Configuration Reference

How configuration is resolved

Environment variables are the primary configuration surface for self-hosted TokenTimer. Defaults come from code fallbacks, then from Compose or Helm example values where applicable.

Some settings can also be stored in the database through the System Settings admin UI. When both exist, the precedence differs per setting:

Setting	Precedence (highest wins)
SMTP config	System Settings DB > env vars > code defaults
Twilio credentials and template SIDs	System Settings DB > env vars > code defaults
Alert thresholds, delivery window	Workspace preferences DB > env vars > code defaults
CERTOPS_ENABLED	Env var > System Settings DB > default (false)
Admin bootstrap	Env vars only

In the tables below, unset means optional and disabled unless you set it. required means you must provide a value for production.

Core runtime and bootstrap

Variable	Description	Default value	Scope
TT_MODE	Core variant mode	oss	App mode
NODE_ENV	Runtime environment	development	API, worker, dashboard
SESSION_SECRET	Session signing secret	required	API, worker
ADMIN_EMAIL	First admin bootstrap email	admin@your-company.com	API bootstrap
ADMIN_PASSWORD	First admin bootstrap password	ChangeThisSecurePassword123!	API bootstrap
ADMIN_NAME	First admin bootstrap display name	Administrator	API bootstrap
DISABLE_ADMIN_BOOTSTRAP	Skip first admin auto-create when true	false	API bootstrap
PORT	API listen port	4000	API
HOST	API bind host	0.0.0.0	API
API_PORT	Compose API port mapping	4000	Local compose
DASHBOARD_PORT	Compose dashboard port mapping	5173	Local compose

See Authentication for the full admin bootstrap flow.

Canonical URLs and API docs

Variable	Description	Default value	Scope
APP_URL	Frontend public URL (canonical)	http://localhost:5173	API, worker, dashboard
API_URL	Backend public URL (canonical)	http://localhost:4000	API, worker, dashboard
ENABLE_API_DOCS	Enable Swagger UI (/api-docs) in production	false	API docs serving
VITE_API_URL	Frontend build-time API override	http://localhost:4000	Dashboard build
OPENAPI_SPEC_PATH	Optional absolute path to OpenAPI YAML	unset (auto-discovery)	API docs serving
PUBLIC_BASE_URL	Public URL used for webhook signature validation	unset (falls back to API_URL)	API webhook auth

Helm vs Compose vs runtime

Layer	APP_URL	API_URL when unset in your config
Helm (config.baseUrl / apiUrl)	baseUrl	apiUrl if set, else baseUrl (same host)
Helm stock values.yaml	http://localhost:8080	http://localhost:4000 (both set explicitly)
Docker Compose (.env)	${APP_URL:-http://localhost:5173}	${API_URL:-http://localhost:4000} (no cross-fallback in compose files)
API process (env missing)	http://localhost:5173	API_URL, else APP_URL, else http://localhost:4000

warning

In local http://localhost with NODE_ENV=production, the browser does not persist or send the secure session cookie for the auth flow. Use HTTPS in front of the API and dashboard (reverse proxy with TLS), otherwise secure cookies are expected to fail in local HTTP.

Split-host deployments (dashboard and API on different origins)

When APP_URL and API_URL differ on HTTPS (for example dashboard at https://app.example.com and API at https://api.example.com), the API:

• Allows both origins in CORS (configured APP_URL and API_URL only in production; localhost dev origins are omitted unless ALLOW_LOCAL_DEV_CORS=true).
• Sets session and CSRF cookies to SameSite=None; Secure on the API host. Host-only cookies (no SESSION_COOKIE_DOMAIN) are enough for credentialed withCredentials calls from the dashboard to api.example.com. Set SESSION_COOKIE_DOMAIN only when you intentionally need a parent-domain cookie shared across multiple subdomains (broader scope; weaker isolation).

