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 deploying-custom-domain-rest-apigit 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/deploying-custom-domain-rest-api)<a href="https://agentmods.dev/skills/aws/agent-toolkit-for-aws/deploying-custom-domain-rest-api"><img src="https://agentmods.dev/badge/skills/aws/agent-toolkit-for-aws/deploying-custom-domain-rest-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/aws/agent-toolkit-for-aws/deploying-custom-domain-rest-api"><img src="https://agentmods.dev/badge/skills/aws/agent-toolkit-for-aws/deploying-custom-domain-rest-api.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk warn
- NVIDIA SkillSpector warn
SkillSpector: 2 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Data Exfiltration · line 213 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
- medium Data Exfiltration · line 216 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
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 | $0.00100 | $0.04527 |
| Opus 5 | $0.00050 | $0.02263 |
| Sonnet 5 | $0.00020 | $0.00905 |
| Haiku 4.5 | $0.00010 | $0.00453 |
Grade A, and why
deploying-custom-domain-rest-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 6d 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.
- You MUST inform the user to test with: `curl 'https://{custom_domain_name}/example?QueryString1=queryValue1' -H 'HeaderAuth1: headerValue1'` How it starts
The opening of the file, as written. The whole thing — 259 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Custom Domain REST API with Lambda and Request Authorizer
Overview
This SOP deploys a REST API with a Regional custom domain name, a Lambda backend function, and a request-based Lambda authorizer. It handles ACM certificate provisioning, IAM role creation, Lambda function deployment, API Gateway REST API creation with a custom authorizer, custom domain configuration, base path mapping, and Route 53 DNS setup.
The architecture includes:
- An API Gateway REST API with an endpoint type of REGIONAL
- A request-based Lambda authorizer that validates headers, query string parameters, and stage variables
- A Lambda backend function at
GET /example - A custom domain name with TLS 1.2
- A base path mapping connecting the custom domain to the API stage
- A Route 53 A-alias record pointing the custom domain to the API Gateway Regional endpoint
Important: This SOP uses Regional endpoints. If the user requests a private endpoint, inform them that this skill covers Regional endpoints only. Private endpoints require VPC endpoint configuration.
Parameters
- custom_domain_name (required): Fully qualified domain name for the API (e.g.,
api.example.com) - region (required): AWS Region for all resources. The ACM certificate must be in this same Region for Regional endpoints
- hosted_zone_id (required): Route 53 hosted zone ID for the domain
- acm_certificate_arn (optional): ARN of an existing ACM certificate covering the custom domain. If not provided, Step 2 creates one
- stage_name (optional, default: "dev"): API Gateway stage name
Constraints for parameter acquisition:
- You MUST ask for all required parameters upfront in a single prompt rather than one at a time
- You MUST support multiple input methods (direct input, file path, URL)
- You MUST confirm successful acquisition of all parameters before proceeding
- You MUST inform the user that this skill uses hardcoded demo authorization values (headerValue1, queryValue1, stageValue1) that are NOT suitable for production. For production, use AWS Secrets Manager or Systems Manager Parameter Store to manage authorization credentials. See: https://docs.aws.amazon.com/secretsmanager/latest/userguide/intro.html
- You MUST validate that custom_domain_name is a valid FQDN
What ships with it
5 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.
- 6d ago First seen · 259 lines · 100 tokens per session scan A c4fbc36c4139
deploying-custom-domain-rest-api 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 100 tokens to every session and 4,527 once invoked, about $0.0005 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 2026-09-03.
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