Stop Writing Your Own Python Parsers! Use This Free API Instead 🛑

Source: Dev.to

TL;DR

Stop wasting time writing complex AST logic. Use the Prometheus Text & Code Toolkit API to analyze Python code complexity and structure in milliseconds. It’s free for developers (500 calls/month).

Why Write Your Own Parsers?

As Python developers, we often need tools that analyze code for purposes such as:

• Student grading systems 🎓
• Code quality checkers ✅
• Custom linters 🧹

The standard approach—importing ast, visiting nodes, handling recursion, and dealing with edge cases—is painful and time‑consuming.

Introducing Prometheus Text & Code Toolkit

A serverless API that does the heavy lifting for you.

Features

• Code Analysis – Instantly obtain cyclomatic complexity, function counts, classes, and imports from raw Python code.
• Text Tools – Extract keywords, calculate reading time (e.g., for blog posts), and generate slugs.

Best part: Completely FREE for developers (500 calls/month).

How to Use

1. Go to RapidAPI – Prometheus Toolkit and subscribe to the Basic Plan (Free).
2. Send a POST request with your code and language.

import requests

url = "https://prometheus-text-and-code-toolkit.p.rapidapi.com/api/explain"

# The code you want to analyze
my_code = """
def complex_function():
    if True:
        for i in range(10):
            print(i)
"""

payload = {
    "code": my_code,
    "language": "python"
}

headers = {
    "x-rapidapi-key": "YOUR_API_KEY_HERE",
    "x-rapidapi-host": "prometheus-text-and-code-toolkit.p.rapidapi.com",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

# 👇 Use this to fail a CI/CD pipeline if code is too messy!
print(response.json())

Sample Response

{
  "functions": [
    {
      "name": "complex_function",
      "lineno": 1,
      "args": []
    }
  ],
  "complexity": 3,
  "classes": [],
  "imports": []
}

Benefits

• Privacy First – The static analysis engine processes code in RAM and discards it instantly; no storage is retained.
• Zero Dependencies – No need to install heavy libraries locally.
• Fast – Built on Vercel Edge functions for low latency.

Get Started

👉 Try it now: Prometheus Toolkit on RapidAPI

If you find this useful, feel free to leave a comment or a ❤️!