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 censys-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/censys-api)<a href="https://agentmods.dev/skills/liberty91ltd/cti-skills/censys-api"><img src="https://agentmods.dev/badge/skills/liberty91ltd/cti-skills/censys-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/censys-api"><img src="https://agentmods.dev/badge/skills/liberty91ltd/cti-skills/censys-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 | $0.00019 | $0.00664 |
| Opus 5.5 | $0.00008 | $0.00266 |
| Sonnet 5.5 | $0.00004 | $0.00133 |
| Haiku 4.5 | $0.00002 | $0.00066 |
Grade A, and why
censys-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://search.censys.io/api/v2/hosts/{ip}" \ How it starts
The opening of the file, as written. The whole thing — 90 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Censys API v2
Base URL
https://search.censys.io/api/v2
Authentication
Basic Auth: $CENSYS_API_ID:$CENSYS_API_SECRET
curl -s "https://search.censys.io/api/v2/hosts/{ip}" \
-u "$CENSYS_API_ID:$CENSYS_API_SECRET"
Rate Limits
- Free: 250 queries/month, 5 results/query
- Paid: Higher limits based on plan
Important: Free tier is very limited. Use selectively — prioritise high-value lookups.
Key Endpoints
View Host
curl -s "https://search.censys.io/api/v2/hosts/{ip}" \
-u "$CENSYS_API_ID:$CENSYS_API_SECRET"
Useful fields:
result.services[]— port, service_name, transport_protocol, bannerresult.services[].tls.certificates— TLS certificate chainresult.autonomous_system— ASN inforesult.location— geographic locationresult.operating_system— OS detectionresult.last_updated_at— scan freshness
Search Hosts
curl -s "https://search.censys.io/api/v2/hosts/search?q={query}" \
-u "$CENSYS_API_ID:$CENSYS_API_SECRET"
Search syntax: services.port: 443 AND services.tls.certificates.leaf_data.subject.common_name: example.com
View Certificate
curl -s "https://search.censys.io/api/v2/certificates/{fingerprint}" \
-u "$CENSYS_API_ID:$CENSYS_API_SECRET"
Common Search Queries
ip: {ip}— specific hostservices.tls.certificates.leaf_data.subject.common_name: {domain}— hosts with cert for domainservices.http.response.body_hash: {hash}— hosts serving same contentservices.jarm.fingerprint: {jarm}— hosts with same JARM fingerprint (C2 detection)labels: {label}— Censys-labeled hosts
CTI Value
Censys excels at:
- Certificate transparency analysis (finding related infrastructure)
- JARM fingerprinting (identifying C2 frameworks)
- Service banner analysis
- Historical infrastructure changes
Response Summary Format
ip: <IP>
services:
- port: <port>
service: <name>
banner: <truncated>
certificates:
- subject_cn: <common name>
issuer: <issuer>
valid_from: <date>
valid_to: <date>
autonomous_system:
asn: <number>
name: <name>
location:
country: <country>
city: <city>
last_updated: <date>
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 · 90 lines · 19 tokens per session scan A 36b6b333d058
censys-api is a skill published in the GitHub repository Liberty91LTD/cti-skills (36 stars, last pushed 4d ago), licensed MIT. It adds 19 tokens to every session and 664 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 2026-08-30.
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