GET /api/v1/plans endpoint.
Default plan tiers:
Plan features by tier:
- Starter: core billing + entitlements
- Growth: + revenue_analytics, remove_branding_watermark, auto_dunning, progressive_billing, lifetime_usage
- Scale: + all integrations (netsuite, xero, hubspot, salesforce, okta, avalara), api_permissions, custom_roles, forecasted_usage, security_logs, from_email, issue_receipts, manual_payments, multi_entities_pro