cowriepay 0.1.0

Official CowriePay Python SDK: signed Developer API client + webhook verification.

cowriepay (Python)

Official CowriePay Python SDK: a signed client for the CowriePay Developer API (/v2) plus webhook signature verification. Server-side only (your cpk_* secret must never reach a browser or mobile app). Zero runtime dependencies (standard library only). Python ≥ 3.9.

Install

pip install cowriepay

Quickstart

import os
from cowriepay import CowriePay

cowriepay = CowriePay(api_key=os.environ["CPK_KEY"], api_secret=os.environ["CPK_SECRET"])
# One base URL for everything: https://api.cowriepay.io
# The key you use selects the network, no host switch:
#   cpk_test_… → Sandbox (testnets: TRON Nile, BSC testnet, ETH Sepolia; fund from faucets)
#   cpk_live_… → Live (mainnets, real funds)
# Same code for both; swap the key to go live. Override the host with base_url=... (e.g. a dev host).

wallet = cowriepay.wallets.create(
    {"chain": "TRON", "asset": "USDT_TRON"},
    idempotency_key="a-uuid",  # makes the POST safe to auto-retry
)

balances = cowriepay.transactions.balances()
deposits = cowriepay.transactions.list_deposits(status="CONFIRMED", limit=20)

Namespaces: wallets, customers, transactions (deposits / withdrawals / balances), withdrawals, fees, webhooks, api_keys, health. For anything not wrapped, cowriepay.request(method, path, body=...) is a signed escape hatch.

CowriePay ships WaaS-first: this SDK is generated from the WaaS-only API view, so it does not include the checkout surface (payment intents / refunds). Those appear automatically when checkout launches.

Errors

from cowriepay import AuthenticationError, NotFoundError, CowriePayError

try:
    cowriepay.wallets.get("does-not-exist")
except NotFoundError:
    ...  # 404 / FEATURE_NOT_AVAILABLE
except AuthenticationError:
    ...  # 401 INVALID_SIGNATURE / TIMESTAMP_EXPIRED / ...
except CowriePayError as err:
    print(err.code, err.status, err.request_id)

Verifying webhooks

Verify against the raw request body. During a secret rotation, pass both the current and previous secrets so no delivery is rejected while you roll the secret.

from cowriepay import verify_webhook

ok = verify_webhook(
    payload=raw_body_bytes,                       # the RAW body (bytes or str)
    signature_header=headers["X-CowriePay-Signature"],
    timestamp=headers["X-CowriePay-Timestamp"],
    secrets=[os.environ["WEBHOOK_SECRET"]],       # add the previous secret during rotation
    tolerance_seconds=300,                        # optional replay guard
)

Development

python -m venv .venv && . .venv/bin/activate
pip install -e ".[dev]"
python -m pytest        # golden vectors + prove-it-fails + client behaviour
python -m mypy          # strict type-check of the hand-written core

License

MIT, Copyright (c) 2026 COWRIEX SAS. See LICENSE.

CowriePay and COWRIEX are trademarks of COWRIEX SAS. This license covers the source code only and grants no right to the COWRIEX or CowriePay names or logos.