Server options reference (anycable-go)

Every command-line option and environment variable for the anycable-go server, grouped by area. Generated from anycable-go --help (OSS v1.6.14), with Pro-only options listed separately.

For prose explanations of the most common options, see Configuration. This page is the complete, flat list, handy as a lookup and for agents.

Every option can be set three ways: a command-line flag (--port 8080), an environment variable (the Env column, e.g. ANYCABLE_PORT=8080), or a key in a TOML config file (--config-path). Options marked Value take an argument. Run anycable-go --help for the list matching your installed version.

Global

Option	Value	Env	Default	Description
--config-path	yes	—	—	Path to the TOML configuration file
--help, -h	—	—	—	show help
--ignore-config-path	—	—	false	Ignore configuration files
--print-config	—	—	false	Print configuration and exit
--version, -v	—	—	—	print the version
--ws_max_pending_size	yes	—	1048576	Maximum size (in bytes) of the write queue for a session before it's considered slow and disconnected (0 = unlimited)

AnyCable-Go Server

Option	Value	Env	Default	Description
--allowed_origins	yes	ANYCABLE_ALLOWED_ORIGINS	—	Accept requests only from specified origins, e.g., "www.example.com,*example.io". No check is performed if empty
--broadcast_key	yes	ANYCABLE_BROADCAST_KEY	—	An authentication key for broadcast requests
--health-path	yes	ANYCABLE_HEALTH_PATH	"/health"	HTTP health endpoint path
--host	yes	ANYCABLE_HOST	"localhost"	Server host
--max-conn	yes	ANYCABLE_MAX_CONN	0	Limit simultaneous server connections (0 – without limit)
--noauth	—	ANYCABLE_NOAUTH	false	[DANGER ZONE] Disable client authentication over RPC
--path	yes	ANYCABLE_PATH	"/cable"	WebSocket endpoint path (you can specify multiple paths using comma as separator)
--port	yes	ANYCABLE_PORT, $PORT	8080	Server port
--public	—	ANYCABLE_PUBLIC	false	[DANGER ZONE] Run server in the public mode allowing all connections and stream subscriptions
--secret	yes	ANYCABLE_SECRET	—	A common secret key used by all features by default
--shutdown_delay	yes	ANYCABLE_SHUTDOWN_DELAY	0	Sleep time before shutting down (in seconds)
--shutdown_timeout	yes	ANYCABLE_SHUTDOWN_TIMEOUT	30	Graceful shutdown timeout (in seconds)

API

Option	Value	Env	Default	Description
--api_path	yes	ANYCABLE_API_PATH	"/api"	API endpoint base path
--api_port	yes	ANYCABLE_API_PORT	0	API server port (0 = use main server port)
--api_secret	yes	ANYCABLE_API_SECRET	—	Secret token to authenticate API requests

Broadcasting

Option	Value	Env	Default	Description
--broadcast_adapter	yes	ANYCABLE_BROADCAST_ADAPTER	—	Broadcasting adapter to use (http, redisx, redis or nats). You can specify multiple at once via a comma-separated list
--broker	yes	ANYCABLE_BROKER	—	Broker engine to use (memory)
--nats_channel	yes	ANYCABLE_NATS_CHANNEL	"__anycable__"	NATS channel for broadcasts
--pubsub	yes	ANYCABLE_PUBSUB	—	Pub/Sub adapter to use (redis or nats)
--redis_channel	yes	ANYCABLE_REDIS_CHANNEL	"__anycable__"	Redis channel for broadcasts

Broker

Option	Value	Env	Default	Description
--history_limit	yes	ANYCABLE_HISTORY_LIMIT	100	Max number of messages to keep in the stream's history
--history_ttl	yes	ANYCABLE_HISTORY_TTL	300	TTL for messages in streams history (seconds)
--presence_ttl	yes	ANYCABLE_PRESENCE_TTL	15	TTL for presence information (seconds)
--sessions_ttl	yes	ANYCABLE_SESSIONS_TTL	300	TTL for expired/disconnected sessions (seconds)

Disconnector

Option	Value	Env	Default	Description
--disconnect_mode	yes	ANYCABLE_DISCONNECT_MODE	"auto"	Define when to call Disconnect callback (always, never, auto)

