# CapSolver

```json
{
  "name": "CapSolver",
  "slug": "capsolver",
  "url": "https://composio.dev/toolkits/capsolver",
  "markdown_url": "https://composio.dev/toolkits/capsolver.md",
  "logo_url": "https://logos.composio.dev/api/capsolver",
  "categories": [
    "developer tools & devops"
  ],
  "is_composio_managed": false,
  "updated_at": "2026-10-21T05:31:21.185Z"
}
```

![CapSolver logo](https://logos.composio.dev/api/capsolver)

## Description

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with CapSolver MCP or direct API to create CAPTCHA tasks, poll for solutions, check account balances, and submit solution feedback through natural language.

## Summary

CapSolver is a CAPTCHA-solving service with APIs for recognition and token workflows.
It helps developers automate CAPTCHA challenges with fast, programmable task handling.

## Categories

- developer tools & devops

## Toolkit Details

- Tools: 16

## Images

- Logo: https://logos.composio.dev/api/capsolver

## Authentication

- **Api Key**
  - Type: `api_key`
  - Description: Api Key authentication for CapSolver.
  - Setup:
    - Configure Api Key credentials for CapSolver.
    - Use the credentials when creating an auth config in Composio.

## Suggested Prompts

- Create and poll a CAPTCHA solving task
- Check your CapSolver account balance
- Submit feedback for an incorrect solution

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `CAPSOLVER_CLASSIFY_AWS_WAF` | Classify AWS WAF Image | Classify one AWS WAF challenge image or a nine-image grid and return the immediate geometric or object result. This is a paid CapSolver operation. |
| `CAPSOLVER_CLASSIFY_RECAPTCHA_V2` | Classify reCAPTCHA V2 Image | Classify a reCAPTCHA v2 challenge image for a documented object category and return the immediate selection result. This is a paid CapSolver operation. |
| `CAPSOLVER_GET_BALANCE` | Get Balance | Return the connected CapSolver account balance and non-secret package metadata. Package access tokens are never returned. |
| `CAPSOLVER_GET_TASK_RESULT` | Get Task Result | Get one asynchronous CapSolver task result, or optionally poll it every three seconds for a bounded time. This action never creates or retries a task. |
| `CAPSOLVER_RUN_VISION_ENGINE` | Run Vision Engine | Run one documented CapSolver vision module and return its immediate points, distance, angle, rectangles, or text result. This is a paid operation. |
| `CAPSOLVER_SOLVE_AWS_WAF` | Solve AWS WAF | Create one AWS WAF token task with or without a caller-supplied proxy and optionally poll every three seconds for a bounded time. Returns the task ID when processing continues. This is a paid CapSolver operation. |
| `CAPSOLVER_SOLVE_BOTDEFLECTOR` | Solve BotDeflector | Create exactly one proxyless BotDeflector task from a target flow token and optionally poll every three seconds for a bounded time. Returns the task ID when processing continues. This is a paid CapSolver operation. |
| `CAPSOLVER_SOLVE_CLOUDFLARE_CHALLENGE` | Solve Cloudflare Challenge | Create one Cloudflare challenge task through a sticky caller-supplied proxy and optionally poll every three seconds for bounded clearance output. This is a paid CapSolver operation. |
| `CAPSOLVER_SOLVE_CLOUDFLARE_TURNSTILE` | Solve Cloudflare Turnstile | Create one proxyless Cloudflare Turnstile task and optionally poll every three seconds for a bounded time. Returns the task ID for continuation. This is a paid CapSolver operation. |
| `CAPSOLVER_SOLVE_DATADOME` | Solve DataDome | Create exactly one DataDome slider task with a caller-supplied proxy and optionally wait a bounded time for its solution cookie. This is a paid CapSolver operation. |
| `CAPSOLVER_SOLVE_GEETEST` | Solve GeeTest | Create one GeeTest v3 or v4 token task and optionally poll every three seconds for a bounded time. Returns the task ID when processing continues. This is a paid CapSolver operation. |
| `CAPSOLVER_SOLVE_IMAGE_TO_TEXT` | Solve Image To Text | Recognize text or number answers from base64-encoded images and return the immediate recognition result. This is a paid CapSolver operation. |
| `CAPSOLVER_SOLVE_MTCAPTCHA` | Solve MTCaptcha | Create one proxyless or caller-proxied MTCaptcha token task and optionally poll every three seconds for a bounded time. Returns the task ID when processing continues. This is a paid CapSolver operation. |
| `CAPSOLVER_SOLVE_RECAPTCHA_V2` | Solve reCAPTCHA V2 | Solve one standard or enterprise reCAPTCHA v2 challenge in task or synchronous mode. Task mode creates exactly one task and may poll for a bounded time; synchronous mode calls getToken exactly once. This is a paid CapSolver operation. |
| `CAPSOLVER_SOLVE_RECAPTCHA_V3` | Solve reCAPTCHA V3 | Solve a standard, enterprise, or M1 reCAPTCHA v3 challenge in task or synchronous mode. Task mode creates exactly one task and may poll for a bounded time. Synchronous mode calls getToken exactly once and rejects M1. M1 variants are high-cost and require provider and site-specific enablement. |
| `CAPSOLVER_SUBMIT_TASK_FEEDBACK` | Submit Task Feedback | Report whether a previously returned CapSolver token worked, using only the documented minimal task and result fields. |

