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Connect Relative & Parallel Key Finder to ChatGPT and Claude

Set it up once and it works in ChatGPT, Claude, Cursor, and any other client you love. It all runs safely in the background, so you can relax and focus on what really matters. Connect your AI agent to the logic of Western music theory.

Ask AI about this Connector

Developed, maintained, and hosted by Vinkius.

MCP VERIFIED · PRODUCTION READY · VINKIUS GUARANTEED

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Works with modern AI clients that support MCP, including ChatGPT, Claude, Cursor, and more.

ChatGPTClaudeCursorPerplexityGeminiMicrosoft CopilotRaycastMeta AI

Your AI does the work. We keep it safe and sound.

No other AI tool gives you this. Your workflow runs in the client you already love, your account stays protected, and you decide what the agent can and cannot do. It is the whole reason to make the switch.

Each Connector lives inside our infrastructure, the same place where your workflow runs. The three things below are already part of it, working quietly in the background so you never have to think about them. Nothing to add, nothing to set up, nothing to worry about.

A futuristic MCP client docking bay
V8 Isolate01

Each Connector runs inside its own sealed environment.

Each Connector runs inside its own sealed V8 runtime — no access to your files, your system, or other servers. A Connector never sees past its own request.

Kill Switch02

One switch stops every agent. Instantly.

One action deactivates every Connector, revokes every token, and ends every session at once. AI Governance keeps the record.

FinOps per User03

Spending limits that pause instead of surprise.

Every user keeps their own connections and credentials, isolated from everyone else. Anything that would cross your spending limit is held for your approval, not billed.

Three controls, built into the layer your AI connects through.

Curated set · 3 capabilities

We ship only the actions that matter.

Capability set01 / 01

01-03

3 capabilities in this set.

Part of 3 available through Relative & Parallel Key Finder.

  1. 01

    Lookup modulation guide

    Accesses a complete reference table of all key signatures to help plan transitions.

  2. 02

    Find key relationships

    Identifies relative, parallel, antiparallel, homonymous, and third-distance keys for any given input.

  3. 03

    Get signature details

    Returns the specific accidental count, mode, and type of sharps or flats for a key.

Real work

What teams actually run

01

Harmonic Transitioning

Ask your agent to find a third-distance key to create a smooth modulation in a song.

02

Theory Verification

Check the accidental count of a complex key to ensure your notation is correct.

03

Creative Exploration

Find parallel keys to experiment with different emotional qualities using the same tonic.

04

Compositional Logic

Use the modulation guide to map out a structural path for a multi-movement work.

One connector, every AI

Relative & Parallel Key Finder works with the most popular AI clients.

These are the most popular clients, each with a step-by-step guide: one link, set up once, with governance and visibility built in. And because everything runs on the MCP standard, the same connection also works in any other compatible client — nothing to rebuild.

ClaudeClaudeChatGPTChatGPTGeminiGeminiPerplexityPerplexityGrokGrokMicrosoft CopilotMicrosoft CopilotCursorCursorVS CodeVS CodeWindsurfWindsurfJetBrainsJetBrainsClineClineLangChainLangChainVercel AI SDKVercel AI SDKLovableLovableZ.aiZ.aiRaycastRaycastQwen CodeQwen CodeKimi CodeKimi CodeLe ChatLe Chat

Building your own app? The connector is yours to use.

You don't need a client to put Relative & Parallel Key Finder to work: the same hosted connection plugs into your own applications and agent code, with the same governance on every request. Build with it, chat with it — one connection for both.

Observed, not estimated

648ms average. Fast in production.

Relative & Parallel Key Finder is checked daily against the live service.

Daily averagePeak 836ms
Oct 3Today
Fastest day
538ms
Slowest day
836ms
14-day trend
Slowing+13%

Connect your client

One URL. Every client.

Activate the Connector, copy your link, and paste it into the client you already use. 3 capabilities arrive ready to run.

Preview access · not provider authentication

The vk_preview_* token belongs to Vinkius preview infrastructure. It lets Claude discover and display the capabilities of Relative & Parallel Key Finder, so you can see the experience inside your AI.

It does not authenticate your account with Relative & Parallel Key Finder. Actions requiring credentials or live account data may not run until you activate the Connector and authorize the service.

Relative & Parallel Key Finder Connector

You're all set. Choose your MCP client and follow the setup instructions.

Connector linkhttps://edge.vinkius.com/vk_preview_LQU1yFkV7soJUwYi1bodEOaHv42XWmMS7JborImv/mcp

Claude Desktop

Follow the steps below to connect in seconds.

  1. 1In Claude Desktop, open Settings → Connectors.
  2. 2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
  3. 3Click Add and start a new chat — Relative & Parallel Key Finder capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "relative-parallel-key-finder-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_LQU1yFkV7soJUwYi1bodEOaHv42XWmMS7JborImv/mcp"
    }
  }
}
  • Claude
  • ChatGPT
  • Cursor
  • VS Code
  • Windsurf
  • Claude Code
  • JetBrains
  • Cline

Step-by-step instructions for each client are in the guide. How to connect

Guided setup for Claude? Set up Relative & Parallel Key Finder in Claude and other AIs

See all the AI clients this connector works with ↑

Who it's for

Built for the work Relative & Parallel Key Finder owners hand off.

This MCP is built for anyone working with musical notation and theory who wants to offload structural calculations to an AI agent.

  • 01

    Composers

    Use the agent to quickly find modulation paths and related keys during the writing process.

  • 02

    Music Students

    Verify key signatures and theory relationships to check homework or study patterns.

  • 03

    Producers

    Hand off the math of key relationships to an agent while focusing on arrangement.

FAQ

Questions Relative & Parallel Key Finder owners ask.

  • 01

    What clients can I use with this MCP?

    You can use it with any MCP-compatible client, including Claude, Cursor, Windsurf, and VS Code.

  • 02

    Do I need to host the MCP myself?

    No, Vinkius hosts and manages the MCP for you. You just connect and use it.

  • 03

    Can it help me with modulation?

    Yes, it includes a modulation guide capability that provides a reference table for planning key changes.

  • 04

    What kind of key relationships does it find?

    It can find relative, parallel, antiparallel, homonymous, and third-distance keys.

  • 05

    Does it work for minor keys too?

    Yes, it provides signature details and relationships for both major and minor keys.

  • 06

    How can I find the relative key of C Major?

    You can use the find_key_relationships capability with 'C Major' as the input. It will return A Minor as the relative key.

  • 07

    What does get_signature_details provide?

    It provides the number of accidentals, whether they are sharps or flats, and identifies if the key is Major or Minor.

  • 08

    Can I use this for modulation planning?

    Yes, the lookup_modulation_guide capability provides a complete reference table of all key signatures to assist in finding suitable keys for modulation.

Explore

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