Durable Streams

Option	Value	Env	Default	Description
--ds	—	ANYCABLE_DS	false	Enable Durable Streams endpoint
--ds_path	yes	ANYCABLE_DS_PATH	"/ds"	Durable Streams endpoint path
--ds_poll_interval	yes	ANYCABLE_DS_POLL_INTERVAL	10	Durable Streams long polling interval (seconds)
--ds_skip_auth	—	ANYCABLE_DS_SKIP_AUTH	false	Disable client authentication for Durable Streams (only authorize stream access)
--ds_sse_ttl	yes	ANYCABLE_DS_SSE_TTL	60	Durable Streams SSE connections time-to-live (seconds)

Embedded NATS

Option	Value	Env	Default	Description
--embed_nats	—	ANYCABLE_EMBED_NATS	false	Enable embedded NATS server and use it for pub/sub
--enats_cluster_name	yes	ANYCABLE_ENATS_CLUSTER_NAME	"anycable-cluster"	NATS cluster name
--enats_cluster_routes	yes	ANYCABLE_ENATS_CLUSTER_ROUTES	—	Comma-separated list of known cluster addresses
--enats_gateway_advertise	yes	ANYCABLE_ENATS_GATEWAY_ADVERTISE	—	NATS gateway advertise address
--enats_gateways	yes	ANYCABLE_ENATS_GATEWAYS	—	Semicolon-separated list of known gateway configurations: name_a:gateway_1,gateway_2;name_b:gateway_4
--enats_max_payload	yes	ANYCABLE_ENATS_MAX_PAYLOAD	0	Maximum message payload size in bytes (0 uses the NATS default of 1MB)
--enats_server_name	yes	ANYCABLE_ENATS_SERVER_NAME	—	Embedded NATS unique server name (required for JetStream), auto-generated by default

HTTP Broadcast

Option	Value	Env	Default	Description
--http_broadcast_path	yes	ANYCABLE_HTTP_BROADCAST_PATH	"/_broadcast"	HTTP pub/sub endpoint path
--http_broadcast_port	yes	ANYCABLE_HTTP_BROADCAST_PORT	0	HTTP pub/sub server port

JWT

Option	Value	Env	Default	Description
--enforce_jwt	—	ANYCABLE_ENFORCE_JWT	false	Whether to enforce token presence for all connections
--jwt_param	yes	ANYCABLE_JWT_PARAM	"jid"	The name of a query string param or an HTTP header carrying a token
--jwt_secret	yes	ANYCABLE_JWT_SECRET	—	The encryption key used to verify JWT tokens

Log

Option	Value	Env	Default	Description
--debug	—	ANYCABLE_DEBUG	false	Enable debug mode (more verbose logging)
--log_format	yes	ANYCABLE_LOG_FORMAT	"text"	Set logging format (text/json)
--log_level	yes	ANYCABLE_LOG_LEVEL	"info"	Set logging level (debug/info/warn/error)

Metrics

Option	Value	Env	Default	Description
--metrics_host	yes	ANYCABLE_METRICS_HOST	—	Server host for metrics endpoint
--metrics_http	yes	ANYCABLE_METRICS_HTTP	—	Enable HTTP metrics endpoint at the specified path
--metrics_log	—	ANYCABLE_METRICS_LOG	false	Enable metrics logging (with info level)
--metrics_log_filter	yes	ANYCABLE_METRICS_LOG_FILTER	—	Specify list of metrics to print to log (to reduce the output)
--metrics_port	yes	ANYCABLE_METRICS_PORT	0	Server port for metrics endpoint, the same as for main server by default
--metrics_rotate_interval	yes	ANYCABLE_METRICS_ROTATE_INTERVAL	15	Specify how often flush metrics to writers (logs, statsd) (in seconds)
--metrics_tags	yes	ANYCABLE_METRICS_TAGS	—	Comma-separated list of default (global) tags to add to every metric
--stats_refresh_interval	yes	ANYCABLE_STATS_REFRESH_INTERVAL	5	How often to refresh the server stats (in seconds)

Misc

Option	Value	Env	Default	Description
--presets	yes	ANYCABLE_PRESETS	—	Configuration presets, comma-separated (none, fly, heroku, broker). Inferred automatically

NATS

Option	Value	Env	Default	Description
--nats_servers	yes	ANYCABLE_NATS_SERVERS	"nats://127.0.0.1:4222"	Comma separated list of NATS cluster servers

