Legacy API v.1

This API is still working but no longer updated to support new types of tasks. The only task it supports is standard image captcha.

Address: http://anti-captcha.com/in.php
Method: POST
Content-type: multipart/form-data

Property	Type	Required	Default value	Purpose
key	String	Yes		Client account key, can be found here
body	String	Yes		File body encoded in base64. Make sure to send it without line breaks. Do not include 'data:image/png,' or similar tags, only clean base64!
phrase	Boolean	No	false	0 - no requirements 1 - requires workers to enter an answer with at least one "space". If there are no spaces, they will skip the task, so use it with caution.
regsense	Boolean	No	true	0 - no requirements 1 - workers see a special mark indicating that the answer must be entered with case sensitivity.
numeric	Integer	No	0	0 - no requirements 1 - only numbers are allowed 2 - any letters are allowed except numbers
calc	Boolean	No	false	0 - no requirements 1 - workers see a special mark telling them the answer must be calculated
min_len	Integer	No	0	0 - no requirements >0 - defines minimum length of the answer
max_len	Integer	No	0	0 - no requirements >0 - defines maximum length of the answer
comment	String	No		Additional comments for workers like "enter red text". The result is not guaranteed and is totally up to the worker.
soft_id	Integer	No		ID of your application from our Developers Center. If you build an app, you can earn 10% of what your app users spend. By posting each captcha with your registered app ID, you're telling the system where to send your commission.
is_russian	Integer	No		When set to 1, it sends captcha tasks to the Russian language queue.

No errors

Has errors

OK|CAPTCHA_ID_HERE

Retrieve the solution

Send GET request to https://anti-captcha.com/res.php?key=YOUR_KEY&action=get&id=CAPTCHA_ID

No errors

Captcha not solved yet

Has errors

OK|text_from_captcha