Cryptoniq for WordPress

HPOS (High-Performance Order Storage) compatible.

Supported coins

Bitcoin (BTC)

Ethereum (ETH)

Want more coins, stablecoins, or instant detection? A separate paid plugin, Cryptoniq PRO, is sold at cryptoniq.io. It is not included in or downloaded by this free plugin — it’s a separate plugin you install alongside this one. PRO adds:

Litecoin, Dogecoin, TRON, Solana, BNB Smart Chain

ETH on Arbitrum One and Optimism

USDT and USDC stablecoins on multiple chains

Real-time webhook detection (no waiting on polling)

150+ fiat currencies for conversion

Priority support

This free version does not contain any PRO code or features — it’s fully functional standalone, and there is no license key field anywhere in this plugin.

External services This plugin relies on three external services to do its job. They are all free, public, and require no account or API key (the bundled Etherscan key is a shared default that you can override). No personal data is ever sent — not the buyer’s name, IP, email, order details, or anything else. Only public blockchain addresses you have already chosen to share, and the public identifiers of the coins/currencies whose prices the plugin needs to quote.

1. api.coingecko.com — exchange rates

What it is: CoinGecko’s free public price API.

What it’s used for: Converting your store’s order totals from fiat (USD, EUR, GBP, …) into the equivalent amount of BTC or ETH the customer needs to send at checkout.

What data is sent: Only the public coin identifiers (bitcoin, ethereum) and the target currencies (usd, eur) the plugin needs prices for. The request URL looks like https://api.coingecko.com/api/v3/simple/price?ids=bitcoin,ethereum&vs_currencies=usd,eur. No personal data, no order data, no site identifiers.

When it’s sent: Once every 30 minutes via WordPress cron (background), and on plugin activation if no cached prices exist yet. Never on a customer-facing page load.

Terms of Service: https://www.coingecko.com/en/terms

Privacy Policy: https://www.coingecko.com/en/privacy

2. blockchain.info — BTC transaction lookups

What it is: Blockchain.com’s public Bitcoin blockchain explorer.

What it’s used for: Checking whether the customer’s expected BTC payment has arrived at the wallet address you configured. The plugin asks blockchain.info for the list of unspent outputs at that address and looks for one matching the order’s expected amount.

What data is sent: Only the merchant’s BTC wallet address — the same address the buyer is asked to send funds to (already public, both on your checkout page and on-chain). The request URL looks like https://blockchain.info/unspent?active=YOUR_BTC_ADDRESS. No buyer data, no order ID, no site identifiers.

When it’s sent: Only while a customer is actively on the Cryptoniq payment page for an unpaid BTC order — polled via AJAX every few seconds until payment is detected or the 3-hour payment window expires. Never otherwise.

Terms of Service: https://www.blockchain.com/legal/terms

Privacy Policy: https://www.blockchain.com/legal/privacy

3. api.etherscan.io — ETH transaction lookups

What it is: Etherscan’s public Ethereum blockchain explorer API.

What it’s used for: Same purpose as blockchain.info but for ETH — checking whether the customer’s expected ETH payment has arrived at the merchant’s wallet address.

What data is sent: Only the merchant’s ETH wallet address and an Etherscan API key (the plugin ships with a free shared-tier key; you can replace it via the apikey_eth option). The request URL looks like https://api.etherscan.io/api?module=account&action=txlist&address=YOUR_ETH_ADDRESS&apikey=.... No buyer data, no order ID, no site identifiers.

When it’s sent: Only while a customer is actively on the Cryptoniq payment page for an unpaid ETH order — same AJAX polling schedule as blockchain.info above. Never otherwise.

Terms of Service: https://etherscan.io/terms

Privacy Policy: https://etherscan.io/privacypolicy

The plugin never connects to api.cryptoniq.io or any other server controlled by the plugin author — all blockchain and price data comes from the three independent public services listed above.

Third-Party Libraries This plugin ships with the following third-party JavaScript libraries. The minified files in assets/js/cryptoniq.libs.js are publicly maintained open-source projects — full unminified source is available at each project’s repository:

clipboard.js v1.7.1 — copy-to-clipboard helper for the payment box. Source: https://github.com/zenorocha/clipboard.js (MIT license)