Awesome-openclaw-skills send-me-my-files-r2-upload-with-short-lived-signed-urls

Upload files to Cloudflare R2, AWS S3, or any S3-compatible storage and generate secure presigned download links with configurable expiration.

install

source · Clone the upstream repo

git clone https://github.com/sundial-org/awesome-openclaw-skills

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/sundial-org/awesome-openclaw-skills "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/send-me-my-files-r2-upload-with-short-lived-signed-urls" ~/.claude/skills/sundial-org-awesome-openclaw-skills-send-me-my-files-r2-upload-with-short-lived- && rm -rf "$T"

OpenClaw · Install into ~/.openclaw/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/sundial-org/awesome-openclaw-skills "$T" && mkdir -p ~/.openclaw/skills && cp -r "$T/skills/send-me-my-files-r2-upload-with-short-lived-signed-urls" ~/.openclaw/skills/sundial-org-awesome-openclaw-skills-send-me-my-files-r2-upload-with-short-lived- && rm -rf "$T"

manifest: skills/send-me-my-files-r2-upload-with-short-lived-signed-urls/SKILL.md

source content

Send Me My Files - R2 Upload with Short Lived Signed URLs

Upload files to Cloudflare R2 or any S3-compatible storage and generate presigned download links.

Features

Upload files to R2/S3 buckets
Generate presigned download URLs (configurable expiration)
Support for any S3-compatible storage (R2, AWS S3, MinIO, etc.)
Multiple bucket configurations
Automatic content-type detection

Configuration

Create

~/.r2-upload.yml

(or set

R2_UPLOAD_CONFIG

env var):

# Default bucket (used when no bucket specified)
default: my-bucket

# Bucket configurations
buckets:
  my-bucket:
    endpoint: https://abc123.r2.cloudflarestorage.com
    access_key_id: your_access_key
    secret_access_key: your_secret_key
    bucket_name: my-bucket
    public_url: https://files.example.com  # Optional: custom domain
    region: auto  # For R2, use "auto"
    
  # Additional buckets
  personal:
    endpoint: https://xyz789.r2.cloudflarestorage.com
    access_key_id: ...
    secret_access_key: ...
    bucket_name: personal-files
    region: auto

Cloudflare R2 Setup

Go to Cloudflare Dashboard → R2
Create a bucket

Go to R2 API Tokens:

https://dash.cloudflare.com/<ACCOUNT_ID>/r2/api-tokens

Create a new API token
- Important: Apply to specific bucket (select your bucket)
- Permissions: Object Read & Write
Copy the Access Key ID and Secret Access Key

Use endpoint format:

https://<account_id>.r2.cloudflarestorage.com

Set
```
region: auto
```

AWS S3 Setup

aws-bucket:
  endpoint: https://s3.us-east-1.amazonaws.com
  access_key_id: ...
  secret_access_key: ...
  bucket_name: my-aws-bucket
  region: us-east-1

Usage

Upload a file

r2-upload /path/to/file.pdf
# Returns: https://files.example.com/abc123/file.pdf?signature=...

Upload with custom path

r2-upload /path/to/file.pdf --key uploads/2026/file.pdf

Upload to specific bucket

r2-upload /path/to/file.pdf --bucket personal

Custom expiration (default: 5 minutes)

r2-upload /path/to/file.pdf --expires 24h
r2-upload /path/to/file.pdf --expires 1d
r2-upload /path/to/file.pdf --expires 300  # seconds

Public URL (no signature)

r2-upload /path/to/file.pdf --public

Tools

```
r2_upload
```
- Upload file and get presigned URL
```
r2_list
```
- List recent uploads
```
r2_delete
```
- Delete a file

Environment Variables

```
R2_UPLOAD_CONFIG
```
- Path to config file (default:
```
~/.r2-upload.yml
```
)
```
R2_DEFAULT_BUCKET
```
- Override default bucket
```
R2_DEFAULT_EXPIRES
```
- Default expiration in seconds (default: 300 = 5 minutes)

Notes

Uploaded files are stored with their original filename unless
```
--key
```
is specified
Automatic UUID prefix added to prevent collisions (e.g.,
```
abc123/file.pdf
```
)
Content-Type automatically detected from file extension
Presigned URLs expire after the configured duration