Python SDK

The openpay-sdk package provides an async-first Python client built on httpx. It supports Python 3.9+.

Installation

pip install openpay-sdk

Initialization

import os
from openpay import OpenPayClient

client = OpenPayClient(
    api_key=os.environ["OPENPAY_API_KEY"],
    api_secret=os.environ["OPENPAY_API_SECRET"],
    base_url="https://olp-api.nipuntheekshana.com",  # optional, this is the default
)

Never hardcode your API secret. Use environment variables or a secrets manager.

Create a Payment

payment = await client.payments.create(
    amount=50.00,
    currency="USD",
    description="Invoice #1234",
    metadata={
        "order_id": "order_abc123",
        "customer_id": "cust_456",
    },
)

print(f"Payment ID: {payment.id}")
print(f"Status: {payment.status}")
print(f"Wallet: {payment.wallet_address}")
print(f"Expires: {payment.expires_at}")

Synchronous Usage

If you prefer synchronous calls, use the sync client:

from openpay import OpenPayClient

client = OpenPayClient(
    api_key=os.environ["OPENPAY_API_KEY"],
    api_secret=os.environ["OPENPAY_API_SECRET"],
)

payment = client.payments.create_sync(
    amount=50.00,
    currency="USD",
    description="Invoice #1234",
)

Create a Checkout Session

session = await client.checkout.create_session(
    amount=25.00,
    currency="USD",
    description="Premium Plan - Monthly",
    metadata={
        "order_id": "order_12345",
        "customer_id": "cust_67890",
    },
    success_url="https://yoursite.com/payment/success",
    cancel_url="https://yoursite.com/payment/cancel",
)

# Redirect the customer to this URL
print(f"Checkout URL: {session.checkout_url}")

Verify Webhook Signature

Use with FastAPI, Flask, or any ASGI/WSGI framework.

FastAPI
Flask

from fastapi import FastAPI, Request, HTTPException
from openpay import OpenPayClient

app = FastAPI()
client = OpenPayClient(
    api_key=os.environ["OPENPAY_API_KEY"],
    api_secret=os.environ["OPENPAY_API_SECRET"],
)

@app.post("/api/webhooks/openpay")
async def handle_webhook(request: Request):
    payload = await request.body()
    signature = request.headers.get("x-webhook-signature", "")
    timestamp = request.headers.get("x-webhook-timestamp", "")

    is_valid = client.webhooks.verify_signature(
        payload=payload,
        signature=signature,
        timestamp=timestamp,
    )

    if not is_valid:
        raise HTTPException(status_code=401, detail="Invalid signature")

    event = await request.json()

    match event["type"]:
        case "payment.completed":
            print(f"Payment completed: {event['data']['paymentId']}")
            # Fulfill the order
        case "payment.failed":
            print(f"Payment failed: {event['data']['paymentId']}")
        case "payment.expired":
            print(f"Payment expired: {event['data']['paymentId']}")

    return {"received": True}

from flask import Flask, request, jsonify
from openpay import OpenPayClient

app = Flask(__name__)
client = OpenPayClient(
    api_key=os.environ["OPENPAY_API_KEY"],
    api_secret=os.environ["OPENPAY_API_SECRET"],
)

@app.post("/api/webhooks/openpay")
def handle_webhook():
    payload = request.get_data()
    signature = request.headers.get("X-Webhook-Signature", "")
    timestamp = request.headers.get("X-Webhook-Timestamp", "")

    is_valid = client.webhooks.verify_signature(
        payload=payload,
        signature=signature,
        timestamp=timestamp,
    )

    if not is_valid:
        return jsonify({"error": "Invalid signature"}), 401

    event = request.get_json()

    if event["type"] == "payment.completed":
        print(f"Payment completed: {event['data']['paymentId']}")

    return jsonify({"received": True}), 200

List Payments

payments = await client.payments.list(
    page=1,
    limit=20,
    status="completed",
)

for p in payments.data:
    print(f"{p.id}: {p.amount} {p.currency} - {p.status}")

Error Handling

from openpay import OpenPayClient, OpenPayError

try:
    payment = await client.payments.create(
        amount=50.00,
        currency="USD",
    )
except OpenPayError as e:
    print(f"API Error {e.status_code}: {e.message}")
    print(f"Error code: {e.code}")
except Exception as e:
    print(f"Unexpected error: {e}")

Error Attribute	Type	Description
`status_code`	`int`	HTTP status code
`message`	`str`	Human-readable error message
`code`	`str`	Machine-readable error code

SDKs

​Python SDK

​Installation

​Initialization

​Create a Payment

​Synchronous Usage

​Create a Checkout Session

​Verify Webhook Signature

​List Payments

​Error Handling

Python SDK

Installation

Initialization

Create a Payment

Synchronous Usage

Create a Checkout Session

Verify Webhook Signature

List Payments

Error Handling