Global Variables are key-value pairs shared across all workflows on a Nodlyn instance. Use them for API URLs, credentials references, counters, and last-processed timestamps without hard-coding values in every node.
Syntax
In any node setting, reference a global key with {{$var.keyName}}. Nodlyn resolves placeholders at runtime before the node executes.
{{$var.apiUrl}}— shared base URL{{$var.lastRunId}}— updated by a prior run
Manage values
Open the Jobs panel → Variables tab → Global. Add, edit, or delete keys directly in Studio. Changes apply to the next run.
Workflow-scoped variables
Variables can also be scoped to a single workflow. Use Read Variable and Write Variable nodes, or set keys under Jobs → Variables → Workflow. Global scope takes precedence when both exist.
Inspector hint
Fields containing {{$var.*}} show a violet highlight and a “Uses global variables” badge in the Inspector.
Runtime export
Global and workflow variables are included in the runtime agent manifest and seeded when an exported agent starts — including multi-workflow bundles.