How to Use the Chord Substitution Finder MCP in Pydantic AI

Q: What guarantees does Chord Substitution Finder provide with Pydantic AI?

It provides type-safety. Every time your agent calls findsubstitutions, the resulting data is validated against a defined model, guaranteeing that the structure of the harmonic information is always correct and predictable.

Q: Can Pydantic AI handle complex progressions using Chord Substitution Finder?

Yes. You can run analyzeprogressiontension on any progression length. The MCP Server handles the raw data flow, but your agent gets a clean, validated object that makes processing reliable.

Q: How do I ensure accurate substitution details with Chord Substitution Finder and Pydantic AI?

You use getsubstitutiondetail. Because this tool's output is strictly typed, you know exactly where to find the theoretical justification or the voice-leading rules without having to write extra parsing logic.

Q: If I want to compare multiple harmonic options, how does Chord Substitution Finder work with Pydantic AI?

First, you run findsubstitutions for a chord. Then, you loop through the results and call getsubstitutiondetail for each one. The runtime validation ensures that every single returned detail object is consistent.

Type-safe harmonic analysis with your Pydantic AI framework.

See Vinkius in Action

Works with every AI agent you already use

…and any MCP-compatible client

MCP Servers - Free for Subscribers

Connect Chord Substitution Finder MCP to Pydantic AI

Create your Vinkius account to connect Chord Substitution Finder to Pydantic AI and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

GDPR Free for Subscribers

Setup Chord Substitution Finder with Pydantic AI

Ask AI about this MCP

ChatGPT

Claude

Perplexity

Validating Tension with the MCP Server

The `analyze_progression_tension` tool returns a structured object detailing tension points in a progression. Because of its nature, your agent receives data that's guaranteed to match expected schemas—no hallucinated fields, period. This strict validation makes it reliable for critical applications where the output structure matters more than anything else.

Finding Substitutions with Pydantic AI

Use `find_substitutions` to get a list of potential chord swaps. The entire response is validated against a defined model, meaning if the API returns malformed data, your agent fails loudly. That's what you want. It ensures that when you process hundreds of chords, every single substitution candidate follows the exact required format.

Detailing Substitutions with Pydantic AI

The `get_substitution_detail` tool provides deep explanations for specific harmonic swaps. Crucially, this output is type-validated immediately upon receipt. You'll always get the necessary fields, like theoretical justification and voice leading rules. Correctness over speed is its whole deal. Pydantic ensures that when you need to write code based on musical theory, the data structure won't betray you.

Setup guide

Set up Chord Substitution Finder MCP in Pydantic AI

Prerequisites

Python 3.10+ installed
pydantic-ai-slim[fastmcp] package
Active Vinkius subscription with a valid endpoint token

1

Install Pydantic AI with FastMCP
Run pip install "pydantic-ai-slim[fastmcp]". The FastMCP toolset replaces the deprecated MCPServerHTTP class with full protocol support.
2

Configure the FastMCPToolset
Pass a JSON-style config dict to FastMCPToolset with your Vinkius URL. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com. Supports Streamable HTTP, SSE, and Stdio transports.
3

Create and run your agent
Pass the toolset to Agent(toolsets=[toolset]) and call agent.run(). Swap openai:gpt-4o for any supported model — Anthropic, Google, Mistral, or Groq.

agent.py

from pydantic_ai import Agent
from pydantic_ai.toolsets.fastmcp import FastMCPToolset

toolset = FastMCPToolset({
    "mcpServers": {
        "chord-substitution-finder-mcp": {
            "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
        }
    }
})

agent = Agent(
    "openai:gpt-4o",
    toolsets=[toolset],
    system_prompt="You have access to Chord Substitution Finder tools.",
)

result = await agent.run("List recent Chord Substitution Finder transactions")
print(result.output)

Get your connection token →

Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Chord Substitution Finder. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

Why Choose Vinkius

Vinkius connects your tools to AI with real-time monitoring and automatic cost savings — all from one dashboard.

Connect Chord Substitution Finder now

Real-time monitoring

Live

visibility into every interaction

Connect your favorite tools to your AI and see exactly what's happening — every request, every response, in real time.

Built-in savings

60%

lower AI costs

Vinkius compresses data between your apps and your AI automatically. Lower bills every month — no configuration required.

Single dashboard

One

place for every integration

Every tool your AI connects to, managed from a single screen. One account, complete control.

Common questions about Chord Substitution Finder MCP in Pydantic AI

It provides type-safety. Every time your agent calls `find_substitutions`, the resulting data is validated against a defined model, guaranteeing that the structure of the harmonic information is always correct and predictable.

Yes. You can run `analyze_progression_tension` on any progression length. The MCP Server handles the raw data flow, but your agent gets a clean, validated object that makes processing reliable.

You use `get_substitution_detail`. Because this tool's output is strictly typed, you know exactly where to find the theoretical justification or the voice-leading rules without having to write extra parsing logic.

The MCP only touches musical theory data (chord names/progressions). Credentials pass through a zero-trust proxy, meaning your keys are used in transit but never stored on the disk.

First, you run `find_substitutions` for a chord. Then, you loop through the results and call `get_substitution_detail` for each one. The runtime validation ensures that every single returned detail object is consistent.

Use it with your favorite AI tools

Connect this server to Cursor, Claude, VS Code, and more.

OpenAI Agents SDK sdk-python

Google ADK sdk-python

Pydantic AI sdk-python

Vercel AI SDK sdk-typescript