Module query 

Query engine — read-only access to the storage database.

All CLI observability commands (mcpr proxy logs, mcpr proxy slow, etc.) are thin wrappers around QueryEngine methods. Each method executes a parameterized SQL query and maps rows to typed result structs.

The query engine opens its own read-only connection to the database. WAL mode ensures this never blocks the background writer.

Modules

clients

Query: mcpr proxy clients <proxy> — aggregated client breakdown.

logs

Query: mcpr proxy logs <proxy> — recent request log with filtering.

schema

Query: mcpr proxy schema — show captured MCP server schema and change history.

session_detail

Query: mcpr proxy session <id> — drill into a single session with its requests.

sessions

Query: mcpr proxy sessions <proxy> — list MCP sessions with client info.

slow

Query: mcpr proxy slow — slowest requests above a threshold.

stats

Query: mcpr proxy stats <proxy> — per-tool aggregated metrics.

store_ops

Query: mcpr store stats and mcpr store vacuum — operational commands.

Structs

QueryEngine

Read-only query interface to the storage database.