USA | Trusted by 100+ teams since 2017
Automate Your
Amazon Operations
with Advanced
SP-API Integration
We build custom Amazon seller platforms: SP-API integrated, AI-assisted, and built specifically for your workflow. Every build is scoped with a fixed price and a go-live date.
Trusted by 100+ sellers, agencies & aggregators
Get Your Free Demo
Fill in your details and we'll set up a personalised live demo of what your custom ecommerce software development would look like, no pitch deck, just your actual ops on screen.
Trusted by US & Global Sellers, Agencies & Aggregators
Since 2017. 50+ tools. 20+ marketplaces.
Real numbers from real builds for Amazon sellers and agencies.
All Your Ecommerce Operations, Unified in One System
From custom Amazon repricing software to inventory management software development — if it touches your Amazon ops, we've shipped it.
Custom Amazon SP-API Development
Build powerful Amazon integrations and automation systems to streamline inventory, orders, analytics, reporting, and marketplace operations with scalable API-driven solutions.
Buy Box & Repricing Solutions
Automate pricing strategies, improve Buy Box ownership, and maximise profitability with intelligent real-time repricing and competitor monitoring systems.
Amazon Seller Tool Development
Develop custom seller tools for accounting, financial reconciliation, fee calculation, profit tracking, and business performance monitoring to simplify ecommerce operations.
Ads, Inventory & Profit Systems
Optimise advertising performance, automate campaign management, track inventory, and monitor profitability with advanced PPC analytics and reporting solutions.
One platform. Every data source. Total control.
Your custom tool sits at the center — pulling from every channel, powering every output. No middleware between you and your data.
Data Inputs
Your Outputs
Self-driving ecommerce AI agents
that run your ops while you sleep.
Not just software you log into. AI automations that monitor, decide, and act across Amazon SP-API, Advertising API, Walmart, Shopify, and your back-office replacing “someone has to check this daily” seats on your org chart.
See the Agents in ActionListing Agent
Listing Optimization Agent
Audits ASINs, rewrites titles, bullets and A+ copy, regenerates lifestyle imagery, and pushes everything back to Seller Central on a schedule you control.
Ads Agent
PPC Automation Agent
Watches your campaigns continuously, adjusts bids and budgets within the limits you set against a margin-aware ROAS target, kills wasted spend, and flags cannibalization before it hits your P&L.
Reimbursement Agent
FBA Reimbursement Agent
Detects FBA losses, damaged and lost inventory, overcharged fees and returns fraud, assembles each claim with its evidence for your team to submit, and tracks every dollar of recovery.
Catalog Agent
Catalog & Pricing Agent
Syncs stock, pricing, and content across Amazon, Walmart, Shopify, eBay, TikTok, and 15+ other marketplaces with per-channel rules, no manual effort.
Review Agent
Review & Support Agent
Drafts on-brand review responses and buyer-message replies for your team to approve, and routes the hard ones to a person. Trained on your tone and policies.
Reporting Agent
Reporting & Finance Agent
Assembles weekly P&L, ad-spend deltas, and ops anomalies into a clean Slack or email briefing no analyst, no copy-paste, no manual dashboards.
From idea to production in 4 steps.
No surprises.
You'll know the architecture, fixed price, and delivery timeline before we write a single line of code.
30 MIN
Fit Call
We map your ops, your current SaaS stack, and the real cost of owning it instead. No pitch deck just your numbers.
1-2 WEEKS
Scope & Architecture
A written architecture doc: data model, SP-API surface, AI agents, timeline, and a fixed quote you can hold us to.
2-6 WEEKS
Build in Sprints
Live Friday demos. We ship to your staging, you stress-test with real Amazon data, and we iterate until it's right.
DAY 1
Launch & Own It
You keep the custom code we build, the infra and the docs, under your own AWS account. We stay on as long as you want, or hand off cleanly.
30 MIN
Fit Call
We map your ops, your current SaaS stack, and the real cost of owning it instead. No pitch deck just your numbers.
1-2 WEEKS
Scope & Architecture
A written architecture doc: data model, SP-API surface, AI agents, timeline, and a fixed quote you can hold us to.
2-6 WEEKS
Build in Sprints
Live Friday demos. We ship to your staging, you stress-test with real Amazon data, and we iterate until it's right.
DAY 1
Launch & Own It
You keep the custom code we build, the infra and the docs, under your own AWS account. We stay on as long as you want, or hand off cleanly.
What our customers are saying.
On-camera stories from the sellers, agencies and tool-builders we've partnered with — plus a few kind words from the inbox.
Ecomsellertool rebuilt our entire ops stack on React + Python with direct SP-API and Advertising API integration. We killed five subscriptions, cut report prep from 2 days to 10 minutes, and the dashboards look better than anything we were paying for.
Great job! We were very pleased with Ecomsellertool's work and would highly recommend them for detail-oriented projects. Always available, always on follow-through. Will definitely rehire.
Solid communicator and extremely knowledgeable team. They walked me through every piece of Amazon's SP system with patience. Anyone who appreciates honesty and clear communication should hire them.
Perfect experience! Love working with Ecomsellertool and his team.
Done stacking SaaS subscriptions?
Let's build your custom Amazon seller tool.
A 30-minute demo call. No pitch deck. We map your ops, your current SaaS spend, and what your custom Amazon seller software could look like, with a fixed price and a go-live date.
Book Free Demo Now
