Environment Variables

All configuration is done through environment variables, defined in your .env.prod file. This page documents every variable.

Danger

Never commit .env.prod to version control. Use .env.example as a template.

Database

Variable	Default	Required	Description
POSTGRES_USER	breeze		PostgreSQL username
POSTGRES_PASSWORD	—	Yes	PostgreSQL password
POSTGRES_DB	breeze		Database name
POSTGRES_PORT	5432		PostgreSQL port
DATABASE_URL	—	Auto	Full connection string (constructed from above in Docker)

Redis

Variable	Default	Required	Description
REDIS_URL	redis://localhost:6379	Yes (prod)	Redis connection URL. Must carry a password in production (e.g., redis://:password@localhost:6379) — the API refuses to boot if it doesn’t.
REDIS_PORT	6379		Redis port
REDIS_PASSWORD	—	Yes (prod)	Password for Redis authentication. Set in docker-compose and include in REDIS_URL.
REDIS_PASSWORD_FILE	—		Path to a file containing the Redis password (Docker secret style). Used in place of REDIS_PASSWORD when secrets are mounted as files.

Authentication & Security

Variable	Default	Required	Description
JWT_SECRET	—	Yes	JWT signing key (min 32 chars). Generate: openssl rand -base64 64
JWT_EXPIRES_IN	15m		Access token lifetime
REFRESH_TOKEN_EXPIRES_IN	7d		Refresh token lifetime
AGENT_ENROLLMENT_SECRET	—	Yes	Shared secret for agent enrollment. Generate: openssl rand -hex 32
APP_ENCRYPTION_KEY	—	Yes	AES encryption key for sensitive data at rest
MFA_ENCRYPTION_KEY	—	Yes	Encryption key for MFA secrets
ENROLLMENT_KEY_PEPPER	—	Yes	HMAC pepper for enrollment key hashing
MFA_RECOVERY_CODE_PEPPER	—	Yes	HMAC pepper for recovery code hashing
ENROLLMENT_KEY_DEFAULT_TTL_MINUTES	60		Default enrollment key expiry
SESSION_SECRET	—	Yes	Express session signing secret
SESSION_MAX_AGE	86400000		Session max age in ms (24h)

Server

Variable	Default	Required	Description
NODE_ENV	production		Environment mode
API_PORT	3001		API server port
WEB_PORT	4321		Web dashboard port
PUBLIC_API_URL	https://${BREEZE_DOMAIN} (bundled compose only)		Public API URL used for generated agent installers and shareable links. The bundled docker-compose.yml derives this from BREEZE_DOMAIN. If you use a custom compose file, you must set PUBLIC_API_URL in .env and map it into the api service environment: block, or Generate Link / Download Installer will fail with Server URL not configured.
API_URL	—		Legacy fallback for PUBLIC_API_URL, honored only by enrollment, installer, and MCP-invite code paths. Auto-update, dev-push, and a few other routes read PUBLIC_API_URL only — prefer setting PUBLIC_API_URL.
BREEZE_DOMAIN	—	Yes (prod)	Domain for Caddy TLS provisioning
ACME_EMAIL	—	Yes (prod)	Email for Let’s Encrypt certificate notifications
CORS_ALLOWED_ORIGINS	—		Comma-separated allowed CORS origins
IS_HOSTED	—	Yes (prod)	true for hosted SaaS edition, false for self-hosted. Must be set explicitly — the API refuses to boot otherwise. Controls signup gating, billing, and email-verification policy.
TRUST_PROXY_HEADERS	—	Yes (prod)	true when behind a reverse proxy (Caddy, Cloudflare). Must be set explicitly in production.
TRUSTED_PROXY_CIDRS	—	When TRUST_PROXY_HEADERS=true	Comma-separated CIDRs of trusted reverse proxies (e.g., 10.0.0.0/8,172.16.0.0/12). Required when proxy headers are trusted.
DASHBOARD_URL	—		URL for links in emails
PUBLIC_APP_URL	—		Public-facing app URL

Email

Variable	Default	Description
EMAIL_PROVIDER	auto	Provider: auto, resend, smtp, or mailgun
RESEND_API_KEY	—	Resend API key
EMAIL_FROM	noreply@breeze.local	Sender address
SMTP_HOST	—	SMTP server hostname
SMTP_PORT	587	SMTP port
SMTP_USER	—	SMTP username
SMTP_PASS	—	SMTP password
SMTP_FROM	noreply@breeze.local	SMTP-specific sender address
SMTP_SECURE	false	Use TLS for SMTP
MAILGUN_API_KEY	—	Mailgun API key
MAILGUN_DOMAIN	—	Mailgun sending domain
MAILGUN_BASE_URL	https://api.mailgun.net	Mailgun API base URL
MAILGUN_FROM	noreply@breeze.local	Mailgun-specific sender address

SMS (Twilio)

