Digital Underground
Indie digital products, free sci-fi book & dev marketplace
ProductivityFree#marketplace#productivity#books
Launches Oct 25, 2026 at 00:00 UTC
What is Digital Underground?
Digital Underground is an independent store for digital products: practical apps like Pantry Week meal planning, productivity tools, guides and fiction. Readers can grab our free sci-fi novel Humanity X: Off the Ground at digitalundergroundstore.com/free-book/. Indie developers can list their apps free in our Developer Marketplace at digitalundergroundstore.com/community/.
Digital Underground features
- Free listing submission for independent creators
- Checkout and delivery stay on the maker's site
- Public API for browsing and managing listings
- MCP server support for AI agent integration
- Automated screening followed by human review
- Categories for apps, AI tools, games, books, and templates
Who uses Digital Underground and for what
- Independent developers sharing their latest tools with a targeted audience
- AI researchers distributing locally run models and interfaces
- Creators testing beta software before official release
- Agencies finding vetted third-party integrations and templates
- Automation agents discovering new digital products via API
Digital Underground FAQ
Is the Developer Marketplace free to use?
Yes, listing your project is free. The website does not charge fees for submissions or browsing.
Does the marketplace handle payments?
No. Checkout and delivery stay on the maker's own site, such as Gumroad, Stripe, or their personal website.
How do I submit a product?
You can use the public submission form or call the POST endpoint with a creator API key. New listings require owner approval before going live.
Can AI agents search the listings?
Yes. The site provides an MCP server and OpenAPI spec so agents can search listings, get details, and submit projects programmatically.
What happens after I submit a listing?
Listings are screened automatically and reviewed by a human. They remain pending until the owner approves them.
Comments (0)
No comments yet. Ask the maker a question or share how you would use it.
More Productivity launches
Fast, private voice dictation for Mac and Windows
Discover startups, launch products, and get noticed weekly
Auto-sync dual-system audio to cameras via XML
Free music discovery and in-browser audio tools.
Digital guest services and hotel operations platform
EasemicOpen source · verified
Open-source Android comic reader for your own cloud
