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Zero Middleware
Native WordPress runtime execution with 0 SaaS latency.
GPLv2 Licensed
100% unencrypted code. Inspect, extend, and deploy freely.
PHP 8.3 Ready
Tested against WP 6.7+ & Gravity Forms 2.9+ core.
WordPress Add-onv1.0.0
Formidable REST Webhooks & HMAC Signed Payloads Pro
Secure outbound webhook dispatch with SHA-256 HMAC cryptographic signatures and retries.
4.9(1,200+ developers)
480 downloads
Billed annually
All-Access Pass
Explore →Unlock All 400+ Plugins for $199/yr
Unlimited sites, future releases & priority support.
Included With Your Purchase
Instant ZIP Download — Clean, unencrypted GPLv2 code
1-Click Automatic Updates — Directly from WordPress Admin
1 Year Priority Ticket Support — Answers in <4 hours
30-Day Money-Back Guarantee — 100% risk-free trial
100% Risk-Free 30-Day GuaranteeIf this add-on does not solve your exact Gravity Forms workflow requirement, our engineering team will resolve it or issue a prompt 100% refund.
256-Bit SSL Encrypted View Documentation
Core Capabilities
- Outbound HTTP POST, PUT, PATCH, and GET webhook dispatch
- Cryptographic SHA-256 HMAC signature generated in X-Formidable-Signature header
- Custom HTTP headers configuration (Bearer tokens, Basic Auth, API keys)
- JSON, Form-Data, and XML request body payload formats
- Exponential backoff retry queue on HTTP 5xx or connection timeout
- Detailed webhook delivery history log with HTTP status codes and response bodies
Technical Specifications
Versionv1.0.0 (Production)
PlatformWordPress
PHP Compatibility8.0 – 8.3+
WordPress Compatibility6.0 – 6.7+
LicenseGPLv2
Updates1-Click Automatic
Architectural
Overview
Formidable REST Webhooks & HMAC Signed Payloads Pro provides enterprise security for outbound webhooks. Sign all JSON payloads with an HMAC SHA-256 signature header, customize HTTP headers, and handle network timeouts with automated retries.
Frequently Asked Questions
Frequently Asked Questions
How do I install and configure Formidable REST Webhooks & HMAC Signed Payloads Pro?
Download the signed ZIP file from GravityHive, navigate to Plugins → Add New → Upload Plugin in your WordPress admin, activate the plugin, and enter your license key under Form Settings → GravityHive Licenses to enable automated 1-click updates.
Is Formidable REST Webhooks & HMAC Signed Payloads Pro compatible with WordPress Multisite and latest PHP?
Yes, Formidable REST Webhooks & HMAC Signed Payloads Pro is fully tested and supported on PHP 8.0, 8.1, 8.2, and 8.3, WordPress 6.0+, and Gravity Forms 2.7, 2.8, and 2.9+, with full WordPress Multisite (WPMU) compatibility.
What is the refund policy for Formidable REST Webhooks & HMAC Signed Payloads Pro?
GravityHive offers a 30-day risk-free money-back guarantee. If you encounter any technical issues our engineering team cannot resolve, you receive a prompt 100% refund.
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