Logging

The server uses Winston for structured logging. Logs are written to stderr (so they don't interfere with the MCP protocol on stdout) and, optionally, to files.

Log levels

Set the level via environment variable:

EBAY_LOG_LEVEL=debug  # error | warn | info | http | verbose | debug | silly

File logging

Enable persistent logs to disk:

EBAY_ENABLE_FILE_LOGGING=true

Log files are written to ~/.ebay-mcp/logs/:

File	Contents
error.log	Error-level messages only
combined.log	All log messages
debug.log	Debug and verbose messages

Example output

[2024-01-15 10:30:45] [INFO] [Server] Starting eBay API MCP Server
[2024-01-15 10:30:45] [INFO] [Auth] Loading tokens from environment variables
[2024-01-15 10:30:46] [INFO] [Auth] Access token refreshed successfully
[2024-01-15 10:30:46] [HTTP] [API] Request: GET https://api.ebay.com/sell/inventory/v1/inventory_item
[2024-01-15 10:30:47] [HTTP] [API] Response: 200 OK