How do I find my Harmonic API Key?

Log in to your Harmonic account, go to the **Console**, and navigate to the **API** section. You will be able to generate and copy your unique apikey from there.

What happens if a company is not found in the database?

If a company is not found, Harmonic will return a `201 Enrichment Triggered` status. This means a background update has been queued. You can check the status later using the `get_enrichment_status` tool.

Can I search for companies based on specific criteria?

Yes! Use the `search_startups` tool. You can provide a JSON string with filters like headcount, location, or industry to find companies that match your investment or sales criteria.

Is the integration secure?

Absolutely. The integration only accesses your data through your unique API key. Your credentials are encrypted and stored securely within the Vinkius Cloud infrastructure.

Harmonic MCP Server for Pydantic AI 11 tools — connect in under 2 minutes

Name: Harmonic
Availability: InStock
Author: Vinkius

ai.pydantic.dev/mcp

Built by Vinkius GDPR 11 Tools SDK

Pydantic AI brings type-safe agent development to Python with first-class MCP support. Connect Harmonic through Vinkius and every tool is automatically validated against Pydantic schemas. catch errors at build time, not in production.

Get MCP Server for AI Agents

ASK AI ABOUT THIS MCP SERVER

Open in ChatGPT Open in Claude Open in Perplexity

Vinkius supports streamable HTTP and SSE.

python

import asyncio
from pydantic_ai import Agent
from pydantic_ai.mcp import MCPServerHTTP

async def main():
    # Your Vinkius token. get it at cloud.vinkius.com
    server = MCPServerHTTP(url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp")

    agent = Agent(
        model="openai:gpt-4o",
        mcp_servers=[server],
        system_prompt=(
            "You are an assistant with access to Harmonic "
            "(11 tools)."
        ),
    )

    result = await agent.run(
        "What tools are available in Harmonic?"
    )
    print(result.data)

asyncio.run(main())

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Stream every event to Splunk, Datadog, or your own webhook in real-time

* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure

About Harmonic MCP Server

Connect your Harmonic.ai account to any AI agent and take full control of your startup discovery and investment research through natural conversation.

Pydantic AI validates every Harmonic tool response against typed schemas, catching data inconsistencies at build time. Connect 11 tools through Vinkius and switch between OpenAI, Anthropic, or Gemini without changing your integration code. full type safety, structured output guarantees, and dependency injection for testable agents.

What you can do

Company Enrichment — Instantly retrieve firmographics, funding history, and social traction signals for any domain.
Person Insights — Enrich professional profiles using LinkedIn URLs to get education and career history.
Startup Discovery — Search through over 35 million companies using advanced filters like headcount growth and industry.
Investor Research — Find investment firms and angels, and inspect their full portfolio history.
Funding Monitoring — List and retrieve details for funding rounds, including amounts and lead investors.
Enrichment Status — Track background data refresh requests to ensure you have the most up-to-date information.

The Harmonic MCP Server exposes 11 tools through the Vinkius. Connect it to Pydantic AI in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.

How to Connect Harmonic to Pydantic AI via MCP

Follow these steps to integrate the Harmonic MCP Server with Pydantic AI.

Install Pydantic AI

Run pip install pydantic-ai

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token

Run the agent

Save to agent.py and run: python agent.py

Explore tools

The agent discovers 11 tools from Harmonic with type-safe schemas

Why Use Pydantic AI with the Harmonic MCP Server

Pydantic AI provides unique advantages when paired with Harmonic through the Model Context Protocol.

Full type safety: every MCP tool response is validated against Pydantic models, catching data inconsistencies before they reach your application

Model-agnostic architecture. switch between OpenAI, Anthropic, or Gemini without changing your Harmonic integration code

Structured output guarantee: Pydantic AI ensures tool results conform to defined schemas, eliminating runtime type errors

Dependency injection system cleanly separates your Harmonic connection logic from agent behavior for testable, maintainable code

Harmonic + Pydantic AI Use Cases

Practical scenarios where Pydantic AI combined with the Harmonic MCP Server delivers measurable value.

Type-safe data pipelines: query Harmonic with guaranteed response schemas, feeding validated data into downstream processing

API orchestration: chain multiple Harmonic tool calls with Pydantic validation at each step to ensure data integrity end-to-end

Production monitoring: build validated alert agents that query Harmonic and output structured, schema-compliant notifications

Testing and QA: use Pydantic AI's dependency injection to mock Harmonic responses and write comprehensive agent tests

Harmonic MCP Tools for Pydantic AI (11)

These 11 tools become available when you connect Harmonic to Pydantic AI via MCP:

enrich_company

Enrich a company with firmographics, funding, and social signals

enrich_person

Enrich a person with professional history and social signals

get_api_profile

Get information about the current API user

get_company_stats

Get growth and headcount statistics for a company

get_enrichment_status

Check the status of a background enrichment request

get_investor_portfolio

Get the list of portfolio companies for an investor

list_company_news

List recent news and press releases for a company

list_funding_rounds

List funding rounds for a specific company

list_traction_signals

List social and web traction signals for a company

search_investors

Search for investment firms and angels

search_startups

Search for startups using filters like industry, location, and headcount

Example Prompts for Harmonic in Pydantic AI

Ready-to-use prompts you can give your Pydantic AI agent to start working with Harmonic immediately.

"Enrich the domain 'openai.com' and show funding rounds."

"Search for startups in 'Artificial Intelligence' with 50-200 employees."

"Show me the portfolio companies for 'Sequoia Capital'."

Troubleshooting Harmonic MCP Server with Pydantic AI

Common issues when connecting Harmonic to Pydantic AI through the Vinkius, and how to resolve them.

MCPServerHTTP not found

Update: pip install --upgrade pydantic-ai

Harmonic + Pydantic AI FAQ

Common questions about integrating Harmonic MCP Server with Pydantic AI.

How does Pydantic AI discover MCP tools?

Create an MCPServerHTTP instance with the server URL. Pydantic AI connects, discovers all tools, and generates typed Python interfaces automatically.

Does Pydantic AI validate MCP tool responses?

Yes. When you define result types as Pydantic models, every tool response is validated against the schema. Invalid data raises a clear error instead of silently corrupting your pipeline.

Can I switch LLM providers without changing MCP code?

Absolutely. Pydantic AI abstracts the model layer. your Harmonic MCP integration works identically with OpenAI, Anthropic, Google, or any supported provider.