HTTP split-host (including LAN IPs or internal DNS without TLS) does not use SameSite=None; cookies stay Lax because None requires Secure and is often blocked. Use HTTPS for split-host production, or put UI and API behind one origin (ingress).

Docker Compose (http://localhost:5173 + http://localhost:4000) and Helm port-forward (http://localhost:8080 + http://localhost:4000) keep SameSite=Lax (same-site across ports on local HTTP). For plain HTTP + NODE_ENV=production, set SESSION_COOKIE_SECURE_LOCALHOST_OVERRIDE=true only when both APP_URL and API_URL are local HTTP (localhost / 127.0.0.1); the flag is ignored on internet-facing HTTPS URLs.

Same-host installs (single ingress hostname for UI and API) can leave SESSION_COOKIE_DOMAIN unset. Helm defaults often use baseUrl: http://localhost:8080 and apiUrl: http://localhost:4000; Compose maps the dashboard to host port 5173 by default (APP_URL=http://localhost:5173). Always set APP_URL and API_URL to the origins users and integrations actually use in the browser.

Database and pooling

Variable	Description	Default value	Scope
DB_HOST	PostgreSQL host	localhost (code), postgres (compose)	API, worker
DB_PORT	PostgreSQL port	5432	API, worker
DB_NAME	PostgreSQL database name	tokentimer	API, worker
DB_USER	PostgreSQL user	tokentimer	API, worker
DB_PASSWORD	PostgreSQL password	password (dev fallback), required (prod)	API, worker
DATABASE_URL	Full PostgreSQL connection URL override	unset	API, worker
DB_SSL	DB SSL mode (require or verify)	unset (disabled)	API, worker
PGSSLROOTCERT	Path to CA cert for DB SSL verify mode	unset	API, worker
DB_POOL_MAX	Max DB pool connections	10	API, worker
DB_POOL_MIN	Min DB pool connections	2	API, worker
DB_POOL_IDLE_TIMEOUT	Idle connection timeout (ms)	30000	API, worker
DB_CONNECTION_TIMEOUT	DB connection timeout (ms)	5000	API, worker

note

PostgreSQL is the only stateful component. See Backup and restore for backup guidance.

Authentication and security

Variable	Description	Default value	Scope
LOCAL_AUTH_ENABLED	Enable local email/password auth	true	API auth
REQUIRE_EMAIL_VERIFICATION	Require verified email before access	true	API auth
TWO_FACTOR_ENABLED	Enable 2FA features	true	API auth
SESSION_MAX_AGE	Session max age in ms	86400000	API auth
SESSION_COOKIE_SECURE_LOCALHOST_OVERRIDE	Allow insecure session cookies in production only when APP_URL and API_URL are both local HTTP (localhost / 127.0.0.1); ignored otherwise	false	API auth
SESSION_COOKIE_DOMAIN	Optional parent domain for session/CSRF cookies (e.g. .example.com) when you need cookies shared across subdomains; not required for typical split-host API calls	unset	API auth
ALLOW_LOCAL_DEV_CORS	In production, also allow http://localhost:* and http://127.0.0.1:* in CORS (local troubleshooting only)	false	API security
CSRF_ENABLED	Enable CSRF protection	true	API security
MIN_PASSWORD_LENGTH	Minimum password length	8	API auth
REQUIRE_UPPERCASE	Enforce uppercase in passwords	true	API auth
REQUIRE_NUMBERS	Enforce numeric chars in passwords	true	API auth
PHONE_HASH_SALT	Optional salt for phone hashing	unset	API privacy
TRUST_PROXY_HOPS	Number of trusted reverse-proxy hops in front of the API (affects req.ip and req.protocol resolution). 0 = no proxy, 1 = single ingress/reverse proxy, 2 = LB -> ingress.	2	API security
WORKER_API_KEY	Worker-to-API auth key	unset (falls back to SESSION_SECRET)	Worker, API

Email and delivery (SMTP)

