Agent Toolkit for AWS is a collection of AWS-supported MCP servers, skills, plugins, commands, and hooks that help AI coding agents build, deploy, and manage applications on AWS. It is used by developers working with AWS services through agents such as Claude Code, Codex, Cursor, and Kiro. The catalogue entries are the toolkit's own agent extensions for AWS development and operations.
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/agent-toolkit-for-aws --skill aws-lambda-managed-instancesgit clone --depth 1 https://github.com/aws/agent-toolkit-for-awsWrote 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/agent-toolkit-for-aws/aws-lambda-managed-instances)<a href="https://agentmods.dev/skills/aws/agent-toolkit-for-aws/aws-lambda-managed-instances"><img src="https://agentmods.dev/badge/skills/aws/agent-toolkit-for-aws/aws-lambda-managed-instances/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/agent-toolkit-for-aws/aws-lambda-managed-instances"><img src="https://agentmods.dev/badge/skills/aws/agent-toolkit-for-aws/aws-lambda-managed-instances.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk warn
- NVIDIA SkillSpector pass
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 | $0.00189 | $0.03414 |
| Opus 5 | $0.00095 | $0.01707 |
| Sonnet 5 | $0.00038 | $0.00683 |
| Haiku 4.5 | $0.00019 | $0.00341 |
Grade A, and why
aws-lambda-managed-instances scanned grade A with 0 findings 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 yesterday.
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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 201 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AWS Lambda Managed Instances (LMI)
Runs Lambda functions on EC2 instances in the user's account while AWS manages provisioning, patching, scaling, routing, and load balancing. Combines Lambda's developer experience with EC2's pricing and hardware options.
Works best with the AWS MCP server for sandboxed CLI execution and audit logging. All guidance also works with standard AWS CLI or SAM CLI.
Note: Confirm regional availability, quotas, and instance type offerings against current AWS documentation before production deployment.
Quick Decision: Is LMI Right for This Workload?
| Signal | LMI is a strong fit | Standard Lambda is better |
|---|---|---|
| Traffic | Steady, predictable, 50M+ req/mo | Bursty, unpredictable, long periods of no traffic |
| Duration | Long-running asynchronous/ESM jobs that exceed 15 min (up to 90 min on LMI): ETL/data processing, media transcoding, ML inference, financial calc, web scraping | Short invocations; synchronous work needing >15 min (not supported on any Lambda) |
| Cost | Duration-heavy spend at scale | Low or sporadic invocations |
| Cold starts | Unacceptable (LMI eliminates for provisioned capacity) | Tolerable |
| Compute | Latest CPUs, specific families, high network bandwidth, GPU requirements | Standard Lambda memory/CPU sufficient |
| Isolation | Dedicated EC2 instances in your account, full VPC control | Shared Firecracker micro-VMs acceptable |
| Scale-to-zero | Does not scale to zero but can create custom schedules with AWS provided solutions | Required (pay nothing when idle) |
| Code readiness | Thread-safe (Node.js/Java/.NET) or any Python code | Non-thread-safe code, expensive to change |
Routing
Read ONLY the single reference file that matches the user's task. Do not preload multiple references.
| User need | Action |
|---|---|
| Cost comparison, pricing analysis, Savings Plans, Reserved Instances | Read cost-comparison.md |
| Instance types, memory sizing, vCPU ratios, scaling tuning, capacity provider config | Read configuration-guide.md |
| Thread safety, concurrency model, code review checklist, multi-concurrency readiness | Read thread-safety.md |
| Before/after code examples, runtime-specific migration, connection pooling | Read migration-patterns.md |
| IAM roles, VPC setup, CLI commands, SAM template, CDK example | Read infrastructure-setup.md |
| Errors, throttling, debugging, stuck deployments | Read troubleshooting.md |
What ships with it
7 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.
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.
- yesterday Changed · +23 lines · +66 tokens per session 8f17edb1e6e8
- 6d ago First seen · 178 lines · 123 tokens per session scan A 89d08566cc93
aws-lambda-managed-instances is a skill published in the GitHub repository aws/agent-toolkit-for-aws (2,569 stars, last pushed yesterday), licensed Apache-2.0. It adds 189 tokens to every session and 3,414 once invoked, about $0.0009 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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