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 virustotal-apigit 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/virustotal-api)<a href="https://agentmods.dev/skills/liberty91ltd/cti-skills/virustotal-api"><img src="https://agentmods.dev/badge/skills/liberty91ltd/cti-skills/virustotal-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.
<a href="https://agentmods.dev/skills/liberty91ltd/cti-skills/virustotal-api"><img src="https://agentmods.dev/badge/skills/liberty91ltd/cti-skills/virustotal-api.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 | $0.00023 | $0.00828 |
| Opus 5.5 | $0.00009 | $0.00331 |
| Sonnet 5.5 | $0.00005 | $0.00166 |
| Haiku 4.5 | $0.00002 | $0.00083 |
Grade A, and why
virustotal-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 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -s "https://www.virustotal.com/api/v3/files/{hash}" \ How it starts
The opening of the file, as written. The whole thing — 101 lines — stays where its author put it; the contents beside it link to each section on GitHub.
VirusTotal API v3
Base URL
https://www.virustotal.com/api/v3
Authentication
Header: x-apikey: $VIRUSTOTAL_API_KEY
Check for key: echo $VIRUSTOTAL_API_KEY
If empty, inform the user to run scripts/setup.sh or set the environment variable.
Rate Limits
- Free: 4 requests/minute, 500/day, 15.5K/month
- Premium: 1000 requests/minute
Key Endpoints
File Analysis
# Lookup by hash (MD5, SHA-1, SHA-256)
curl -s "https://www.virustotal.com/api/v3/files/{hash}" \
-H "x-apikey: $VIRUSTOTAL_API_KEY"
Useful response fields:
data.attributes.last_analysis_stats— detection counts (malicious, suspicious, undetected)data.attributes.popular_threat_classification— malware familydata.attributes.names— file namesdata.attributes.type_description— file typedata.attributes.size— file sizedata.attributes.tags— behavioral tagsdata.attributes.sandbox_verdicts— sandbox results
IP Address
curl -s "https://www.virustotal.com/api/v3/ip_addresses/{ip}" \
-H "x-apikey: $VIRUSTOTAL_API_KEY"
Useful fields: last_analysis_stats, as_owner, country, reputation, last_https_certificate
Relationships (communicating files, downloaded files, URLs):
curl -s "https://www.virustotal.com/api/v3/ip_addresses/{ip}/communicating_files?limit=10" \
-H "x-apikey: $VIRUSTOTAL_API_KEY"
Domain
curl -s "https://www.virustotal.com/api/v3/domains/{domain}" \
-H "x-apikey: $VIRUSTOTAL_API_KEY"
Useful fields: last_analysis_stats, registrar, creation_date, last_dns_records, reputation, categories
URL
URLs must be base64-encoded (without trailing =):
URL_ID=$(echo -n "https://example.com/path" | base64 | tr -d '=')
curl -s "https://www.virustotal.com/api/v3/urls/$URL_ID" \
-H "x-apikey: $VIRUSTOTAL_API_KEY"
Common Query Patterns
Quick reputation check (any indicator type)
Return a summary: detection ratio, community score, key context.
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 · 101 lines · 23 tokens per session scan A 54594bedc8e4
virustotal-api is a skill published in the GitHub repository Liberty91LTD/cti-skills (36 stars, last pushed 4d ago), licensed MIT. It adds 23 tokens to every session and 828 once invoked, about $0.0001 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 2026-09-03.
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