# How to integrate CapSolver MCP with Atomic Agent ```json { "title": "How to integrate CapSolver MCP with Atomic Agent", "toolkit": "CapSolver", "toolkit_slug": "capsolver", "framework": "Atomic Agent", "framework_slug": "atomic-agent", "url": "https://composio.dev/toolkits/capsolver/framework/atomic-agent", "markdown_url": "https://composio.dev/toolkits/capsolver/framework/atomic-agent.md", "updated_at": "2026-10-21T05:31:21.185Z" } ``` ## Introduction Atomic Agent is an open-source AI agent that runs on your machine and supports local models through llama.cpp. Connect it to 1,500+ apps through Composio, including CapSolver. This guide uses Atomic Agent's built-in Composio integration. You need Atomic Agent v0.5.6 or later, your own Composio API key, and a CapSolver account. See the [Atomic Agent documentation](https://atomicagent.io/docs/?cta_placement=atomic-agent-docs) for installation instructions. ## Also integrate 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) ## TL;DR ### How Atomic Agent connects to CapSolver Atomic Agent connects to Composio's Tool Router over Streamable HTTP MCP. It discovers the tools needed for your request, and Composio handles account authentication. Execution and account-connection tools follow Atomic Agent's configured approval policy. Review any approval prompt before allowing an action on your connected account. ## Connect CapSolver to Atomic Agent ### Connect CapSolver to Atomic Agent - Sign up or sign in to the [Composio dashboard](https://dashboard.composio.dev/?cta_placement=atomic-agent-api-key). Copy your API key. - In Atomic Agent, open the Integrations tab and select Composio. Select API key, press e, paste the key, and press Enter. The tools become available immediately, without a restart. - Ask Atomic Agent to do something in CapSolver. It searches Composio for the right tool. - On first use, open the sign-in link returned in the chat. Connect your CapSolver account, then return to Atomic Agent to continue. ### Headless setup Add the following line to ~/.atomic-agent/.env, replacing YOUR_COMPOSIO_API_KEY with your key. Start Atomic Agent after saving the file. ```bash COMPOSIO_API_KEY=YOUR_COMPOSIO_API_KEY ``` ## What is the CapSolver MCP server, and what's possible with it? The CapSolver MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your CapSolver account. It provides structured and secure access to CAPTCHA recognition and token-solving workflows, so your agent can solve supported CAPTCHA challenges, recognize text from images, check task results and balances, and submit solution feedback on your behalf. - Solve supported CAPTCHA challenges: Have your agent solve reCAPTCHA, Cloudflare Turnstile, Cloudflare Challenge, AWS WAF, GeeTest, MTCaptcha, DataDome, and BotDeflector challenges. - Track asynchronous solutions: Let the agent wait for and retrieve CAPTCHA task results, with bounded polling for supported workflows. - Recognize CAPTCHA images: Direct your agent to classify AWS WAF or reCAPTCHA v2 images, recognize image text, or run supported vision modules for points, distances, angles, rectangles, and text. - Monitor usage and report outcomes: Instruct your agent to check the CapSolver balance and submit feedback when a previously returned solution token worked or failed. ## 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. ## Troubleshooting ### Why is my API key rejected? Copy the key directly from the Composio dashboard. Atomic Agent requires ASCII characters because it sends the key in an HTTP header. Remove any extra characters introduced when copying. ### Why are Composio tools unavailable after saving a key? Check that you use Atomic Agent v0.5.6 or later and that Composio is enabled in your configuration. A "composio": { "enabled": false } setting disables the integration while keeping the saved key on disk. ### Does Composio have a free plan? The Hobby plan includes 100,000 tool calls per month. Composio-managed OAuth apps have a lower included allowance. See [Composio pricing](/pricing) for the current limits that apply to your connection. ## Complete Code None listed. ## Conclusion ### Use CapSolver from Atomic Agent With your account connected, ask Atomic Agent to work with CapSolver in natural language. You can connect more apps through the same Composio integration as you need them. Visit the [Atomic Agent website](https://atomicagent.io/?cta_placement=atomic-agent-site) or inspect the [Atomic Agent source code](https://github.com/AtomicBot-ai/atomic-agent?cta_placement=atomic-agent-repo). ## How to build CapSolver MCP Agent with another framework - [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) ## Related Toolkits - [Supabase](https://composio.dev/toolkits/supabase) - Supabase is an open-source backend platform offering scalable Postgres databases, authentication, storage, and real-time APIs. It lets developers build modern apps without managing infrastructure. - [Codeinterpreter](https://composio.dev/toolkits/codeinterpreter) - Codeinterpreter is a Python-based coding environment with built-in data analysis and visualization. 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It makes it easy for teams to organize data and automate workflows without writing code. ## Frequently Asked Questions ### What are the differences in Tool Router MCP and CapSolver MCP? With a standalone CapSolver MCP server, the agents and LLMs can only access a fixed set of CapSolver tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from CapSolver and many other apps based on the task at hand, all through a single MCP endpoint. ### Can I use Tool Router MCP with Atomic Agent? Yes, you can. Atomic Agent fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right CapSolver tools. ### Can I manage the permissions and scopes for CapSolver while using Tool Router? Yes, absolutely. You can configure which CapSolver scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do. ### How safe is my data with Composio Tool Router? All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your CapSolver data and credentials are handled as safely as possible. --- [See all toolkits](https://composio.dev/toolkits) ยท [Composio docs](https://docs.composio.dev/llms.txt)