# Aws S3

> A Claude skill from ashish7802/awesome-api-skills.

- **Type:** Skill
- **Install:** `agentstack add skill-ashish7802-awesome-api-skills-aws-s3`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [ashish7802](https://agentstack.voostack.com/s/ashish7802)
- **Installs:** 0
- **Category:** [Cloud & Infrastructure](https://agentstack.voostack.com/c/cloud-infrastructure)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [ashish7802](https://github.com/ashish7802)
- **Source:** https://github.com/ashish7802/awesome-api-skills/tree/master/skills/aws-s3

## Install

```sh
agentstack add skill-ashish7802-awesome-api-skills-aws-s3
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# AWS S3 API Skill

## Overview
Amazon Simple Storage Service (S3) provides highly scalable object storage. This skill details the AWS SDK v3 for Node.js.

## Installation
```bash
npm install @aws-sdk/client-s3 @aws-sdk/s3-request-presigner
pip install boto3
```

## Authentication
Authenticate via IAM Roles (in EC2/Lambda) or Access Keys (`AWS_ACCESS_KEY_ID`, `AWS_SECRET_ACCESS_KEY`). Avoid hardcoded credentials.

## Core Concepts
- **Bucket**: The root container for objects.
- **Object**: A file and its metadata.
- **Presigned URL**: A temporary URL granting access to upload/download a specific object.

## Common Workflows
1. Instantiate `S3Client`.
2. Construct a `PutObjectCommand`.
3. Send the command to upload a stream or buffer.

## Error Handling
Catch `S3ServiceException`. Common errors include `NoSuchBucket` and `AccessDenied`. Ensure bucket policies and IAM permissions align.

## Security
Block Public Access at the account level. Always use Presigned URLs for client-side uploads rather than routing large files through your API server.

## Rate Limits
S3 automatically scales, but standard performance supports 3,500 PUT/COPY/POST/DELETE and 5,500 GET/HEAD requests per second per prefix.

## Best Practices
Use Multipart Upload for files larger than 100MB. Use random prefixes (like UUIDs) in object keys to avoid thermal hotspots in S3 partitions.

## Troubleshooting
If a presigned URL fails with SignatureDoesNotMatch, ensure the HTTP method and headers exactly match what was requested during generation.

## References
- [API Reference](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/clients/client-s3/)

## Why use this skill
Use this when your agent works with **aws-s3** — structured patterns beat pasted docs and prevent common hallucinations.

## AI pitfalls
- Using outdated SDK or API versions from training data
- Inventing environment variable names
- Omitting error handling and retry logic

## Production checklist
- [ ] Secrets in environment variables, not source code
- [ ] Error handling and logging in place
- [ ] Rate limits and timeouts configured

## Related skills
- [`terraform`](../terraform/SKILL.md) — provisioned by
- [`pulumi`](../pulumi/SKILL.md) — provisioned by

---
> **Last Verified:** 2026-07-02

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [ashish7802](https://github.com/ashish7802)
- **Source:** [ashish7802/awesome-api-skills](https://github.com/ashish7802/awesome-api-skills)
- **License:** MIT

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-ashish7802-awesome-api-skills-aws-s3
- Seller: https://agentstack.voostack.com/s/ashish7802
- Browse the marketplace: https://agentstack.voostack.com/browse

---
Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.