reSolver - CAPTCHA solver for Burp Suite

Automatically solve CAPTCHAs during web application security testing. Intercepts HTTP requests containing CAPTCHA placeholders, solves them via external providers, and injects the tokens — seamlessly integrating with Repeater, Intruder, and other Burp tools.

Features

• 8 CAPTCHA types: reCAPTCHA v2/v3 (incl. invisible & enterprise), hCaptcha, Cloudflare Turnstile, FunCaptcha, GeeTest v3/v4, AWS WAF
• 6 providers: 2Captcha, RuCaptcha, Anti-Captcha, CapMonster Cloud, CapSolver, SolveCaptcha
• Auto-Detection: passively scans HTTP responses for embedded CAPTCHAs and generates ready-to-use placeholders
• Smart failover: priority-based provider selection with circuit breaker
• Statistics: per-provider success rates, solve times, and balance tracking

Getting Started

Requirements: Burp Suite 2024.x+, Java 21+, account with a supported CAPTCHA solving provider.

1. Download the JAR from GitHub Releases
2. In Burp Suite: Extensions > Installed > Add > select the JAR
3. Go to the Services tab, enter your API key(s), and enable providers

Usage

Placeholder Format

Insert placeholders into HTTP requests — reSolver will replace them with solved tokens:

{{CAPTCHA[:]TYPE[:]SITEKEY[:]URL[:][OPTIONAL_PARAMS]}}

The [:] separator avoids conflicts with colons in URLs and site keys.

CAPTCHA Types

| Type | Code | Optional Parameters | |------|------|-------------------| | reCAPTCHA v2 | recaptchav2 | invisible, enterprise, timeout_seconds | | reCAPTCHA v3 | recaptchav3 | action, min_score, enterprise, timeout_seconds | | hCaptcha | hcaptcha | timeout_seconds | | Cloudflare Turnstile | turnstile | timeout_seconds | | FunCaptcha | funcaptcha | timeout_seconds | | GeeTest v3 | geetest | timeout_seconds | | GeeTest v4 | geetestv4 | timeout_seconds | | AWS WAF | awswaf | timeout_seconds |

Examples

{{CAPTCHA[:]recaptchav2[:]6LfD3PIbAAAAAJs_eEHvoOl75_83eXSqpPSRFJ_u[:]https://example.com}}
{{CAPTCHA[:]recaptchav2[:]6LfD3PIb...[:]https://example.com[:]invisible,enterprise}}
{{CAPTCHA[:]recaptchav3[:]6LcW00EU...[:]https://example.com[:]action=login,min_score=0.7}}
{{CAPTCHA[:]hcaptcha[:]a1b2c3d4-e5f6...[:]https://example.com}}
{{CAPTCHA[:]turnstile[:]0x4AAAAAAA...[:]https://example.com}}

Auto-Detection

As you browse, reSolver automatically detects CAPTCHAs in HTTP responses. Check the Detections tab — click Copy Placeholder and paste it into your request.

Building from Source

git clone https://github.com/TheQmaks/reSolver.git
cd reSolver
./gradlew build

The JAR will be in build/libs/.

Contributing

1. Fork the repo
2. Create a feature branch (git checkout -b feature/my-feature)
3. Commit and push your changes
4. Open a Pull Request

License

MIT