Python (FastAPI, Django & Flask) Backend Integration

FastAPI Async Backend Client

Use httpx to query the ParityEdge Edge API asynchronously. Pass the visitor's IP in the x-forwarded-for header to evaluate their country:

import httpx
from fastapi import FastAPI, Request

app = FastAPI()

EDGE_API_URL = "https://api.parityedge.app/v1/lookup"
PROJECT_ID = "prj_live_YOUR_KEY"

@app.get("/api/pricing")
async def get_localized_pricing(request: Request):
    # Extract client IP from proxy headers
    client_ip = request.headers.get("x-forwarded-for", request.client.host).split(",")[0].strip()

    async with httpx.AsyncClient(timeout=2.0) as client:
        try:
            resp = await client.get(
                EDGE_API_URL,
                params={"projectId": PROJECT_ID},
                headers={"x-forwarded-for": client_ip}
            )
            parity_data = resp.json()
        except Exception:
            # Safe fail-open default
            parity_data = {"eligible": False, "discountPercentage": 0}

    return {
        "base_price_usd": 49.0,
        "parity": parity_data
    }