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DL-001 · Case study

Amazon SP-API optimization for an agency

VASO Group's data platform made heavy SP-API GET calls. We audited usage, moved it to notifications and reports, and cut GET volume by over 85% before Amazon's 2026 fees.

Client
Vaso Group
Location
USA
Industry
Amazon Agency
Capabilities
01Audit02Stabilize
01

Challenge

  • Amazon announced SP-API fees from 2026: annual subscription plus usage-based GET calls.
  • VASO's connector platform made extensive GET calls across catalog, listings, images and reporting.
  • Without optimization, future SP-API costs would rise significantly.
02

Environment

  • Full-service US Amazon agency: content, advertising, data analytics and automation.
  • High-volume connector for product onboarding, catalog management and listing publication.
  • Brand, category and tag mapping, image management and reporting on SP-API.
03

Intervention

  • Full SP-API usage audit to find redundant GET requests and high-cost operations.
  • Replaced polling with the Notifications API and automated workflows.
  • Catalog, listing and image sync now updates only when data changes.
  • Report-based retrieval with reconciliation logic to keep data accurate.
04

Outcome

  • GET call volume dropped by over 85%.
  • Platform aligned with Amazon's 2026 SP-API fee structure.
  • Faster syncs, fewer redundant operations, less server load.
Polling against the SP-API is replaced by Notifications API events and bulk reports feeding a change-only sync engine that updates the agency platform and reconciles data.GET loopsupdatesSP-APICatalog / listingsPOLLINGRetiredNOTIFICATIONSChange eventsBULK REPORTSReport retrievalSYNC ENGINEChange-onlyVASO PLATFORMCatalog / imagesRECONCILEAccuracy checks
  1. 01SP-APICatalog / listingsPOLLINGRetiredGET loops
  2. 02SP-APICatalog / listingsNOTIFICATIONSChange events
  3. 03SP-APICatalog / listingsBULK REPORTSReport retrieval
  4. 04NOTIFICATIONSChange eventsSYNC ENGINEChange-only
  5. 05BULK REPORTSReport retrievalSYNC ENGINEChange-only
  6. 06SYNC ENGINEChange-onlyVASO PLATFORMCatalog / imagesupdates
  7. 07SYNC ENGINEChange-onlyRECONCILEAccuracy checks
Fig. 01From polling to event-driven syncPolling against the SP-API is replaced by Notifications API events and bulk reports feeding a change-only sync engine that updates the agency platform and reconciles data.Scale NTS

Results, as published.

85%
Reduction in GET call volume
2+
Years of working together
4
Team members involved

Client notes.

Client notes · DL-001Vaso Group
As the Data Engineer of an Amazon agency managing large-scale operations, I was impressed by how Deltologic optimized our SP-API architecture. Their team drastically reduced our API costs and improved system performance without disrupting our workflows. They truly operate like a partner, not just a vendor.
SignedTyrel FuchsData Engineer at Vaso Group

Stack and services.

Stack03

  • Amazon SP-API
  • Notifications API
  • SP-API Reports

Services used03

Tell us what has to work.

A senior engineer reads every brief. Describe the system, what it runs on today and what happens when it fails.

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