What is local-webhook-development?

A rule for testing webhooks locally with Hookdeck. Hookdeck creates a tunnel that forwards incoming online events to a server running on your computer.

Use it when developing webhook handlers locally, for example by forwarding events to port 3000 at a path such as /webhooks.

It keeps webhook testing out of production and gives developers a repeatable alternative to exposing a local server through other tunnel tools. Hookdeck also provides event inspection and retries.

local-webhook-development — Cursor rule for Cursor by hookdeck

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo

git clone --depth 1 https://github.com/hookdeck/agent-skills

Made for: Cursor.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/rules/hookdeck/agent-skills/local-webhook-development/github.svg)](https://agentmods.dev/rules/hookdeck/agent-skills/local-webhook-development)

Your own site

<a href="https://agentmods.dev/rules/hookdeck/agent-skills/local-webhook-development"><img src="https://agentmods.dev/badge/rules/hookdeck/agent-skills/local-webhook-development/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/rules/hookdeck/agent-skills/local-webhook-development"><img src="https://agentmods.dev/badge/rules/hookdeck/agent-skills/local-webhook-development.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 23 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 239 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00023	$0.00239
Opus 5.5	$0.00009	$0.00096
Sonnet 5.5	$0.00005	$0.00048
Haiku 4.5	$0.00002	$0.00024

Measured 1mo ago against content hash 5cd99c58b800, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

local-webhook-development scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

rules/local-webhook-development.mdc · 18 lines

What it actually says