absolutepay

Official AbsolutePay API client for Python. Server-side only — your API key and signing secret must never reach a browser.

Every request from an app key is HMAC-signed automatically. Inbound webhooks are verified with one call. Zero runtime dependencies — standard library only.

Install

pip install absolutepay

Requires Python 3.9+.

Environments

Use a dedicated sandbox app (sign up at sandbox.absolutepay.io) with sandbox=True to test end-to-end without moving real funds.

Quickstart

import os
from absolutepay import AbsolutePay

ap = AbsolutePay(
    api_key=os.environ["ABSOLUTEPAY_API_KEY"],            # ap_live_… / ap_test_…
    signing_secret=os.environ["ABSOLUTEPAY_SIGNING_SECRET"],  # apisign_…  (required for app keys)
    # sandbox=True,             # → https://sandbox-api.absolutepay.io (default is production)
    # base_url="https://…",     # optional: override the origin entirely (wins over sandbox)
)

balances = ap.balances.list()          # {"items": [...]}
preview = ap.fees.preview(amount="100", currency="USDT")
# Withdrawal/payout fees are per-chain — pass `chain`:
payout_fee = ap.fees.preview(amount="100", currency="USDT", payment_type="WITHDRAWAL", chain="MATIC")

# Hosted checkout link — the payer picks which asset/chain to pay with on the page
checkout = ap.checkouts.create(
    reference="order-123",
    amount={"amount": "25.00", "currency": "USDT"},
    redirect_url="https://shop.example.com/thank-you",  # payer returns here when done
)
print(checkout["checkoutUrl"])  # send the payer here; confirm via the payment.succeeded webhook

# Up-front address flow — `chain` is required; the deposit address is minted immediately
invoice = ap.invoices.create(
    reference="order-124",
    amount={"amount": "25.00", "currency": "USDT"},
    chain="TRX",
)
print(invoice["address"])

Money

Amounts are plain dicts — a decimal string plus a currency code:

{"amount": "10.00", "currency": "USDT"}

Resources

balances · fees · payouts · refunds · conversions · checkouts · invoices · deposits · subscriptions (+ subscriptions.plans) · giftcards · offramp · reconciliation

Both checkouts and invoices expose the same CRUD: create · list · get · update · delete.

Lists & pagination

Every list-style method takes keyword filters plus limit / before / order ("asc"/"desc") and returns the raw page {"items": [...], "nextCursor": ...}. Page by feeding nextCursor back as before; a None cursor is the last page. Refund, conversion and reconciliation histories additionally carry a total.

page = ap.checkouts.list(status="open", limit=50, order="desc")
for chk in page["items"]:
    ...
cursor = page["nextCursor"]  # pass as before= for the next page; None on the last

# Settled refund history (keyset-paginated, carries a total)
refunds = ap.refunds.list(from_=1_700_000_000_000, to=1_800_000_000_000, currency="USDT")

Idempotency

Money POSTs — payouts.create, refunds.create, conversions.execute, offramp.withdraw, giftcards.create, subscriptions.create, subscriptions.plans.create — accept idempotency_key=, sent as the Idempotency-Key header (a retry with the same key never acts twice; a 409 surfaces as a normal AbsolutePayError).

# Batch payout (idempotent — a retry with the same key never pays twice)
ap.payouts.create(
    [{"recipientAddress": "0xabc…", "chain": "MATIC", "amount": {"amount": "5.00", "currency": "USDT"}}],
    idempotency_key="payroll-2026-07-01",
)

# Convert USDT → ETH (quote then execute)
q = ap.conversions.quote(sell_currency="USDT", buy_currency="ETH", sell_amount="100")
ap.conversions.execute(
    quote_id=q["quoteId"],
    sell={"amount": q["sellAmount"], "currency": q["sellCurrency"]},
    buy={"amount": q["buyAmount"], "currency": q["buyCurrency"]},
    idempotency_key="convert-001",
)

Deposits (own-balance receive addresses)

ap.deposits.chains()                     # {"items": [...]}
addr = ap.deposits.create_address(chain="TRX")   # idempotent mint-or-return
ap.deposits.list(chain="TRX")            # settled deposit history {"items", "nextCursor"}

Errors

Non-2xx responses raise AbsolutePayError:

from absolutepay import AbsolutePayError

try:
    ap.invoices.list()
except AbsolutePayError as e:
    print(e.status, e.code, e.detail, e.request_id)
    if e.is_rate_limited:  # 429 — back off and retry
        ...
    if e.is_auth:          # 401/403 — bad creds, missing scope, or bad signature
        ...

Webhooks

Verify the signature and parse the event in one call. Pass the raw request body (bytes or str), the request headers, and your app's callback secret (whsec_…):

from absolutepay import construct_event, WebhookSignatureError

# e.g. in a Flask handler
raw = request.get_data()  # RAW bytes — do not re-serialize
try:
    event = construct_event(raw, dict(request.headers), os.environ["ABSOLUTEPAY_WEBHOOK_SECRET"])
except WebhookSignatureError:
    return "", 400

if event["type"] == "payment.succeeded":
    fulfill(event["data"])
return "", 200

The freshness (replay) window defaults to 5 minutes; pass tolerance_ms=0 to disable it.

Security

• Server-side only. The API key + signing secret authenticate as your workspace — never ship them to a browser or mobile app.
• Requests are sent over HTTPS only (except localhost for local development).
• The Idempotency-Key header (on money POSTs) is intentionally not part of the signed canonical string.

License

MIT