## Supported Triggers

None listed.

## Installation and MCP Setup

### Path 1: SDK Installation

#### Path 1, Step 1: Install Composio

Install the Composio SDK, the OpenAI provider, and the OpenAI SDK
```python
pip install composio composio_openai openai
```

```typescript
npm install @composio/core @composio/openai openai
```

#### Path 1, Step 2: Create a Composio session

Initialize Composio with the OpenAI Responses provider and create a session scoped to CapSolver
```python
import json
from openai import OpenAI
from composio import Composio
from composio_openai import OpenAIResponsesProvider

composio = Composio(provider=OpenAIResponsesProvider())
client = OpenAI()

session = composio.create(user_id="your-user-id", toolkits=["capsolver"])
tools = session.tools()
```

```typescript
import OpenAI from "openai";
import { Composio } from "@composio/core";
import { OpenAIResponsesProvider } from "@composio/openai";

const composio = new Composio({ provider: new OpenAIResponsesProvider() });
const client = new OpenAI();

const session = await composio.create("your-user-id", { toolkits: ["capsolver"] });
const tools = await session.tools();
```

#### Path 1, Step 3: Run CapSolver tools with your agent

Send a request, execute the CapSolver tool calls through the session, and print the final answer
```python
response = client.responses.create(
    model="gpt-5.6-sol",
    tools=tools,
    input=[{"role": "user", "content": "Check my CapSolver account balance"}],
)

while True:
    tool_calls = [o for o in response.output if o.type == "function_call"]
    if not tool_calls:
        break
    results = composio.provider.handle_tool_calls(response=response, session=session)
    response = client.responses.create(
        model="gpt-5.6-sol",
        tools=tools,
        previous_response_id=response.id,
        input=[
            {"type": "function_call_output", "call_id": call.call_id, "output": json.dumps(results[i])}
            for i, call in enumerate(tool_calls)
        ],
    )

print(response.output_text)
```

```typescript
let response = await client.responses.create({
  model: "gpt-5.6-sol",
  tools,
  input: [{ role: "user", content: "Check my CapSolver account balance" }],
});

while (response.output.some((o) => o.type === "function_call")) {
  const outputs = await composio.provider.handleToolCalls(session, response.output);
  response = await client.responses.create({
    model: "gpt-5.6-sol",
    tools,
    previous_response_id: response.id,
    input: outputs,
  });
}

console.log(response.output_text);
```

### Path 2: MCP Server Setup

#### Path 2, Step 1: Install Composio

Install the Composio SDK and your agent framework
```python
pip install composio claude-agent-sdk
```

```typescript
npm install @composio/core ai @ai-sdk/mcp @ai-sdk/openai
```

