Looking for an alternative to Directory? Whether you need a different runtime environment, custom authentication support, or alternative API integrations in the Knowledge & Memory ecosystem, we have cataloged and compared the top alternative MCP servers below.
This project implements a fault-tolerant, four-layer memory architecture (Chronicle, Active Stream, Hive Mind, Agent Codex) where each layer operates independently so a failure in one doesn't cascade to the others. A dedicated Memory Service running on a local Qwen 3.5 9B model (via Ollama) handles truth extraction, chronicle inscription, semantic indexing (Qdrant + Mem0), and agent codex updates, with Redis and LangGraph handling state persistence and orchestration.
Direct comparison of key metrics, runtimes, authentication methods, and community popularity.
| Server Name | Runtime | Auth | Pricing | GitHub Stars | Downloads | Action |
|---|---|---|---|---|---|---|
| — | No auth required | Free | — | — | Current | |
| npx | API key | Freemium | 2 | 25 | Compare → | |
| npx | No auth required | Free | 61 | 12 | Compare → | |
| npx | No auth required | Free | 43,832 | 1 | Compare → | |
| — | No auth required | Free | 2,810 | 2 | Compare → | |
| npx | API key | Free | 25,365 | — | Compare → | |
| npx | No auth required | Free | 495 | — | Compare → | |
| npx | No auth required | Freemium | 3 | — | Compare → | |
| npx | Other | Bring your own API key (usage-based cost) | 381 | — | Compare → | |
| Remote (SSE) | OAuth | Free | 2 | — | Compare → | |
| npx | API key | Free | 62,369 | — | Compare → | |
| npx | No auth required | Free | 929 | — | Compare → | |
| uvx | No auth required | Free | 217 | — | Compare → |