/r2-upload

name: r2-upload
description: "Upload files to Cloudflare R2, AWS S3, or any S3-compatible storage (like MinIO) and generate secure, time-limited presigned download links with configurable expiration, typically set to 5 minutes. Use when the user needs to upload a file to cloud storage and get a shareable link, or mentions R2, S3, presigned URLs, temporary links, or file uploads with expiration."
summary: TypeScript-based MCP skill for uploading files to cloud storage (R2, S3, MinIO) with secure, temporary download links. Features multi-bucket support, interactive onboarding, and 5-minute default expiration.

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

1. Go to Cloudflare Dashboard → R2 2. Create a bucket 3. Go to R2 API Tokens: `https://dash.cloudflare.com/<ACCOUNT_ID>/r2/api-tokens` 4. Create a new API token

• **Important:** Apply to specific bucket (select your bucket)
• Permissions: Object Read & Write

5. Copy the Access Key ID and Secret Access Key 6. Use endpoint format: `https://<account_id>.r2.cloudflarestorage.com` 7. 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