Cbox Nexus

Cbox Nexus answers one question, per US state: has this seller triggered an economic-nexus registration obligation? It is a pure engine — it owns the decision, and sources the data behind contracts.

Mental model

thresholds (us-tax-data) ─┐
seller activity (host)   ─┤
physical presence (host) ─┼─▶  NexusEngine  ─▶  NexusEvaluation per state
registrations (host)     ─┘                      └▶ NexusReport (roll-up)

Each state resolves to a NexusStatus: Registered → Triggered (physical or economic) → Approaching → Below, in that precedence.

Sections

• Getting started — install, and test with the fakes.
• Core concepts — the decision model and thresholds.
• Cookbook — evaluate a state, build a platform report.
• Extension points — the data seams you bind.
• Configuration — the config keys.