Case studies

Amazon SP-API Optimization for Agency

Amazon SP-API Fees Optimization by Deltologic

Client:

Vaso Group

Location:

USA

Budget:

$ 130 000

Industry:

Amazon Agency

Highlights:

Audited and optimized VASO’s SP-API usage to cut redundant GET calls.
Replaced polling with Notifications API and bulk reports.
Improved catalog and image sync logic for smarter updates.
Reduced GET volume by 85% and ensured fee-ready architecture.

Deltologic optimized our SP-API architecture, cutting costs and improving performance while keeping our workflows seamless.

Tyrel Fuchs

Data Engineer at Vaso Group

Introduction to VASO Group

VASO Group is a full-service Amazon agency in the USA that helps brands scale on Amazon with content, advertising, data analytics and automation.

The Challenge

As Amazon announced new SP-API fees beginning in 2026 (annual subscription + usage-based for GET calls), VASO saw that their high-volume data connector platform—handling product onboarding, catalog management, brand/category/tag mapping, listing publication, image management, and reporting - was making extensive GET calls to Amazon’s APIs. Without optimization, this would drive up their future SP-API costs significantly.

Scope of work

SP-API Optimization Audit

Performed a full review of VASO’s SP-API usage to identify redundant GET requests and high-cost operations.

Event-Driven Architecture

Replaced polling mechanisms with Notifications API and automated workflows to reduce unnecessary API traffic.

Data Synchronization Efficiency

Optimized catalog, listing, and image synchronization processes to update only when data changes.

Reporting and Reconciliation

Implemented report-based data retrieval and smart reconciliation logic to ensure accuracy while minimizing API usage.

2+

Years of working together

4

Team member involved

85%

API Calls Optimized

Results

Thanks to these changes:

VASO’s GET call volume dropped by over 85%
Their platform is now aligned with Amazon’s 2026 SP-API fee structure, avoiding steep additional costs
System performance improved: faster syncs, fewer redundant operations, less server load
Their tech stack is future-proofed for scale without surprise fee spikes

Highlights

~85% GET request reduction
Fee-ready architecture ahead of Amazon’s 2026 rollout
Enhanced data accuracy via reconciliation processes
Automated workflows replacing manual or polling-based activities

Summary

With Deltologic’s SP-API Optimization service, VASO Group locked in major cost savings, improved operational performance and secured their Amazon integrations against the upcoming fee model. Their data-driven workflows are now more efficient and scalable.

"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."

Tyrel Fuchs

Data Engineer at Vaso Group

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