mcp-vc-accelerator-portfolio-list-builder

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.

Input	Type	Required	Description
investors	array	no	Built in names or portfolio page URLs, up to 25. Default Y Combinator.
yc_batches	array	no	Y Combinator batches, for example S24, W25.
yc_industries	array	no	Y Combinator industries.
yc_regions	array	no	Y Combinator regions.
yc_status	array	no	active, acquired, public, inactive.
yc_query	string	no	Words to search the Y Combinator directory for.
max_companies_per_source	integer	no	Company rows per source. Default 500.
open_company_pages	boolean	no	Open per company pages when needed. Default true.
max_detail_pages	integer	no	Company pages opened per source. Default 200.
only_new	boolean	no	Skip companies an earlier run returned. Default false.
state_key	string	no	Name for the only new companies memory.
max_charge_usd	string	no	Optional cost cap for the run.
proxy_mode	string	no	auto or direct. Default auto.

Pricing

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

Event	Free plan	Bronze	Silver	Gold
company-row, per portfolio company with a domain	$0.007	$0.00665	$0.0063	$0.00595
apify-actor-start, per run start	$0.0025	$0.0025	$0.0025	$0.0025

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.