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 skills add hookdeck/webhook-skills --skill wordpress-com-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/wordpress-com-webhooks)<a href="https://agentmods.dev/skills/hookdeck/webhook-skills/wordpress-com-webhooks"><img src="https://agentmods.dev/badge/skills/hookdeck/webhook-skills/wordpress-com-webhooks/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.
<a href="https://agentmods.dev/skills/hookdeck/webhook-skills/wordpress-com-webhooks"><img src="https://agentmods.dev/badge/skills/hookdeck/webhook-skills/wordpress-com-webhooks.svg" alt="Reviewed on agentmods" width="80" 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 5.1 | $0.00160 | $0.03240 |
| Opus 5.5 | $0.00064 | $0.01296 |
| Sonnet 5.5 | $0.00032 | $0.00648 |
| Haiku 4.5 | $0.00016 | $0.00324 |
Grade A, and why
wordpress-com-webhooks scanned grade A with 1 finding 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 18d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl https://public-api.wordpress.com/rest/v1.1/sites/example.wordpress.com/posts/123 How it starts
The opening of the file, as written. The whole thing — 222 lines — stays where its author put it; the contents beside it link to each section on GitHub.
WordPress.com Webhooks
WordPress.com (Automattic's hosted WordPress service) has a native webhooks
feature under Settings → Webhooks, documented at
wordpress.com/support/webhooks/. An
admin picks an action (the hook), ticks the fields to include, and enters a
URL. When the action fires, WordPress.com POSTs the selected fields to that URL.
Three things make this unlike most providers in this repo:
- The deliveries are UNSIGNED. No HMAC, no signature header, no secret, no timestamp, no token, no custom headers, no handshake. The docs describe only three inputs — action, fields, URL — and nothing to verify.
- The body is a flat form-encoded key/value set, not a JSON envelope. No
type, nodataobject, no event id. The discriminator is thehookfield, whose value is the action name. - Only the fields the admin ticked are sent. Every field is optional except
hook— never assume a field is present, and every value arrives as a string.
Not to be confused with
| This skill | Something else |
|---|---|
| WordPress.com Settings → Webhooks (this skill) | WooCommerce — different product, signed with X-WC-Webhook-Signature (HMAC-SHA256, base64). Use woocommerce-webhooks. Never borrow its header or verifier. |
| WordPress.org plugins (WP Webhooks, HookPress, …) — separate software, separate formats. The docs say: "The Webhook settings mentioned on this page do not apply to plugin-enabled sites. Various plugins offer similar functionality." | |
The WordPress.com REST API (public-api.wordpress.com) — an API you call, not webhooks you receive. Useful here only for re-fetching authoritative data. |
|
| Jetpack Forms webhooks — a separate per-form feature, also unsigned. See references/overview.md. |
When to Use This Skill
- How do I receive WordPress.com webhooks?
- How do I verify a WordPress.com webhook signature? (You cannot — there is none.)
- Why is
req.body/await request.json()empty for my WordPress.com webhook? (It isapplication/x-www-form-urlencoded, not JSON.) - How do I handle
publish_post,publish_page, andcomment_post? - How do I secure an unsigned WordPress.com webhook endpoint?
- Why does
publish_postfire repeatedly for the same post ID? - Is
X-WC-Webhook-Signaturea WordPress.com header? (No — that is WooCommerce.)
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 1.0 KB
- examples/express/package.json 428 B
- examples/express/README.md 4.0 KB
- examples/express/src/index.js 9.5 KB runs code
- examples/express/test/webhook.test.js 7.2 KB runs code
- examples/fastapi/.env.example 1.0 KB
- examples/fastapi/main.py 9.9 KB runs code
- examples/fastapi/README.md 4.3 KB
- examples/fastapi/requirements.txt 231 B
- examples/fastapi/test_webhook.py 8.1 KB runs code
- examples/nextjs/.env.example 1.0 KB
- examples/nextjs/app/webhooks/wordpress-com/route.ts 8.5 KB runs code
- examples/nextjs/package.json 538 B
- examples/nextjs/README.md 4.2 KB
- examples/nextjs/test/webhook.test.ts 7.5 KB runs code
- examples/nextjs/vitest.config.ts 140 B runs code
- references/overview.md 7.3 KB
- references/setup.md 6.3 KB
- references/verification.md 8.7 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.
- 18d ago First seen · 222 lines · 160 tokens per session scan A 43a1082c66ea
wordpress-com-webhooks is a skill published in the GitHub repository hookdeck/webhook-skills (92 stars, last pushed yesterday), licensed MIT. It adds 160 tokens to every session and 3,240 once invoked, about $0.0006 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-29.
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