Selling Partner API (SP-API)

Production-ready SP-API integrations for serious sellers

Inventory, orders, catalog, pricing, reports, and notifications—wired securely into your ERP, WMS, data warehouse, or internal tools. Built for uptime, rate limits, and long-term maintenance.

500+

Shipped integrations

99.9%

Target uptime

24/7

Automation

Foundation

What is Amazon Selling Partner API?

Selling Partner API (SP-API) is Amazon’s modern REST-based surface for programmatic access to orders, inventory, listings, pricing, reports, and operational data. It succeeds legacy MWS with clearer auth models, granular roles, and APIs aligned to how sellers operate today.

Practically, SP-API lets you automate reconciliation, fulfillment workflows, catalog updates, and analytics—while keeping security and compliance aligned with Amazon’s expectations.

Near real-time operational data
Automation across catalog & fulfillment
Architectures that scale with volume
OAuth-aligned access & least privilege

End-to-end automation

Orchestrate orders, inventory, shipments, and notifications with idempotent jobs, retries, and observability.

Reporting & BI

Pull structured reports and feeds into your warehouse or dashboards for finance, ops, and growth teams.

Systems integration

Connect Seller Central data to ERP, WMS, OMS, or custom apps using stable contracts and documented runbooks.

Solutions

SP-API capabilities we design & build

Focused engagement models—from tactical integrations to fully managed automation platforms.

Order management

Order management

Ingest orders, track statuses, and coordinate fulfillment with dependable polling and notification handling.

  • Order ingestion & acknowledgements
  • Shipment confirmations
  • High-volume batch flows
  • Multi-channel handoffs
Inventory & inbound

Inventory & inbound

Keep stock positions truthful across channels with disciplined sync windows and exception handling.

  • FBA & MFN quantity sync
  • Inbound shipment visibility
  • Low-stock signals
  • Multi-warehouse logic
Pricing & competitiveness

Pricing & competitiveness

Implement repricing and guardrails that respect margin floors and marketplace policies.

  • Rule-based price updates
  • Competitive signals
  • Buy Box strategy support
  • Profit protection
Listings & catalog

Listings & catalog

Bulk listing workflows, content updates, and variation maintenance with validation upfront.

  • Feeds & listings APIs
  • Content QA checkpoints
  • Variation modeling
  • Issue remediation
Advertising workflows

Advertising workflows

Pair marketplace ops with advertising data where it matters—often alongside our Advertising API work.

  • Campaign ops automation
  • Structured exports
  • Performance rollups
  • Cross-team reporting
Advertising API
Reports & analytics

Reports & analytics

Automate report requests, parse outputs, and land clean datasets for finance and leadership.

  • Scheduled reporting
  • P&L-ready datasets
  • SLA monitoring
  • Custom dashboards
Coverage map

SP-API domains we work across

Representative areas—your build may combine multiple APIs, queues, and data stores.

Orders & fulfillment

  • Orders API
  • Feeds & notifications
  • Fulfillment outbound
  • Merchant fulfillment
  • Vendor PO flows
  • Shipment tracking

Inventory & FBA

  • FBA inventory
  • Inbound plans
  • Replenishment signals
  • Multi-location stock
  • Fee & reimbursement exports
  • Removal workflows

Pricing & merchandising

  • Listings items
  • Catalog submissions
  • Pricing automation hooks
  • A+ where applicable
  • Buy Box analytics inputs
  • Feeds orchestration

Analytics & finance

  • Sales & traffic reports
  • Settlement views
  • Profit modeling inputs
  • Account health signals
  • Operational KPIs
  • Executive summaries
Why Coretech3

Engineering partner—not a one-off script shop

We ship integrations that survive peak events: backoff strategies, structured logging, alerting, and documentation your team can operate. Engagements range from targeted APIs to multi-workstream automation programs.

Faster time-to-value

Reuse proven patterns for auth, token rotation, sandbox validation, and production cutover—without sacrificing your edge cases.

Security-minded delivery

Least-privilege roles, secret hygiene, and operational guardrails aligned with how Amazon expects SP-API clients to behave.

Amazon seller operations dashboard

What teams gain

Operational efficiency

Less manual reconciliation and fewer spreadsheet bridges.

Consistent data

One operational truth flowing to finance and ops.

Scalable throughput

Architectures that tolerate spikes and growing SKU counts.

Clear decisions

Timely metrics instead of stale exports.

Lower unit cost

Automation amortizes engineering across volume.

Competitive responsiveness

React faster on inventory, pricing, and fulfillment.

Delivery

How we run an SP-API program

Transparent phases—from discovery through hypercare—so stakeholders always know what ships next.

01

Discovery & scope

Map workflows, systems, data contracts, SLAs, and compliance constraints.

02

Auth & apps

Register developer assets, roles, redirect URIs, and token lifecycle handling.

03

Build & integrate

Implement APIs, queues, stores, and internal UX with code review and observability.

04

Sandbox validation

Exercise edge cases, backoff paths, and reconciliation checks before production traffic.

05

Launch

Progressive rollout, monitoring, and rollback plans aligned with your ops cadence.

06

Operate & improve

Maintenance windows, dependency upgrades, and iterative enhancements.

Modernization

Migrate from MWS to SP-API

If you still depend on legacy MWS endpoints, we map functional parity, refactor authentication, and validate feeds and reports under SP-API—minimizing downtime and surprises during cutover.

Controlled transition

Dual-running where practical, with reconciliation checkpoints between systems.

Capability uplift

Adopt newer primitives where they simplify operations—without boiling the ocean.

Why migrate now

Modern REST contracts

Easier to integrate with contemporary services and observability stacks.

Stronger auth patterns

OAuth flows and constrained roles reduce accidental exposure.

Access to new APIs

Features and datasets not exposed via legacy surfaces.

Operational clarity

Better alignment with Amazon’s platform roadmap and notices.

Future compliance

Stay aligned as marketplace requirements evolve.

Plan your next SP-API release with us

Tell us about your catalog size, marketplaces, internal systems, and SLAs—we’ll propose an architecture and milestone plan that fits how your team actually ships.