analyzing-certificate-transparency-for-phishing

analyzing-certificate-transparency-for-phishing is a skill for Claude Code, Codex from RobotFlow-Labs/skills-repo. It costs 39 tokens per session (2,745 once invoked), scanned A, original, no licence file.

A skill for monitoring Certificate Transparency logs, which publicly record newly issued website security certificates. It uses crt.sh and Certstream to look for phishing domains, lookalike domains, and certificates issued without authorization.

In plain words
What is it for?
Use it to monitor certificate issuance for phishing attempts, domain impersonation, and unauthorized certificates.
Why use it?
It helps detect suspicious websites and unexpected certificates that could imitate or target an organization.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit Use it to monitor certificate issuance for phishing attempts, domain impersonation, and unauthorized certificates.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/robotflow-labs/skills-repo/analyzing-certificate-transparency-for-phishing
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 RobotFlow-Labs/skills-repo --skill analyzing-certificate-transparency-for-phishing
Clone the repo
git clone --depth 1 https://github.com/RobotFlow-Labs/skills-repo

Made for: Claude Code, Codex.

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.

agentmods badge for analyzing-certificate-transparency-for-phishing

README.md
[![agentmods](https://agentmods.dev/badge/skills/robotflow-labs/skills-repo/analyzing-certificate-transparency-for-phishing/github.svg)](https://agentmods.dev/skills/robotflow-labs/skills-repo/analyzing-certificate-transparency-for-phishing)
Your own site
<a href="https://agentmods.dev/skills/robotflow-labs/skills-repo/analyzing-certificate-transparency-for-phishing"><img src="https://agentmods.dev/badge/skills/robotflow-labs/skills-repo/analyzing-certificate-transparency-for-phishing/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.

agentmods 80×15 button for analyzing-certificate-transparency-for-phishing

Your own site · 80×15
<a href="https://agentmods.dev/skills/robotflow-labs/skills-repo/analyzing-certificate-transparency-for-phishing"><img src="https://agentmods.dev/badge/skills/robotflow-labs/skills-repo/analyzing-certificate-transparency-for-phishing.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 39 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,745 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 unknown 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00039 $0.02745
Opus 5 $0.00019 $0.01373
Sonnet 5 $0.00008 $0.00549
Haiku 4.5 $0.00004 $0.00275

Measured 12d ago against content hash cf469ed1d6c8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

analyzing-certificate-transparency-for-phishing 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 12d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/agent.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

resp = requests.get(self.CRT_SH_URL, params=params, timeout=30)
skills/analyzing-certificate-transparency-for-phishing/SKILL.md · 313 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

3 files 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.

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.

  1. 12d ago First seen · 313 lines · 39 tokens per session scan A cf469ed1d6c8

Subscribe to this mod's changes

analyzing-certificate-transparency-for-phishing is a skill published in the GitHub repository RobotFlow-Labs/skills-repo (2 stars, last pushed 5mo ago), with no licence file. It adds 39 tokens to every session and 2,745 once invoked, about $0.0002 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 2026-08-31.

Related

Other skills, from other repositories

analyzing-certificate-transparency-for-phishing

Monitor Certificate Transparency logs using crt.sh and Certstream to detect phishing domains, lookalike certificates, and unauthorized certificate issuance targeting your organization.

mukul975/Anthropic-Cybersecurity-Skills · 39 tokens

analyzing-certificate-transparency-for-phishing

Use when monitor Certificate Transparency logs using crt.sh and Certstream to detect phishing domains, lookalike certificates, and unauthorized certificate issuance targeting your organization. Use when monitoring certificate transparency logs using crt.sh and certstream to detect.

oyi77/1ai-skills · 56 tokens

analyzing-certificate-transparency-for-phishing

Monitor Certificate Transparency logs using crt.sh and Certstream to detect phishing domains, lookalike certificates, and unauthorized certificate issuance targeting your organization.

autohandai/community-skills · 39 tokens

analyzing-certificate-transparency-for-phishing

A guide to monitoring Certificate Transparency logs, public records of issued website security certificates, to find suspicious or unauthorized domains and certificates. It uses crt.sh for historical searches and Certstream for live monitoring.

killvxk/cybersecurity-skills-zh · 53 tokens

analyzing-certificate-transparency-for-phishing

Monitor Certificate Transparency logs using crt.sh and Certstream to detect phishing domains, lookalike certificates, and unauthorized certificate issuance targeting your organization.

26zl/cybersec-toolkit · 39 tokens

analyzing-certificate-transparency-for-phishing

Monitor Certificate Transparency logs using crt.sh and Certstream to detect phishing domains, lookalike certificates, and unauthorized certificate issuance targeting your organization.

plurigrid/asi · 39 tokens