Ping

Option	Value	Env	Default	Description
--enable_native_pings	—	ANYCABLE_ENABLE_NATIVE_PINGS	false	Send native pings (e.g., WebSocket ping frames) along with application-level pings to keepalive clients using custom protocols
--ping_interval	yes	ANYCABLE_PING_INTERVAL	3	Action Cable ping interval (in seconds)
--pong_timeout	yes	ANYCABLE_PONG_TIMEOUT	0	How long to wait for a pong response before disconnecting the client (in seconds). Zero means no pongs required

Pusher

Option	Value	Env	Default	Description
--pusher_api_port	yes	ANYCABLE_PUSHER_API_PORT	0	Port for Pusher HTTP API (0 = use the main server port)
--pusher_app_id	yes	ANYCABLE_PUSHER_APP_ID	—	Pusher application ID
--pusher_app_key	yes	ANYCABLE_PUSHER_APP_KEY	—	Pusher application key
--pusher_secret	yes	ANYCABLE_PUSHER_SECRET	—	Pusher secret

Redis X Broadcast

Option	Value	Env	Default	Description
--redisx_stream	yes	ANYCABLE_REDISX_STREAM	"__anycable__"	Redis X broadcaster stream name

Redis

Option	Value	Env	Default	Description
--redis_sentinels	yes	ANYCABLE_REDIS_SENTINELS	—	Comma separated list of sentinel hosts, format: 'hostname:port,..'
--redis_tls_ca_cert_path	yes	ANYCABLE_REDIS_TLS_CA_CERT_PATH	—	Path to the CA certificate file to verify the Redis server certificate
--redis_tls_client_cert_path	yes	ANYCABLE_REDIS_TLS_CLIENT_CERT_PATH	—	Path to the client TLS certificate file for mutual TLS with Redis
--redis_tls_client_key_path	yes	ANYCABLE_REDIS_TLS_CLIENT_KEY_PATH	—	Path to the client TLS private key file for mutual TLS with Redis
--redis_url	yes	ANYCABLE_REDIS_URL, $REDIS_URL	"redis://localhost:6379"	Redis url

RPC

Option	Value	Env	Default	Description
--headers	yes	ANYCABLE_HEADERS	"cookie"	List of headers to proxy to RPC
--http_rpc_secret	yes	ANYCABLE_HTTP_RPC_SECRET	—	Authentication secret for RPC over HTTP
--norpc	—	ANYCABLE_NORPC	false	Disable RPC component and run server in the standalone mode
--proxy-cookies	yes	ANYCABLE_PROXY_COOKIES	—	Cookie keys to send to RPC, default is all
--rpc_concurrency	yes	ANYCABLE_RPC_CONCURRENCY	28	Max number of concurrent RPC request; should be slightly less than the RPC server concurrency
--rpc_host	yes	ANYCABLE_RPC_HOST	"localhost:50051"	RPC service address (full URL in case of HTTP RPC)
--rpc_request_timeout	yes	ANYCABLE_RPC_REQUEST_TIMEOUT	0	RPC requests timeout (in ms)

Server-Sent Events

Option	Value	Env	Default	Description
--sse	—	ANYCABLE_SSE	false	Enable SSE endpoint
--sse_path	yes	ANYCABLE_SSE_PATH	"/events"	SSE endpoint path

Signed Streams

Option	Value	Env	Default	Description
--cable_ready	—	ANYCABLE_CABLE_READY	false	Enable Cable Ready support
--cable_ready_secret	yes	ANYCABLE_CABLE_READY_SECRET	—	A custom secret to verify CableReady streams
--public_streams	—	ANYCABLE_PUBLIC_STREAMS	false	Enable public (unsigned) streams
--streams_presence	—	ANYCABLE_STREAMS_PRESENCE	true	Enable presence for signed pub/sub streams
--streams_secret	yes	ANYCABLE_STREAMS_SECRET	—	Secret you use to sign stream names
--streams_whisper	—	ANYCABLE_STREAMS_WHISPER	false	Enable whispering for signed pub/sub streams
--turbo_streams	—	ANYCABLE_TURBO_STREAMS	false	Enable Turbo Streams support
--turbo_streams_secret	yes	ANYCABLE_TURBO_STREAMS_SECRET	—	A custom secret to verify Turbo Streams

