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Halfnine MCP
Lets agents use PostgreSQL connections from the Halfnine desktop client on macOS and Windows. Each connection can disable agent access, allow reads, stage writes for approval or grant full access. Agent reads go to the configured AI provider. Early source-available software with unsigned installers; agent-created Docker databases start with full permissions. Public repository created October 29, 2026.
MCP unverified
Integration
| Transport | stdio |
| Auth | none |
| Endpoint | /Applications/Halfnine.app/Contents/MacOS/halfnine mcp |
| Install | Review the release and unsigned-installer implications, install Halfnine for your platform, configure a PostgreSQL connection and its agent access level, then use the Agents page or register the application executable with the mcp argument |
Use Cases
| 01 | Inspect a PostgreSQL connection with read access |
| 02 | Review staged SQL before allowing a write |
| 03 | Pause all agent database access |
Tags
postgresql desktop-client approved-writes database-tools
Machine-readable: /api/servers.json
· JSON-LD schema embedded in <head>