AgentSkillsCN

Send Me My Files - R2 upload with short lived signed urls

将文件上传到Cloudflare R2、AWS S3或任何兼容S3的存储，并生成可配置过期时间的安全预签名下载链接。

SKILL.md
--- frontmatter
name: Send Me My Files - R2 upload with short lived signed urls
description: Upload files to Cloudflare R2, AWS S3, or any S3-compatible storage and generate secure presigned download links with configurable 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):

yaml
# 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

yaml
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

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

Upload with custom path

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

Upload to specific bucket

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

Custom expiration (default: 5 minutes)

bash
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)

bash
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