Variable	Default	Description
TWILIO_ACCOUNT_SID	—	Twilio Account SID
TWILIO_AUTH_TOKEN	—	Twilio Auth Token
TWILIO_VERIFY_SERVICE_SID	—	Twilio Verify service SID (for SMS MFA)
TWILIO_MESSAGING_SERVICE_SID	—	Twilio Messaging Service SID (for alert SMS)
TWILIO_PHONE_NUMBER	—	Twilio phone number for outbound SMS

Binary Distribution

Variable	Default	Required	Description
BINARY_SOURCE	local		Download source: local (serve from disk, optional S3) or github (redirect to GitHub Releases)
AGENT_BINARY_DIR	./agent/bin		Local directory containing agent binaries
VIEWER_BINARY_DIR	./viewer/bin		Local directory containing viewer installers
HELPER_BINARY_DIR	/data/binaries/helper		Local directory containing helper binaries
BINARY_VERSION_FILE	—		Path to VERSION file for local mode DB registration (set automatically in Docker Compose)
BINARY_VERSION	—		Release tag for GitHub redirect mode (falls back to BREEZE_VERSION, then latest)
RELEASE_ARTIFACT_MANIFEST_PUBLIC_KEYS	—	Yes (prod)	Comma-separated base64 SPKI of the Ed25519 keys that sign release manifests. The API refuses to start in production without it. BREEZE_RELEASE_ARTIFACT_MANIFEST_PUBLIC_KEYS is accepted as an alias.

See Binary Distribution for details on local vs GitHub mode and S3 offloading.

Object Storage

Variable	Default	Description
S3_ENDPOINT	—	S3-compatible endpoint (MinIO, R2, AWS). Uses path-style addressing.
S3_ACCESS_KEY	—	Access key
S3_SECRET_KEY	—	Secret key
S3_BUCKET	—	Bucket name
S3_REGION	us-east-1	Bucket region
S3_PRESIGN_TTL	900	Presigned URL expiration in seconds (15 min)
MINIO_API_PORT	9000	MinIO API port (Docker only)
MINIO_CONSOLE_PORT	9001	MinIO web console port (Docker only)

WebRTC / TURN

The Breeze stack includes a coturn TURN server for WebRTC relay. Without TURN, remote desktop connections fail when either peer is behind symmetric NAT or a restrictive firewall.

Variable	Default	Required	Description
TURN_HOST	—	Yes (prod)	Public IP or hostname of the TURN server. Must be reachable by agents and viewers.
TURN_PORT	3478		TURN listening port (UDP and TCP)
TURN_SECRET	—	Yes (prod)	Shared secret for TURN credential generation. Generate: openssl rand -hex 32
TURN_REALM	breeze.local		TURN authentication realm

Tip

In the dev Docker Compose overlay, TURN_SECRET defaults to dev-turn-secret and TURN_HOST defaults to 127.0.0.1, so no configuration is needed for local development.

Note

If Breeze runs behind Cloudflare Tunnel or another HTTP-only proxy, TURN must run on a separate host with a public IP. Point TURN_HOST to the external TURN server’s IP. See TURN Server for setup instructions.

Monitoring

Variable	Default	Description
METRICS_SCRAPE_TOKEN	—	Bearer token for /metrics/scrape
METRICS_INCLUDE_ORG_ID	false	Include org IDs in Prometheus labels
METRICS_SCRAPE_IP_ALLOWLIST	—	Restrict metrics scraping by IP
LOG_LEVEL	info	Log verbosity: debug, info, warn, error
LOG_JSON	true	Structured JSON logging
GRAFANA_ADMIN_USER	admin	Grafana admin username
GRAFANA_ADMIN_PASSWORD	—	Grafana admin password
GRAFANA_PORT	3000	Grafana web UI port (monitoring stack)
GRAFANA_ROOT_URL	http://localhost:3000	Grafana public root URL (monitoring stack)
PROMETHEUS_PORT	9090	Prometheus web UI port (monitoring stack)
ALERTMANAGER_PORT	9093	Alertmanager web UI port (monitoring stack)
LOKI_PORT	3100	Loki log aggregation API port (monitoring stack)

Sentry

Both API and web Sentry integrations are off by default. Leave the DSN variables blank to disable. See Error Tracking & Privacy for what gets collected and how scrubbing works.

Variable	Default	Description
SENTRY_DSN	—	API Sentry DSN. Leave blank to disable server-side error tracking.
SENTRY_ENVIRONMENT	production	Sentry environment tag
SENTRY_RELEASE	—	Sentry release tag (e.g. git SHA)
SENTRY_TRACES_SAMPLE_RATE	0.1	Sentry performance trace sample rate (0.0-1.0)
PUBLIC_SENTRY_DSN_WEB	—	Web Sentry DSN. Leave blank to disable browser error tracking and on-error session replay. Inlined into the web bundle at build time.
SENTRY_AUTH_TOKEN	—	Sentry auth token used during the web build to upload source maps. If unset, source map upload is skipped and the build still succeeds.

Rate Limiting

Two rate-limit tiers protect the API. The generic per-user limit covers logged-in dashboard usage; the per-org agent limit caps how much traffic a single tenant’s fleet can generate, even with thousands of agents.

