Explain the PairSync methodology — where do I start?
• Check my frozen recipes against last night's refit output.
• Build me a connector template for this pair with the locked parameters.

What's in this repo

This repository contains only the plugin manifest, MCP configuration, icons, and documentation for the hosted PairSync MCP server — no server source code.

File	Purpose
plugin.json	Agent Plugins (Open Plugins) manifest
mcp.json	Agent Plugins MCP configuration (OAuth)
.mcp.json	Cursor/Claude-style MCP configuration (OAuth)
.cursor-plugin/plugin.json	Cursor Marketplace manifest
icons/	Logo (dark + light, SVG + 512/256/128 PNG)

Disclaimer

PairSync provides educational statistics derived from historical market data. It is not financial advice and makes no performance claims. Nothing here directs trades or executes anything on your behalf.

Support & policies

• Support: support@pair-sync.com
• Privacy policy: https://www.pair-sync.com/privacy
• Website: https://www.pair-sync.com

License

MIT