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Payzum Crypto & Stablecoin Donations for GiveWP

Accept crypto & stablecoin donations (USDC, USDT, multi-chain) in GiveWP with Payzum — non-custodial crypto donation gateway plugin for WordPress

by Payzum · github.com/payzum-dev/givewp-payzum · website

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Install

No release zip yet. The repository archive installs, but the folder name will carry the branch suffix and updates will not flow:

wp plugin install https://github.com/payzum-dev/givewp-payzum/archive/refs/heads/main.zip
Readme github.com/payzum-dev/givewp-payzum ↗

Payzum for GiveWP — Accept Crypto & Stablecoin Donations (USDC, USDT)

Accept cryptocurrency and stablecoin donations (USDC, USDT and more, multi-chain) in GiveWP through Payzum — non-custodial: funds settle directly to your organization's own wallet, Payzum never takes custody. No chargebacks, no card networks, no PCI surface.

  • Plugin: payzum-give · Version: 1.3.0 · License: GPL-2.0-or-later
  • Requires: WordPress ≥ 5.6, GiveWP 3.x+ (verified against 4.16), PHP ≥ 8.1
  • Built on GiveWP's next-gen payment gateway API, with v3 (visual builder) form support

How it works

  1. The donor picks Payzum on the donation form and pays on a hosted checkout page (QR code + deposit address, live status) — or in an embedded widget, see render modes below — where they choose the coin and chain. No wallet or card data touches your server.
  2. Crypto confirmation is asynchronous, so the donation is completed from Payzum's signed server-to-server IPN webhook, never from the donor's browser return — a closed tab never loses a settled donation.
  3. Every webhook is verified with HMAC-SHA-512 over the raw request bytes (constant-time compare, replay window) before a single field of it is read. Redelivered webhooks are deduplicated and the settled amount and currency are re-checked against the donation before it completes, so a donation is never counted twice — or for the wrong amount.

Features

  • Stablecoin-first: USDC and USDT across multiple chains (Polygon, Ethereum, Arbitrum, Base, Optimism, Tron, Solana and more), plus major cryptocurrencies.
  • Non-custodial — donations settle to the charity's own wallet.
  • Three render modes — full redirect to the hosted checkout, a modal overlay, or an inline widget mounted in place of the donation form.
  • Signed IPN webhooks (HMAC-SHA-512) complete donations server-side, with amount/currency verification and per-donation locking against double delivery (no duplicate receipts, no double-counted campaign totals).
  • Fiat or crypto pricing — price in your site currency and let Payzum convert, or denominate directly in a stablecoin.
  • Modern v3 donation forms supported via window.givewp.gateways.register().
  • Zero chargebacks — crypto donations are final.

Installation

Upload the payzum-give folder to /wp-content/plugins/ (or install the zip via Plugins → Add New → Upload), then activate it (requires GiveWP). The official payzum/payzum-php SDK is vendored, so no composer step is needed.

Configuration

Go to Donations → Settings → Payment Gateways → Payzum:

Setting Meaning
API key From your Payzum merchant dashboard
Webhook secret Verifies incoming payment webhooks (IPN)
Currency mode fiat (default — Payzum converts from your site currency) or crypto (denominate directly in a stablecoin)
Render mode redirect (default), modal, or inline widget
Environment Production or staging (staging needs its own API key)
Debug log Writes to the WordPress debug log, prefixed [payzum]

The settings screen shows your site's IPN URL (https://<your-site>/?give-listener=payzum) read-only — paste it into the Payzum dashboard webhook settings. The signature header is fixed; nothing to configure.

Remember to enable Payzum for v3 forms too — GiveWP keeps a separate enabled-gateway list for the visual form builder.

The donor chooses the coin on the Payzum checkout, limited to the allowlist you configure in the Payzum dashboard (Merchants → Settings → Accepted tokens) and enforced server-side.

Donation status mapping

Payzum payment status GiveWP donation status
finished (amount and currency match the donation) Complete
finished (settled amount or currency does not match) Processing — flagged for review, not completed
partially_paid Processing (underpaid — the donor sent less than the invoice)
expired Abandoned
failed Failed
anything else Donation note only, status unchanged

FAQ

Is Payzum custodial? No. Donations settle directly to your organization's own wallet — Payzum never holds the funds.

Can GiveWP accept USDT or USDC donations? Yes — with this plugin, donors give in USDC, USDT or other assets on the chains you allow, and the donation completes automatically from a signed webhook.

Do donors need an account or a specific wallet? No. They scan a QR or copy a deposit address from the Payzum checkout and pay from any wallet.

Does it work with the modern GiveWP visual form builder (v3 forms)? Yes. The gateway implements GiveWP's next-gen payment gateway API and registers itself with v3 forms via enqueueScript().

Can donors stay on my site instead of being redirected? Yes. The modal and inline render modes mount the Payzum payment widget in place; completion still happens exclusively from the signed IPN. If your site sets a Content-Security-Policy, allow merchant.payzum.com in script-src, frame-src and connect-src.

What data is shared with Payzum? Only the donation amount, currency, a donation reference and your site's callback URLs — no donor personal data. Endpoints: https://merchant.payzum.com (production), https://staging.payzum.com (staging).

Payzum ships official plugins for most major e-commerce, donation and billing platforms — WooCommerce, Easy Digital Downloads, Paid Memberships Pro, Magento 2, PrestaShop, Shopware 6, OpenCart, Zen Cart, nopCommerce, Ecwid, BigCommerce, Shopify, Wix, Medusa, Vendure, Saleor, Sylius, WHMCS, Blesta, HostBill, ClientExec, pretix, Frappe/ERPNext, Akaunting and django-payments — plus official SDKs for PHP, Node.js/TypeScript, Python and Rust. Browse them all at github.com/payzum-dev.

About Payzum

Payzum is a non-custodial crypto payment gateway for merchants and nonprofits: accept USDC, USDT and other digital assets with settlement straight to your own wallet, optional auto-conversion to stablecoins, and a single REST API. API docs: merchant.payzum.com/api/docs.

License

GPL-2.0-or-later. Contributed and maintained by Payzum.