Variable	Default	Description
RATE_LIMIT_WINDOW_MS	60000	Sliding window duration (ms)
RATE_LIMIT_MAX_REQUESTS	100	Max requests per window
AGENT_ORG_RATE_LIMIT_PER_MIN	600	Per-organization sliding-window rate limit on agent-authenticated endpoints. Returns 429 with Retry-After: 60 when exceeded. Sized for ~5 active agents per org; raise for MSPs with very large fleets.

Database

Variable	Default	Description
DB_POOL_MAX	30	Maximum postgres-js connection pool size. Tune up if you see cascading 504s during heartbeat storms; confirm Postgres max_connections has headroom (default 100 is fine for a single API replica).

File Transfer & Remote Sessions

Variable	Default	Description
TRANSFER_STORAGE_PATH	./data/transfers	File transfer storage directory
MAX_TRANSFER_SIZE_MB	100	Max file transfer size
MAX_ACTIVE_TRANSFERS_PER_ORG	20	Concurrent transfer limit per org
MAX_ACTIVE_TRANSFERS_PER_USER	10	Concurrent transfer limit per user
MAX_ACTIVE_REMOTE_SESSIONS_PER_ORG	10	Concurrent remote sessions per org
MAX_ACTIVE_REMOTE_SESSIONS_PER_USER	5	Concurrent remote sessions per user
PATCH_REPORT_STORAGE_PATH	./data/patch-reports	Patch compliance report storage

Feature Flags

Variable	Default	Description
ENABLE_REGISTRATION	true	Allow new user registration
ENABLE_2FA	true	Enable two-factor authentication
ENABLE_API_DOCS	false	Enable Swagger API documentation
ENABLE_API_DOCS_UI	false	Enable interactive Swagger UI (requires ENABLE_API_DOCS=true)
USE_AGENT_SDK	—	Use Claude Agent SDK for AI chat
PORTAL_STATE_BACKEND	memory	Portal state backend: memory or redis (auto redis in production)

MCP Server

Variable	Default	Description
MCP_SSE_RATE_LIMIT_PER_MINUTE	30	SSE connection rate limit per API key
MCP_MESSAGE_RATE_LIMIT_PER_MINUTE	120	Message rate limit per API key
MCP_MAX_SSE_SESSIONS_PER_KEY	5	Max concurrent SSE sessions per API key
MCP_REQUIRE_EXECUTE_ADMIN	false	Require ai:execute_admin scope for Tier 3 tools
MCP_EXECUTE_TOOL_ALLOWLIST	—	Comma-separated allowed Tier 3 tools (empty = deny all)

Cloudflare mTLS

Variable	Default	Description
CLOUDFLARE_API_TOKEN	—	Cloudflare API token with Client Certificates permission
CLOUDFLARE_ZONE_ID	—	Cloudflare zone ID for your domain

Note

mTLS is fully optional. When these variables are unset, Breeze operates normally without mutual TLS.

Cloud-to-Cloud Backup (M365)

Variable	Default	Description
C2C_M365_CLIENT_ID	—	Azure AD app (client) ID for multi-tenant M365 backup. When set with the secret below, enables one-click admin consent flow for connecting Microsoft 365 backups.
C2C_M365_CLIENT_SECRET	—	Azure AD app client secret for multi-tenant M365 backup

Note

These variables are optional. When unset, the C2C connection wizard falls back to manual credential entry (Client ID, Secret, Tenant ID). Setting both enables a streamlined “Grant Access” button that redirects to Microsoft’s admin consent flow.

Docker Deployment

Variable	Default	Description
BREEZE_VERSION	latest	Breeze release tag for Docker images (e.g. 0.50.0). Also used by GitHub redirect mode for agent binary downloads.
DOCKER_PLATFORM	linux/amd64	Container platform. GHCR images are amd64 only. On Apple Silicon, use docker-compose.override.yml.local-build to build native arm64 images instead.
REDIS_MAXMEMORY	256mb	Maximum memory Redis is allowed to use. Redis runs with noeviction policy so BullMQ jobs are never silently dropped.

MSI Installer Signing

Variable	Default	Description
MSI_SIGNING_URL	—	URL of the remote Windows signing service. When set, pre-configured MSI installer downloads are code-signed before delivery.
MSI_SIGNING_CF_ACCESS_ID	—	Cloudflare Access service token Client ID for authenticating to the signing service
MSI_SIGNING_CF_ACCESS_SECRET	—	Cloudflare Access service token Client Secret for authenticating to the signing service

Note

MSI signing is fully optional. When these variables are unset, installer downloads are delivered unsigned. See Code Signing for details.

Billing

Variable	Default	Description
BILLING_SERVICE_URL	—	URL of the billing service for AI credit checks and deductions. When unset, AI usage is unlimited.
BILLING_SERVICE_API_KEY	—	API key for authenticating to the billing service

Note

Billing integration is optional. When these variables are unset, AI chat sessions proceed without credit checks.

AI

Variable	Default	Description
ANTHROPIC_API_KEY	—	Anthropic API key for AI assistant (BYOK)