Show HN: Danube – AI Tools Marketplace
TL;DR
Danube is a new marketplace where AI agents can discover and execute tools, and developers can publish and monetize them.
Key Points
- Core security pitch: agents call tools without ever seeing the stored API keys – credentials are held server-side.
- One single MCP connection covers all clients; set it up once and it works across Cursor, Claude Code, and other tools without reconfiguration.
- Developers upload an OpenAPI spec or MCP server, optionally set pricing, and go live immediately – agents can find tools without manual user configuration.
- Over 100 services available today; no signup required to browse.
Nauti's Take
The idea is solid and the pain point is real – anyone working seriously across multiple agent clients knows the key-management chaos. That said, Danube solves a security problem by creating a new one: all credentials now sit with a single, unproven vendor.
That is not a dealbreaker, but it is the first question any reasonable user will ask. The business model – tool monetization via a central marketplace – follows App Store logic for agents, which conceptually makes sense.
The real question is whether a critical mass of tool developers shows up before the major players (Anthropic, OpenAI, Microsoft) solve this themselves.
Sources