Fuzzer Python Packages

dirsearch

Web path scanner

grammarinator

ANTLR v4 grammar-based test generator

byron

An evolutionary source-code fuzzer

protofuzz

Google Protocol Buffers message generator

fuzzingtool

Software for fuzzing, used on web application pentestings.

dharma

Generation-based, context-free grammar fuzzer. Refer to https://github.com/posidron/dharma for a maintained version.

apifuzzer

Fuzz test your application using your OpenAPI or Swagger API definition without coding

evomaster

The first open-source AI-driven tool for automatically generating system-level test cases (also known as fuzzing) for web/enterprise applications. Currently targeting whitebox and blackbox testing of Web APIs, like REST, GraphQL and RPC (e.g., gRPC and Thrift).

mcpsec

An AI-driven dynamic protocol fuzzer for the Model Context Protocol (MCP). Prove runtime exploitability by discovering state violations, transport crashes, and application-layer logic flaws (SSRF, LFI) before your AI agents do.

gramfuzz

gramfuzz is a grammar-based fuzzer that lets one define complex grammars to generate text and binary data formats.

pythonfuzz

coverage guided fuzz testing for python

frelatage

Coverage-based fuzzer for python applications

prompt-security-fuzzer

Make your GenAI Apps Safe & Secure :rocket: Test & harden your system prompt

mcp-fence

Local-first security scanner, MCP protocol inspector, dynamic fuzzer, Docker sandbox, and report generator for Model Context Protocol servers.

fuzzer-cov

fuzzer coverage tool, generate readable coverage report in html format

fuzza

Customizable TCP fuzzing tool to test for remote buffer overflows.

dharma-callback-fuzzer

Generation-based, context-free grammar fuzzer. Refer to https://github.com/posidron/dharma for a maintained version.

mseep-mcp-fence

Local-first security scanner, MCP protocol inspector, dynamic fuzzer, Docker sandbox, and report generator for Model Context Protocol servers.

fuzzyfuzzer

An other python web fuzzer

performancefuzzer

PerformanceFuzzer

hawkscan

Security Tool for Reconnaissance and Information Gathering on a website. (python 3.x)

pyjfuzz

PyJFuzz - Python JSON Fuzzer

nanofuzz-runtime

NaNofuzz is a fast and easy-to-use automatic test suite generator for TypeScript and Python that runs inside VS Code and supports fuzz, example, and property-based testing

casefold-fuzz

Prompt-injection evasion variant generator: expand any jailbreak string into casefold, homoglyph, invisible-char & spacing variants to stress-test your LLM guardrail. Pure-stdlib. Offensive counterpart to prompt-canon.