How to Identify and Solve reCAPTCHA v2 Invisible Using CapSolver

reCAPTCHA v2 Invisible is widely implemented to block automated access, form submissions, and scraping activities. To solve this type correctly, you must first identify the exact reCAPTCHA version, extract its parameters, and send accurate data to CapSolver.

This guide provides an expanded and structured walkthrough, including:

• How to identify the correct reCAPTCHA version
• How to extract parameters with 100% accuracy
• How to build and send the CapSolver task
• How to retrieve and validate results
• Best practices and troubleshooting
• Frequently asked questions
• Conclusion and next steps
• Bonus code for additional credits

All methods described should be used responsibly and only for legal and compliant scenarios, such as QA testing, automation workflows, accessibility integrations, or stable access to publicly available information.

1. How to Identify reCAPTCHA v2 Invisible and Retrieve Parameters

Correctly identifying the reCAPTCHA version is crucial. Each version—v2 Checkbox, v2 Invisible, v3 Score—requires a different CapSolver task type. Using the wrong type results in invalid tokens and failures.

Identify Using the CapSolver Browser Extension

CapSolver provides a browser extension that automatically:

• Detects the reCAPTCHA version
• Extracts all related parameters
• Generates a ready-to-use CapSolver JSON
• Ensures 100% accurate identification

Example interface:

Full documentation:
Instruction Manual for reCAPTCHA Identification Extension

The generated CapSolver JSON will look like this:

2. Solving reCAPTCHA v2 Invisible with CapSolver

Once you have the correct parameters, you can initiate a solving task.
A typical request looks like:

POST https://api.capsolver.com/createTask
Host: api.capsolver.com
Content-Type: application/json
{
    "clientKey": "YOUR_API_KEY",
    "task": {
        "type": "ReCaptchaV2TaskProxyLess",
        "websiteURL": "https://example.com",
        "websiteKey": "6LcR_okUAAAAAPYrPe-HK_0RULO1aZM15ENyM-Mf",
        "anchor": "value",
        "reload": "value",
        "isInvisible": true
    }
}

Recommended Workflow

1. Start with ReCaptchaV2TaskProxyLess.
2. If the token fails due to environment/IP mismatch, switch to ReCaptchaV2Task and include your proxy.

This ensures maximum compatibility.

3. Retrieve the Solution Token

After creating the task, retrieve the result with:

POST https://api.capsolver.com/getTaskResult
Host: api.capsolver.com
Content-Type: application/json
{
    "clientKey":"YOUR_API_KEY",
    "taskId": "37223a89-06ed-442c-a0b8-22067b79c5b4"
}

If the token does not work, contact CapSolver support for diagnostics.
They can help identify parameter issues or advise proxy usage.

4. Best Practices & Additional Tips

Capture All Hidden Parameters

Invisible reCAPTCHA often uses hidden callback fields such as:

• anchor
• reload
• Action tokens
• Callback function names

Missing these results in invalid tokens.

Avoid Token Reuse

Each token is designed for:

• one-time use
• a specific action
• a short expiration window

Always request a new token for each attempt.

Match the Environment

Ensure the following match between token generation and usage:

• User-Agent
• IP Address
• Browser fingerprint
• Device type

Mismatch can cause reCAPTCHA to reject the token.

Prefer Proxyless First

Many websites accept Proxyless solving unless they enforce strict IP rules.

5. Frequently Asked Questions (FAQ)

1. How do I know if the reCAPTCHA is invisible?

Invisible reCAPTCHA does not show a checkbox. It triggers automatically when submitting a form.
The CapSolver extension will label it clearly as reCAPTCHA v2 Invisible.

2. Why does my token fail even after solving successfully?

Common reasons include:

• Missing anchor or reload parameters
• Changing User-Agent after token retrieval
• IP mismatch when using Proxyless
• Using an expired token
• CSRF or session-related issues on the target website

3. Should I use Proxyless or Proxy mode?

Start with Proxyless.
Use proxy mode only if the target site ties verification to IP-based trust.

4. Can I solve Invisible reCAPTCHA automatically without user interaction?

Yes. CapSolver handles the interaction simulation and returns a g-recaptcha-response token ready for submission.

5. Why do I see “sitekey is invalid” errors?

This usually occurs when:

• The wrong version of reCAPTCHA is used
• The sitekey belongs to a different domain
• The parameters were not captured correctly

Use the CapSolver browser extension for guaranteed accuracy.

6. Conclusion

Successfully solving reCAPTCHA v2 Invisible requires accurate identification, correct parameter extraction, and proper task configuration. With CapSolver’s browser extension, API, and proxy options, you can efficiently automate this process while maintaining high success rates and compatibility.

By following the steps and best practices in this guide, you can ensure reliable and stable solving for legal automation scenarios such as testing, workflow optimization, and accessing publicly available information.

If issues persist, CapSolver’s support team is available to assist with diagnostics and fine-tuning.

7. Bonus: Redeem Your CapSolver Bonus Code

Receive an additional balance bonus when topping up your CapSolver account.

Bonus Code: CAPN
Reward: Additional 5% bonus on every recharge
Limit: No usage limits

Redeem here:
CapSolver Dashboard