langobs-server 0.2.0

LangObs observability server for AI agents

langobs-server

FastAPI backend for LangObs — real-time observability for AI agents.

Install

pip install langobs-server

Run

langobs-server
# REST API: http://localhost:8766/api/v1
# WebSocket: ws://localhost:8766/ws
# Dashboard: http://localhost:5173 (start separately)

Run from source

git clone https://github.com/langobs/langobs
cd langobs
make install && make dev

API Endpoints

Method	Path	Description
GET	/api/v1/sessions	List all sessions
GET	/api/v1/traces/{session_id}	Get all trace events for a session
POST	/api/v1/traces/{session_id}	Ingest trace events
GET	/api/v1/costs/{session_id}	Cost breakdown
GET	/api/v1/hallucinations/{session_id}	Hallucination alerts
POST	/api/v1/hallucinations/{session_id}/detect	Run detection
GET	/api/v1/memory/{session_id}	Memory entries
PATCH	/api/v1/memory/entry/{id}	Edit memory entry
DELETE	/api/v1/memory/entry/{id}	Delete memory entry
GET	/api/v1/replay/{session_id}	Replay event stream
GET	/health	Health check

WebSocket Protocol

Connect to ws://localhost:8766/ws and send a hello message:

{ "type": "hello", "role": "sdk" }

Roles: "sdk" (agent sending events) or "dashboard" (browser receiving events).

Configuration

Environment variables (all optional):

Variable	Default	Description
DATABASE_URL	sqlite+aiosqlite:///langobs.db	Database URL
HOST	0.0.0.0	Bind address
PORT	8766	Port
CORS_ORIGINS	["*"]	Allowed CORS origins

License

MIT