eBay Solutions
Custom marketplace tools that streamline and scale your eBay business.
We build custom software that helps businesses innovate and optimize their eBay operations. Automated listing tools, real-time inventory sync, and custom analytics, we create solutions that transform how you sell on eBay.
Quick Overview
Timeline
4-24 weeks
Starting At
$6,000
Capabilities
12 core capabilities
Engagement
Free consultation
Overview
What We Do & Why It Matters
eBay is still one of the top global marketplaces by gross merchandise volume, with particular strength in categories like auto parts, collectibles, refurbished electronics, industrial equipment, luxury watches, and trading cards that Amazon has never fully captured. We have spent years building custom software for high-volume eBay sellers, multi-channel merchants running eBay alongside Shopify and Amazon, and specialty resellers whose entire business lives on eBay. The sellers who win on eBay at scale are the ones with tooling that eBay's native interface and generic listing tools cannot match.
Our eBay practice is built on two primary APIs. The modern eBay REST APIs including Inventory, Account, Fulfillment, Sell Marketing, Commerce Catalog, Commerce Taxonomy, and Buy Browse give us most of what we need for new integrations. The legacy eBay Trading API, despite being long in the tooth, still covers operations that the REST APIs have not fully replaced and remains essential for bulk listing, category-specific attributes, and fine-grained fee calculation. We also use the Finding API and Terapeak Research API for sold and completed listing data, which is gold for pricing strategy and item research.
Bulk listing is where most eBay sellers lose the most time. A high-volume reseller listing 500 to 5,000 items a week through eBay's native Seller Hub or generic listing tools like Inkfrog or SixBit spends disproportionate time on data entry that should be automated. We build custom listing pipelines tailored to your specific catalog shape, including flat-file CSV intake from supplier spreadsheets, photo association rules, item-specifics mapping for each category, dynamic title generation with keyword optimization, price calculation with fee-aware margin protection, and scheduled listing to hit optimal timing for your buyer base.
Sold and completed lookup is a superpower that most eBay sellers underuse. Being able to pull the last 90 days of sold listings for any ASIN or item ID, analyze sell-through rates at different price points, identify seasonal patterns, and price new listings against real market data is the difference between hitting sell-through targets and watching inventory age. We build pricing tools that integrate Terapeak sold data directly into your listing workflow, including market-based pricing suggestions, dynamic competitive pricing for long-tail SKUs, and profit-optimized bid starts for auction-format listings.
Cross-platform inventory sync is critical for anyone running eBay alongside Amazon, Shopify, Walmart, or their own DTC storefront. Overselling on eBay costs you seller rating, defect rate, and eBay Money Back Guarantee claims that can push you out of Top Rated Seller status. We build inventory hubs that treat each channel as a consumer of a single source of truth, with sub-minute sync, safety-stock rules per channel, and reservation logic that prevents overselling even during flash sales.
Repricing on eBay works differently from Amazon because eBay's Best Match algorithm does not have a Buy Box. Instead, ranking is driven by sell-through rate, price competitiveness, listing quality, seller reputation, shipping speed, and return policy. We build repricing tools that optimize within eBay's Best Match signals rather than racing to the lowest price, including scheduled price adjustments for aging inventory, Promoted Listings Standard bid optimization, Promoted Listings Advanced campaign management, and Offers to Buyers automation for converting watchers into sales.
Returns and customer service on eBay is a compliance-driven discipline because eBay's Service Metrics directly impact your Top Rated Seller status and Promoted Listings visibility. We build automation for return authorization, defect rate monitoring, Item Not Received dispute handling, negative feedback detection and response, and customer message templating that keeps response times under eBay's 24-hour SLA. Clients who run our tooling typically maintain Above Standard or Top Rated Seller status even during high-volume growth, which is directly worth 10 percent fee discount and boosted search ranking.
Capabilities
What We Deliver
eBay REST and Trading API Integration
Full integration with eBay Inventory API, Fulfillment API, Account API, Sell Marketing API, Commerce Catalog API, the legacy Trading API for bulk operations, the Finding API, and Terapeak Research API, with OAuth application registration, token refresh handling, regional endpoint routing for US, UK, DE, AU, and other marketplaces, and rate limit management.
