SOLVECAPTCHA.com API

SolveCaptcha is a human-powered image and CAPTCHA recognition service. SolveCaptcha's main purpose is solving your CAPTCHAs in a quick an accurate way by human employees, but the service is not limited only to CAPTCHA solving. You can convert to text any image that a human can recognize.

Introduction

We provide an API that allows you to automate the process and integrate your software with our service.

There are few simple steps to solve your captcha or recognize the image:

1. Send your image or captcha to our server.
2. Get the ID of your task.
3. Start a cycle that checks if your task is completed.
4. Get the result.

Recent Changes

January 18, 2018
New parameter added for invisible ReCaptcha More info here

January 17, 2018
New method for FunCaptcha implemented! More info here

December 25, 2017
KeyCaptcha method is available again! More info here

December 12, 2017
AudioCaptcha method is now deprecated as non effective and unpolular method.

September 6, 2017
KeyCaptcha method is currenly unavailable.

February 24, 2017
Added some notes on Invisible ReCaptcha solving. More info here.

November 24, 2016
We've added new error codes to our API corresponding to requests limits. More info here.

November 9, 2016
We've added some new examples for ReCaptcha V2 API check them out here.

November 9, 2016
At the moment ReCaptcha V2 can be solved for any website. It's required to send us the full URL of the page where you get ReCaptcha (it wasn't required before). Sending the proxy information is not obligatory yet but it's recommended.

Rates

Our rates depend on type of captcha that you want to solve and the method used. Rate for normal captcha also depends on current service load.

Solving Captchas

The process of solving captchas with SolveCaptcha is really easy and it's mostly the same for all types of captchas:

1. Get your API key from your account settings page. Each user is given a uniqe authentication token, we call it API key. It's a 32-characters string that looks like: 1abc234de56fab7c89012d34e56fa7b8 This key will be used for all your requests to our server.
2. Submit a HTTP POST request to our API URL: http://api.solvecaptcha.com/in.php with parameters corresponding to the type of your captcha.
   Server will return captcha ID or an error code if something gone wrong.
3. Make a timeout: 20 seconds for ReCaptcha, 5 seconds for other types of captchas.
4. Submit a HTTP GET request to our API URL: http://api.solvecaptcha.com/res.php to get the result.
   If captha is already solved server will return the answer in format corresponding to the type of your captcha.
   By default answers are returned as plain text like: OK|Your answer. But answer can also be returned as JSON {"status":1,"request":"TEXT"} if json parameter is used.
   If captcha is not solved yet server will return CAPCHA_NOT_READY result. Retry your request after 5 seconds.
   If something gone wrong server will return an error code.

Normal Captcha

Normal Captcha is an image that contains distored but human-readable text. To solve the captcha user have to type the text from the image.

To solve the captcha with our service you have to submit the image with HTTP POST request to our API URL: http://api.solvecaptcha.com/in.php
Server accepts images in multipart or base64 format.

Multipart sample form

<form method="post" action="http://api.solvecaptcha.com/in.php" enctype="multipart/form-data">
<input type="hidden" name="method" value="post">
Your key:
<input type="text" name="key" value="YOUR_APIKEY">
The CAPTCHA file:
<input type="file" name="file">
<input type="submit" value="Upload and get the ID">
</form>

YOUR_APIKEY is Your API key.

Base64 sample form

<form method="post" action="http://api.solvecaptcha.com/in.php">
<input type="hidden" name="method" value="base64">
Your key:
<input type="text" name="key" value="YOUR_APIKEY">
The CAPTCHA file body in base64 format:
<textarea name="body">BASE64_FILE</textarea>
<input type="submit" value="Upload and get the ID">
</form>

YOUR_APIKEY is your API key.

BASE64_FILE is base64-encoded image body.

You can provide additional parameters with your request to define what kind of captcha you're sending and to help workers to solve your captcha correctly. You can find the full list of parameters in the table below.

If everything is fine server will return the ID of your captcha as plain text, like: OK|2122988149 or as JSON {"status":1,"request":"2122988149"} if json parameter was used.

If something gone wrong server will return an error. See Error Handling chapter for the list of errors.

Make a 5 seconds timeout and submit a HTTP GET request to our API URL: http://api.solvecaptcha.com/res.php providing the captcha ID. The list of parameters is in the table below.

If everything is fine and your captcha is solved server will return the answer as plain text, like: OK|TEXT or as JSON {"status":1,"request":"TEXT"} if json parameter was used.

Otherwise server will return CAPCHA_NOT_READY that means that your captcha is not solved yet. Just repeat your request in 5 seconds.

If something gone wrong server will return an error. See Error Handling chapter for the list of errors.

List of POST request parameters for http://api.solvecaptcha.com/in.php

List of GET request parameters for http://api.solvecaptcha.com/res.php

Request URL example:

http://api.solvecaptcha.com/res.php?key=1abc234de56fab7c89012d34e56fa7b8&action=get&id=2122988149

Text Captcha

Text Captcha is a type of captcha that is represented as text and doesn't contain images. Usually you have to answer a question to pass the verification.

