Vc Accelerator Portfolio List Builder MCP Server

VC and Accelerator Portfolio List Builder MCP Server

An MCP server for the Mamba Labs VC and Accelerator Portfolio List Builder actor on Apify. Give it investors or accelerators by name, or portfolio page URLs, and get one row per portfolio company with its name, domain, website, description, and stage, batch, or status where the source gives it.

What's Inside

• What it does
• Quick start
• Prerequisites
• Example prompts
• Tool
• Inputs
• Pricing
• Full actor documentation
• License

What it does

Y Combinator is read from its public company directory and can be filtered by batch, industry, region, status, and search words. Andreessen Horowitz (a16z), Sequoia Capital, Accel, Index Ventures, Founders Fund, Greylock, Lightspeed Venture Partners, Khosla Ventures, First Round Capital, Techstars, and Antler are built in, and any other portfolio page works by URL. Each source also returns one free summary row with the count and the way it was read, or the reason it returned nothing. Pages are read from the investor's own site and robots.txt is obeyed.

All of the work runs on Apify. This package is a thin client that starts the actor run, waits for it, and hands back the dataset rows.

Quick start

You need Node.js 18 or newer and an Apify account with an API token.

Add this to your Claude Desktop config (claude_desktop_config.json), Cursor, or any MCP client:

{
  "mcpServers": {
    "mamba-vc-accelerator-portfolio-list-builder": {
      "command": "npx",
      "args": [
        "-y",
        "@mambalabsdev/mcp-vc-accelerator-portfolio-list-builder"
      ],
      "env": {
        "APIFY_TOKEN": "your-apify-token"
      }
    }
  }
}

Restart the client. The build_portfolio_list tool appears.

Prerequisites

• Node.js 18 or newer.
• An Apify API token from console.apify.com/account/integrations, set as APIFY_TOKEN. The server lists its tool without a token; a call needs one.

Example prompts

• "List the Y Combinator W25 companies in fintech with their websites."
• "Which companies are in Accel's and Greylock's portfolios?"
• "Pull the portfolio of https://example.vc/portfolio into a table."

Tool

build_portfolio_list. One tool. Example arguments:

{
  "investors": ["Y Combinator"],
  "yc_batches": ["W25"],
  "max_companies_per_source": "100"
}

Inputs

Every buyer facing input of the actor. Omitted inputs take the actor's own defaults. Numbers and yes or no options are sent as text ("100", "true"), which is what the actor accepts; a value that does not parse comes back as one free row that names the field.

Pricing

Pay per event on Apify, billed to your Apify account. Prices in USD.

Rows with no domain, source summary rows, and already delivered companies are free. Mamba Labs pays the platform costs of the run, Apify proxy traffic included.

Full actor documentation

apify.com/mambalabs/vc-accelerator-portfolio-list-builder

License

MIT. See LICENSE.