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 amazon-eventbridge-event-busgit 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/amazon-eventbridge-event-bus)<a href="https://agentmods.dev/skills/aws/agent-toolkit-for-aws/amazon-eventbridge-event-bus"><img src="https://agentmods.dev/badge/skills/aws/agent-toolkit-for-aws/amazon-eventbridge-event-bus/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/amazon-eventbridge-event-bus"><img src="https://agentmods.dev/badge/skills/aws/agent-toolkit-for-aws/amazon-eventbridge-event-bus.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk 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 | $0.00194 | $0.07898 |
| Opus 5.5 | $0.00078 | $0.03159 |
| Sonnet 5.5 | $0.00039 | $0.01580 |
| Haiku 4.5 | $0.00019 | $0.00790 |
Grade A, and why
amazon-eventbridge-event-bus 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 20d 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.
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 — 515 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Building with the new EventBridge custom event buses
Overview
The new EventBridge custom event bus routes events and retains them. You publish with one of two APIs, and subscribers filter, optionally transform, and deliver each matching event to one target.
Read chapters 5 and 6 before writing any filter, transformer, or target parameter. The two publish APIs deliver different payload shapes, and an expression written for one silently matches nothing against the other.
Publish metrics are on by default, so you can always tell whether events reached a bus. Subscriber logs are off by default, so turn them on before you debug a delivery rather than after (chapter 18).
Works best with the AWS MCP server, which is recommended for running the CLI calls in this skill: it executes them in a sandboxed environment with audit logging. All guidance also works with standard AWS CLI access.
Conventions
The key words MUST, MUST NOT, SHOULD, and MAY in this skill are to be interpreted as described in RFC 2119. They appear only in decision procedures, where following the wrong course either breaks the configuration or loses events silently. MUST marks an absolute requirement, SHOULD a strong recommendation you may have a specific reason to set aside, and MAY a genuine option.
Everything else is ordinary description. A sentence stating how the service behaves carries no keyword, because it is a fact rather than an instruction to you.
When not to use this skill
This skill is only about the new custom event buses, the service you reach with the eventsv2 CLI
and the eventbridgev2 SDK clients. It does not cover:
- Classic EventBridge, meaning the
eventsAPI with rules, targets, archives, and event patterns onAWS::Events::Rule. The two services share theevents:IAM namespace and some vocabulary, which is exactly why they are easy to confuse. If you are writing a rule, you are not on a new bus. Chapter 3 maps the concepts across if you are migrating. - EventBridge Pipes, Scheduler, and Schemas (the classic schema registry and its discovery feature). Different APIs.
- Configuring the Firehose service itself, such as buffering hints or record transformation. A Firehose delivery stream is a valid subscriber target; chapter 9 covers that side of it.
What ships with it
17 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/authorization.md 17 KB
- references/cloudevents.md 3.7 KB
- references/code-samples.md 13 KB
- references/cost-and-quotas.md 7.0 KB
- references/delivery-troubleshooting.md 22 KB
- references/event-sources.md 19 KB
- references/filters-and-expressions.md 11 KB
- references/infrastructure-as-code.md 8.1 KB
- references/migrating-from-classic.md 6.3 KB
- references/observability.md 16 KB
- references/provisioning-and-state.md 5.0 KB
- references/replay-and-recovery.md 4.6 KB
- references/schema-registries.md 5.5 KB
- references/security-and-sharing.md 6.7 KB
- references/setup-walkthroughs.md 8.9 KB
- references/target-configuration.md 15 KB
- references/target-contract.md 44 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.
- 20d ago Changed 9de3f2699653
- 21d ago First seen · 515 lines · 194 tokens per session scan A d5ae44fe31b3
amazon-eventbridge-event-bus is a skill published in the GitHub repository aws/agent-toolkit-for-aws (2,886 stars, last pushed yesterday), licensed Apache-2.0. It adds 194 tokens to every session and 7,898 once invoked, about $0.0008 per session on Opus 5.5. 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 2026-09-25.
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