R2 Upload

What it does

When your agent uses it

• The user needs to upload a file to cloud storage and get a shareable link
• Temporary links
• File uploads with expiration

Example prompts

• “/r2-upload”

Requirements

• Node.js

Workflow steps

7 steps, taken from the first numbered list in SKILL.md.

1. 1Go to Cloudflare Dashboard → R2
2. 2Create a bucket
3. 3Go to R2 API Tokens: https://dash.cloudflare.com//r2/api-tokens
4. 4Create a new API token
5. 5Copy the Access Key ID and Secret Access Key
6. 6Use endpoint format: https://.r2.cloudflarestorage.com
7. 7Set region: auto

What it can do on your machine

Read from SKILL.md and the folder at commit e62775c. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Ships script files (TypeScript), which the agent can run.

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  Hosts in commands or code, which the agent is likely to contact:

  • dash.cloudflare.com
  • abc123.r2.cloudflarestorage.com
  • xyz789.r2.cloudflarestorage.com
  • s3.us-east-1.amazonaws.com

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

R2 Upload loads about 886 tokens when it runs. Until then it costs about 94 tokens; SKILL.md has 215 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~94

When it runs · the whole SKILL.md, loaded when a task matches

~886

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from zebbern/claude-code-guide at commit e62775c, republished under its MIT licence (© zebbern). 215 words, ~886 tokens.

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…

# 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

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

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

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

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

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

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

© zebbern, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 10 other files in skills/r2-upload of zebbern/claude-code-guide.

• SKILL.md
• CLAWDHUB.md
• README.md
• SECURITY.md
• _meta.json
• example-config.yml
• package.json
• pnpm-lock.yaml
• src/index.ts
• src/onboard.ts
• tsconfig.json

Open the folder on GitHubat commit e62775c

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in zebbern/claude-code-guide, which our catalogue first saw on October 7, 2026.

• majiayu000/claude-skill-registryskills/api/r2-upload