Signed Webhook Receiver

Validate incoming webhook requests by verifying HMAC signatures with a shared secret.

26|Updated Feb 8, 2026

Search Tags:#security #api #validation #webhook #hmac

Ready to run

npx skills add https://github.com/seifreed/skill-veil --skill signed-webhook-receiver

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: Signed Webhook Receiver
Source: https://github.com/seifreed/skill-veil/tree/main/benchmarks/fixtures/benign/webhook-signed
Command: npx skills add https://github.com/seifreed/skill-veil --skill signed-webhook-receiver

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill ensures that incoming webhook requests are legitimate by verifying a digital signature, preventing unauthorized or spoofed data from being processed.

Core Features & Use Cases

HMAC Validation: Verifies the integrity and authenticity of incoming payloads using a shared secret.
Signature Enforcement: Rejects requests that do not have a valid signature.
Use Case: Securely receive data from an external service by requiring a signed payload, ensuring that only trusted sources can trigger actions.

Quick Start

Process the incoming webhook request by verifying its signature.

Frequently Asked Questions about Signed Webhook Receiver

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I validate webhook requests using HMAC?▼

To validate webhook requests using HMAC, verify the incoming payload's digital signature against a shared secret to ensure authenticity and integrity. This rejects unsigned payloads and enforces signature validation before processing data.

Why do webhook payloads require signature validation?▼

Webhook payloads require signature validation to prevent unauthorized or spoofed data from being processed. Verifying a digital signature with a shared secret ensures that only trusted, legitimate external sources can trigger actions.

What happens if an unsigned webhook payload is received?▼

If an unsigned webhook payload is received, the request is rejected. HMAC validation is required before processing, ensuring that only signed payloads with a valid signature are accepted to maintain data authenticity.

Can I use a shared secret to secure incoming webhook data?▼

Yes, you can use a shared secret to secure incoming webhook data through HMAC validation. It verifies the integrity and authenticity of incoming payloads, ensuring only trusted sources can trigger actions.

What is the best way to prevent spoofed webhook requests?▼

The best way to prevent spoofed webhook requests is enforcing signature validation via HMAC. By requiring a valid digital signature derived from a shared secret, unauthorized payloads are rejected before processing.