[Feature Request]: Convert Python crawler configs to JSON API payloads

[eelcositeeffect]

What needs to be done?

Hi Crawl4AI team 👋

Thanks again for building such an awesome framework — it’s powerful and flexible.

One thing I often encounter is the gap between writing a working Python script and converting that logic into a JSON payload for the /crawl API. This comes up frequently when using Postman, curl, or orchestrators like n8n and Make.com.

---

✅ Use Case

Let’s say I have this working Python file:

import asyncio
import json
from urllib.parse import urljoin
from crawl4ai import AsyncWebCrawler, BrowserConfig, CrawlerRunConfig, JsonCssExtractionStrategy

async def main():
    url = "https://dominator.pl/en_BE/c/RS-125/25"
    browser_config = BrowserConfig(headless=True, verbose=True)

    css_schema = {
        "baseSelector": ".product",
        "fields": [
            {"name": "title", "selector": ".productname", "type": "text"},
            {"name": "price", "selector": ".price em", "type": "text"},
            {"name": "url", "selector": "a.f-grid-12.prodname", "type": "attribute", "attribute": "href"}
        ]
    }

    strategy = JsonCssExtractionStrategy(schema=css_schema)
    config = CrawlerRunConfig(extraction_strategy=strategy)
    
    async with AsyncWebCrawler(config=browser_config) as crawler:
        result = await crawler.arun(url=url, config=config)
        print(json.loads(result.extracted_content))

if __name__ == "__main__":
    asyncio.run(main())


### What problem does this solve?

Much easier to debug and test payloads in Postman / curl

Supports low-code/no-code environments like n8n, Make.com, Zapier

Reduces manual JSON conversion errors

Helps bridge LLM devs with ops/integration workflows



### Target users/beneficiaries

nocoders, beginner coders

### Current alternatives/workarounds

Use the python, try to use the code in playground

### Proposed approach

A utility function like this (assuming this is right):

```python

METHOD:
POST http://localhost:12344

HEADERS ( Key / Value)
    Content-Type: application/json
    Bearer <your token>

{
  "urls": ["https://dominator.pl/en_BE/c/RS-125/25"],
  "browser_config": {
    "type": "BrowserConfig",
    "params": {
      "headless": true,
      "verbose": true
    }
  },
  "crawler_config": {
    "type": "CrawlerRunConfig",
    "params": {
      "extraction_strategy": {
        "type": "JsonCssExtractionStrategy",
        "params": {
          "schema": {
            "baseSelector": ".product",
            "fields": [
              {
                "name": "title",
                "selector": ".productname",
                "type": "text"
              },
              {
                "name": "price",
                "selector": ".price em",
                "type": "text"
              },
              {
                "name": "url",
                "selector": "a.f-grid-12.prodname",
                "type": "attribute",
                "attribute": "href"
              }
            ]
          }
        }
      }
    }
  }
}