Capsolver MCP

Name: Capsolver MCP
Author: capsolver-ai

by capsolver-aiversion 0.1.3i★ –iRuns on your computer

Registry nameio.github.capsolver-ai/capsolver-mcp

Install

Overview

Description from the maker (original English)

MCP Server for CapSolver - captcha-solving capabilities for AI agents

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Other
You need to fill in: CAPSOLVER_API_KEY

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: CAPSOLVER_API_KEY

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

PyPIPython’s uv installed (for the uvx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "capsolver": {
      "command": "uvx",
      "args": [
        "capsolver-mcp"
      ],
      "env": {
        "CAPSOLVER_API_KEY": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add capsolver --env CAPSOLVER_API_KEY=your-value -- uvx capsolver-mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "capsolver": {
      "command": "uvx",
      "args": [
        "capsolver-mcp"
      ],
      "env": {
        "CAPSOLVER_API_KEY": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "capsolver": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "capsolver-mcp"
      ],
      "env": {
        "CAPSOLVER_API_KEY": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

CAPSOLVER_API_KEY secret required env
Your CapSolver API key

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 6, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account capsolver-ai, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Otheri

More stars than 0% of the other 32417 servers in this category
Published to the registry more recently than 45% of the other 32417 servers in this category
Basic checks equal to or better than 100% of the other 32417 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Capsolver MCP safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: CAPSOLVER_API_KEY

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.1.3) reached the registry 2 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Python (uv) on your computer.

What can I use instead?

In the same category: Spec Driven Development, Remote Desktop Commander, FOGA node

Alternatives

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

capsolver-mcp

MCP Server for CapSolver — expose captcha-solving capabilities to AI agents via the Model Context Protocol.

Published on PyPI as capsolver-mcp and listed in the official MCP Registry as io.github.capsolver-ai/capsolver-mcp.

See the capsolver-ai-hub repo for integration examples and the full documentation.

For detailed MCP client setup (Claude Desktop, Claude Code, Cursor, Windsurf, Cline, and more), see docs/mcp-integration.md.

Install

pip install capsolver-mcp

pip install capsolver-mcp[browser] # with Playwright support (for detect/solve_on_page)

All tools read the API key from the environment:

# bash / zsh

export CAPSOLVER_API_KEY="your-capsolver-api-key"

PowerShell

$env:CAPSOLVER_API_KEY = "your-capsolver-api-key"

cmd

set CAPSOLVER_API_KEY=your-capsolver-api-key

Usage

CLI

# stdio (default — for local MCP clients like Claude Desktop)

capsolver-mcp

SSE (for remote / HTTP access)

capsolver-mcp --transport sse --host 0.0.0.0 --port 8000

Streamable HTTP (MCP 2025-03-26 spec)

capsolver-mcp --transport streamable-http --host 0.0.0.0 --port 8000

CLI options

capsolver-mcp [OPTIONS]

--transport {stdio,sse,streamable-http} Transport protocol (default: stdio) --host HOST Bind host for SSE/HTTP transports (default: 127.0.0.1) --port PORT Bind port for SSE/HTTP transports (default: 8000) --api-key KEY API key (fallback: CAPSOLVER_API_KEY env) --name NAME Server name (default: capsolver)

Programmatic

from capsolver_mcp.server import create_server

server = create_server( api_key="your-key", # or set CAPSOLVER_API_KEY env var server_name="capsolver", # name advertised to MCP clients host="127.0.0.1", # bind host for SSE / HTTP transports port=8000, # bind port for SSE / HTTP transports ) server.run(transport="sse") # or "stdio" or "streamable-http"

Note: host and port are constructor parameters on create_server()

(forwarded to FastMCP), matching the MCP Python SDK 1.x API.

Configure in Claude Desktop

Add to your claude_desktop_config.json:

"mcpServers": { "capsolver": { "command": "capsolver-mcp", "env": { "CAPSOLVER_API_KEY": "your-key" } } } }

To run without installing it globally, use "command": "uvx" with "args": ["capsolver-mcp"] — this is what MCP clients generate from the registry entry. See docs/mcp-integration.md for per-client examples.

Available tools

Tool	Browser?	Description
`solve_captcha`	No	Solve a captcha by type + site params (token mode)
`detect_captchas`	Yes	Scan a page URL and list present captcha types
`solve_on_page`	Yes	Detect + solve + autofill all captchas on a page
`get_balance`	No	Check account balance and packages
`get_supported_captchas`	No	List all supported captcha types and handlers

Browser-based tools (detect_captchas, solve_on_page) require the browser extra:

pip install capsolver-mcp[browser]

playwright install chromium

Development

git clone https://github.com/capsolver-ai/capsolver-mcp.git

cd capsolver-mcp uv sync --all-extras # or: pip install -r requirements-dev.txt uv run pytest # run tests uv run ruff check src tests # lint

License

MIT

Capsolver MCP

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

FOGA node

README from the maker

capsolver-mcp

Install

PowerShell

cmd

Usage

CLI

SSE (for remote / HTTP access)

Streamable HTTP (MCP 2025-03-26 spec)

CLI options

Programmatic

Configure in Claude Desktop

Available tools

Development

License