Documentation
One REST call to accept a payment, one signature check for trust. Your first sandbox invoice takes about five minutes; production integration with webhook verification usually fits within one business day.
Connect ZeroKYC Pay in 15 minutes
Step-by-step guide: account and keys, first invoice, hosted checkout, webhooks and HMAC, going live — with copy-paste code.
Quickstart
Create your first invoice with payment_currency=any, send the buyer to hosted checkout and receive a signed webhook.
Sandbox & testing
How pk_test keys and the simulated chain work, simulating payments from the console and testing your webhook handler end-to-end.
Invoices API
Every merchant endpoint with examples: create, list, get, cancel, payment QR codes, plus events and payouts.
Invoice lifecycle
The invoice state machine: statuses, option statuses, observations, unique-amount windows and which webhook fires when.
Rate limits & idempotency
Per-key limits with X-RateLimit headers and Retry-After, plus Idempotency-Key semantics: replays, conflicts, the 24-hour window.
Errors
The uniform error envelope and all eight error codes: when each fires and how to handle it.
Webhooks reference
The full event catalogue with exact payloads, delivery headers and semantics, the 1m→12h retry ladder and consumer idempotency rules.
SDKs: PHP, Python, Node.js
Official PHP, Python and Node.js SDKs: install, create invoices with idempotency keys and verify webhook signatures in one call.
HMAC signature verification
Verify webhook signatures in Node.js, PHP and Python — constant-time comparison and the 5-minute timestamp window.
Networks: confirmations & TTL
Confirmation thresholds per network (TRON, EVM incl. Ethereum/BSC, BTC/LTC/DOGE/BCH, XRP, NEAR, Solana, TON, Monero) and invoice TTL rules: mempool waiting, expiry and rescan behaviour.
Direct checkout guide
Connect your own wallet: one static address + unique amounts for every asset except Monero (view key).
API Reference (OpenAPI)
Interactive REST API specification: invoices, webhooks, payouts, exchange rates, and sandbox.