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This article will introduce a Recaptcha3 protocol recognition API integration instruction, which allows users to complete verification without recognizing and clicking on Recaptcha3 verification images, simply by submitting the Website Key for automatic decoding in the background.

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Application Process

To use the API, you need to first apply for the corresponding service on the Recaptcha3 Protocol Recognition API page. After entering the page, click the “Acquire” button, as shown in the image below: If you are not logged in or registered, you will be automatically redirected to the login page inviting you to register and log in. After logging in or registering, you will be automatically returned to the current page. There will be a free quota granted upon the first application, allowing you to use the API for free.

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Basic Usage

First, understand the basic usage method. Compared to Recaptcha2, we need to pass an additional parameter page_action, which needs to be obtained from the code. The demo URL for this display is: https://recaptcha-demo.appspot.com/recaptcha-v3-request-scores.php. Below is a method to obtain it:

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Quick Method:

Open F12, then search for .execute( in the Elements page. In the red box area, we can see the action parameter, and there is also a string following execute, which is the content needed later, as shown in the image below.

Next, you need to input the URL of the website that requires captcha processing to obtain the processed result. First, you need to simply pass a website_url field, and finally, you need to input the website_key parameter, which can be obtained from the above text, also a string following execute. We can then fill in the corresponding content on the interface, as shown in the image below:

Here we can see that we have set the Request Headers, including:
  • accept: the format of the response result you want to receive, filled in as application/json, which is JSON format.
  • authorization: the key for calling the API, which can be directly selected after application.
Additionally, the Request Body is set, including:
  • page_action: needs to be obtained from the website code where the captcha is located.
  • website_url: the URL of the website that requires captcha processing.
  • website_key: the website key identifier in Recaptcha3.
After selection, you can find that the corresponding code is also generated on the right side, as shown in the image below:

Click the “Try” button to test, as shown in the image above, and we have obtained the following result: 
{
  "token": "03AFcWeA5mfdNlQD0RGX9PTWPs0l65QukjwbYObCue5hygRuA6jJmBtwR98S2bmmZOjbLh7ogEMDd8NzJdq8DoHOD_LHIUWmdEL3HJS0pP2nmTTSoU_ltxORWA4sVsrWiXDgkARA4wAhJCegD6PftkRuu0KKbqRsJ7KVKukUbLU1ThBu7P3r0fybwpS11yQmF7xpbEZeFzRm_osERk9tQzs1lEYORZSVA5dimbWi42TqUC87mJHCKO0HMiU404LOyER84It7ne51V5YXEHR_o6-ORr2CmBOawdTDTsqWUwT8vyEvzy-ov-pZdl0B0A_U59_uZd7vbIwv937-iXyzkVWbakUXNMdXlHffpFYd7OLTSBhJu6nasV3IhrbnxO8eGIbPDoHIyGpA74D882ALwTnXMgkcmGeGM9YuqCrf7F06cNKY7yKiisZIU-7v3ZnHV3JUkODGpXQ6dwq2fuP5o6kgeUQVdkv4fAZ_Tx_TB_R6gPSgwulr8Q5hH34bs-v1oUl2S9mLhXT9SWvgYizU_4FN2Ou23ETXTAVD_uI9fWaDgKaLOKI1i-xHCF_LKU3wKjyYJfQhFSCSyoeGL4o1j9lZ27cEHL5AlCm_jcCiXhe2_LT_dI-r5ozuyOGv-iDZ_1XTSSnCGdmroXX56XsZAytU52zBAlYVe_aRAojruc9KdkhK4kdeBESBbDLVe3-jNFwYspe0R93SORxXXIqR9CtZrIjI_2U8XjCHFz_euChdU_wkH5BjvONVbUT1DQNuoo0ugJL5kUkFrubHppOKvoZMwIKjjK_ZX1NBeCvQvYm6IpwBWfvM4hjGI7UVXH3iZkrX9PLATIIIkA8PxTeN45k8DulzOhKLSFKK196fRlH83S8UAaM-vjBxf32Vg83C1gWzKB5sYhxqEtZeB7DNpmAkozFfubljURr7YTjtq8Bgnj0PkfzbgKk8FRl-hMUb9BUjNNuSuFC7GZVim6xQnIV9ZPaAcuzJTYcOizFJePbVEXlc9A5Vq2rDh3D7Ld5o5oqc2kK4eCrO_38le6EVTs_fRY2nXy6RMyjjaJN12lOKYwYzGKhm52gTZTrJXqeTAW8o2KfwZ9iek-tr5qxj5b40iY4V2PY6SflMQvmKLAgFhB-yo-o5PEkikQ98T-bE-wG2-3kd5NRMiD132kIhf48zhVJUGeJqdV_3m8ukyqTk26KisM12kN-h9uYefvUCxzd_mBuWlHzH9rFMlJSe8Z6lcZIVcqNF4fcEM-ukNnwMUK5H_SC48U7O_xfOaEqEpAHDC7CCyVwlGCFh0uAT8KSpaNFfxBmMPXeYrGYn83PCgMg1NZA-7PrpeidXmWdBZ2yY8MA__7uCe8clCmINseBTCIbNmAHPlI_zJKqQfhXaDbaELeD62P0Pquu_SBtdEtqPeB9Esn_yjbK3IFvAaGSnFhwhHHK8dpOI7v-rJvTigPu8MMrEUTvug_zog81kCG8HY3xorTj2OdTwdEYpeMJ1VIHSjdTcnepLB0Cffx5wAdk-gf1TGEnEyTiwII4A4vtq8r0LFK4YObOzNmBTl3IoTNheYYKpheTKH3KShMK6hXDKxDRGEUhdsW4TRtVT-dwJDqY_F7J1RwKP-xDuN98VgwQmQuhJteQUALevgI2jAGFCFfSeFbQ8BOT6ekEI0m30zDX0kh83mkE7-u9qKljYifjqbLarMNPP51QRbvAS3mHlP17PMhIKzjuIka4T2Y9XdRwDgRRdEkYiJgDvkcABTknGBMezraon8JNDRhIJMUIKpidWTdhEQ79qAEfZkowdbnTdKeWeayi1OmV_W4aox-aC62H-VIn70McXXB6zRyYlA2NvTUWgNhHWkSO1SW7uflNEyUeWFRLBZV_firMEVfIGirHOAbQqsn83BirDNPHl4xevf4nRu4gWpgOGBrzeUXQeuMWO4ZFsdWxJ2VsT19t0H5DJtxtHYXFtPZ8tFDFY-r8JKFab4S6e5v8PCrfjCWkPmDaRJal_vLFa1V1dF1l0ARu9NLW4mEuT600azFms8cMlvuCTvWI2VWyn4Wk05UvcR8FYO2-ke4E-ZFRl0jSxjlEutzbOwm2ik4eF0Wh2DBliaSr1obHaxkmLJDUIzGQ3wi49Nyn0SSOdz_BGaxuRrrxCZ4ci0e2b5cxLtkv64Njy7IYJURaBuQk99ijdw7rg3pssAa_uJSMQeZe_kLtgEWF73uT4ceSOFPVuxMGLrJRQTBYxAHVKq7kloS5wtphUr2Sp-b4kezKnCV9HNfC5NRk2KqDT-bkJ6cUYN_0yauyZK1_F4BVTk36IOCe1Cqfe3K-wAZBzvrI_Vz8Li1uEWe0b5KOQ"
}
The return result has multiple fields, described as follows:
  • token, the verification result after processing the Recaptcha3 captcha task.
As we can see, we have obtained the verification result for processing the Recaptcha3 captcha, which we can use for POST or GET to simulate submission to the target website, valid for 120 seconds, and it is recommended to use it within 60 seconds. Below is a brief introduction to a way to submit the generated token to the target website: Call the corresponding Python version code for token verification: 
import requests

