Audit logging

Audit middleware records mutations only. See Audit logging for the event schema and redaction policy.

Audit switch

MCP_AUDIT_ENABLED

• Type: default-on boolean; only false disables it
• Default: true
• Use: Disables the audit middleware completely when false, regardless of the selected sink.
• Example: MCP_AUDIT_ENABLED=false

Destination

MCP_AUDIT_SINK

• Type: enum
• Allowed: stderr, file, otlp, none
• Default: stderr
• Use: Chooses where mutation events go. stderr writes JSONL, file uses MCP_AUDIT_FILE, otlp is reserved for the OTLP sink, and none is an explicit opt-out.
• Example: MCP_AUDIT_SINK=file

MCP_AUDIT_FILE

• Type: path string
• Default: ./discord-mcp-audit.jsonl when the file sink is selected
• Use: File path for the JSONL audit log. The file is created when missing and appended when it exists.
• Example: MCP_AUDIT_FILE=/var/log/discord-mcp/audit.jsonl