Variable	Description	Default value	Scope
SMTP_HOST	SMTP host(s) (comma-separated)	localhost in config helper, unset in compose examples	API, worker email
SMTP_PORT	SMTP port(s) (comma-separated)	587 in config helper	API, worker email
SMTP_USER	SMTP username(s) (comma-separated)	unset	API, worker email
SMTP_PASS	SMTP password(s) (comma-separated)	unset	API, worker email
FROM_EMAIL	Sender email override	unset	API, worker email
FROM_EMAIL_NAME	Sender display name	TokenTimer	API, worker email
SMTP_SECURE	Force SMTPS/SSL	false	API, worker email
SMTP_REQUIRE_TLS	Require STARTTLS upgrade	true	API, worker email
SMTP_REJECT_UNAUTHORIZED	Reject invalid TLS certs	unset	API, worker email

note

SMTP can be configured via env vars or from the System Settings admin UI. Env vars serve as bootstrap values; once an admin configures SMTP in the UI, the database values take precedence.

Alerts, limits, and webhooks

Variable	Description	Default value	Scope
ALERT_THRESHOLDS	Default days-before-expiry thresholds (overridden by workspace preferences)	30,14,7,1,0	Alerts
ALERT_MAX_ATTEMPTS	Max delivery retries per alert	20	Alerts
ALERT_RETRY_DELAY_MS	Retry delay in ms	300000	Alerts
ALERT_TEST_UTC_DAY	Test-only scheduler day override	unset	Alerts testing
GLOBAL_RATE_LIMIT_WINDOW_MS	Global limiter window in ms	60000	API rate limiting
GLOBAL_RATE_LIMIT_MAX	Global limiter max requests per window	300 (prod) / 1000 (dev,test)	API rate limiting
GLOBAL_SLOWDOWN_WINDOW_MS	Global slowdown window in ms	900000	API rate limiting
GLOBAL_SLOWDOWN_DELAY_AFTER	Requests before delay is applied	50	API rate limiting
GLOBAL_SLOWDOWN_DELAY_MS	Added delay per request after threshold	500	API rate limiting
LOGIN_RATE_LIMIT_WINDOW_MS	Login limiter window in ms	900000	Auth rate limiting
LOGIN_RATE_LIMIT_MAX	Login attempts per window	10 (prod) / 500 (dev,test)	Auth rate limiting
LOGIN_EMAIL_RATE_LIMIT_MAX	Login attempts per email per window	5 (prod) / 500 (dev,test)	Auth rate limiting
PASSWORD_RESET_RATE_LIMIT_WINDOW_MS	Password reset limiter window in ms	900000	Auth rate limiting
PASSWORD_RESET_RATE_LIMIT_MAX	Password reset attempts per window	5 (prod) / 100 (dev,test)	Auth rate limiting
PASSWORD_RESET_EMAIL_RATE_LIMIT_MAX	Password reset attempts per email per window	3 (prod) / 200 (dev,test)	Auth rate limiting
EMAIL_VERIFICATION_RATE_LIMIT_WINDOW_MS	Email verification limiter window in ms	3600000	Auth rate limiting
EMAIL_VERIFICATION_RATE_LIMIT_MAX	Email verification attempts per window	20 (prod) / 500 (dev,test)	Auth rate limiting
AUTH_SLOWDOWN_WINDOW_MS	Auth slowdown window in ms	900000	Auth rate limiting
AUTH_SLOWDOWN_DELAY_AFTER	Auth requests before slowdown	5 (prod) / 1000 (dev,test)	Auth rate limiting
AUTH_SLOWDOWN_DELAY_MS	Auth slowdown delay per request in ms	500	Auth rate limiting
AUTH_SLOWDOWN_MAX_DELAY_MS	Auth slowdown max delay in ms	10000	Auth rate limiting