url = "https://recaptcha-demo.appspot.c/recaptcha-v3-verify.php?action=examples/v3scores&token='{token}'"

r = requests.get(url)
if r.status_code == 200:
    return r.text
Therefore, we can obtain the result: 
{
  "success": true,
  "hostname": "recaptcha-demo.appspot.com",
  "challenge_ts": "2024-09-14T08:52:26Z",
  "apk_package_name": null,
  "score": 0.9,
  "action": "examples/v3scores",
  "error-codes": []
}
As we can see, the success indicates the processing result of this verification, so we have successfully passed the Recaptcha3 captcha verification. Additionally, if you want to generate the corresponding integration code, you can directly copy the generated code, for example, the CURL code is as follows: 
curl -X POST 'https://api.acedata.cloud/captcha/token/recaptcha3' \
-H 'accept: application/json' \
-H 'authorization: Bearer {token}' \
-H 'content-type: application/json' \
-d '{
  "website_url": "https://recaptcha-demo.appspot.com/recaptcha-v3-request-scores.php",
  "website_key": "6LdKlZEpAAAAAAOQjzC2v_d36tWxCl6dWsozdSy9",
  "page_action": "examples/v3scores"
}'
The Python integration code is as follows: 
import requests

url = "https://api.acedata.cloud/captcha/token/recaptcha3"

headers = {
    "accept": "application/json",
    "authorization": "Bearer {token}",
    "content-type": "application/json"
}

payload = {
    "website_url": "https://recaptcha-demo.appspot.com/recaptcha-v3-request-scores.php",
    "website_key": "6LdKlZEpAAAAAAOQjzC2v_d36tWxCl6dWsozdSy9",
    "page_action": "examples/v3scores"
}

response = requests.post(url, json=payload, headers=headers)
print(response.text)

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Error Handling

When calling the API, if an error occurs, the API will return the corresponding error code and message. For example:
  • 400 token_mismatched: Bad request, possibly due to missing or invalid parameters.
  • 400 api_not_implemented: Bad request, possibly due to missing or invalid parameters.
  • 401 invalid_token: Unauthorized, invalid or missing authorization token.
  • 429 too_many_requests: Too many requests, you have exceeded the rate limit.
  • 500 api_error: Internal server error, something went wrong on the server.

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Error Response Example

{
  "success": false,
  "error": {
    "code": "api_error",
    "message": "fetch failed"
  },
  "trace_id": "2cf86e86-22a4-46e1-ac2f-032c0f2a4e89"
}

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Conclusion

Through this document, you have learned how to use the Recaptcha3 protocol recognition API to allow users to bypass recognizing and clicking on Recaptcha3 verification images, achieving automatic decoding in the background by simply submitting the Website Key. We hope this document helps you better integrate and use this API. If you have any questions, please feel free to contact our technical support team.