Errors

Every error code of the API: errorId, errorCode, what it means and what to do.

Dieser Abschnitt wird auf Englisch angezeigt.

Every answer is HTTP 200 with errorId. 0 means success; otherwise there are errorCode and a human-readable errorDescription:

Error

{
  "errorId": 1,
  "errorCode": "ERROR_KEY_DOES_NOT_EXIST",
  "errorDescription": "Account authorization key not found in the system."
}

Check errorId != 0, not the HTTP status.
Branch on errorCode; errorDescription is for people and may change.
Ids 1–55 follow the Anti-Captcha registry, ids from 90 are codes of this service. An unknown failure is ERROR_INTERNAL (90) — never errorId: 0.
A failed task is not charged. 2Captcha names of the codes: 2Captcha compatibility.

All codes#

ERROR_KEY_DOES_NOT_EXIST

Bedeutung: clientKey is missing, malformed, revoked or unknown.
Was tun: Copy the key again from Dashboard → API keys; check for spaces and line breaks and that it is not a key of another service.

ERROR_NO_SLOT_AVAILABLE

Bedeutung: The key already has the maximum number of tasks in progress (200 by default).
Was tun: Wait until some tasks finish and retry in 1–2 seconds, or raise the parallel limit of the key in the dashboard.

ERROR_ZERO_BALANCE

Bedeutung: The available balance is below the price of the task. Money held for tasks in progress is not available.
Was tun: Top up the balance. Test keys do not need a balance.

ERROR_IP_NOT_ALLOWED

Bedeutung: The request came from an IP address that is not in the key's allowlist.
Was tun: Add the address or network to the allowlist of the key, or clear the list.

ERROR_CAPTCHA_UNSOLVABLE

Bedeutung: The task could not be solved after all attempts. The held money is returned — the task is free.
Was tun: Create a new task. If it repeats, check websiteURL, websiteKey, isInvisible / pageAction and the proxy.

ERROR_NO_SUCH_METHOD

Bedeutung: Unknown method, wrong HTTP method, or the body is not valid JSON (for example, taskId sent as a string).
Was tun: Send POST with a JSON body to a documented method.

ERROR_NO_SUCH_CAPCHA_ID

Bedeutung: No task with this id in your account, or its result expired (10 minutes after it was solved). Reports about unsolved tasks also get this code.
Was tun: Check taskId and the key — tasks are visible to the account that created them. Fetch results soon after they are ready, or use webhooks.

ERROR_IP_BLOCKED

Bedeutung: Requests from this IP address are blocked because of abuse.
Was tun: Write to support with your account email and the IP address.

ERROR_TASK_ABSENT

Bedeutung: task is missing or invalid: a required field is empty, a value is out of range, callbackUrl is not a public http(s) URL, or the body is larger than 1 MiB. errorDescription names the field.
Was tun: Fix the field named in errorDescription and send the task again.

ERROR_TASK_NOT_SUPPORTED

Bedeutung: Unknown or disabled task type.
Was tun: Take the type from getTaskTypes. Names are case-sensitive: RecaptchaV2TaskProxyless, not ReCaptchaV2TaskProxyLess.

ERROR_PROXY_CONNECT_REFUSED

Bedeutung: The proxy refused the connection.
Was tun: Check the address, port and type of the proxy, and that it accepts connections from the internet.

ERROR_PROXY_CONNECT_TIMEOUT

Bedeutung: Connecting to the proxy timed out.
Was tun: Check that the proxy is online; use a faster one.

ERROR_PROXY_READ_TIMEOUT

Bedeutung: The proxy accepted the connection but did not answer in time.
Was tun: Use a more stable proxy.

ERROR_PROXY_BANNED

Bedeutung: The proxy IP is blocked by Google or by the site.
Was tun: Use another proxy, preferably residential or mobile.

ERROR_RECAPTCHA_TIMEOUT

Bedeutung: The task was not solved in time: no worker took it within 180 seconds, or the attempts ran out. Not charged.
Was tun: Create a new task. If it keeps happening, check the status page and your proxy.

ERROR_RECAPTCHA_INVALID_SITEKEY

Bedeutung: Google rejected the site key.
Was tun: Take websiteKey from the page again (data-sitekey or the k parameter); do not mix v2, v3 and Enterprise keys.

ERROR_RECAPTCHA_INVALID_DOMAIN

Bedeutung: The site key is not valid for the domain of websiteURL.
Was tun: Pass the address of the page where the widget is really shown.

ERROR_RECAPTCHA_OLD_BROWSER

Bedeutung: The site considers the browser outdated.
Was tun: Pass a current desktop userAgent.

ERROR_PROXY_HAS_NO_IMAGE_SUPPORT

Bedeutung: The proxy does not load images (a compatibility code).
Was tun: Use another proxy.

ERROR_PROXY_NOT_AUTHORISED

Bedeutung: Wrong proxy login or password.
Was tun: Check proxyLogin and proxyPassword.

ERROR_VISIBLE_RECAPTCHA

Bedeutung: The widget type does not match isInvisible: an invisible reCAPTCHA sent as visible or the other way round.
Was tun: Set isInvisible according to the widget on the page.

ERROR_ACCOUNT_SUSPENDED

Bedeutung: The account is suspended.
Was tun: Write to support.

ERROR_INTERNAL

Bedeutung: A temporary failure on our side. Any unknown error is reported with this id too — never with errorId: 0.
Was tun: Retry with a growing pause (1, 2, 4… seconds). If it lasts, check the status page.

ERROR_TOO_MUCH_REQUESTS

Bedeutung: Rate limit: more than 30 createTask or 50 getTaskResult per second for the key, or more than 100 requests per second from one IP.
Was tun: Slow down and retry with a pause; poll each task every 2–3 seconds.

ERROR_SPENDING_LIMIT

Bedeutung: The daily or monthly spending cap of the key is reached.
Was tun: Raise or remove the cap in the key settings, or wait for the next day or month.