For example: "If tomorrow is Saturday, what day is today?".

To solve text captcha with our service you have to submit the text as a value of textcaptcha parameter with HTTP POST request to our API URL: http://api.solvecaptcha.com/in.php

Sample form for Text Captcha

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>

<body>
<form method="post" action="http://api.solvecaptcha.com/in.php" enctype="multipart/form-data" accept-charset="UTF-8">
Your key:
<input type="text" name="key" value="YOUR_APIKEY">
<input type="text" name="textcaptcha" value="If tomorrow is Saturday, what day is today?">
<input type="submit" value="Send and get the ID">
</form>
</body>
</html>

YOUR_APIKEY is your API key.

You can provide additional parameters with your request to tell us more about your captcha and to help workers to solve it correctly. You can find the full list of parameters in the table below.

If everything is fine server will return the ID of your captcha as plain text, like: OK|2122988149 or as JSON {"status":1,"request":"2122988149"} if json parameter was used.

If something gone wrong server will return an error. See Error Handling chapter for the list of errors.

Make a 5 seconds timeout and submit a GET request to our API URL: http://api.solvecaptcha.com/res.php providing the captcha ID. The list of parameters is in the table below.

If everything is fine and your captcha is solved server will return the answer as plain text, like: OK|TEXT or as JSON {"status":1,"request":"TEXT"} if json parameter was used.

Otherwise server will return CAPCHA_NOT_READY that means that your captcha is not solved yet. Just repeat your request in 5 seconds.

If something gone wrong server will return an error. See Error Handling chapter for the list of errors.

List of POST request parameters for http://api.solvecaptcha.com/in.php

List of GET request parameters for http://api.solvecaptcha.com/res.php

Request URL example:

http://api.solvecaptcha.com/res.php?key=1abc234de56fab7c89012d34e56fa7b8&action=get&id=2122988149

ReCaptcha V2

ReCaptcha V2 also known as I'm not a robot reCaptcha is a very popular type of captcha that looks like this:

Solving ReCaptcha V2 with our new method is pretty simple:

• Look at the element's code at the page where you found ReCaptcha.



• Find a link that begins with www.google.com/recaptcha/api2/anchor or find data-sitekey parameter.

• Copy the value of k parameter of the link (or value of data-sitekey parameter).



• Submit a HTTP GET or POST request to our API URL: http://api.solvecaptcha.com/in.php with method set to userrecaptcha and provide the value found on previous step as value for googlekey and full page URL as value for pageurl. Sending proxies is not obligatory ar the moment but it's recommended.
  You can find the full list of parameters in the table below.

  Request URL example:

  http://api.solvecaptcha.com/in.php?key=1abc234de56fab7c89012d34e56fa7b8&method=userrecaptcha&googlekey=6Le-wvkSVVABCPBMRTvw0Q4Muexq1bi0DJwx_mJ-&pageurl=http://mysite.com/page/with/recaptcha?appear=1&here=now

• If everything is fine server will return the ID of your captcha as plain text, like: OK|2122988149 or as JSON {"status":1,"request":"2122988149"} if json parameter was used.
  Otherwise server will return an error code.

• Make a 15-20 seconds timeout then submit a HTTP GET request to our API URL: http://api.solvecaptcha.com/res.php to get the result.
  The full list of parameters is in the table below.

  If captha is already solved server will respond in plain text or JSON and return the answer token that looks like:

  03AHJ_Vuve5Asa4koK3KSMyUkCq0vUFCR5Im4CwB7PzO3dCxIo11i53epEraq-uBO5mVm2XRikL8iKOWr0aG50sCuej9bXx5qcviUGSm4iK4NC_Q88flavWhaTXSh0VxoihBwBjXxwXuJZ-WGN5Sy4dtUl2wbpMqAj8Zwup1vyCaQJWFvRjYGWJ_TQBKTXNB5CCOgncqLetmJ6B6Cos7qoQyaB8ZzBOTGf5KSP6e-K9niYs772f53Oof6aJeSUDNjiKG9gN3FTrdwKwdnAwEYX-F37sI_vLB1Zs8NQo0PObHYy0b0sf7WSLkzzcIgW9GR0FwcCCm1P8lB-50GQHPEBJUHNnhJyDzwRoRAkVzrf7UkV8wKCdTwrrWqiYDgbrzURfHc2ESsp020MicJTasSiXmNRgryt-gf50q5BMkiRH7osm4DoUgsjc_XyQiEmQmxl5sqZP7aKsaE-EM00x59XsPzD3m3YI6SRCFRUevSyumBd7KmXE8VuzIO9lgnnbka4-eZynZa6vbB9cO3QjLH0xSG3-egcplD1uLGh79wC34RF49Ui3eHwua4S9XHpH6YBe7gXzz6_mv-o-fxrOuphwfrtwvvi2FGfpTexWvxhqWICMFTTjFBCEGEgj7_IFWEKirXW2RTZCVF0Gid7EtIsoEeZkPbrcUISGmgtiJkJ_KojuKwImF0G0CsTlxYTOU2sPsd5o1JDt65wGniQR2IZufnPbbK76Yh_KI2DY4cUxMfcb2fAXcFMc9dcpHg6f9wBXhUtFYTu6pi5LhhGuhpkiGcv6vWYNxMrpWJW_pV7q8mPilwkAP-zw5MJxkgijl2wDMpM-UUQ_k37FVtf-ndbQAIPG7S469doZMmb5IZYgvcB4ojqCW3Vz6Q

  If captcha is not solved yet server will return CAPCHA_NOT_READY result. Retry your request after 5 seconds.
  

