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The high-signal parameter discovery tool. Finds target-specific, production-used parameters from 10+ years of Wayback data.

Project description

🕵‍♂ paramspy: Smart Parameter Discovery Tool

Stop Brute-Forcing Noise. Start Spying on Targets.

Version Python License Status
PyPI Python Version License: MIT Ready for Bug Bounty

paramspy is an ultra-fast, high-signal reconnaissance tool that automates the discovery of hidden and target-specific parameters by analyzing 10+ years of Wayback Machine data. It bypasses the time-wasting process of running massive, generic wordlists, providing you with a clean, actionable list of production-used parameters in seconds.


✨ Why paramspy is a Game Changer

Traditional parameter discovery methods suffer from a low signal-to-noise ratio, wasting time and often missing unique bugs.

Feature Generic Wordlists (e.g., 60k lines) paramspy (Targeted ~200-800 lines)
Source Data Random, common junk Target-specific Wayback URLs (10+ years)
Signal-to-Noise Low (Drowning in false positives) High (Real, validated production parameters)
Time Saved Minimal (Slow brute-force) Saves 15–45 minutes per target
Killer Feature None Seamless Gf-pattern integration
Performance Slow Instant (Uses cache and clean list)

⚡ Installation

paramspy is available on PyPI and supports Python 3.9+.

# 1. Install the package
pip install paramspy

# 2. Recommended: Ensure you have a fuzzer (like ffuf) and gf installed
# go install [github.com/ffuf/ffuf@latest](https://github.com/ffuf/ffuf@latest)
# go install [github.com/tomnomnom/gf@latest](https://github.com/tomnomnom/gf@latest)

📖 Usage & Examples

  1. Basic Scan & Piping The default mode outputs a clean list directly to stdout, perfect for piping into your favorite fuzzing tools.
# Get the high-signal parameter list for the target
paramspy shopify.com

# Pipe the clean list directly into ffuf
paramspy tesla.com | ffuf -u "[https://tesla.com/v1/api/FUZZ](https://tesla.com/v1/api/FUZZ)" -w - -mc 200

# Pipe the clean list into arjun
paramspy example.com > params.txt
arjun -u [https://example.com](https://example.com) -i params.txt
  1. The Killer Feature: Gf-Pattern Tagging (JSON Output) Use the --output json flag to get a structured output, and then use jq to filter parameters tagged for specific vulnerability classes (like redirect or xss).
# 1. Run scan and get structured JSON output
paramspy target.com --output json > results.json

# 2. Use jq to extract only parameters related to redirects (HIGH PRIORITY!)
# This is equivalent to running 'gf redirect' but on a target-specific wordlist.
cat results.json | jq '.parameters[] | select(.tags[] | contains("redirect")) | .param' -r

# Example Output (Gold for Open Redirects/SSRF)
# redirect_uri
# return_to
# callback
# next
  1. Cache Management paramspy uses a local SQLite cache (~/.paramspy/cache/) to make repeated scans instant.
# Check status of all cached domains
paramspy cache status

# Clear the cache for a specific domain
paramspy cache clear tesla.com

# Clear the entire cache
paramspy cache clear

⚙️ Core Technology

  • Asynchronous Fetching: Uses httpx for fast, concurrent fetching from the Wayback CDX API.

  • Intelligent Parsing: Robust regex and urllib.parse handle standard, matrix, and encoded parameters.

  • Reliable CLI: Built with Typer and provides beautiful terminal output and progress bars via Rich.

  • Production Caching: Uses SQLite for performance, integrity, and simple TTL management.


🤝 Contribution

We welcome contributions! The most valuable contribution is expanding the high-signal built-in wordlist (paramspy/data/builtin_params.json). If you found a unique, non-generic parameter that led to a successful bug bounty submission, please open a Pull Request to add it!

  1. Fork the repository.
  2. Create your feature branch (git checkout -b feature/new-parser).
  3. Commit your changes (git commit -am 'Feat: Add new regex for complex URLs').
  4. Push to the branch (git push origin feature/new-parser).
  5. Create a new Pull Request.

📜 License

Distributed under the MIT License. See LICENSE for more information.

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