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.
npx agentmods add skills/hookdeck/webhook-skills/ashby-webhooksnpx skills add hookdeck/webhook-skills --skill ashby-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/skills/hookdeck/webhook-skills/ashby-webhooks)<a href="https://agentmods.dev/skills/hookdeck/webhook-skills/ashby-webhooks"><img src="https://agentmods.dev/badge/skills/hookdeck/webhook-skills/ashby-webhooks.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00050 | $0.01474 |
| Opus 5 | $0.00025 | $0.00737 |
| Sonnet 5 | $0.00010 | $0.00295 |
| Haiku 4.5 | $0.00005 | $0.00147 |
Grade A, and why
ashby-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 3d 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.
This is a copy
83% identical to adyen-webhooks — 167 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 140 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Ashby Webhooks
When to Use This Skill
- How do I receive Ashby webhooks?
- How do I verify the Ashby-Signature header?
- How do I handle applicationSubmit, candidateHire, or interviewScheduleCreate events?
- Why is my Ashby webhook signature verification failing?
Verification (core)
Ashby signs the raw request body with HMAC-SHA256 keyed on your per-webhook
secret token and sends the digest in the Ashby-Signature header formatted as
sha256=<hex>. There is no official SDK, so verify manually: compute the HMAC
over the raw body (before JSON parsing) and compare the hex digest timing-safe.
The event name is in the body, not a header — every payload is
{ "action": "<eventName>", "data": {...} }.
Node:
const crypto = require('crypto');
function verifyAshbyWebhook(rawBody, signatureHeader, secret) {
const [algo, sig] = (signatureHeader || '').split('=');
if (algo !== 'sha256' || !sig) return false;
const expected = crypto.createHmac('sha256', secret).update(rawBody).digest('hex');
try {
return crypto.timingSafeEqual(Buffer.from(sig, 'hex'), Buffer.from(expected, 'hex'));
} catch {
return false;
}
}
Python:
import hmac, hashlib
def verify_ashby_webhook(raw_body: bytes, signature_header: str, secret: str) -> bool:
algo, _, sig = (signature_header or "").partition("=")
if algo != "sha256" or not sig:
return False
expected = hmac.new(secret.encode(), raw_body, hashlib.sha256).hexdigest()
return hmac.compare_digest(sig, expected)
For complete handlers with route wiring, event dispatch, and tests, see:
Common Event Types
The action field carries the event name (camelCase, no dot notation).
Event (action) |
Triggered When |
|---|---|
ping |
Test event sent when a webhook is created or edited |
applicationSubmit |
A candidate submits an application |
applicationUpdate |
An application changes (stage, status, fields) |
candidateHire |
A candidate is marked hired |
candidateStageChange |
A candidate moves to a new interview stage |
interviewScheduleCreate |
An interview schedule is created |
offerCreate |
An offer is created |
What ships with it
19 files beside SKILL.md 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.
- examples/express/.env.example 128 B
- examples/express/package.json 366 B
- examples/express/README.md 1.2 KB
- examples/express/src/index.js 4.4 KB runs code
- examples/express/test/webhook.test.js 5.2 KB runs code
- examples/fastapi/.env.example 128 B
- examples/fastapi/main.py 3.8 KB runs code
- examples/fastapi/README.md 1.3 KB
- examples/fastapi/requirements.txt 82 B
- examples/fastapi/test_webhook.py 5.3 KB runs code
- examples/nextjs/.env.example 128 B
- examples/nextjs/app/webhooks/ashby/route.ts 3.6 KB runs code
- examples/nextjs/package.json 478 B
- examples/nextjs/README.md 1.1 KB
- examples/nextjs/test/webhook.test.ts 3.6 KB runs code
- examples/nextjs/vitest.config.ts 140 B runs code
- references/overview.md 3.5 KB
- references/setup.md 2.4 KB
- references/verification.md 5.3 KB
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.
- 3d ago First seen · 140 lines · 50 tokens per session scan A db2690fa3942
ashby-webhooks is a skill published in the GitHub repository hookdeck/webhook-skills (84 stars, last pushed 7d ago), licensed MIT. It adds 50 tokens to every session and 1,474 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. It is 83% identical to adyen-webhooks, differing in 167 lines, and is treated as a copy.
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