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.

DocsDocs
  • 01Versioned contracts
  • 02Replay-safe callbacks
  • 03Tenant-scoped auth
Fig 01first transaction path

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

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

POST /v1/transfersrequest
curl https://api.usezentra.com/v1/transfers \
  -H "Authorization: Bearer sk_live_..." \
  -H "Idempotency-Key: tr_9f2c4a" \
  -d amount=250000 \
  -d currency=NGN \
  -d destination=acct_7d1e88

product consequence

status
transfer.processing
event
transfer.settled
evidence
audit_packet
trace
trace_9f2c4a
Fig 02integration 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.

01

API Reference

Versioned contract documentation for payment-critical endpoints.

02

SDK Guides

Language-specific integration workflows and samples.

03

Webhook Patterns

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

04

Production Playbooks

Rollout guidance for sandbox-to-production promotion.

Fig 03integration depth

Three disciplines separate a demo integration from a production one.

01

Contract-first integration

Build against stable APIs with typed expectations.

  • Versioned route boundaries and predictable schema evolution.
  • Stable error semantics for reconciliation and runbook automation.
  • Backward-compatible migration paths for long-lived clients.
02

Replay-safe event handling

Treat webhooks as distributed systems inputs, not simple callbacks.

  • Verify signatures before processing any event payload.
  • Use idempotency keys to prevent duplicate side effects.
  • Implement timeout-aware retries with explicit dead-letter handling.
03

Operate with clear visibility

Keep request tracing and tenant context visible in every environment.

  • Correlate requests and events through end-to-end IDs.
  • Separate sandbox and production telemetry to avoid false confidence.
  • Enforce role and tenant scope boundaries in every console workflow.
Fig 04operating rules

Rules that hold when the happy path breaks.

These are not aspirations — they are the constraints the platform enforces and the docs assume. Integrations that respect them survive retries, replays, and audits.

Security Docs
01

Sandbox parity

Sandbox pathways are contract-equivalent to production endpoints, so promotion changes credentials — not semantics.

02

Webhook resilience

Callback handling is designed for retries, timeouts, and replay safety. Never process a payload before signature verification.

03

Money-write discipline

Never apply money-affecting writes without idempotency checks. Duplicate deliveries must converge to one side effect.