API_RATE_LIMIT_WINDOW_MS	Plan-aware API limiter window in ms	900000	API rate limiting
TEST_API_RATE_LIMIT_WINDOW_MS	Test/dev API limiter window in ms	900000	API rate limiting
TEST_API_RATE_LIMIT_MAX	Test/dev API limiter max requests	1000 (prod) / 10000 (dev,test)	API rate limiting
DELIVERY_WINDOW_DEFAULT_START	Default delivery window start (UTC, overridden by workspace preferences)	00:00	Alerts
DELIVERY_WINDOW_DEFAULT_END	Default delivery window end (UTC, overridden by workspace preferences)	23:59	Alerts
DELIVERY_WINDOW_DEFAULT_TZ	Default delivery timezone (overridden by workspace preferences)	UTC	Alerts
DELIVERY_WINDOW_DEFERRAL_MS	Defer delay when outside window	unset	Alerts
MAX_WEBHOOKS	Max webhooks per workspace	unset	Alerts/webhooks
TEST_WEBHOOK_RATE_LIMIT_1M_WINDOW_MS	Test webhook short limiter window in ms	60000	Alerts/webhooks
TEST_WEBHOOK_RATE_LIMIT_1M_MAX	Test webhook max requests in short window	5	Alerts/webhooks
TEST_WEBHOOK_RATE_LIMIT_5M_WINDOW_MS	Test webhook long limiter window in ms	300000	Alerts/webhooks
TEST_WEBHOOK_RATE_LIMIT_5M_MAX	Test webhook max requests in long window	10	Alerts/webhooks
TEST_WEBHOOK_COOLDOWN_MS	Per-user test webhook cooldown after each attempt	5000	Alerts/webhooks
WEBHOOK_ALLOW_ALL_HOSTS	Allow all webhook destinations when true	false	Webhook security
WEBHOOK_PROVIDER_HOSTS	Extra allowed provider hosts	empty (built-in list still allowed)	Webhook security
WEBHOOK_EXTRA_PROVIDER_HOSTS	Additional allowed hosts	empty	Webhook security
VAULT_ADDRESS_ALLOWLIST	Vault integration host allowlist	empty (no host restriction)	Integration security
AZURE_VAULT_ADDRESS_ALLOWLIST	Azure Key Vault host allowlist	empty (no host restriction)	Integration security
GITHUB_ADDRESS_ALLOWLIST	GitHub host allowlist	empty (no host restriction)	Integration security
GITLAB_ADDRESS_ALLOWLIST	GitLab host allowlist	empty (no host restriction)	Integration security
INTEGRATION_SCAN_LIMITS	JSON plan-to-limit map (core defaults unlimited)	{"oss":Infinity}	Integration quotas
DOMAIN_CHECKER_DISCOVERY_LIMITS	Domain checker discovery result cap map (plan:value)	oss:10000000	Domain checker
DOMAIN_CHECKER_IMPORT_LIMITS	Domain checker import request cap map (plan:value)	oss:50000	Domain checker
DOMAIN_CHECKER_MAX_RESULTS	Direct override for discovery results, capped internally at 25,000,000	unset	Domain checker
DOMAIN_CHECKER_IMPORT_MAX_CERTIFICATES	Direct override for import certificates per request, capped at 200,000	unset	Domain checker
CONTACT_GROUP_LIMITS	JSON plan-to-limit map (core defaults unlimited)	{"oss":Infinity}	Contact groups
CONTACT_GROUP_MEMBER_LIMITS	JSON plan-to-limit map (core defaults unlimited)	{"oss":Infinity}	Contact groups
WORKSPACE_PLAN_LIMITS	JSON plan-to-limit map (core defaults unlimited)	{"oss":Infinity}	Workspaces
MEMBER_PLAN_LIMITS	JSON plan-to-limit map (core defaults unlimited)	{"oss":Infinity}	Workspace members

CertOps (certificate operations)

