n8n + CaptchaAI: No-Code CAPTCHA Solving Workflow

n8n is an open-source workflow automation tool with native loop support, making it more flexible than Zapier for CAPTCHA solving. You can build a submit → poll → use workflow that retries automatically until the solve completes.

Workflow overview

Manual Trigger / Cron
    ↓
HTTP Request: Submit CAPTCHA
    ↓
Wait: 10 seconds
    ↓
Loop: Poll until solved
    ├── HTTP Request: Get result
    ├── IF: status == 1? → Exit loop
    └── Wait: 5 seconds → Loop again
    ↓
HTTP Request: Use token

Node 1: Submit CAPTCHA

Add an HTTP Request node:

Body parameters:

Response:

{
  "status": 1,
  "request": "71823456"
}

Node 2: Wait

Add a Wait node:

This gives the solver time to start processing before the first poll.

Node 3: Poll result (with loop)

n8n supports loops through the Loop Over Items node or by connecting an IF node's false output back to a previous node.

Option A: Simple IF loop

Add an HTTP Request node (Poll):

Connect it to an IF node:

• True output → Continue to the next action (use token)
• False output → Wait (5 seconds) → back to Poll node

Option B: Code node

For more control, use a Code node:

const apiKey = 'YOUR_API_KEY';
const taskId = $input.first().json.request;

for (let i = 0; i < 24; i++) {
  await new Promise(r => setTimeout(r, 5000));

  const resp = await fetch(
    `https://ocr.captchaai.com/res.php?key=${apiKey}&action=get&id=${taskId}&json=1`
  );
  const data = await resp.json();

  if (data.status === 1) {
    return [{ json: { token: data.request, taskId } }];
  }
  if (data.request !== 'CAPCHA_NOT_READY') {
    throw new Error(`CaptchaAI error: ${data.request}`);
  }
}

throw new Error(`Task ${taskId} timed out`);

Node 4: Use the token

Add another HTTP Request node to submit the form with the solved token:

Body parameters include your form data plus:

Storing the API key securely

Use n8n's Credentials system:

1. Go to Credentials → Add Credential → Header Auth
2. Name: CaptchaAI API Key
3. Store the key securely

Or use environment variables:

# In your n8n environment
export CAPTCHAAI_API_KEY="your_key_here"

Reference in nodes: {{ $env.CAPTCHAAI_API_KEY }}

Image CAPTCHA workflow

For image CAPTCHAs, adjust the Submit node:

To convert an image URL to base64 in n8n, add a Code node before the submit:

const imageUrl = $input.first().json.imageUrl;
const resp = await fetch(imageUrl);
const buffer = Buffer.from(await resp.arrayBuffer());
const base64 = buffer.toString('base64');

return [{ json: { imageBase64: base64 } }];

Balance check workflow

Create a separate workflow that runs on a schedule:

Cron (daily at 9 AM)
    ↓
HTTP Request: GET res.php?action=getbalance
    ↓
IF: balance < 5
    ↓
Slack / Email: "CaptchaAI balance low: $X.XX"

n8n vs Zapier for CAPTCHA solving

n8n is better for CAPTCHA workflows because of its loop support and Code nodes.

Troubleshooting

FAQ

Can I process multiple CAPTCHAs in one workflow?

Yes. Use the Split In Batches node to process multiple items, each with its own submit → poll → use flow.

Does n8n support Turnstile?

Yes. Change method to turnstile and use sitekey instead of googlekey.

Build CAPTCHA solving into your n8n workflows

Get your API key at captchaai.com.

Related guides

• Zapier + CaptchaAI: No-Code Automation
• CaptchaAI API Quickstart
• CaptchaAI Callback URL / Webhook Guide