Bulk Listing Automation
Template-based listing creation from CSV or supplier feeds, photo association with automated background removal through remove.bg or Photoroom, item-specifics mapping by category, dynamic title generation with keyword-density optimization, fee-aware margin-protected pricing, scheduled listings for optimal timing, and automated relisting of expired or ended items.
Sold and Completed Item Research
Integration with Terapeak Research API and Finding API for sold, active, and completed listings, with market-price suggestions at the SKU level, sell-through rate analysis, seasonal pattern detection, velocity benchmarking, and competitor catalog monitoring integrated directly into your pricing and listing workflow.
Cross-Platform Inventory Sync
Real-time inventory synchronization between eBay, Amazon, Shopify, Walmart Marketplace, Etsy, TikTok Shop, and your WMS or ERP, with sub-60-second sync, per-channel safety-stock rules, reservation logic to prevent overselling, and automated allocation between FBA, FBM, own-warehouse, and 3PL fulfillment.
Order Processing & Fulfillment Automation
Automated order routing, shipping label generation through ShipStation, ShipBob, or direct UPS, FedEx, and USPS APIs, tracking number upload via the Fulfillment API within eBay's Late Shipment threshold, buyer communication with eBay message templates, and integration with eBay's Global Shipping Program and eBay International Shipping.
Smart Repricing & Best Match Optimization
Repricing engines that optimize within eBay's Best Match signals rather than racing to the lowest price, including aging-inventory price reductions, Offers to Buyers automation for converting watchers, best-offer auto-accept and auto-decline rules, and scheduled promotions for seasonal patterns.
Promoted Listings Campaign Management
Custom tools for Promoted Listings Standard and Promoted Listings Advanced campaigns, including ad rate optimization by category and velocity tier, Trending Keywords surfacing for PL Advanced, placement-specific bid adjustments, budget pacing, and attribution reporting that reconciles to your margin data.
True-Profit Sales Analytics
Dashboards showing true profit per listing after final value fees, insertion fees, Promoted Listings spend, PayPal or Managed Payments fees, shipping cost, returns reserve, and landed COGS, reconciled against eBay's Financial Transactions API, with drill-downs by marketplace, category, listing format, and date range.
Returns, Defect Rate & Feedback Management
Automated return authorization based on your policy, defect rate monitoring against eBay's thresholds, Item Not Received dispute handling, negative feedback detection with alerting, feedback revision request automation, and response-time tracking to maintain sub-24-hour buyer message SLA for Top Rated Seller status.
eBay Store Design & Listing Templates
Custom eBay Store branding including storefront layout, custom category structure, responsive mobile-friendly listing description templates that pass eBay's active content restrictions, brand-consistent photography guidelines, and A-B testing of listing template variants for conversion lift.
Multi-Account and Multi-Marketplace Management
Tools for managing multiple eBay accounts legally under eBay's policies, international marketplace expansion including eBay US, UK, DE, AU, CA, IT, FR, and ES, per-marketplace pricing with FX and VAT handling, localized item specifics, and a unified P&L view across accounts.
Lot Manager & Auction Format Optimization
Specialized tooling for sellers running auction-format, multi-quantity lots, or classified ad listings, including bid-start calculation based on sold data, reserve pricing logic, auction scheduling for optimal day and time by category, and automated relist-if-sold workflows for fixed-price variants of sold auction items.
Real Results
How We've Helped Businesses Like Yours
A vintage clothing reseller listing 600 items per week was spending 30 hours on manual eBay data entry. We built a bulk listing pipeline that ingested photos from their studio workflow, auto-generated titles with category-appropriate keywords, mapped item specifics from a supplier catalog, and scheduled listings for optimal Sunday evening timing, cutting weekly listing work from 30 hours to 4 hours.
A multi-channel seller running 12,000 active eBay listings plus Amazon and Shopify was experiencing 80 to 120 overselling incidents per month during peak season. We built a real-time inventory hub syncing across all channels with 45-second refresh cycles and safety-stock rules, eliminating overselling incidents and cutting their defect rate from 3.2 percent to 0.4 percent.
A refurbished electronics seller with 4,000 active listings had no visibility into true profit after eBay final value fees, Managed Payments fees, Promoted Listings spend, and returns. We built a true-profit analytics dashboard reconciled against eBay's Financial Transactions API, revealing 15 percent of their SKUs were actually unprofitable and 8 percent were marginal. Portfolio pruning recovered $180k of annualized waste.
