APEX Skills is a collection of agent skills that provide AWS platform-engineering knowledge and workflows to coding agents. Engineers use it for tasks involving services such as Amazon EKS and Kubernetes. The catalogue entries are its skills and agents.
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 aws-samples/sample-apex-skills --skill ecs-securitygit clone --depth 1 https://github.com/aws-samples/sample-apex-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/aws-samples/sample-apex-skills/ecs-security)<a href="https://agentmods.dev/skills/aws-samples/sample-apex-skills/ecs-security"><img src="https://agentmods.dev/badge/skills/aws-samples/sample-apex-skills/ecs-security/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/aws-samples/sample-apex-skills/ecs-security"><img src="https://agentmods.dev/badge/skills/aws-samples/sample-apex-skills/ecs-security.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 | $0.00230 | $0.06890 |
| Opus 5.5 | $0.00092 | $0.02756 |
| Sonnet 5.5 | $0.00046 | $0.01378 |
| Haiku 4.5 | $0.00023 | $0.00689 |
Grade B, and why
ecs-security scanned grade B 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.
Cloud metadata endpointmediumServer-side request forgery
One request to 169.254.169.254 can return temporary IAM credentials.
- **Encryption** — EBS volumes and ephemeral storage encrypted (Fargate ephemeral storage is AES-256 encrypted by default on **platform version 1.4.0+**); CMK for ECR/EBS/logs under compliance regimes; **lock down IMDS f Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
The source is not reproduced here
Licensed MIT-0
The repository is licensed MIT-0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.
What ships with it
12 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.
- references/audit-logging.md 6.0 KB
- references/compliance-accelerators.md 7.8 KB
- references/compliance-regimes.md 12 KB
- references/encryption-and-secrets.md 6.3 KB
- references/engagement-and-response.md 6.8 KB
- references/identity-and-access.md 14 KB
- references/image-supply-chain.md 6.2 KB
- references/incident-response-and-forensics.md 6.4 KB
- references/network-isolation.md 8.2 KB
- references/runtime-security.md 5.9 KB
- references/shared-responsibility.md 6.8 KB
- references/task-container-hardening.md 7.1 KB
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 Changed 9361d1a92ffb
- 2mo ago First seen · 143 lines · 230 tokens per session scan B 3d28f0155602
ecs-security is a skill published in the GitHub repository aws-samples/sample-apex-skills (92 stars, last pushed today), licensed MIT-0. It adds 230 tokens to every session and 6,890 once invoked, about $0.0009 per session on Opus 5.5. A static security scan graded it B with 1 finding (cloud metadata endpoint). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
ecs-security compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| ecs-securityaws-samples/sample-apex-skills | Skill | 92 | today | MIT-0 | B | 230 | Claude Code, Codex |
| Triage EKS Node NotReadybregman-arie/devops-sre-skills | Skill | 27 | 7mo ago | Apache-2.0 | A | 22 | Claude Code, Codex |
| aws-serverless-patternsseandkendall/kiro-config | Skill | 8 | 11d ago | Apache-2.0 | A | 43 | Claude Code, Codex |
| aws-diagram-htmlseandkendall/kiro-config | Skill | 8 | 11d ago | Apache-2.0 | A | 83 | Claude Code, Codex |
| aws-diagram-pngseandkendall/kiro-config | Skill | 8 | 11d ago | Apache-2.0 | A | 61 | Claude Code, Codex |
| cognito-email-migrationseandkendall/kiro-config | Skill | 8 | 11d ago | Apache-2.0 | A | 57 | Claude Code, Codex |
| deploy-on-awsseandkendall/kiro-config | Skill | 8 | 11d ago | Apache-2.0 | A | 65 | Claude Code, Codex |