FastAPI Guide Best Payment Solutions for FastAPI (2026)
Compare the best payment solutions for FastAPI. We review Stripe, Paddle, and more with async Python SDK support and webhook handling patterns.
Adding payments to FastAPI requires async-compatible payment libraries and proper webhook handling. We've evaluated payment providers with Python SDKs that work well with FastAPI's async architecture.
Pourquoi C'est Important
Payment integration is critical for monetization. FastAPI's async nature means you need non-blocking payment calls. Webhook handling requires proper signature verification and idempotency.
Considérations Clés
Async SDK Support
Native async support in payment SDKs prevents blocking. Stripe's library supports async. Others may need async wrappers.
Webhook Handling
FastAPI receives webhooks as POST requests. Verify signatures in the route, use background tasks for processing.
Merchant of Record
Handle taxes yourself (Stripe) or let the provider handle it (Paddle, LemonSqueezy). Important for global sales.
Pydantic Integration
Payment events can be validated with Pydantic models. Great for type safety in webhook handlers.
Idempotency
Webhooks can be sent multiple times. Store processed event IDs to prevent duplicate handling.
Nos Recommandations
Stripe
Meilleur Global Excellent Support SDK OfficielStripe's Python SDK works well with FastAPI. Use stripe.checkout.Session.create() for payments. Excellent webhook support. 2.9% + 30¢.
pip install stripe 
Paddle
Meilleur pour Ventes Globales Bon Support SDK OfficielPaddle handles global tax compliance as Merchant of Record. Python SDK available. Higher fees (5% + 50¢) but saves tax headaches.
pip install paddle-python-sdk 
LemonSqueezy
Meilleur pour SaaS Bon SupportLemonSqueezy is Merchant of Record with simple pricing. Use their API with httpx for async calls. Great for digital products.
pip install httpx 
PayPal
Meilleure Portée Globale Bon Support SDK OfficielPayPal reaches customers worldwide. Python SDK available. Good as a secondary payment method alongside Stripe.
pip install paypal-checkout-serversdk 
Square
Meilleur Omnicanal Bon Support SDK OfficielSquare for unified online and in-person payments. Python SDK available. Good if you have physical presence too.
pip install squareup Comparaison Rapide
| Service | TypeScript | Edge | Offre Gratuite | Temps de Configuration |
|---|---|---|---|---|
| Stripe | none | — | N/A | 30 min |
| Paddle | none | — | N/A | 45 min |
| LemonSqueezy | none | — | N/A | 30 min |
| PayPal | none | — | N/A | 45 min |
| Square | none | — | N/A | 30 min |
Démarrage Rapide
import stripe
from fastapi import APIRouter, HTTPException
from pydantic import BaseModel
stripe.api_key = settings.STRIPE_SECRET_KEY
router = APIRouter()
class CheckoutRequest(BaseModel):
price_id: str
@router.post("/create-checkout")
async def create_checkout(request: CheckoutRequest):
session = stripe.checkout.Session.create(
payment_method_types=['card'],
line_items=[{'price': request.price_id, 'quantity': 1}],
mode='subscription',
success_url='https://yoursite.com/success',
cancel_url='https://yoursite.com/cancel',
)
return {'checkout_url': session.url}Modèles d'Intégration Courants
Stripe + FastAPI + PostgreSQL
Stripe for payments, store subscription state in PostgreSQL, sync via webhooks.
Paddle + FastAPI + Redis
Paddle handles checkout, use Redis for caching subscription status.
Stripe + Celery Webhooks
Process Stripe webhooks asynchronously with Celery for reliability.