Open Source

YC Companies MCP Server

Give your AI assistant direct access to Y Combinator company data. Search companies, explore batches, and discover founders—all through natural conversation.

What is MCP?

The Model Context Protocol (MCP) is an open standard that lets AI assistants connect to external data sources and tools. Instead of copy-pasting data or manually searching, you can simply ask your AI to look things up directly.

With the yc-mcp server, Claude gains the ability to search YC companies, list batch participants, and retrieve detailed company information including founder LinkedIn profiles.

Why Use It?

Natural Conversation

Ask "What AI companies were in YC Winter 2026?" and get instant answers without leaving your chat.

Deep Research

Search across 5,000+ companies by industry, tag, or description. Find competitors, potential partners, or investment targets.

Founder Discovery

Get founder names, titles, and LinkedIn URLs. Perfect for networking, recruiting, or due diligence.

Always Current

Data syncs from YC's official sources. New batches and company updates are available automatically.

Available Tools

list_yc_batch

List all companies in a batch (W26, S25, winter-2026, etc.)

search_yc_companies

Search by name, industry, tag, or description

get_yc_company

Get company details including founders and LinkedIn URLs

list_yc_industries / list_yc_tags

Browse available industries and tags with company counts

Quick Start

Claude Desktop

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

{
  "mcpServers": {
    "yc": {
      "command": "npx",
      "args": ["-y", "yc-mcp"]
    }
  }
}

Restart Claude Desktop after saving.

Claude Code

Add to your project's .mcp.json:

{
  "mcpServers": {
    "yc": {
      "command": "npx",
      "args": ["-y", "yc-mcp"]
    }
  }
}

Example Prompts

"List the YC Winter 2026 batch"

"Find AI companies from the latest YC batch"

"Tell me about Stripe—who founded it?"

"What fintech companies has YC funded?"

"Search for companies working on developer tools"

"Which YC companies are hiring?"

View on npm Browse Companies