A reference for using the AlienVault OTX API, a service that shares community-reported information about cyber threats. It covers lookups for IP addresses, domains, file hashes, and URLs.

It helps retrieve reputation, DNS, malware, location, URL, WHOIS, and analysis data for indicators used in security investigations.

It gives developers the endpoint paths, authentication format, and lookup types needed to investigate threat indicators.

otx-api — Skill for Claude Code by Liberty91LTD

Install

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.

Any agent

npx skills add Liberty91LTD/cti-skills --skill otx-api

Clone the repo

git clone --depth 1 https://github.com/Liberty91LTD/cti-skills

Made for: Claude Code.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/liberty91ltd/cti-skills/otx-api/github.svg)](https://agentmods.dev/skills/liberty91ltd/cti-skills/otx-api)

Your own site

<a href="https://agentmods.dev/skills/liberty91ltd/cti-skills/otx-api"><img src="https://agentmods.dev/badge/skills/liberty91ltd/cti-skills/otx-api/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/liberty91ltd/cti-skills/otx-api"><img src="https://agentmods.dev/badge/skills/liberty91ltd/cti-skills/otx-api.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 20 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 804 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00020	$0.00804
Opus 5	$0.00010	$0.00402
Sonnet 5	$0.00004	$0.00161
Haiku 4.5	$0.00002	$0.00080

Measured 9d ago against content hash 873d8098c0ed, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

otx-api 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 9d 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 -s "https://otx.alienvault.com/api/v1/indicators/IPv4/{ip}/general" \

skills/otx-api/SKILL.md · 95 lines

How it starts

The opening of the file, as written. The whole thing — 95 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AlienVault OTX API

Base URL

https://otx.alienvault.com/api/v1

Authentication

Header: X-OTX-API-KEY: $OTX_API_KEY

Rate Limits

10,000 requests/hour

Key Endpoints

IPv4 Indicator

# General info
curl -s "https://otx.alienvault.com/api/v1/indicators/IPv4/{ip}/general" \
  -H "X-OTX-API-KEY: $OTX_API_KEY"

# Reputation
curl -s "https://otx.alienvault.com/api/v1/indicators/IPv4/{ip}/reputation" \
  -H "X-OTX-API-KEY: $OTX_API_KEY"

# Passive DNS
curl -s "https://otx.alienvault.com/api/v1/indicators/IPv4/{ip}/passive_dns" \
  -H "X-OTX-API-KEY: $OTX_API_KEY"

# Associated malware
curl -s "https://otx.alienvault.com/api/v1/indicators/IPv4/{ip}/malware" \
  -H "X-OTX-API-KEY: $OTX_API_KEY"

Domain Indicator

curl -s "https://otx.alienvault.com/api/v1/indicators/domain/{domain}/general" \
  -H "X-OTX-API-KEY: $OTX_API_KEY"

Sections: /general, /geo, /malware, /url_list, /passive_dns, /whois

File Hash Indicator

curl -s "https://otx.alienvault.com/api/v1/indicators/file/{hash}/general" \
  -H "X-OTX-API-KEY: $OTX_API_KEY"

Sections: /general, /analysis

URL Indicator

curl -s "https://otx.alienvault.com/api/v1/indicators/url/{url}/general" \
  -H "X-OTX-API-KEY: $OTX_API_KEY"

Search Pulses

curl -s "https://otx.alienvault.com/api/v1/search/pulses?q={query}" \
  -H "X-OTX-API-KEY: $OTX_API_KEY"

Key Response Fields

pulse_info.count — number of pulses referencing this indicator
pulse_info.pulses[] — pulse details (name, description, tags, TLP, created)
reputation — community reputation score
validation[] — validation results from OTX
passive_dns[] — historical DNS resolutions

CTI Value

OTX provides community-sourced intelligence. High pulse count = widely reported indicator. Useful for:

Corroboration with other sources
Discovering related indicators via pulse associations
Historical passive DNS data
Community context (pulse descriptions explain what the indicator relates to)

Read the full file on GitHub · 95 lines

Changes

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.

9d ago First seen · 95 lines · 20 tokens per session scan A 873d8098c0ed

Subscribe to this mod's changes

otx-api is a skill published in the GitHub repository Liberty91LTD/cti-skills (18 stars, last pushed 1mo ago), licensed MIT. It adds 20 tokens to every session and 804 once invoked, about $0.0001 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 2026-09-03.

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