Toolpaper

Convert cURL to FastAPI

Paste any curl command and get Python code you can drop into a FastAPI project. Async endpoints with httpx AsyncClient. Runs entirely client-side.

Quick answer

To convert a cURL command to Python, paste it into the Toolpaper workbench below. It parses the command in your browser and emits idiomatic Python code — headers, query string, request body, authentication (Bearer, Basic, API key), and cookies are all wired up automatically. No data is uploaded; conversion is fully client-side.

InputcURL command
MethodPOST·Headers1·Body40 B· Chars 132
OutputPython · requests(sync)
import requests

headers = {
    "Content-Type": "application/json",
}

response = requests.post(
    "https://api.example.com/users",
    headers=headers,
    json={
    "name": "Ada",
    "email": "ada@example.com"
},
)
Inspect

Example

A representative curl command for this scenario. Paste your own above to convert an exact match.

curl input
curl -X POST https://api.example.com/users \
  -H "Content-Type: application/json" \
  -d '{"name":"Ada","email":"ada@example.com"}'

Implementation notes

  • Generated code uses the requests primitive that fits FastAPI's idioms — you can drop it into a controller, action, or service.
  • Errors and timeouts propagate naturally so you can wrap the call in FastAPI's middleware and observability layer.
  • Environment variables replace inline secrets when you run the output through the Clean panel first.

Common mistakes

  • Blocking a request-scoped FastAPI handler on a slow upstream — always set a timeout in the generated call.
  • Recreating an HTTP client per request instead of reusing a module-level one — kills keep-alive performance.
  • Leaking request-scoped headers (auth, tracing) to upstream calls — the generator only forwards what you paste.

Common questions

Which Python library does the FastAPI output use?
requests, because it's the idiomatic choice inside FastAPI. Switch libraries in the language dropdown any time.
Can I use this in a serverless function?
Yes. The generated code is a plain Python function; deploy it on FastAPI's serverless target of choice.
Is any data sent to Toolpaper's servers?
No. Parsing and code generation run entirely in your browser.

More guides in Python

Python hub →

Django

/how-to/curl-in-django

Flask

/how-to/curl-in-flask

Full Python reference on the cURL to Python hub, or open the main converter for all 18 targets.