Enabling and required keys

Variable	Description	Default value	Scope
CERTOPS_ENABLED	Enable the certificate operations layer. When enabled, TokenTimer maintains a managed-certificate inventory linked to cert-category tokens, accepts public certificate (PEM) import, and bridges observations from HTTPS endpoint/domain monitors into the inventory (when the monitor has a linked token). When disabled, CertOps API endpoints return 404.	false	CertOps
CERTOPS_SIGNING_ENCRYPTION_KEY	64 hex characters (32 bytes). Wraps the control-plane Ed25519 job-signing private key at rest. Required before any agent can be dispatched signed work: operations that need the key fail closed with CERTOPS_SIGNING_ENCRYPTION_KEY_MISSING when it is unset or malformed.	none	Agents
CERTOPS_REGISTRATION_ENCRYPTION_KEY	64 hex characters (32 bytes). Wraps agent registration credentials at rest. Required for agent registration to succeed.	none	Agents

Treat these two keys like SESSION_SECRET

Generate each with openssl rand -hex 32, set them before enabling agents, and back them up. Losing CERTOPS_SIGNING_ENCRYPTION_KEY makes the stored signing key unreadable, and you must rotate to a new signing key and have every agent re-pin it. Rotating either value without a controlled migration has the same effect. Both are read from the environment only; they are never stored in the database.

If you only use CertOps for inventory and monitoring (no agents), CERTOPS_ENABLED alone is enough. The two encryption keys are needed for the agent execution plane.

Renewal scheduling

Variable	Description	Default value	Scope
CERTOPS_RENEWAL_THRESHOLD_DAYS	Schedule a renewal when a managed certificate expires within this many days.	30	Renewals
CERTOPS_RENEWAL_PER_CA_CAP	Maximum in-flight renewals per CA endpoint per workspace, so one CA cannot be flooded. Exceeding it defers work rather than failing it (CERTOPS_RENEWAL_PER_CA_CAP_EXCEEDED).	5	Renewals
CERTOPS_JOB_LEASE_SECONDS	How long an agent's claim on a job stays valid before it must be renewed. Raise this if legitimate renewals routinely take longer.	900	Jobs
CERTOPS_LEASE_HARD_GRACE_MS	Extra time a still-heartbeating agent gets before its expired-lease job is judged.	3600000	Jobs

Lease expiry never silently retries work that may already have changed a host. See Reconciling interrupted jobs.

Agent fleet and compatibility

Variable	Description	Default value	Scope
CERTOPS_AGENT_OFFLINE_AFTER_MS	Heartbeat silence after which an agent counts as offline. Observational: it never retires an agent by itself.	600000	Agents
CERTOPS_AGENT_CLOCK_DRIFT_WARN_MS	Reported agent clock offset above which the fleet view warns.	5000	Agents
CERTOPS_AGENT_CLOCK_DRIFT_ALERT_MS	Reported agent clock offset above which the fleet view alerts. Signed jobs enforce a validity window, so a badly skewed host cannot execute work.	30000	Agents
CERTOPS_AGENT_MIN_PROTOCOL_VERSION	Oldest accepted agent protocol version.	1.0.0	Agents
CERTOPS_AGENT_MAX_PROTOCOL_VERSION	Newest accepted agent protocol version.	1.999.999	Agents
CERTOPS_AGENT_MIN_AGENT_VERSION	Oldest accepted agent build. Raise this to force a fleet upgrade.	0.1.0	Agents
CERTOPS_AGENT_MAX_AGENT_VERSION	Newest accepted agent build.	99.999.999	Agents
CERTOPS_REGISTRATION_REPLAY_TTL_MS	How long a registration attempt is remembered for replay rejection.	900000	Agents

Narrowing the version windows blocks incompatible agents at registration and heartbeat with CERTOPS_AGENT_COMPATIBILITY_BLOCKED, which is the supported way to stop an old build from claiming work during a staged upgrade.