#### Path 2, Step 2: Create a session with MCP enabled

Create a session scoped to CapSolver and read its MCP URL and headers
```python
from composio import Composio

composio = Composio()
session = composio.create(user_id="your-user-id", toolkits=["capsolver"], mcp=True)
```

```typescript
import { Composio } from "@composio/core";

const composio = new Composio();
const { mcp } = await composio.create("your-user-id", {
  toolkits: ["capsolver"],
  mcp: true,
});
```

#### Path 2, Step 3: Connect your agent to the MCP server

Pass the session's MCP URL and headers to your agent and run a CapSolver request
```python
import asyncio
from claude_agent_sdk import ClaudeSDKClient, ClaudeAgentOptions, AssistantMessage, TextBlock

options = ClaudeAgentOptions(
    mcp_servers={
        "composio": {
            "type": "http",
            "url": session.mcp.url,
            "headers": session.mcp.headers,
        }
    },
    system_prompt="You are a helpful assistant with access to CapSolver tools.",
    tools=[],
    allowed_tools=["mcp__composio__*"],
)

async def main():
    async with ClaudeSDKClient(options=options) as client:
        await client.query("Check my CapSolver account balance")
        async for message in client.receive_response():
            if isinstance(message, AssistantMessage):
                for block in message.content:
                    if isinstance(block, TextBlock):
                        print(block.text)

asyncio.run(main())
```

```typescript
import { createMCPClient } from "@ai-sdk/mcp";
import { openai } from "@ai-sdk/openai";
import { generateText, stepCountIs } from "ai";

const client = await createMCPClient({
  transport: { type: "http", url: mcp.url, headers: mcp.headers },
});

const { text } = await generateText({
  model: openai("gpt-5.6-sol"),
  tools: await client.tools(),
  prompt: "Check my CapSolver account balance",
  stopWhen: stepCountIs(10),
});

console.log(text);
await client.close();
```

## Why Use Composio?

### 1. AI Native CapSolver Integration

- Supports both CapSolver MCP and direct API based integrations
- Structured, LLM-friendly schemas for reliable task creation and solution polling
- Rich coverage for CAPTCHA tasks, account balances, and solution feedback

### 2. Secure API Key Auth

- Connect CapSolver with securely stored API key credentials
- Central place to manage, scope, and revoke CapSolver access
- Per user and per environment credentials instead of hard-coded keys

### 3. Agent Optimized Design

- Tools are tuned using real error and success rates to improve reliability over time
- Comprehensive execution logs so you always know what ran, when, and on whose behalf

### 4. Enterprise Grade Security

- Fine-grained RBAC so you control which agents and users can access CapSolver
- Scoped, least privilege access to CapSolver resources
- Full audit trail of agent actions to support review and compliance

## Use CapSolver with any AI Agent Framework

Choose a framework you want to connect CapSolver with:

- [ChatGPT](https://composio.dev/toolkits/capsolver/framework/chatgpt)
- [Claude Cowork](https://composio.dev/toolkits/capsolver/framework/claude-cowork)
- [Hermes](https://composio.dev/toolkits/capsolver/framework/hermes-agent)
- [Atomic Agent](https://composio.dev/toolkits/capsolver/framework/atomic-agent)

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## Frequently Asked Questions

### Do I need my own developer credentials to use CapSolver with Composio?

Yes, CapSolver requires you to configure your own API key credentials. Once set up, Composio handles secure credential storage and API request handling for you.

### Can I use multiple toolkits together?

Yes! Composio's Tool Router enables agents to use multiple toolkits. [Learn more](https://docs.composio.dev/tool-router/overview).

### Is Composio secure?

Composio is SOC 2 and ISO 27001 compliant with all data encrypted in transit and at rest. [Learn more](https://trust.composio.dev).

### What if the API changes?

Composio maintains and updates all toolkit integrations automatically, so your agents always work with the latest API versions.

---
[See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)