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Integration guideAccounting & tax

Xero → n8n review queue integration guide

Route approved accounting events into an operations queue with tenant-aware mapping and reconciliation.

By FirmWorkflows EditorialRevised October 14, 2026Design guidance

Define the integration contract

Route approved accounting events into an operations queue with tenant-aware mapping and reconciliation.

Contract item Design decision
Source event key tenant ID + event ID
Destination outcome review task
Record ownership The source system owns its authoritative business fields.
Delivery model Assume duplicates and delayed or out-of-order events until proven otherwise.
Live readiness Authenticate, sandbox-test, approve data handling, and assign an operator.

Map the fields

Source Destination Validation
tenant_id company_reference Verify authorized organization
resource_id source_record Fetch current state
event_id dedupe_key Reject repeated event
updated_at source_version Do not overwrite newer state
validation_errors review_reason Minimize diagnostic content

Implement the handoff

  • Create a least-privilege connection using the vendor’s supported authentication method. Keep secrets in the workflow credential store.
  • Receive and authenticate the event using current vendor guidance. Save a bounded job record, then process asynchronously where the provider’s acknowledgement deadline requires it.
  • Look up the tenant, source record, and mapping. If any identifier is ambiguous, create a review task instead of guessing.
  • Apply a durable duplicate-prevention key. Read the destination before retrying an action whose result is unknown.
  • Write the approved result and reconcile it against the expected business state. Record safe metadata and a reviewable outcome.

Failure and recovery checks

Failure Expected response
401 / expired authorization Stop this connection, alert its owner, and reauthorize through the approved process.
429 / rate limit Respect provider retry guidance and use a bounded backoff queue.
Invalid field or mapping Quarantine for correction; do not endlessly retry a bad payload.
Timeout after write Check the destination using the stable reference before repeating the action.
Missed events Run an approved periodic reconciliation against the source.

Test these integration-specific cases

  • A different tenant must never share the same mapping.
  • An expired OAuth connection creates an exception.
  • An event that arrives out of order must not regress state.

The starter files demonstrate transformation and review behavior with synthetic data. They do not include live credentials or pre-authorized vendor accounts. Confirm current API schemas, plan entitlements, region, pagination, and webhook verification in the vendor documentation before connecting a firm.

Sources & further reading

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