LLM (decides)
   │  emits a tool call, e.g. solve_captcha(...)
   ▼
capsolver-agent (schema + executor)   ← tool-adapter layer
   │  executor.execute(...) internally relays to ↓
   ▼
capsolver-core (solve / detect / solve_on_page)
   │
   ▼
CapSolver API

# 1) Install the core engine first (agent depends on it)
pip install git+https://github.com/capsolver-ai/capsolver-core.git
 
# 2) Then install agent itself
pip install git+https://github.com/capsolver-ai/capsolver-agent.git

# With LangChain support
pip install "capsolver-agent[langchain] @ git+https://github.com/capsolver-ai/capsolver-agent.git"
# With Playwright (detect / solve_on_page)
pip install "capsolver-agent[browser] @ git+https://github.com/capsolver-ai/capsolver-agent.git"

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

1. Hand the tools to the model ───────────────────┐
2. The model answers and decides: do I need a tool here?
   ├─ No  → return the final answer, done         │
   └─ Yes → return a tool_call                    │
3. You execute the call → relay to core → get a result
4. Feed the result back to the model ─────────────┘  back to step 2, next round

from capsolver_core import Capsolver               # capsolver-core engine
from capsolver_agent.schema import ToolExecutor
 
cap = Capsolver(api_key="YOUR_CAPSOLVER_KEY")       # the same Capsolver from the "Core SDK" page
executor = ToolExecutor(cap)                        # wrap a "tool call → core method" dispatcher around it

executor.execute("solve_captcha",  {...})   # → cap.solve(CaptchaInfo(...))
executor.execute("detect_captchas", {...})  # → cap.detect(page)
executor.execute("get_balance",    {})      # → cap.get_balance()

from capsolver_agent.schema import create_executor
 
executor = create_executor(api_key="YOUR_CAPSOLVER_KEY")   # == Capsolver(...) + ToolExecutor(...)

from capsolver_agent.schema import get_all_tools
 
tools = [t.to_openai_function() for t in get_all_tools()]
# to_openai_function() → {"type": "function", "function": {...}}, the format OpenAI's tools= expects
# you can also use t.to_json_schema() → an MCP-style tool description (name + inputSchema)

result = await executor.execute("solve_captcha", {
    "captcha_type": "reCaptchaV2",
    "website_url": "https://example.com",
    "website_key": "6Le-wvkSAAAAAPBMRT...",
})
# result → {"success": True, "solution": {"token": "03AF...", ...}}

import asyncio, json
from openai import OpenAI
from capsolver_agent.schema import get_all_tools, create_executor
 
client = OpenAI()                                       # your LLM client
executor = create_executor(api_key="YOUR_CAPSOLVER_KEY") # 3.1 connect core
tools = [t.to_openai_function() for t in get_all_tools()] # 3.2 hand tools to the model
 
async def run(prompt: str) -> str:
    messages = [{"role": "user", "content": prompt}]
    while True:
        resp = client.chat.completions.create(model="gpt-4o", messages=messages, tools=tools)
        msg = resp.choices[0].message
        messages.append(msg)
 
        if not msg.tool_calls:                          # model no longer calls a tool
            return msg.content                          # → final answer, exit the loop
 
        for call in msg.tool_calls:                     # model wants to call a tool
            result = await executor.execute(            # 3.3 execute → relay to core
                call.function.name,
                json.loads(call.function.arguments),
            )
            messages.append({                           # feed the result back, next round
                "role": "tool",
                "tool_call_id": call.id,
                "content": json.dumps(result),
            })
 
asyncio.run(run("Solve the reCAPTCHA v2 on https://example.com for me; the sitekey is 6Lc..."))

Agent browses the page → hits a CAPTCHA → calls the solve action (core: solve_on_page) → gets a token → continues the task

git clone https://github.com/capsolver-ai/capsolver-agent.git
cd capsolver-agent
uv sync
 
export CAPSOLVER_API_KEY=CAP-XXXXXX
export OPENAI_API_KEY=sk-XXXXXX      # required by the LLM-based examples

# OpenAI Function Calling
pip install openai
# OpenAI Agents SDK
pip install openai-agents
# LangChain
pip install "capsolver-agent[langchain] @ git+https://github.com/capsolver-ai/capsolver-agent.git" langchain-openai langgraph
# Browser Use
pip install browser-use langchain-openai playwright && playwright install chromium
# Playwright (no LLM)
pip install git+https://github.com/capsolver-ai/capsolver-core.git playwright && playwright install chromium