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.
Context
MCP has emerged as the de facto standard for tool integration in AI agents – but setup remains fragmented and API key management is a genuine security headache. Danube targets exactly that gap: a centralized credential store combined with a searchable tool catalog could significantly accelerate agent workflow adoption. For developers, it opens a new monetization path beyond classic SaaS models.
Whether the market will trust a third party with sensitive credentials is the key open question.
Sources