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/johnkozaris/jko-claude-plugins/validate-apinpx skills add johnkozaris/jko-claude-plugins --skill validate-apigit clone --depth 1 https://github.com/johnkozaris/jko-claude-pluginsWrote 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/johnkozaris/jko-claude-plugins/validate-api)<a href="https://agentmods.dev/skills/johnkozaris/jko-claude-plugins/validate-api"><img src="https://agentmods.dev/badge/skills/johnkozaris/jko-claude-plugins/validate-api.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 | $0.00020 | $0.00243 |
| Opus 5 | $0.00010 | $0.00121 |
| Sonnet 5 | $0.00004 | $0.00049 |
| Haiku 4.5 | $0.00002 | $0.00024 |
Grade A, and why
validate-api 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 4d 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.
What it actually says
Validate API
Use $ARGUMENTS or discover the project's Hurl scenarios. Resolve
API_BASE_URL from project configuration. Confirm before contacting production.
Use $TOKEN when present. Otherwise run ${TOKEN_COMMAND:-scripts/get-backend-token.sh};
if that command is absent, route through /backend-validator:get-dev-token.
Confirm the backend is reachable using a project-defined readiness or health surface when one exists. Do not invent an endpoint.
Run the target with the installed Hurl secret-variable interface:
hurl --test \
--secret token="$TOKEN" \
--variable base_url="$API_BASE_URL" \
"$TARGET"
On failure, identify the exact scenario/assertion and distinguish backend, fixture, token, environment, and test defects.
Use the project's existing validation stack rather than replacing it. Load
references/hurl-patterns.md for captures, retries, parallel isolation, and
report-leakage details.
What ships with it
1 file 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.
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.
- 4d ago First seen · 34 lines · 20 tokens per session scan A cb5aab225666
validate-api is a skill published in the GitHub repository johnkozaris/jko-claude-plugins (11 stars, last pushed 7d ago), licensed MIT. It adds 20 tokens to every session and 243 once invoked, about $0.0001 per session on Opus 5. 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 2026-08-30.
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