  If something gone wrong server will return an error code.

• Locate the element with id g-recaptcha-response and make it visible deleting display:none parameter.

  

  Please note: sometimes content on the page is generated dynamically and you will not see this element in html source.
  In such cases you have to explore javascript code that generates the content. "Inspect" option in Google Chrome can help in that.

  As an alternative you can just use javascript to set the value of g-recaptcha-response field:

  document.getElementById("g-recaptcha-response").innerHTML="TOKEN_FROM_SOLVECAPTCHA";

• An input field will appear on the page. And you just have to paste the answer token to that field and submit the form.



• Congratulations, you've passed the recaptha

ReCaptcha Callback

Sometimes there's no submit button and a callback function is used isntead of this. The function is executed when reCaptcha is solved.

Callback function is usually defined in data-callback parameter of reCaptcha, for example:

data-callback="myCallbackFunction"

Or sometimes it's defined as callback parameter of grecaptcha.render function, for example:

grecaptcha.render('example', {
  'sitekey' : 'someSitekey',
  'callback' : myCallbackFunction,
  'theme' : 'dark'
});

Also there's another way to find the callback function - open javascript console of your browser and explore ReCaptcha configuration object:

___grecaptcha_cfg.clients[0].aa.l.callback

Note that aa.l may change and there can be multiple clients so you have to check clients[1], clients[2] too.

Finally all you have to do is to call that function:

myCallbackFunction();

Or even this way:

___grecaptcha_cfg.clients[0].aa.l.callback();

Sometimes it is required to provide an argument and in most cases you should put the token there. For example:

myCallbackFunction('TOKEN');

Invisible ReCaptcha V2

ReCaptcha V2 also has an invisible version.
You can check how it looks like here: https://www.google.com/recaptcha/api2/demo?invisible=true
Also recently we noticed some changes in invisible ReCaptcha algorithms on few websites and added new parameter invisible=1 that should be used for invisible ReCaptcha.
Read more about invisible ReCaptcha below.

Invisible ReCaptcha is located on a DIV layer positioned -10 000 px from top that makes it invisible for user.

ReCaptcha is activated on page load or on user's actions like click somewhere or submit a form - that depends on the website. If user’s cookies are good enough then he will just pass it automatically without any additional action. Otherwise user will see standard ReCaptcha form with a challenge.

In most cases when challenge is completed a callback function is executed. You can read more about callback here.

If you are still not sure - there are few ways to determine that ReCaptcha is in invisible mode:

• You don't see "I'm not a robot" checkbox on the page but getting recaptcha challenge when making some actions there
• ReCaptcha's iframe link contains parameter size=invisible
• ReCaptcha's configuration object contains parameter size that is set to invisible, for example ___grecaptcha_cfg.clients[0].aa.l.size is equal to invisible

How to bypass invisible ReCaptcha in browser?

Method 1: using javascript:

• Change the value of g-recaptcha-response element to the answer token you received from our server:

document.getElementById("g-recaptcha-response").innerHTML="TOKEN_FROM_SOLVECAPTCHA";

• Execute the action that needs to be performed on the page after solving reCaptcha.

Usually there's a form that should be submitted and you need to identify the form by id or name or any other attribute and then submit the form. Here are few examples:

document.getElementById("recaptcha-demo-form").submit(); //by id "recaptcha-demo-form"
document.getElementsByName("myFormName")[0].submit(); //by element name "myFormName"
document.getElementsByClassName("example").submit(); //by class name "example"

Or sometimes there's a callback function executed when reCaptcha is solved.

Callback function is usually defined in data-callback parameter of reCaptcha, for example:

data-callback="myCallbackFunction"

Or sometimes it's defined as callback parameter of grecaptcha.render function, for example:

grecaptcha.render('example', {
  'sitekey' : 'someSitekey',
  'callback' : myCallbackFunction,
  'theme' : 'dark'
});

And all you have to do is to call that function:

myCallbackFunction();

• Voila! You've done that with just 2 strings of code.

Method 2: changing HTML:

• Cut the div containing ReCaptcha from page body.

