Claude-OSINT is a library of structured skills that guide Claude through external reconnaissance, including methodology, attack-surface analysis, security checks, risk assessment, and related investigative techniques. It is intended for authorized red-team and bug-bounty engagements. The catalogue entries are the project's own Claude skills for these reconnaissance workflows.
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/elementalsouls/claude-osint/org-attack-surfacenpx skills add elementalsouls/Claude-OSINT --skill org-attack-surfacegit clone --depth 1 https://github.com/elementalsouls/Claude-OSINTWrote 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/elementalsouls/claude-osint/org-attack-surface)<a href="https://agentmods.dev/skills/elementalsouls/claude-osint/org-attack-surface"><img src="https://agentmods.dev/badge/skills/elementalsouls/claude-osint/org-attack-surface.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 | $0.00586 | $0.16357 |
| Opus 5 | $0.00293 | $0.08178 |
| Sonnet 5 | $0.00117 | $0.03271 |
| Haiku 4.5 | $0.00059 | $0.01636 |
Grade A, and why
org-attack-surface scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
LEI=$(curl -sk "https://api.gleif.org/api/v1/lei-records?filter[entity.legalName]=Acme%20Corporation&page[size]=1" \ How it starts
The opening of the file, as written. The whole thing — 1,064 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Org Attack Surface — Corporate-Family Footprint Mapping
Companion skills:
osint-methodology(the "how to think" 5-stage recon pipeline this plugs into) andoffensive-osint(the per-host arsenal you run once this skill hands you owned domains/netblocks — see its §14 Public Records and §28 Infrastructure OSINT for the tool directory this skill deepens rather than duplicates). This skill answers a different, upstream question: not "what doesacme.comexpose", but "what does Acme Corporation, the legal entity, own across every domain, netblock, and subsidiary it has — including the parts with no DNS trail back to the seed at all."
0. When to Use / When NOT
Use this skill when:
- The engagement starts from a company name or legal entity, not a domain — you need to derive the domain(s) first, not just enumerate one.
- You need to find an org's subsidiaries, sister brands, or M&A-acquired footprint that a DNS/CT-only sweep of one seed domain would never surface.
- You suspect "dark" IP space — netblocks or ASNs registered to the org's legal entity with no DNS record pointing at them (forgotten datacenter allocations, un-linked M&A infrastructure, IPs that only ever ran raw services).
- You need attribution discipline: every candidate domain/netblock/ASN this skill surfaces carries an explicit, auditable ownership score — never a bare "looks related."
- You are scoping a large or conglomerate engagement and need to prune scope by real corporate ownership before spending recon budget on strangers.
Do NOT use this skill when:
- You already have a confirmed, bounded target list and just need per-host recon — go straight to
offensive-osint. - The target's authorization isn't established — see §1.
- You need active exploitation or post-exploitation — out of scope here and everywhere in this skill family.
1. Authorization & Legal Posture
Same posture as the companion skills: intended for assets the operator owns or has written authorization to assess. This skill is unusually likely to surface entities the operator did NOT ask about (subsidiaries, sister brands, M&A targets) — that is the point, but it sharpens the scope question rather than loosening it.
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.
- 5d ago First seen · 1,064 lines · 586 tokens per session scan A c42d2b490ec0
org-attack-surface is a skill published in the GitHub repository elementalsouls/Claude-OSINT (2,535 stars, last pushed 5d ago), licensed MIT. It adds 586 tokens to every session and 16,357 once invoked, about $0.0029 per session on Opus 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 2026-08-30.
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