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 Liberty91LTD/cti-skills --skill ip-investigationgit clone --depth 1 https://github.com/Liberty91LTD/cti-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/liberty91ltd/cti-skills/ip-investigation)<a href="https://agentmods.dev/skills/liberty91ltd/cti-skills/ip-investigation"><img src="https://agentmods.dev/badge/skills/liberty91ltd/cti-skills/ip-investigation/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/liberty91ltd/cti-skills/ip-investigation"><img src="https://agentmods.dev/badge/skills/liberty91ltd/cti-skills/ip-investigation.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 | $0.00081 | $0.01963 |
| Opus 5.5 | $0.00032 | $0.00785 |
| Sonnet 5.5 | $0.00016 | $0.00393 |
| Haiku 4.5 | $0.00008 | $0.00196 |
Grade A, and why
ip-investigation 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 2mo 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.
How it starts
The opening of the file, as written. The whole thing — 171 lines — stays where its author put it; the contents beside it link to each section on GitHub.
ip-investigation
Investigate an IP address end-to-end. Chain multiple lookup-* skills, consolidate results, prioritize follow-up IOCs, and return a rated investigation summary. You invoke skills — you don't call APIs directly.
This skill invokes: /lookup-liberty91 (first-party — run first), /lookup-virustotal, /lookup-shodan, /lookup-abuseipdb, /lookup-greynoise, /lookup-otx, optionally /lookup-censys, optionally /lookup-reversinglabs (network threat-intel + sample fan-out), optionally /lookup-crowdstrike (IOC reputation + actor/malware links), optionally /lookup-misp and/or /lookup-opencti (internal correlation), optionally /lookup-sentinel (exposure check in your own telemetry), then /source-assessment, /tlp-guide, /confidence-levels.
When to invoke
- User asks to investigate, check, or enrich an IP
- User pastes an IP and asks "what is this?" / "is this malicious?"
- Another skill hands off an IP indicator for follow-up
- IOC triage pipeline
Inputs
indicator: <IPv4 or IPv6 address>
context: <optional — why is the user asking? where did this come from?>
tlp_ceiling: <optional — CLEAR/GREEN/AMBER/AMBER+STRICT/RED, default AMBER>
Procedure
1. Validate + triage (before spending API quota)
- Reject RFC 1918 / loopback / link-local / documentation-range (192.0.2.0/24, 198.51.100.0/24, 203.0.113.0/24) unless the user specifically asks — these are not public infrastructure and enrichment is wasted
- Check if the IP is already in
data/iocs/— if yes, load existing enrichment and note age - Decide whether to include Censys (skip by default due to 250/month quota)
2. Parallel lookups
Invoke in parallel (agents should batch these calls):
/lookup-liberty91 ioc-lookup <value> # FIRST-PARTY, if $LIBERTY91_API_KEY is set — run first: is this already in your own platform, with what verdict, confidence and TLP?
/lookup-greynoise ip <value> # FAST — filter out noise early
/lookup-virustotal ip <value> # reputation aggregate
/lookup-abuseipdb ip <value> # abuse reports
/lookup-shodan ip <value> # infrastructure fingerprint
/lookup-otx ip <value> # community pulses
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.
- 2mo ago First seen · 171 lines · 81 tokens per session scan A 16888ab49b3e
ip-investigation is a skill published in the GitHub repository Liberty91LTD/cti-skills (36 stars, last pushed 4d ago), licensed MIT. It adds 81 tokens to every session and 1,963 once invoked, about $0.0003 per session on Opus 5.5. 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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