Auditable, self-improving knowledge & memory for AI agents over MCP — citation-enforced answers and a replayable why-trace, self-hosted on Postgres.
Auditable, self-improving knowledge & memory for AI agents over MCP — citation-enforced answers and a replayable why-trace, self-hosted on Postgres.
Grounded answers with provable citations, a full why-trace for every answer, and a corpus that improves itself — served to any agent over MCP. Zero-key, multilingual, and self-hostable on Postgres alone.
Compare MCP servers by category, or browse hosted MCP servers if you prefer an endpoint over a local process.
| Variable | Description | Required |
|---|---|---|
| OPENAI_API_KEY | Credential the server authenticates with. | Yes |
| MCP_API_KEY | Credential the server authenticates with. | Yes |
| CHAT_BASE_URL | Endpoint or connection string the server talks to. | Yes |
| CHAT_API_KEY | Credential the server authenticates with. | Yes |
| AUTH_SECRET | Credential the server authenticates with. | Yes |
| DATABASE_URL | Endpoint or connection string the server talks to. | Yes |
Inspect PostgreSQL schemas and run read-only queries with the archived MCP reference server. Review its maintenance status before choosing it.
Connect the Notion MCP server to search workspace content and work with pages and databases through Notion’s hosted OAuth service.
Use the Supabase MCP server to inspect database schemas, query project data and retrieve docs through a project-scoped connection.
Query, modify and analyse local SQLite databases in conversation — the fastest way to chat with a data file.
Metabase ships its own MCP endpoint — search your BI content, build and run queries, and save questions and dashboards without leaving the chat.
Official MongoDB server covering data, schemas and Atlas management — from find queries to spinning up clusters.