<div style="visibility: hidden; position: absolute; width:100%; top: -10000px; left: 0px; right: 0px; transition: visibility 0s linear 0.3s, opacity 0.3s linear; opacity: 0;">
<div style="width: 100%; height: 100%; position: fixed; top: 0px; left: 0px; z-index: 2000000000; background-color: #fff; opacity: 0.5;  filter: alpha(opacity=50)">
</div>
<div style="margin: 0 auto; top: 0px; left: 0px; right: 0px; position: absolute; border: 1px solid #ccc; z-index: 2000000000; background-color: #fff; overflow: hidden;">
<iframe src="https://www.google.com/recaptcha/api2/bframe?hl=en&amp;v=r20170213115309&amp;k=6LfP0CITAAAAAHq9FOgCo7v_fb0-pmmH9VW3ziFs#zglq3yifgkmj" title="recaptcha challenge" style="width: 100%; height: 100%;" scrolling="no" name="zglq3yifgkmj" frameborder="0"></iframe>
</div>
</div>

• Cut the whole block:

<div class=""><!-- BEGIN: ReCAPTCHA implementation example. -->
<div id="recaptcha-demo" class="g-recaptcha" data-sitekey="6LfP0CITAAAAAHq9FOgCo7v_fb0-pmmH9VW3ziFs" data-callback="onSuccess" data-bind="recaptcha-demo-submit"><div class="grecaptcha-badge" style="width: 256px; height: 60px; transition: right 0.3s ease 0s; position: fixed; bottom: 14px; right: -186px; box-shadow: 0px 0px 5px gray;"><div class="grecaptcha-logo"><iframe src="https://www.google.com/recaptcha/api2/anchor?k=6LfP0CITAAAAAHq9FOgCo7v_fb0-pmmH9VW3ziFs&amp;co=aHR0cHM6Ly93d3cuZ29vZ2xlLmNvbTo0NDM.&amp;hl=en&amp;v=r20170213115309&amp;size=invisible&amp;cb=uror1hlow5a" title="recaptcha widget" scrolling="no" name="undefined" width="256" height="60" frameborder="0"></iframe></div><div class="grecaptcha-error"></div><textarea id="g-recaptcha-response" name="g-recaptcha-response" class="g-recaptcha-response" style="width: 250px; height: 40px; border: 1px solid #c1c1c1; margin: 10px 25px; padding: 0px; resize: none;  display: none; "></textarea></div></div>
<script>
var onSuccess = function(response) {
  var errorDivs = document.getElementsByClassName("recaptcha-error");
  if (errorDivs.length) {
    errorDivs[0].className = "";
  }
  var errorMsgs = document.getElementsByClassName("recaptcha-error-message");
  if (errorMsgs.length) {
    errorMsgs[0].parentNode.removeChild(errorMsgs[0]);
  }
  document.getElementById("recaptcha-demo-form").submit();};
</script><!-- Optional noscript fallback. --><!-- END: ReCAPTCHA implementation example. --></div>

• Put the following code instead of the block you’ve just cut:

<input type="submit">
<textarea name="g-recaptcha-response">%g-recaptcha-response%</textarea>

Where %g-recaptcha-response% - is an answer token you’ve got from our service.
• You will see “Submit query” button.
  Press the button to submit the form with g-recaptcha-response and all other form data to the website.

List of GET/POST request parameters for http://api.solvecaptcha.com/in.php

List of GET request parameters for http://api.solvecaptcha.com/res.php

Request URL example:

http://api.solvecaptcha.com/res.php?key=1abc234de56fab7c89012d34e56fa7b8&action=get&id=2122988149

ReCaptcha V2 (old deprecated method)

Solving ReCaptcha V2 with that old method is less accurate and more compex. So we recommend to use the new method. But the old method is cheaper and we still support it.

We can solve recaptchas with different grids like 3x3, 2x4, 4x4.

Also you can solve ReCaptcha V2 with ClickCaptcha method if it's more suitable for you.

And of course we support ReCaptcha V2 challenges when you have to select around an object or few objects. Read more here.

To solve the ReCaptcha V2 you have to:

• Click on initial ReCaptcha's checkbox. You will get a set of images and an instruction that tells you what to click. Actually it's one image with the grid on it.

• Optionally: determine the grid and define it in your request with recaptchacols and recaptcharows parameters.
  If not defined we'll check the size of the image. If it's 300x300px we put 3x3 grid on it. If the size is different we put 4x4 grid.

• Submit a HTTP POST request to our API URL: http://api.solvecaptcha.com/in.php providing recaptcha parameter set to 1.

  Server accepts images in multipart or base64 format. You have to send only the image set without the grid and blue box.

  Also you can provide instructions as an image using imginstructions parameter. For more info please check the full list of parameters in the table below.

• Server will return captcha ID or an error code if something gone wrong.

• Make a 5 seconds timeout and submit a HTTP GET request to our API URL: http://api.solvecaptcha.com/res.php to get the result.

  If captha is already solved server will return the answer with numbers of grid cells that you need to click like: OK|click:3/8/9/.

  Grid cells are numbered starting from number 1 from left to right from top to bottom. If the grid contain more than 9 cells, letters a-g are used for cells 10-16.

  If captcha is not solved yet server will return CAPCHA_NOT_READY result. Retry your request after 5 seconds.

  If something gone wrong server will return an error code.

• You simulate clicks on cells from the answer.

