Developer depth

Build With Explicit Contracts And Runtime Guardrails

Zentra is designed for teams that need typed APIs, replay-safe callbacks, and operator-visible traces before the first production cutover.

Docs
  • 01Versioned contracts
  • 02Replay-safe callbacks
  • 03Tenant-scoped auth

Stable APIs

v1

Versioned contract discipline.

Webhook Auth

HMAC

Signature verification required.

Write Safety

Idempotent

Replay-safe financial operations.

Auth Boundaries

Tenant Aware

Scoped access across environments.

First transaction path

Create a transfer. Receive a webhook. Inspect the ledger.

The developer path should feel immediate and testable, with sandbox, docs, webhook verification, and ledger state connected in one flow.

Get Started
Docs
Book Architecture Review

create runtime intent

await zentra.runtime.intents.create({
  intent_id: "intent_042",
  scope: "workspace_scope",
  money_model: "minor_units + ledger_currency",
  primitives: ["policy", "ledger", "events"]
})

System response

status

controlled

ledger_state

entry_042

event_stream

synchronized

audit_packet

ready

The first API call should show what happened in the product: state, ledger, webhook, and evidence.

Webhook replay

01timeoutevent money_runtime.synchronizedretained
02signature verifiedevent money_runtime.synchronizedretrying
03deliveredevent money_runtime.synchronizedresolved

Result: one ledger-safe state transition

Delivery state remains visible without creating duplicate financial state.

Integration resources

Docs, SDKs, and runbooks built around the way production actually fails.

Start with stable contracts, validate replay-safe webhook behavior, and promote the same semantics to production without changing the operating language.

API Reference

Versioned contract documentation for payment-critical endpoints.

Open resource

SDK Guides

Language-specific integration workflows and samples.

Open resource

Webhook Patterns

Signature verification, retries, and replay-safe consumer handling.

Open resource

Production Playbooks

Rollout guidance for sandbox-to-production promotion.

Open resource

01

Input

Experience edge

  • Web App
  • iOS App
  • Partner Portal

02

Decision

Control plane

  • Mobile API
  • Service Mesh
  • Policy Engine

03

Evidence

Money state

  • Ledger Engine
  • Transfers
  • Cards

Deterministic money movement and tenant isolation enforced across every layer.

request > policy > ledger > evidence

  • Versioned route boundaries and predictable schema evolution.
  • Stable error semantics for reconciliation and runbook automation.
  • Backward-compatible migration paths for long-lived clients.

Sandbox parity

Sandbox pathways are contract-equivalent to production endpoints.

Environment tiers

Webhook resilience

Callback handling is designed for retries, timeouts, and replay safety.

Webhook route

Security controls

Never process callback payloads before signature verification.

Security docs
Never process webhook payloads before signature verification, and never apply money-affecting writes without idempotency checks.