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Payzum for Fluent Forms

Accept crypto & stablecoin payments (USDC, USDT, multi-chain) in Fluent Forms with Payzum — non-custodial crypto payment gateway plugin for WordPress payment forms

by Payzum · github.com/payzum-dev/fluent-forms-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/fluent-forms-payzum/archive/refs/heads/main.zip
Readme github.com/payzum-dev/fluent-forms-payzum ↗

Payzum for Fluent Forms — Accept Crypto & Stablecoin Payments (USDC, USDT)

Accept cryptocurrency and stablecoin payments (USDC, USDT and more, multi-chain) in Fluent Forms payment forms through Payzum — non-custodial: funds settle directly to your own wallet, Payzum never takes custody. Works with the free Fluent Forms — no Pro required. No chargebacks, no card networks, no PCI surface.

  • Plugin: payzum-for-fluent-forms · Version: 1.0.0 · License: MIT
  • Requires: WordPress ≥ 6.0, Fluent Forms 6.0+ (ships the payments module), PHP ≥ 8.1

How it works

  1. The visitor submits a payment form with Payzum selected and is redirected to a hosted checkout page (QR code + deposit address, live status), where they choose the coin and chain and send the payment. No wallet or card data touches your server.
  2. Crypto confirmation is asynchronous, so the submission is marked paid from Payzum's signed server-to-server IPN webhook, never from the browser return — a closed tab never loses a paid submission.
  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, the settled amount and currency are re-checked against the transaction, and the whole transition runs under a per-submission lock — a form's confirmations and notifications fire exactly once.

Features

  • Stablecoin-first: USDC and USDT across multiple chains (Polygon, Ethereum, Arbitrum, Base, Optimism, Tron, Solana and more), plus major cryptocurrencies.
  • Non-custodial — payments settle to the site owner's own wallet.
  • Works with free Fluent Forms — uses the built-in payments module and the standard redirect flow; no Pro licence, no forked code.
  • Signed IPN webhooks (HMAC-SHA-512) settle submissions server-side, with amount/currency verification, event deduplication and per-submission locking.
  • Secrets encrypted at rest with Fluent Forms' own key encryption, masked in the admin.
  • Zero chargebacks — crypto payments are final.

Installation

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

Configuration

Go to Fluent Forms → Global Settings → Payment Settings → Payzum:

Setting Meaning
API key From your Payzum merchant dashboard
Webhook secret Verifies incoming payment webhooks (IPN); stored encrypted
Environment Production or staging (staging needs its own API key)

Paste the shown IPN URL (https://<your-site>/?fluentform_payment_api_notify=1&payment_method=payzum) into the Payzum dashboard webhook settings. The signature header is fixed; nothing to configure.

Then add a Payment Method field to any payment form and enable Payzum. The payer 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.

Payment status mapping

Payzum payment status Fluent Forms transaction / submission
finished (amount and currency match) Paid — confirmations and notifications fire once
finished (settled amount or currency does not match) Stays pending, flagged in the log for review
partially_paid No change (underpaid — must not fulfil)
expired / failed Failed
anything else Acknowledged, no state change

Subscriptions are declined at submission time: crypto has no recurring pull, so only one-time payment forms are supported.

FAQ

Is Payzum custodial? No. Funds settle directly to your own wallet — Payzum never holds your money.

Can Fluent Forms accept USDT or USDC payments? Yes — with this plugin, any Fluent Forms payment form can take USDC, USDT or other assets on the chains you allow, settled automatically from a signed webhook.

Do payers 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 require Fluent Forms Pro? No. It runs on the free Fluent Forms 6.0+, which ships the payments module.

What about chargebacks? There are none — crypto payments are final, which eliminates chargeback fraud.

What data is shared with Payzum? Only the payment amount, currency, a submission reference and your site's callback URLs — no personal data from the form. 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, GiveWP, Paid Memberships Pro, Tutor LMS, 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: 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

MIT. Contributed and maintained by Payzum.