Captcha Solver Python SDK

Official Python SDK for the Captcha Solver API. Solve reCAPTCHA v2/v3, Cloudflare Turnstile, GeeTest, Yandex SmartCaptcha, Tencent, and image/click captchas with a single method call -- sync or async.

Full API reference (all endpoints, error codes, captcha-type details): https://captcha-solver.com/en/docs/captcha-types

• Installation
• Configuration
• Quick Start
• Supported CAPTCHA Types
• Client Reference
  • CaptchaClient(...)
  • solve(task, language_pool=None, timeout=None)
  • create_task(task, language_pool=None)
  • get_task_result(task_id)
  • get_balance()
• Captcha Types
  • reCAPTCHA v2
  • reCAPTCHA v2 Enterprise
  • reCAPTCHA v3
  • Cloudflare Turnstile
  • Image to Text
  • GeeTest (v3 & v4)
  • Yandex SmartCaptcha
  • Coordinates (click captcha)
  • Tencent
• Advanced Usage
  • Check balance
  • Custom timeout and polling
  • Worker language pool
  • Async client
  • Solving multiple captchas in parallel
  • Error handling
• Running the examples
• Requirements
• API Documentation
• License

pip install captcha-solver-api

Or install the latest version from GitHub:

pip install git+https://github.com/captcha-solver-api/python-sdk.git

The client always takes the API key as an explicit argument -- it does not read environment variables on its own. Read CAPTCHA_API_KEY yourself and pass it in:

export CAPTCHA_API_KEY=your_api_key

import os
from captcha_solver_api import CaptchaClient
client = CaptchaClient(os.getenv("CAPTCHA_API_KEY"))

Or just pass the key directly, without an environment variable:

client = CaptchaClient("your_api_key")

Solve a reCAPTCHA v2 in 4 lines.

from captcha_solver_api import CaptchaClient
from captcha_solver_api.tasks import RecaptchaV2TaskProxyless
client = CaptchaClient("your_api_key")
task = RecaptchaV2TaskProxyless(
    websiteURL="https://example.com/login",
    websiteKey="YOUR_WEBSITE_KEY"
)
result = client.solve(task)
print(result["gRecaptchaResponse"])

Every method below is available on both CaptchaClient (sync, requests-based) and AsyncCaptchaClient (async, httpx-based, same names, awaited). Full docstrings with the same content live in captcha_solver_api/client.py, captcha_solver_api/async_client.py, and captcha_solver_api/tasks.py -- this section mirrors them for quick reference without leaving the README.

Constructor.

Both clients hold a reusable connection pool (requests.Session / httpx.AsyncClient) for their lifetime instead of opening one per request. Close it when you're done -- client.close() (sync) or await client.aclose() (async) -- or use either client as a context manager:

with CaptchaClient("your_api_key") as client:
    result = client.solve(task)

async with AsyncCaptchaClient("your_api_key") as client:
    result = await client.solve(task)

The main entry point. Submits task, polls until it's solved, and returns the solution -- wraps create_task() + get_task_result() so you don't poll by hand.

Returns the solution dict once status is "ready" -- its shape depends on the task type (see Captcha Types). Raises ApiError, CaptchaTimeoutError, or NetworkError.

Submits task and returns its numeric task ID without waiting for a solution. Same parameters as solve(). Use this instead of solve() only if you need to manage polling yourself (e.g. checking on many tasks from a different process). Raises ApiError, NetworkError.

Fetches the current status of a task created with create_task(). Always returns a dict with a status key ("processing" or "ready"); when "ready", also has a solution dict. This is a single poll, not a wait -- call it repeatedly (as solve() does) until status is "ready". Raises ApiError, NetworkError.

Returns the account's current balance (float) in the account's currency. Raises ApiError, NetworkError.

Each section below covers one captcha type end-to-end: task parameters, the solution shape, a runnable example, and a link to the full spec. Optional fields left unset are omitted from the request. Every code block matches a runnable file under examples/sync (and its examples/async counterpart) -- swap the placeholder websiteURL/websiteKey/etc. for values from your own target page before running. See Running the examples for details.

Types with a *Task counterpart (as opposed to *TaskProxyless) also accept proxyType / proxyAddress / proxyPort / proxyLogin / proxyPassword to solve through your own proxy instead of the service's IPs.

