Setup & Installation
Or with the ClawHub CLI, for registry-managed skill folders outside a full OpenClaw workspace:
What This Skill Does
Wraps the blankfiles.com public API to fetch real blank binary files for upload and format testing. Discovers available file formats, filters by type or category, and returns direct download URLs without fabricating or guessing.
Returns verified download URLs from a live API instead of requiring users to manually create or hunt down blank test files.
When to use it
- Testing a file upload endpoint with a real blank PDF
- Checking which image formats a web form accepts
- Getting a blank DOCX to verify document parser behavior
- Listing all available video formats before writing test fixtures
- Confirming MIME type handling in an API integration
Example Workflow
Here's how your AI assistant might use this skill in practice.
User asks: 'I need a blank MP4 file to test my video upload endpoint'
- 1Query GET /api/v1/files/mp4 to check availability
- 2Parse response for matching files and direct URLs
- 3Return the download URL with format and category details
- 4If not found, suggest alternatives from the same video category
format: mp4, category: video, download_url: https://blankfiles.com/..., notes: suitable for upload endpoint smoke tests