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Legacy System API Integration Bridge (SAP, DATEV, Lexware)

Legacy System API Integration Bridge (SAP, DATEV, Lexware)

Custom API bridges linking modern AI automation workflows to legacy ERP and accounting backbones (SAP, DATEV, Lexware).
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Inquiry & Quotation Information
Scope, project start, and acceptance criteria are agreed in the individual quotation.
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SERVICE SPECIFICATION · IGN-S07

Legacy System API Integration Bridge (SAP, DATEV, Lexware)

Tier: Specialized Architecture & Advisory Solution (€8,500) · Implementation: 12 Business Days

Request a Scoping Call →

1. Scope of Deliverables

  • ✓ Bi-directional API bridge between legacy accounting/ERP systems and modern automation workflows
  • ✓ Automated master data and invoice export/import routines (e.g. DATEV ASCII / XML format)
  • ✓ Error-handling queue with automated retry logic and dead-letter notification
  • ✓ Interface technical specification and security documentation

2. Milestones & Sign-Off

Phase 1 — Data Mapping & Interface Development (50%)Field transformation rules and authentication setup.
Phase 2 — Reconciliation Testing & Sign-Off (50%)Parallel run verification with historical transaction batches.

3. Prerequisites & Infrastructure

Client Prerequisites: API credentials / interface documentation for legacy system, test environment access.

Infrastructure & Compliance: Hosted on dedicated German cloud infrastructure (Hetzner ISO 27001). Designed to support traceable operations and GoBD-aligned digital records (§ 238, § 257 HGB). Technical scoping supports public grant co-funding applications (e.g. Hamburg Digital Check, up to 50% of eligible advisory costs).