Canvas method

In case when ReCaptcha challenge is to select around object you can pass canvas parameter set to 1.

Server will return the result in the following format: canvas:x,y,x,y,x,y;x,y,x,y,x,y;

Where each pair of x and y are coordinates of points you need to click to select an area around object. If there are more than one area, coordininates of areas will be separated by semicolon.

For example:
canvas:5,5,3,91,93,90,90,7,8,6; - one area
canvas:5,5,3,91,93,90,90,7,8,6;208,211,208,287,294,294,293,209,207,210; - two areas
Point 0,0 is top left corner of the image.

You need to click on these points one by one to pass the challenge.

Multipart sample form for ReCaptcha V2 old method

<form method="post" action="http://api.solvecaptcha.com/in.php" enctype="multipart/form-data">
<input type="hidden" name="method" value="post">
<input type="hidden" name="recaptcha" value="1"><br>
<input type="hidden" name="canvas" value="0"><br>
Your key:
<input type="text" name="key" value="YOUR_APIKEY">
ReCaptcha file:
<input type="file" name="file">
Image with instruction:
<input type="file" name="imginstructions">
<input type="submit" value="Upload and get the ID">
</form>

YOUR_APIKEY is Your API key.

Base64 sample form for ReCaptcha V2 old method

<form method="post" action="http://api.solvecaptcha.com/in.php">
<input type="hidden" name="method" value="base64">
<input type="hidden" name="recaptcha" value="1"><br>
<input type="hidden" name="canvas" value="0"><br>
Your key:
<input type="text" name="key" value="YOUR_APIKEY">
ReCaptcha file body in base64 format:
<textarea name="body">BASE64_RECAPTCHA_FILE</textarea>
Image with instruction body in base64 format:
<textarea name="imginstructions">BASE64_INSTRUCTION_FILE</textarea>
<input type="submit" value="Upload and get the ID">
</form>

YOUR_APIKEY is your API key.

BASE64_RECAPTCHA_FILE is base64-encoded image body of ReCaptcha V2.

BASE64_INSTRUCTION_FILE is base64-encoded image body of image with instruction.

List of POST request parameters for http://api.solvecaptcha.com/in.php

Please note: you have to send the ReCaptcha image itself, not its screenshot. And you dont have to combine that image with anything you like, just send it as is.
Max size for ReCaptcha image is 100 kB.
Max size for imginstructions is 25 kB.

List of GET request parameters for http://api.solvecaptcha.com/res.php

Request URL example:

http://api.solvecaptcha.com/res.php?key=1abc234de56fab7c89012d34e56fa7b8&action=get&id=2122988149

ReCaptcha V1

ReCaptcha V1 is old and mostly replaced with ReCaptcha V2, but you still can find it on some websites.

It can have diffenent themes but usually looks like this:

To solve the ReCaptcha V1 you have to:

• Download the page from the noscript element src link and find the element with id recaptcha_challenge_field in the source code of the page.

• Get the image from link: www.google.com/recaptcha/api/image?c=recaptcha_challenge_field.

• Submit the image with HTTP POST request to our server in the same way as for Normal Captcha.

The remaining part of the process is absolutely the same as for Normal Captchas so please refer to the description of Solving Normal Captcha process.

ClickCaptcha

This method allows you to solve any captcha that requires clicking on images, like Shapchat's Ghost Captcha, ReCaptcha V2, ASIRRA, etc.

To solve any ClickCaptcha you have to:

• Get an image and an instruction that tells you what to click.

• Submit a HTTP POST request to our API URL: http://api.solvecaptcha.com/in.php providing coordinatescaptcha parameter set to 1.
  Server accepts images in multipart or base64 format.

  You can provide an instruction as text using textinstructions parameter, but it's not obligatory if the instruction is already indicated on the image.

  The full list of parameters is in the table below.

• Server will return captcha ID or an error code if something gone wrong.

• Make a 5 seconds timeout and submit a HTTP GET request to our API URL: http://api.solvecaptcha.com/res.php to get the result.

  If captha is already solved server will return the answer with coordinates of points where you have to click, for example: OK|coordinate:x=39,y=59;x=252,y=72. Where the point with x=0,y=0 is the upper left corner of the image.

  If captcha is not solved yet server will return CAPCHA_NOT_READY result. Retry your request after 5 seconds.

  If something gone wrong server will return an error code.

• You simulate clicks on coordinates from the answer.

Multipart sample form for ClickCaptcha

<form method="post" action="http://api.solvecaptcha.com/in.php" enctype="multipart/form-data">
<input type="hidden" name="method" value="post">
<input type="hidden" name="coordinatescaptcha" value="1">
Your key:
<input type="text" name="key" value="YOUR_APIKEY">
ClickCaptcha file:
<input type="file" name="file">
Instruction:
<input type="text" name="textinstructions" value="Click on ghosts">
<input type="submit" value="Upload and get the ID">
</form>

YOUR_APIKEY is Your API key.