Maintenance sweeps

The CertOps maintenance worker runs five sweeps. Each has an enable flag (default true) and a timeout in milliseconds:

Sweep	Enable variable	Timeout variable	What it does
Lease reaper	CERTOPS_SWEEP_LEASE_REAPER_ENABLED	CERTOPS_SWEEP_LEASE_REAPER_TIMEOUT_MS	Requeues or flags jobs whose lease expired
Stale agents	CERTOPS_SWEEP_STALE_AGENTS_ENABLED	CERTOPS_SWEEP_STALE_AGENTS_TIMEOUT_MS	Marks agents offline after heartbeat silence
Nonce sweep	CERTOPS_SWEEP_NONCE_ENABLED	CERTOPS_SWEEP_NONCE_TIMEOUT_MS	Deletes consumed/expired dispatch nonces past their grace window
Registration replay	CERTOPS_SWEEP_REGISTRATION_REPLAY_ENABLED	CERTOPS_SWEEP_REGISTRATION_REPLAY_TIMEOUT_MS	Expires registration replay records
Renewal scheduler	CERTOPS_SWEEP_RENEWAL_SCHEDULER_ENABLED	CERTOPS_SWEEP_RENEWAL_SCHEDULER_TIMEOUT_MS	Creates renewal jobs for certificates near expiry

Disabling the renewal-scheduler sweep stops new automatic renewal jobs from being created while leaving existing jobs, dispatch, and reporting untouched. Disabling the lease reaper leaves interrupted jobs in place indefinitely, so keep it on outside of debugging.

cert-manager controller

These apply to the Kubernetes controller, not the API or worker:

Variable	Description	Default value	Scope
CERTOPS_CONTROLLER_MODE	observe (report only) or provision (create authorized Certificate resources).	observe	Controller
CERTOPS_WATCH_NAMESPACES	Comma-separated namespaces to watch.	all watched namespaces	Controller
CERTOPS_CLUSTER_WIDE	Watch cluster-wide instead of a namespace list.	false	Controller
CERTOPS_RECONCILE_INTERVAL	Reconcile loop interval.	see chart defaults	Controller
CERTOPS_HEALTH_PORT	Port for the controller's health endpoint.	see chart defaults	Controller
CERTOPS_SHUTDOWN_TIMEOUT	Graceful shutdown budget.	see chart defaults	Controller

The controller is disabled by default in the Helm chart and defaults to observe mode. See CertOps with ACME and cert-manager.

Operator commands

Some CertOps operations are deployment-level rather than per-workspace, and are exposed as commands rather than API routes:

# Inspect / rotate the control-plane job-signing key
pnpm certops:rotate-signing-key status
pnpm certops:rotate-signing-key begin
pnpm certops:rotate-signing-key complete

See Rotating the job-signing key.

TokenTimer stores only public certificate material (fingerprints, serials, issuers, subjects, SANs, validity, chains) and external key references. Requests containing private key material are rejected with HTTP 422.

For the flag resolution order and rollout guidance, see Enable CertOps.

Worker scheduling

TokenTimer runs five background workers:

• Alert discovery scans tokens and queues expiry alerts.
• Alert delivery processes the alert queue and sends notifications (email, webhooks, WhatsApp).
• Auto-sync runs scheduled integration scans (for example Vault or GitHub imports).
• Endpoint check monitors HTTPS endpoints and their SSL certificates.
• Weekly digest sends the weekly token-expiry summary.

How they are scheduled depends on the deployment method:

• Docker Compose: each worker runs as its own long-running container (worker-discovery, worker-delivery, worker-auto-sync, worker-endpoint-check, worker-weekly-digest) using the built-in runner. The runner schedules jobs in-process from a cron expression; the container restart: unless-stopped policy is crash recovery only, not the scheduler.
• Helm (Kubernetes): each worker is a Kubernetes CronJob that starts a one-shot process per scheduled run. Schedules come from worker.cronjobs.<name>.schedule in values.yaml, not from the WORKER_*_CRON variables below. The chart defaults match the runner defaults.

A cron expression is a five-field schedule string (minute hour day-of-month month day-of-week), for example */5 * * * * for every 5 minutes.