^{API method description.}

Use this method to solve reCAPTCHA v2 and obtain a token for the target page. Choose the proxy variant when the solving session must use your own IP address.

RecaptchaV2TaskProxyless (no proxy) / RecaptchaV2Task (with proxy).

Response: gRecaptchaResponse -- submit as g-recaptcha-response.

from captcha_solver_api import CaptchaClient
from captcha_solver_api.tasks import RecaptchaV2TaskProxyless
client = CaptchaClient("your_api_key")
task = RecaptchaV2TaskProxyless(
    websiteURL="https://example.com/login",
    websiteKey="YOUR_WEBSITE_KEY"
)
result = client.solve(task)
print(result["gRecaptchaResponse"])

With proxy, use RecaptchaV2Task instead:

task = RecaptchaV2Task(
    websiteURL="https://example.com/login",
    websiteKey="YOUR_WEBSITE_KEY",
    proxyType="http",
    proxyAddress="1.2.3.4",
    proxyPort=8080,
    proxyLogin="user",
    proxyPassword="password"
)

^{API method description.}

Use this method to solve the Enterprise version of reCAPTCHA v2 and obtain a token for a page that uses grecaptcha.enterprise.

RecaptchaV2EnterpriseTaskProxyless / RecaptchaV2EnterpriseTask. Same fields as reCAPTCHA v2, plus:

Response: gRecaptchaResponse.

from captcha_solver_api import CaptchaClient
from captcha_solver_api.tasks import RecaptchaV2EnterpriseTaskProxyless
client = CaptchaClient("your_api_key")
task = RecaptchaV2EnterpriseTaskProxyless(
    websiteURL="https://example.com/login",
    websiteKey="YOUR_WEBSITE_KEY"
)
result = client.solve(task)
print(result["gRecaptchaResponse"])

With proxy, use RecaptchaV2EnterpriseTask (same proxy fields as reCAPTCHA v2).

^{API method description.}

Use this method to obtain a score-based reCAPTCHA v3 token for a specific site, action, and minimum score. This variant does not use a proxy.

RecaptchaV3TaskProxyless. No proxy variant exists -- v3 is score-based and invisible, so there's no widget/session to pin to a proxy IP.

Response: gRecaptchaResponse.

from captcha_solver_api import CaptchaClient
from captcha_solver_api.tasks import RecaptchaV3TaskProxyless
client = CaptchaClient("your_api_key")
task = RecaptchaV3TaskProxyless(
    websiteURL="https://example.com/login",
    websiteKey="YOUR_WEBSITE_KEY",
    minScore=0.3,
    pageAction="homepage"
)
result = client.solve(task)
print(result["gRecaptchaResponse"])

^{API method description.}

Use this method to solve a Cloudflare Turnstile widget and obtain the token that the target page expects in cf-turnstile-response.

TurnstileTaskProxyless / TurnstileTask.

Response: token -- submit as cf-turnstile-response.

from captcha_solver_api import CaptchaClient
from captcha_solver_api.tasks import TurnstileTaskProxyless
client = CaptchaClient("your_api_key")
task = TurnstileTaskProxyless(
    websiteURL="https://example.com/login",
    websiteKey="YOUR_WEBSITE_KEY"
)
result = client.solve(task)
print(result["token"])

With proxy, use TurnstileTask (same proxy fields as reCAPTCHA v2).

^{API method description.}

Use this method to recognize text, numbers, or simple math expressions in an image captcha. The image is sent directly and does not require a proxy.

ImageToTextTask. No proxy variant -- the image is submitted directly, no browser session involved.

Response: text -- the recognized text/answer.

from captcha_solver_api import CaptchaClient
from captcha_solver_api.tasks import ImageToTextTask
import base64
with open("examples/assets/captcha-digits.png", "rb") as f:
    image_base64 = base64.b64encode(f.read()).decode("utf-8")
client = CaptchaClient("your_api_key")
task = ImageToTextTask(
    body=image_base64,
    numeric=1,
    minLength=4,
    maxLength=6
)
result = client.solve(task)
print(result["text"])

^{API method description: v3, v4}

Use this method to solve GeeTest puzzle captchas. Select version 3 or 4 and pass the values collected from the target page before creating the task.

GeeTestTaskProxyless / GeeTestTask. Set version=4 for v4 (with initParameters["captcha_id"]); v3 is the default and needs gt/challenge instead.