Base64 sample form for ClickCaptcha

<form method="post" action="http://api.solvecaptcha.com/in.php">
<input type="hidden" name="method" value="base64">
<input type="hidden" name="coordinatescaptcha" value="1">
Your key:
<input type="text" name="key" value="YOUR_APIKEY">
ClickCaptcha file body in base64 format:
<textarea name="body">BASE64_CLICKCAPTCHA_FILE</textarea>
Instruction
<input type="text" name="textinstructions" value="Click on ghosts">
<input type="submit" value="Upload and get the ID">
</form>

YOUR_APIKEY is your API key.

BASE64_CLICKCAPTCHA_FILE is base64-encoded image body of ClickCaptcha.

List of POST request parameters for http://api.solvecaptcha.com/in.php

List of GET request parameters for http://api.solvecaptcha.com/res.php

Request URL example:

http://api.solvecaptcha.com/res.php?key=1abc234de56fab7c89012d34e56fa7b8&action=get&id=2122988149

RotateCaptcha

RotateCaptcha is a type of captcha where you have to rotate images to solve it. The most popular is FunCaptcha.

To solve RotateCaptcha you have to:

• Get an image or several images that should be rotated.

• Optionally: determine the angle for one rotation step and provide it as a value for angle parameter.
  If not defined we'll use the default value for FunCaptcha: 40 degrees.

  The full list of parameters is in the table below.

• Submit images to our server with HTTP POST request to our API URL: http://api.solvecaptcha.com/in.php setting method parameter to rotatecaptcha. Server accepts images only in multipart format.

  Server will return captcha ID or an error code if something gone wrong.

• Make a 5 seconds timeout and submit a HTTP GET request to our API URL: http://api.solvecaptcha.com/res.php to get the result.

  If captha is already solved server will return the answer with angles for each image like: OK|40|200|-120.
  Positive values mean that images should be rotated clockwise.
  Negative values mean that images should be rotated counter-clockwise.

  If captcha is not solved yet server will return CAPCHA_NOT_READY result. Retry your request after 5 seconds.
  If something gone wrong server will return an error code.

• Rotate images to given angles to solve your RotateCaptcha.

Sample form for RotateCaptcha

<form method="post" action="http://api.solvecaptcha.com/in.php" enctype="multipart/form-data">
KEY:<br>
<input  name="key" value="YOUR_APIKEY"><br>
Type<br>
<input  name="method" value="rotatecaptcha"><br>
Angle<br>
<input  name="angle" value="40"><br>
Files:<br>
<input type="file" name="file_1"><br>
<input type="file" name="file_2"><br>
<input type="file" name="file_3"><br>
<input type="submit" value="Upload and get the ID">
</form>

YOUR_APIKEY is your API key.

List of POST request parameters for http://api.solvecaptcha.com/in.php

List of GET request parameters for http://api.solvecaptcha.com/res.php

Request URL example:

http://api.solvecaptcha.com/res.php?key=1abc234de56fab7c89012d34e56fa7b8&action=get&id=2122988149

FunCaptcha Token Method

Now we provide a method to solve FunCaptcha with a token.

The method is pretty simple:

• You need to locate public key of FunCaptcha. There are two ways to find it: you can locate funcaptcha's div element and check the value of data-pkey parameter parameter or you can find the input element with name fc-token and then extract the key indicated after pk from the value of this element.

• Submit a HTTP GET or POST request to our API URL: http://api.solvecaptcha.com/in.php with method set to funcaptcha and provide the value found on previous step as value for publickey and full page URL as value for pageurl. Sending proxies is not obligatory ar the moment but it's recommended.
  You can find the full list of parameters in the table below.

  Request URL example:

  https://api.solvecaptcha.com/in.php?key=1abc234de56fab7c89012d34e56fa7b8&method=funcaptcha&publickey=12AB34CD-56F7-AB8C-9D01-2EF3456789A0&pageurl=http://mysite.com/page/with/funcaptcha/

• If everything is fine server will return the ID of your captcha as plain text, like: OK|2122988149 or as JSON {"status":1,"request":"2122988149"} if json parameter was used.
  Otherwise server will return an error code.

• Make a 10-20 seconds timeout then submit a HTTP GET request to our API URL: http://api.solvecaptcha.com/res.php to get the result.
  The full list of parameters is in the table below.

  If captha is already solved server will respond in plain text or JSON and return the answer token that looks like:

  3084f4a302b176cd7.96368058|r=ap-southeast-1|guitextcolor=%23FDD531|metabgclr=%23FFFFFF|metaiconclr=%23202122|meta=3|lang=en|pk=12AB34CD-56F7-AB8C-9D01-2EF3456789A0|cdn_url=https://cdn.funcaptcha.com/fc|surl=https://funcaptcha.com

  If captcha is not solved yet server will return CAPCHA_NOT_READY result. Retry your request after 5 seconds.
  

  If something gone wrong server will return an error code.

• Locate the element with id fc-token and put the token into value of this element.

  Please note: if you use nojs=1 parameter API will return just first part of token string like this: 3084f4a302b176cd7.96368058|r=ap-southeast-1 and you got to build the full string using the original value of fc-token

• Do the rest what you need to do on the website: submit a form or click on a button or something else.