Variable	Description	Default value	Scope
WORKER_DISCOVERY_CRON	Alert discovery schedule (scan tokens, queue expiry alerts)	*/5 * * * *	Worker (Compose)
WORKER_DELIVERY_CRON	Alert delivery schedule (send queued notifications), offset 1 min after discovery	1/5 * * * *	Worker (Compose)
WORKER_AUTO_SYNC_CRON	Auto-sync schedule (scheduled integration scans)	*/1 * * * *	Worker (Compose)
WORKER_ENDPOINT_CHECK_CRON	Endpoint/SSL check schedule	*/1 * * * *	Worker (Compose)
WORKER_WEEKLY_DIGEST_CRON	Weekly digest schedule (Monday 09:00)	0 9 * * 1	Worker (Compose)

Cron expressions are evaluated in the container timezone. Compose worker services set TZ: ${TZ:-UTC}, so set TZ in deploy/compose/.env (for example TZ=Europe/Zurich) to shift schedules to local time.

Run on start

In cron mode, workers wait for their next scheduled run and do not run immediately at process start. Set a run-on-start variable to true to also run the job once at startup.

Variable	Description	Default value	Scope
WORKER_RUN_ON_START	Global run-on-start for discovery, delivery, auto-sync, and endpoint check. Not inherited by weekly digest.	false	Worker
WORKER_DISCOVERY_RUN_ON_START	Per-worker override for alert discovery	false	Worker
WORKER_DELIVERY_RUN_ON_START	Per-worker override for alert delivery	false	Worker
WORKER_AUTO_SYNC_RUN_ON_START	Per-worker override for auto-sync	false (code), true (compose)	Worker
WORKER_ENDPOINT_CHECK_RUN_ON_START	Per-worker override for endpoint check	false	Worker
WORKER_WEEKLY_DIGEST_RUN_ON_START	Run the weekly digest immediately at startup. Required for weekly digest; it ignores the global variable.	false	Worker

The Compose worker-auto-sync service sets WORKER_AUTO_SYNC_RUN_ON_START=true by default, so an integration scan runs when that container starts.

In interval mode, discovery, delivery, auto-sync, and endpoint check run once at startup by default (the weekly digest still does not).

Supported cron syntax

The runner accepts standard five-field cron expressions with:

• * for any value
• step values: */n and n/m (start at n, repeat every m)
• exact integers, ranges (n-m), and comma-separated lists
• day-of-week 0-7, where both 0 and 7 mean Sunday

Not supported: named months or weekdays (JAN, MON), and the L, W, and # modifiers. Invalid expressions fail at worker startup with an error naming the variable.

Interval mode

Cron mode is the default. To use fixed millisecond intervals instead, set the worker's cron variable to interval (or 0, false, off) and set the matching interval variable:

WORKER_DISCOVERY_CRON=interval
WORKER_DISCOVERY_INTERVAL_MS=60000

WORKER_*_INTERVAL_MS variables are ignored while the worker is in cron mode.

Variable	Description	Default value	Scope
WORKER_DISCOVERY_INTERVAL_MS	Discovery interval (ms)	60000	Worker
WORKER_DELIVERY_INTERVAL_MS	Delivery interval (ms)	30000	Worker
WORKER_AUTO_SYNC_INTERVAL_MS	Auto-sync interval (ms)	300000	Worker
WORKER_ENDPOINT_CHECK_INTERVAL_MS	Endpoint check interval (ms)	60000	Worker
WORKER_WEEKLY_DIGEST_INTERVAL_MS	Weekly digest interval (ms)	86400000	Worker

Failure behavior

Variable	Description	Default value	Scope
WORKER_EXIT_ON_ERROR	When false, job failures are logged (worker-runner-job-failure) and the runner keeps running. When true, the process exits on the first unhandled job error and the container restart policy recovers it.	false	Worker

For worker health metrics (runner_up, delivery and digest gauges), see Monitoring and metrics.

