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CapSolver MCP server for AI agents and assistants

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.

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

16 Tools

Try CapSolver now

Type what you want done — sign in and watch it run live in the Tool Router playground.

TOOL ROUTER PLAYGROUND
CapSolver
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TOOLS

Supported Tools

Every CapSolver action and event your agent gets out of the box.

Classify AWS WAF Image

Classify one AWS WAF challenge image or a nine-image grid and return the immediate geometric or object result.

Classify reCAPTCHA V2 Image

Classify a reCAPTCHA v2 challenge image for a documented object category and return the immediate selection result.

Get Balance

Return the connected CapSolver account balance and non-secret package metadata.

Get Task Result

Get one asynchronous CapSolver task result, or optionally poll it every three seconds for a bounded time.

Run Vision Engine

Run one documented CapSolver vision module and return its immediate points, distance, angle, rectangles, or text result.

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.

Solve BotDeflector

Create exactly one proxyless BotDeflector task from a target flow token and optionally poll every three seconds for a bounded time.

Solve Cloudflare Challenge

Create one Cloudflare challenge task through a sticky caller-supplied proxy and optionally poll every three seconds for bounded clearance output.

Solve Cloudflare Turnstile

Create one proxyless Cloudflare Turnstile task and optionally poll every three seconds for a bounded time.

Solve DataDome

Create exactly one DataDome slider task with a caller-supplied proxy and optionally wait a bounded time for its solution cookie.

Solve GeeTest

Create one GeeTest v3 or v4 token task and optionally poll every three seconds for a bounded time.

Solve Image To Text

Recognize text or number answers from base64-encoded images and return the immediate recognition result.

Solve MTCaptcha

Create one proxyless or caller-proxied MTCaptcha token task and optionally poll every three seconds for a bounded time.

Solve reCAPTCHA V2

Solve one standard or enterprise reCAPTCHA v2 challenge in task or synchronous mode.

Solve reCAPTCHA V3

Solve a standard, enterprise, or M1 reCAPTCHA v3 challenge in task or synchronous mode.

Submit Task Feedback

Report whether a previously returned CapSolver token worked, using only the documented minimal task and result fields.

SETUP GUIDE

Connect CapSolver MCP Tool with your Agent

1

Install Composio

typescript
npm install @composio/core ai @ai-sdk/mcp @ai-sdk/openai
Install the Composio SDK and your agent framework
2

Create a session with MCP enabled

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

const composio = new Composio();
const { mcp } = await composio.create("your-user-id", {
  toolkits: ["capsolver"],
  mcp: true,
});
Create a session scoped to CapSolver and read its MCP URL and headers
3

Connect your agent to the MCP server

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();
Pass the session's MCP URL and headers to your agent and run a CapSolver request
SETUP GUIDE

Connect CapSolver API Tool with your Agent

1

Install Composio

typescript
npm install @composio/core @composio/openai openai
Install the Composio SDK, the OpenAI provider, and the OpenAI SDK
2

Create a Composio session

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();
Initialize Composio with the OpenAI Responses provider and create a session scoped to CapSolver
3

Run CapSolver tools with your agent

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);
Send a request, execute the CapSolver tool calls through the session, and print the final answer

Why Use Composio?

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

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

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

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
FRAMEWORKS

Use CapSolver with any AI Agent Framework

Choose a Framework you want to connect CapSolver with

ChatGPT logo

ChatGPT

Use CapSolver MCP with ChatGPT

Claude Cowork logo

Claude Cowork

Use CapSolver MCP with Claude Cowork

Hermes logo

Hermes

Use CapSolver MCP with Hermes

Atomic Agent logo

Atomic Agent

Use CapSolver MCP with Atomic Agent

Rolling this out across your team?

Give your team centralized access control across every framework with Composio’s MCP Gateway.

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FAQ

Frequently asked questions

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