Response: v3 -- challenge, validate, seccode. v4 -- captcha_id, lot_number, pass_token, gen_time, captcha_output. Docs: v3 ↗, v4 ↗

from captcha_solver_api import CaptchaClient
from captcha_solver_api.tasks import GeeTestTaskProxyless
client = CaptchaClient("your_api_key")
task = GeeTestTaskProxyless(
    websiteURL="https://example.com/login",
    gt="f2ae6cadcf7886856696c46d84d109d1",
    challenge="12345678abc90123d45678e90123f45g6"  # dynamic -- fetch a fresh one per request
)
result = client.solve(task)
print(result["validate"])
print(result["seccode"])

challenge is session-specific and expires quickly, so it can't be hardcoded into a static example -- see examples/sync/geetest_v3.py for where the fetch belongs in the flow.

task = GeeTestTaskProxyless(
    websiteURL="https://example.com/login",
    version=4,
    initParameters={"captcha_id": "YOUR_CAPTCHA_ID"}
)
result = client.solve(task)
print(result["captcha_output"])

With proxy, use GeeTestTask (same proxy fields as reCAPTCHA v2).

^{API method description.}

Use this method to solve the token-based Yandex SmartCaptcha and obtain a token for the widget on the target page. Use the coordinates method for image challenges.

YandexSmartCaptchaTaskProxyless / YandexSmartCaptchaTask -- token-based challenge. For the image challenge instead, use CoordinatesTask with imgType="smart_captcha" (see Coordinates below).

Proxy variant note: proxyType also accepts "https" for this captcha type only (in addition to http/socks4/socks5).

Response: token.

from captcha_solver_api import CaptchaClient
from captcha_solver_api.tasks import YandexSmartCaptchaTaskProxyless
client = CaptchaClient("your_api_key")
task = YandexSmartCaptchaTaskProxyless(
    websiteURL="https://example.com/login",
    websiteKey="YOUR_WEBSITE_KEY"
)
result = client.solve(task)
print(result["token"])

With proxy, use YandexSmartCaptchaTask (same proxy fields as reCAPTCHA v2, plus the https option above).

^{API method description.}

Use this method to identify points that a worker should click in an image. It supports generic click captchas and the image version of Yandex SmartCaptcha.

CoordinatesTask. Used both for generic "click on X" captchas and for Yandex SmartCaptcha's image challenge. No proxy variant -- the image is submitted directly.

Response: coordinates -- a list of {"x": int, "y": int} pixel positions to click, in order.

from captcha_solver_api import CaptchaClient
from captcha_solver_api.tasks import CoordinatesTask
import base64
with open("examples/assets/fruit-click.png", "rb") as f:
    image_base64 = base64.b64encode(f.read()).decode("utf-8")
client = CaptchaClient("your_api_key")
task = CoordinatesTask(
    body=image_base64,
    comment="click on the green apple"
)
result = client.solve(task)
print(result["coordinates"])  # [{"x": 140, "y": 110}]

For the Yandex SmartCaptcha image challenge, see examples/sync/yandex_smartcaptcha_image.py (or examples/async).

^{API method description.}

Use this method to solve Tencent Captcha and obtain the ticket and callback values required by the target page.

TencentTaskProxyless / TencentTask.

Response: appid, ret, ticket, randstr -- pass all four into the page's Tencent captcha callback.

from captcha_solver_api import CaptchaClient
from captcha_solver_api.tasks import TencentTaskProxyless
client = CaptchaClient("your_api_key")
task = TencentTaskProxyless(
    websiteURL="https://example.com/register",
    appId="YOUR_APP_ID"
)
result = client.solve(task)
print(result["ticket"])

With proxy, use TencentTask (same proxy fields as reCAPTCHA v2).

from captcha_solver_api import CaptchaClient
client = CaptchaClient("your_api_key")
balance = client.get_balance()
print(f"Balance: {balance}")

client = CaptchaClient(
    client_key="your_api_key",
    timeout=180,
    polling_interval=5
)

A single solve() call can also override the client's default timeout, which is handy for captcha types that reliably take longer to solve (e.g. classic reCAPTCHA v2) without changing it for every other call:

result = client.solve(task, timeout=300)

Set a default language_pool once at construction instead of passing it to every call:

client = CaptchaClient(client_key="your_api_key", language_pool="en")
result = client.solve(task)  # uses the "en" pool
result = client.solve(task, language_pool="ru")  # overrides it just for this call