Metrics and observability

Variable	Description	Default value	Scope
ENABLE_METRICS	Enable /metrics and metric push attempts when true	false	API, worker
PUSHGATEWAY_URL	Prometheus Pushgateway endpoint	unset	Worker metrics
ENVIRONMENT_SUFFIX	Metrics environment label (if you have multiple instances)	unset	Worker metrics

WhatsApp (Twilio)

Variable	Description	Default value	Scope
TWILIO_ACCOUNT_SID	Twilio account SID	unset	WhatsApp
TWILIO_AUTH_TOKEN	Twilio auth token	unset	WhatsApp
TWILIO_WHATSAPP_FROM	WhatsApp sender (E.164)	unset	WhatsApp
TWILIO_WHATSAPP_ALERT_CONTENT_SID_EXPIRES	Content template SID for expiring alerts	unset	WhatsApp
TWILIO_WHATSAPP_ALERT_CONTENT_SID_EXPIRED	Content template SID for expired alerts	unset	WhatsApp
TWILIO_WHATSAPP_ALERT_CONTENT_SID_ENDPOINT_DOWN	Content template SID for endpoint down alerts	unset	WhatsApp
TWILIO_WHATSAPP_ALERT_CONTENT_SID_ENDPOINT_RECOVERED	Content template SID for endpoint recovered alerts	unset	WhatsApp
TWILIO_WHATSAPP_WEEKLY_DIGEST_CONTENT_SID	Content template SID for weekly digest	unset	WhatsApp
TWILIO_WHATSAPP_TEST_CONTENT_SID	Content template SID for test messages	unset	WhatsApp
WHATSAPP_RATE_PER_MIN	Outbound WhatsApp message rate cap	unset	WhatsApp throttling
WHATSAPP_DRY_RUN	Log messages without sending when true	false	WhatsApp testing

Admin setup: Twilio WhatsApp

Use this flow when you want to enable WhatsApp notifications, expiry templates, weekly digest, and endpoint alert templates.

1. Configure Twilio credentials in System Settings. As an admin, open System Settings > WhatsApp (Twilio) and fill in the Account SID, Auth Token, and WhatsApp From Number. Optional template SIDs configurable in the UI: Alert (Expires), Alert (Expired), Test Message, and Weekly Digest.

2. Configure endpoint alert template SIDs at deployment level. Endpoint down and endpoint recovered WhatsApp alerts use dedicated deployment variables:

• TWILIO_WHATSAPP_ALERT_CONTENT_SID_ENDPOINT_DOWN
• TWILIO_WHATSAPP_ALERT_CONTENT_SID_ENDPOINT_RECOVERED

Set them in your deployment method: deploy/compose/.env for Compose, deploy/helm/values.yaml for Helm, or your own secret/config injection. After changing these values, restart the delivery worker so it picks up the new template SIDs.

3. Create Twilio content templates. Create two approved Twilio WhatsApp templates for endpoint down and endpoint recovered. The exact template bodies, placeholder contracts, and copy-ready examples for all TokenTimer templates are documented in Contact groups & channels → WhatsApp templates setup.

Variables sent by TokenTimer for endpoint WhatsApp alerts: recipient_name, endpoint_name, endpoint_url, token_name, detected_at.

4. Verify.

• Use Send test WhatsApp in System Settings to verify base Twilio credentials and sender configuration.
• Trigger an endpoint outage and confirm the delivery log shows channel whatsapp.
• Confirm the delivery metadata records template_kind = endpoint_down for outage alerts and template_kind = endpoint_recovered for recovery alerts.

Legacy and compatibility

Variable	Description	Default value	Scope
PLAN_API_LIMITS	API limiter plan map override (parsed as plan:value, fallback oss:6000)	unset	API middleware
RATE_LIMIT_WINDOW	Config package generic rate-limit window (ms)	60000	Shared config consumers
RATE_LIMIT_MAX	Config package generic rate-limit max requests	100	Shared config consumers