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.
/plugin marketplace add hookdeck/webhook-skillsnpx agentmods add plugins/hookdeck/webhook-skills/exact-online-webhooksgit clone --depth 1 https://github.com/hookdeck/webhook-skillsWrote 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.
[](https://agentmods.dev/plugins/hookdeck/webhook-skills/exact-online-webhooks)<a href="https://agentmods.dev/plugins/hookdeck/webhook-skills/exact-online-webhooks"><img src="https://agentmods.dev/badge/plugins/hookdeck/webhook-skills/exact-online-webhooks.svg" alt="Measured on agentmods" height="20"></a>Grade A, and why
exact-online-webhooks 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 today.
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.
What it actually says
{
"name": "exact-online-webhooks",
"description": "Receive and verify Exact Online webhooks. Use when setting up Exact Online webhook handlers, debugging HashCode signature verification, subscribing to topics via the WebhookSubscriptions REST endpoint, or handling entity change events like Accounts, Items, StockPositions, FinancialTransactions, GoodsDeliveries, and Contacts. Note: Exact does NOT use Standard Webhooks — the signature is a HashCode field inside the JSON body (HMAC-SHA256 over the Content node, hex, uppercased), not an HTTP header.",
"source": "./skills/exact-online-webhooks",
"strict": false,
"skills": [
"./"
],
"category": "integration",
"license": "MIT",
"author": {
"name": "Hookdeck",
"email": "[email protected]"
},
"repository": "https://github.com/hookdeck/webhook-skills",
"homepage": "https://github.com/hookdeck/webhook-skills/tree/main/skills/exact-online-webhooks",
"keywords": [
"webhooks",
"exact",
"online"
]
}What ships with it
1 file beside marketplace.json#exact-online-webhooks in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- today First seen · 22 lines scan A 19f84b1c8e37
exact-online-webhooks is a plugin published in the GitHub repository hookdeck/webhook-skills (84 stars, last pushed today), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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