Guides
Narrative walkthroughs for the Helium MVNE platform. Pair these with the API reference for endpoint-level detail.
Get started
- QuickstartFrom invite-accept to first webhook in 10 minutes, curl-only.
- AuthenticationPublishable vs restricted keys, rotation, bearer-token mechanics.
- Roles & permissionsThe operator RBAC matrix — team roles, the permission grid, and CPNI step-up for PII.
- Environments & modeSandbox vs live, Stripe-style. Key scoping and graduation.
Platform primitives
- Idempotency24h replay window, scoping, safe retries.
- Rate limitingTiers, response headers, backoff strategy.
- WebhooksRegistration, HMAC verification, retries, dead-letter, redelivery.
- ErrorsProblem Details, error-code catalog, common 4xx patterns.
Resources
- Subscribers & subscriptionsEnd-user records and subscription lifecycle.
- SIMs lifecycleState machine + polling semantics, with a state diagram.
- Port-in / port-outSequence + state diagrams for the MNP handshake.
- Plans & addonsOperator-defined catalog built on top of carrier profiles.
- Carrier connectionsPer-environment carrier credentials. T-Mobile in v1.
- TaxTax connectors (Avalara CommTax first), product tax codes, quote vs. commit.
Testing & reference
- Testing in sandboxDashboard-driven triggers, clock, seed scenarios.
- Event catalogEvery webhook event type, payload, and when it fires.