Claude Projects = context. Promptibus = capability. Different things, stack them.
Claude Projects is Anthropic's Claude-Desktop feature that bundles a system prompt + uploaded knowledge files into a reusable workspace. It's great for 'I always want Claude to know about my company's coding style'. Promptibus MCP is a tool layer that gives any MCP-compatible agent (Claude Desktop, Cursor, Continue, etc.) the ability to call 80+ AI models with cost-aware routing + prompt optimization. Different problems entirely — Claude Projects manages CONTEXT, Promptibus extends CAPABILITY.
Use Claude Projects to give Claude your codebase / docs / style guide as persistent context. Add Promptibus MCP to that Project for multi-model AI generation capability.
| Feature | Promptibus | Claude Projects |
|---|---|---|
| Primary function | Multi-model tool layer | Claude system prompt + knowledge container |
| Scope | Any MCP client (Claude / Cursor / Continue / Zed / Windsurf / n8n) | Claude Desktop only |
| Model coverage | 80+ models across all major vendors | Claude only |
| Persistent context | No (stateless tool calls) | Yes (knowledge files + system prompt) |
| Cost-aware routing | Yes (picks cheapest model) | N/A (Claude only) |
| Multi-modal | Image / video / audio / text / code | Text (some image input) |
| Setup | One MCP config snippet | Built into Claude Desktop UI |
These are completely complementary. Inside a Claude Project, add Promptibus MCP via `claude_desktop_config.json`. Now Claude has your persistent context AND the ability to call 80+ models. Best of both.
Free tier: 100 calls/day. No credit card.