Accept crypto payments in FastAPI

Add non-custodial crypto checkout to your FastAPI app: create an invoice, send the buyer to the hosted checkout, and fulfill on a signed webhook. Funds settle straight to your own wallet, $0 platform fees.

Install

pip install shieldz

Create an invoice and redirect to checkout

from shieldz import Shieldz
shieldz = Shieldz(os.environ["SHIELDZ_API_KEY"])
@app.post("/checkout")
def checkout():
    invoice = shieldz.invoices.create(amount_usd_cents=5000, memo="Order")
    return RedirectResponse(invoice["pay_url"], status_code=303)

Verify the webhook

from shieldz import construct_event, SignatureVerificationError
@app.post("/webhooks/shieldz")
async def webhook(request: Request):
    raw = await request.body()
    try:
        event = construct_event(raw, request.headers.get("x-shieldz-signature", ""), os.environ["SHIELDZ_WEBHOOK_SECRET"])
    except SignatureVerificationError:
        raise HTTPException(400)
    if event["type"] == "invoice.paid":
        ...  # fulfill the order
    return {"ok": True}

Full reference: API docs, SDKs, API reference.

Explore Shieldz

Accept a coin: Bitcoin, USDC, USDT, Zcash.

Compare: vs Coinbase Commerce, vs BTCPay Server, vs CryptAPI, vs NOWPayments, vs Cryptomus, vs BitPay, vs CoinGate, vs OpenNode, vs Plisio, vs BlockBee, vs CoinPayments.

Use cases: For freelancers, For creators, For open-source projects, For online stores, For SaaS, For VPN & hosting providers, For agencies, For nonprofits, For digital sellers.

Build: SDKs, API reference, quickstart. Learn: overview, blog, how it works, supported coins, pricing, is it safe, verify it yourself.