Yes, Thunderbit is free to use.

How do I install Thunderbit?

Thunderbit is a local plugin. Install it using npm package: @thunderbit/mcp-server and add the generated configuration snippet to your AI app's MCP config file. Then restart your AI app.

What credentials does Thunderbit need?

Thunderbit requires the following credentials or environment variables: THUNDERBIT_API_KEY. You can find setup instructions on the server detail page.

What AI apps work with Thunderbit?

Thunderbit uses the Model Context Protocol (MCP) and works with any MCP-compatible AI app, including Claude, ChatGPT / Codex, Gemini, Copilot, Cursor, and more.

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Thunderbit MCP Server

by Thunderbit Open

Developer ToolsUse Caution4.8MCP RegistryLocal

Free

Server data from the Official MCP Registry

AI-powered web scraping MCP. Distill pages to Markdown or extract structured data via JSON Schema.

About

AI-powered web scraping MCP. Distill pages to Markdown or extract structured data via JSON Schema.

Security Report

4.8

Use Caution4.8High Risk

The Thunderbit MCP server is a well-structured toolkit for web scraping and data extraction. It properly requires API key authentication for all operations, handles credentials via environment variables, and uses zod for input validation. The code quality is good with appropriate error handling. No evidence of malicious patterns, data exfiltration, or dangerous operations. Minor code quality observations around broad error catches do not materially impact security. Permissions (network_http, env_vars) align well with the server's purpose as a web scraping/extraction tool. Supply chain analysis found 2 known vulnerabilities in dependencies (0 critical, 2 high severity). Package verification found 1 issue (1 critical, 0 high severity).

8 files analyzed · 7 issues found

Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.

Permissions Required

This plugin requests these system permissions. Most are normal for its category.

HTTP Network Access

Connects to external APIs or services over the internet.

env_vars

Check that this permission is expected for this type of plugin.

File System Read

Reads files on your machine. Normal for tools that analyze or process local data.

File System Write

Writes or modifies files on your machine. Check that this is expected for the tool.

Unverified package source

We couldn't verify that the installable package matches the reviewed source code. Proceed with caution.

What You'll Need

Set these up before or after installing:

Your Thunderbit API key (tb_...). Get one at https://app.thunderbit.com/consoleRequired

Environment variable: THUNDERBIT_API_KEY

How to Install

Add this to your MCP configuration file:

{
  "mcpServers": {
    "io-github-thunderbit-open-thunderbit-mcp-server": {
      "env": {
        "THUNDERBIT_API_KEY": "your-thunderbit-api-key-here"
      },
      "args": [
        "-y",
        "@thunderbit/thunderbit-cli"
      ],
      "command": "npx"
    }
  }
}

Documentation

View on GitHub

From the project's GitHub README.

Thunderbit MCP Server

Open-source toolkit for the Thunderbit Open API — CLI, MCP server, and Claude Code plugin.

This monorepo ships three packages, all backed by the Thunderbit Open API:

Package	Purpose	Audience
`@thunderbit/thunderbit-cli`	Command-line tool for distill / extract / batch	Developers, scripts, CI
`@thunderbit/mcp-server`	Model Context Protocol server (7 tools)	AI assistants — Claude Desktop, Cursor, Cline, Claude Code
`thunderbit` Claude Code plugin	Bundled MCP + 4 skills	Claude Code users

Get a free API key at app.thunderbit.com/console/api-keys.

Quick Start

CLI

npm i -g @thunderbit/thunderbit-cli
export THUNDERBIT_API_KEY=tb_your_api_key_here
thunderbit distill https://example.com -f markdown

MCP Server (Claude Desktop / Cursor / Cline)

Edit your MCP client config:

{
  "mcpServers": {
    "thunderbit": {
      "command": "npx",
      "args": ["-y", "@thunderbit/mcp-server"],
      "env": { "THUNDERBIT_API_KEY": "tb_your_api_key_here" }
    }
  }
}

Claude Code Plugin

claude plugin marketplace add thunderbit-com/thunderbit-mcp-server
claude plugin add thunderbit
export THUNDERBIT_API_KEY=tb_your_api_key_here

What you can do

Convert any web page into clean, LLM-ready Markdown
Extract structured data from pages using JSON Schema
Get AI-suggested fields when you don't know what's on a page
Run batch jobs on up to 100 URLs at a time

Pricing

Distill — 1 credit. Extract — 20 credits. Suggest fields — free. Batch jobs scale per URL. Status polling is free.

Top up at app.thunderbit.com/console/billing.

Development

git clone https://github.com/thunderbit-com/thunderbit-mcp-server.git
cd thunderbit-mcp-server
# each package is independent
cd packages/mcp-server && npm install
cd packages/cli && npm install

API Reference

The full HTTP contract is documented in openapi.yaml (OpenAPI 3.1) — base URL https://openapi.thunderbit.com, Bearer auth with your THUNDERBIT_API_KEY.

License

MIT © Thunderbit

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Thunderbit MCP Server

About

Security Report

Findings (7)Action required

Permissions Required

What You'll Need

How to Install

Documentation

Thunderbit MCP Server

Quick Start

CLI

MCP Server (Claude Desktop / Cursor / Cline)

Claude Code Plugin

What you can do

Pricing

Development

API Reference

License

Reviews

No reviews yet

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