List of GET/POST request parameters for http://api.solvecaptcha.com/in.php

List of GET request parameters for http://api.solvecaptcha.com/res.php

Request URL example:

http://api.solvecaptcha.com/res.php?key=1abc234de56fab7c89012d34e56fa7b8&action=get&id=2122988149

KeyCaptcha

KeyCaptcha is a type of captcha where you have to solve a simple puzzle.

To solve KeyCaptcha with our service you have to:

• Find the following KeyCaptcha parameters in page's source code:

  s_s_c_user_id
  s_s_c_session_id
  s_s_c_web_server_sign
  s_s_c_web_server_sign2

• Submit a HTTP GET or POST request to our API URL: http://api.solvecaptcha.com/in.php with method set to keycaptcha and provide values found on previous step in your request as values for corresponding request parameters and also full page URL as value for pageurl.
  You can find the full list of parameters in the table below.

  Request URL example:

   http://api.solvecaptcha.com/in.php?key=1abc234de56fab7c89012d34e56fa7b8&s_s_c_user_id=10&s_s_c_session_id=493e52c37c10c2bcdf4a00cbc9ccd1e8&s_s_c_web_server_sign=9006dc725760858e4c0715b835472f22-pz-&s_s_c_web_server_sign2=2ca3abe86d90c6142d5571db98af6714&method=keycaptcha&pageurl=https://www.keycaptcha.ru/demo-magnetic/

• If everything is fine server will return the ID of your captcha as plain text, like: OK|2122988149 or as JSON {"status":1,"request":"2122988149"} if json parameter was used.
  Otherwise server will return an error code.

• Make a 15-20 seconds timeout then submit a HTTP GET request to our API URL: http://api.solvecaptcha.com/res.php to get the result.
  The full list of parameters is in the table below.

  If captha is already solved server will respond in plain text or JSON and return the answer that looks like:

  ebdb5a6bf76da6887db60ef2041ab946|9006dc725760858e4c0715b835472f22|http://back10.keycaptcha.com/swfs/ckc/5bded85426de3c57a7529a84bd0d4d08-|493e52c37c10c2bcdf4a00cbc9ccd1e8|1

  If captcha is not solved yet server will return CAPCHA_NOT_READY result. Retry your request after 5 seconds.
  

  If something gone wrong server will return an error code.

• Locate and delete the following block which inclides keycaptcha javascript file:

  <script language="JavaScript" src="http://backs.keycaptcha.com/swfs/cap.js"></script>

  Locate and delete the div with id="div_for_keycaptcha":

  <div id="div_for_keycaptcha"...>...</div>

  Please note: sometimes content on the page is generated dynamically and you will not see these elements in html source or they can differ a little bit.
  In such cases you have to explore the source of the page and javascript code that generates the content. "Inspect" option in Google Chrome can help in that.

• Locate the element with id="capcode" and change it's value to the response received from our server.

  <input name="capcode" id="capcode" value="1|2|3|4|5" type="hidden">

• Click on submit button.

• Congratulations, you've passed KeyCaptcha

  All these tasks can be easily automated. Check the example of JavaScript code that can do that right in browser's console.

Multipart sample form for KeyCaptcha

<form method="post" action="http://api.solvecaptcha.com/in.php" enctype="multipart/form-data">
Your API-KEY from solvecaptcha.com:
<input  name="key" value="YOUR_APIKEY"><br>
s_s_c_user_id:<br>
<input  name="s_s_c_user_id" value=""><br>
s_s_c_session_id:<br>
<input  name="s_s_c_session_id" value=""><br>
s_s_c_web_server_sign:<br>
<input  name="s_s_c_web_server_sign" value=""><br>
s_s_c_web_server_sign2:<br>
<input  name="s_s_c_web_server_sign2" value=""><br>
pageurl:<br>
<input  name="pageurl" value=""><br>
It's keycaptcha:<br>
<input type="text" value="keycaptcha" name="method"><br>
<input type="submit" value="UPLOAD AND GET ID">
</form>

YOUR_APIKEY is Your API key.

List of GET/POST request parameters for http://api.solvecaptcha.com/in.php

List of GET request parameters for http://api.solvecaptcha.com/res.php

Request URL example:

http://api.solvecaptcha.com/res.php?key=1abc234de56fab7c89012d34e56fa7b8&action=get&id=2122988149

Error Handling

It's very important to use proper error handling in your code to avoid suspension of your account and service interruption.

Normally if something is wrong with your request server will return an error.
Below you can find tables with lists of errors with description:

• errors returned by http://api.solvecaptcha.com/in.php

• errors returned by http://api.solvecaptcha.com/res.php

Errors can be returned as plain text or as JSON if you provided json=1 parameter.

In very rare cases server can return an HTML page with error text like 500 or 502 - please keep it in mind and handle such cases correctly.
If you received anything that doesn't looks like the answer or error code - make a 5 seconds timeout and then retry your request.