AsyncCaptchaClient mirrors CaptchaClient method-for-method (create_task, get_task_result, get_balance, solve, same constructor options), just awaited and built on httpx instead of requests. It keeps one httpx.AsyncClient connection pool open for its whole lifetime, so concurrent solve() calls (see below) and repeated polling share keep-alive connections instead of each opening a new one:

import asyncio
from captcha_solver_api import AsyncCaptchaClient
from captcha_solver_api.tasks import RecaptchaV2TaskProxyless

async def main():
    client = AsyncCaptchaClient("your_api_key")
    task = RecaptchaV2TaskProxyless(
        websiteURL="https://example.com/login",
        websiteKey="YOUR_WEBSITE_KEY"
    )
    result = await client.solve(task)
    print(result["gRecaptchaResponse"])

asyncio.run(main())

See examples/async for every captcha type in async form.

This is the main reason to reach for the async client -- run several solve() calls concurrently instead of waiting for each one in turn:

import asyncio
from captcha_solver_api import AsyncCaptchaClient
from captcha_solver_api.tasks import RecaptchaV2TaskProxyless, TurnstileTaskProxyless

async def solve_multiple():
    client = AsyncCaptchaClient("your_api_key")

    task1 = client.solve(RecaptchaV2TaskProxyless(websiteURL="https://site1.com", websiteKey="key1"))
    task2 = client.solve(TurnstileTaskProxyless(websiteURL="https://site2.com", websiteKey="key2"))

    results = await asyncio.gather(task1, task2, return_exceptions=True)
    return results

results = asyncio.run(solve_multiple())

This completes in roughly the time of the slowest single captcha, not the sum of all of them.

from captcha_solver_api import CaptchaClient, ApiError, CaptchaTimeoutError, NetworkError, ValidationError
client = CaptchaClient("your_api_key")
try:
    result = client.solve(task)
except ValidationError as e:
    print(f"Invalid argument: {e}")
except ApiError as e:
    print(f"API error: {e.error_code} {e.error_description}")
except CaptchaTimeoutError:
    print("Task timed out")
except NetworkError as e:
    print(f"Network error: {e}")

TimeoutError is still exported as a deprecated alias of CaptchaTimeoutError. Avoid importing it by name: it shadows Python's built-in TimeoutError.

See the dedicated examples documentation for the full sync/async example list, setup steps, expected results, and placeholder guidance.

• Image/click captchas (image_to_text.py, coordinates.py, yandex_smartcaptcha_image.py) run end-to-end with nothing but a valid CAPTCHA_API_KEY -- they read sample images bundled in examples/assets, no target page needed.
• Token captchas (recaptcha_v2.py, recaptcha_v2_enterprise.py, recaptcha_v3.py, turnstile.py, yandex_smartcaptcha.py, geetest_v4.py, tencent.py) use placeholder values (https://example.com/..., YOUR_WEBSITE_KEY, YOUR_APP_ID, YOUR_CAPTCHA_ID) -- replace these with the real values from your own target page before running.
• geetest_v3.py additionally needs challenge fetched fresh for every request -- it's single-use and expires within seconds, so it can't be hardcoded into a static example. "https://target-site.com/path/to/geetest/init" is a placeholder; replace it with a request to your own target's equivalent endpoint (or wherever it exposes gt/challenge) -- see the script for where that fetch belongs in the flow.
• Proxy variants (*Task classes, as opposed to *TaskProxyless) use placeholder proxy credentials (1.2.3.4 / user / password) in every example file -- proxies are a paid, account-specific resource, so there's nothing public to ship here. Swap in your own proxy details to run those blocks for real.

export CAPTCHA_API_KEY=your_api_key
python examples/sync/balance.py
python examples/sync/image_to_text.py
python examples/sync/coordinates.py

Verified against the live API during development, using real target pages and real proxy credentials in place of the placeholders shown above: every captcha type in this SDK -- proxyless and with proxy -- returned a real, correctly-shaped solution when pointed at a genuine target. geetest_v3.py's request shape was likewise confirmed correct when given a real, freshly-fetched gt/challenge pair.

• Python 3.9 or newer.
• Captcha Solver account with a valid API key.

Full API reference: https://captcha-solver.com/en/docs/captcha-types

This project is licensed under the MIT License. See LICENSE.md for details.