SSL

Option	Value	Env	Default	Description
--ssl_cert	yes	ANYCABLE_SSL_CERT	—	SSL certificate path
--ssl_key	yes	ANYCABLE_SSL_KEY	—	SSL private key path

StatsD

Option	Value	Env	Default	Description
--statsd_host	yes	ANYCABLE_STATSD_HOST	—	Server host for metrics sent to statsd server in the format <host>:<port>
--statsd_prefix	yes	ANYCABLE_STATSD_PREFIX	"anycable_go."	Statsd metrics prefix
--statsd_tags_format	yes	ANYCABLE_STATSD_TAGS_FORMAT	"datadog"	One of "datadog", "influxdb", or "graphite"

WebSockets

Option	Value	Env	Default	Description
--ws_write_timeout	yes	ANYCABLE_WS_WRITE_TIMEOUT	2	Maximum time to wait for a write operation to complete

Pro-only options

These options are available in AnyCable Pro and AnyCable+, on top of everything above. Generated from a Pro build (1.6.14-pro).

Option	Value	Env	Default	Description
--admin	—	ANYCABLE_ADMIN	false	Enable admin console
--admin_path	yes	ANYCABLE_ADMIN_PATH	"/_high_voltage_"	Admin console HTTP root
--admin_port	yes	ANYCABLE_ADMIN_PORT	0	Admin console server port (set to 0 to run on the same port as the main server)
--admin_secret	yes	ANYCABLE_ADMIN_SECRET	—	Authentication secret for admin actions
--graphql_action	yes	ANYCABLE_GRAPHQL_ACTION	"execute"	GraphQL Ruby channel action (method) name
--graphql_channel	yes	ANYCABLE_GRAPHQL_CHANNEL	"GraphqlChannel"	GraphQL Ruby channel class name
--graphql_idle_timeout	yes	ANYCABLE_GRAPHQL_IDLE_TIMEOUT	2	Defines for how long to wait for connection_init (in seconds)
--graphql_path	yes	ANYCABLE_GRAPHQL_PATH	—	Enable GraphQL proxy and mount at the specified path
--poll	—	ANYCABLE_POLL	false	Enable long polling support
--poll_flush_interval	yes	ANYCABLE_POLL_FLUSH_INTERVAL	500	Long polling flush interval (in milliseconds)
--poll_interval	yes	ANYCABLE_POLL_INTERVAL	15	Long polling interval (in seconds)
--poll_keepalive_timeout	yes	ANYCABLE_POLL_KEEPALIVE_TIMEOUT	5	Long polling keepalive timeout (in seconds)
--poll_max_request_size	yes	ANYCABLE_POLL_MAX_REQUEST_SIZE	65536	Long polling maximum request body size (in bytes)
--poll_path	yes	ANYCABLE_POLL_PATH	"/lp"	Long polling endpoint path
--ocpp_channel	yes	ANYCABLE_OCPP_CHANNEL	"OCPPChannel"	OCPP Action Cable channel class name
--ocpp_granular_actions	—	ANYCABLE_OCPP_GRANULAR_ACTIONS	true	Translate each OCPP command into its own action
--ocpp_heartbeat_interval	yes	ANYCABLE_OCPP_HEARTBEAT_INTERVAL	30	Default heartbeat interval in seconds. Note: current Pro builds (≤ 1.6.14-pro) spell this --ocpp_hearbeat_interval / ANYCABLE_OCPP_HEARBEAT_INTERVAL (a known typo); use that spelling until the fix ships.
--ocpp_path	yes	ANYCABLE_OCPP_PATH	—	WebSocket endpoint path prefix to accept OCPP connections
--rpc_concurrency_initial	yes	ANYCABLE_RPC_CONCURRENCY_INITIAL	25	Initial concurrency (adaptive)
--rpc_concurrency_max	yes	ANYCABLE_RPC_CONCURRENCY_MAX	100	Max concurrency (adaptive)
--rpc_concurrency_min	yes	ANYCABLE_RPC_CONCURRENCY_MIN	5	Min concurrency (adaptive)
--shutdown_slowdrain	—	ANYCABLE_SHUTDOWN_SLOWDRAIN	false	Enable slow draining of connections during shutdown
--netpoll_enabled	—	ANYCABLE_NETPOLL_ENABLED	true	Whether to use net polling (epoll, kqueue)