List of in.php errors

List of res.php errors

Request limits

Please remember and understand that each your request to our API generates multuple requests to our databases. That's why we ask to set proper timeouts for your requests and use proper error handling for cases when server returns an error (error message, http error or html page with error).

For example:

• If server returns ERROR_NO_SLOT_AVAILABLE make a 5 seconds timeout before sending next request.
• If server returns ERROR_ZERO_BALANCE set the timeout to 60 seconds.
• After uploading a captcha wait a least 5 seconds (10-20 for recaptcha) and only then try to get the answer.
• If captcha is not solved yet - retry to get the answer after 5 seconds.

If your timeouts are configured incorrectly your account or IP address will be temporary blocked and server will return an error. See the list of error codes in the table below.

Error codes list for request limitations

Using proxies

Proxies can be used to solve ReCaptcha V2 and FunCaptcha from the same IP address as you load the page.
Using proxies is not obligatory at the moment but in future algorithms of ReCaptcha and FunCaptcha can be changed and it will be required.
And even now some websites check IP address used for solving ReCaptcha V2. So we recommend you to be ready for these changes.

If you send us the proxy, we check it's availability trying to open the website through you proxy, and if we can't do that we will not use your proxy.
If we're able to use your proxy - we'll load the ReCaptcha through it for solving.

We don't have our own proxy servers that we can offer to you so you have to use 3rd-party services or setup your own proxy.

We support the following proxy types: SOCKS4, SOCKS5, HTTP, HTTPS with authentication by IP address or login and password.

If your proxy uses IP authentication you have to add our IP addresses to the list of allowed IPs of the proxy:
138.201.188.166

Then provide your proxy IP address and port as a value for proxy parameter.
And the type of your proxy as a value for proxytype parameter.

If your proxy uses login/password authentication you have to include your credentials in proxy parameter.

POST parameters for proxies

Pingback (callback)

We provide a pingback (callback) option that allows you to get the answer for your captcha automatically when it's ready.
It allows you to get answers without making requests to http://api.solvecaptcha.com/res.php and also allows you to avoid account suspension.

To receive automated callback you have to:

• Register your callback URL.
• Provide your callback URL as value for pingback parameter of your request to http://api.solvecaptcha.com/in.php.
• Process HTTP POST request coming from our server to your callback URL. It contains captcha ID and the answer.

Manage pingback URLs

You can manage your pingback URLs making HTTP GET requests to http://api.solvecaptcha.com/res.php
Request parameters are described in the table below.

Important: pingback URL can be added only from the same IP address that your URL is pointing on.

List of GET request parameters for http://api.solvecaptcha.com/res.php

Request examples

Add pingback:

http://api.solvecaptcha.com/res.php?key=1abc234de56fab7c89012d34e56fa7b8&action=add_pingback&addr=http://mysite.com/test.php

List pingback URLs:

http://api.solvecaptcha.com/res.php?key=1abc234de56fab7c89012d34e56fa7b8&action=get_pingback&json=1

Delete all pingback URLs:

http://api.solvecaptcha.com/res.php?key=1abc234de56fab7c89012d34e56fa7b8&action=del_pingback&addr=all

Complain incorrectly solved captcha

If your captcha is solved incorrectly you can complain it sending a HTTP GET request to http://api.solvecaptcha.com/res.php with action parameter set to reportbad and ID of incorrectly solved captha.
Our moderators will check your captcha and worker's answer and decide was the answer correct or not.

If moderator decides that anwers is incorrect we'll return money to your balance.

Your reports also help us to ban workers that are making too many mistakes.

Important: don't try to report correctly solved captchas. If you will do that your account will be banned.
Please understand that moderators are humans too and they can make a mistake, don't contact us if moderator marked few incorrect answers as correct.

List of GET request parameters for http://api.solvecaptcha.com/res.php

Server will return OK_REPORT_RECORDED response to your request. Or an error code if something gone wrong.

If you're getting too many incorrectly solved captchas you may provide additional parameters with your captcha to help wokers to solve it correctly

Additional methods

You can also get some additional information with our API, like balance, current rate, etc.
Please check available parameters in the table below.

List of GET request parameters for http://api.solvecaptcha.com/res.php

Code Examples

You can find code examples in our GitHub repo

Also you can check examples kindly provided by our users:

• C# Example for ReCaptcha V2 new method
• Perl Example for Normal Captcha by Fayland Lam
• JavaScript Example for Normal Captcha by Sander-Kastelein
• Tampermonkey/Greasemonkey Example for Normal Captcha by Makeshift
• Python Example for Normal Captcha by Mirio
• PHP Yii2 Example for Normal Captcha by jumper423
• Autoit script for Normal Captcha
• GO Example for Normal Captcha by LeoCBS

And also we have an iMacros form

Sandbox

We provide Sandbox mode that allows you to see and solve your captchas by yourself.
You can enable Sandbox mode in your settings

Important: please note that captchas sent in Sandbox mode are also charged.

When Sandbox mode is enabled your captchas will not be distributed to wokers and you will see them in Workers Interface

Important: It's not possible to use SandBox mode for ReCaptcha V2.

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