An auto-parts seller with a 45,000 SKU catalog needed to automate their Promoted Listings Standard campaigns. We built a campaign management tool that set ad rates by category velocity tier, adjusted for sell-through rate, and excluded SKUs below minimum margin, lifting Promoted Listings ROAS from 4.1x to 6.7x while maintaining promoted listing impression share.
A specialty book reseller with 80,000 active eBay listings needed to scale beyond what their team of four could manage manually. We built a catalog operations platform with Terapeak-backed pricing, automated relisting of ended items, aging-inventory markdown rules, and Offers to Buyers automation, letting them double their listing count without adding headcount.
A luxury watch dealer needed custom workflow for high-ASP auction listings with bid-start calculation, reserve pricing, and authentication integration. We built a listing workflow that pulled comparable sold data from Terapeak, suggested bid-start and reserve prices, integrated with their authentication partner's API, and managed the relist-if-not-sold cycle, lifting their sell-through rate on auction-format listings by 18 percent.
A refurbished industrial equipment seller had a chronic problem with Item Not Received claims from buyers trying to scam them. We built a dispute handling workflow that pulled tracking data, photo proof of packaging, and signature confirmation on delivery, generated formatted responses for eBay Customer Service, and automated the appeal process, cutting INR claim loss rate from 4.3 percent to under 1 percent.
A Top Rated Seller needed to scale international sales to UK and Germany without losing Top Rated Plus status. We built a localization tool that translated listings through DeepL with per-category terminology glossaries, managed VAT-inclusive pricing with per-country FX, handled EU Extended Producer Responsibility compliance, and synced inventory in real time, adding $2.1M of international eBay revenue over 18 months.
A collectibles dealer needed specialized catalog management for graded trading cards with unique SKU-per-item characteristics. We built a PSA and BGS grade tracking system, automated listing creation from their intake photos, dynamic titles including grade and population data, and Terapeak-backed pricing adjusted for pop report trends, cutting their time-to-list on a new graded card from 15 minutes to under 90 seconds.
A high-volume reseller needed a tool to identify eBay arbitrage opportunities against Amazon and Walmart. We built a cross-channel price comparison tool that monitored their eBay catalog against source-of-inventory prices, flagged margin anomalies, and suggested listing updates when source costs shifted, catching about $40k a month of unrealized margin expansion opportunities.
A fashion reseller was losing sales to slow response times on buyer questions. We built an AI-assisted messaging tool that drafted responses from a template library, surfaced product information from the listing, routed complex questions to a human agent, and tracked response SLA, cutting average buyer message response time from 7 hours to 38 minutes and lifting their seller rating.
A niche automotive accessories brand needed to integrate eBay with their NetSuite ERP for a unified view of Amazon, eBay, and Shopify orders, inventory, and profitability. We built a bi-directional NetSuite integration with eBay Order sync, Fulfillment API tracking upload, inventory sync via NetSuite saved searches, and P&L reconciliation, eliminating the spreadsheet-based reconciliation their finance team had been doing for years.
Technology
Our Tech Stack
Our Process
How We Work
eBay Business Analysis & Opportunity Sizing
A one to two week audit of your current eBay operations, tools, listing volume, category mix, seller metrics, and pain points, delivered as a written report with a prioritized list of automation and tooling opportunities sized by estimated annualized impact.
eBay Developer Account & API Scope Design
eBay Developer Program registration, application approval for production access, data architecture design covering which APIs to use for which operations, rate limit budgeting, and a written architecture document reviewed with your team before implementation.
REST and Trading API Integration
OAuth setup for the REST APIs, token pair management for the Trading API, regional endpoint routing, rate-limit-aware request handling, error taxonomy, and scheduled sync jobs for Orders, Inventory, Financial Transactions, and Terapeak research data.
Custom Feature Development
Building your specific tools: dashboards in React, listing automation in Node.js or Python, background workers for long-running imports and bulk operations, and the data and business logic layers connecting your eBay operations to your ERP, WMS, Shopify, Amazon, and other systems.
Sandbox Testing & Validation
Testing against the eBay sandbox environment, category-specific edge case handling, dry-run validation of write operations before enabling them in production, and load testing on rate-limited endpoints to ensure reliability at your actual volume.
Production Launch & Monitoring
Production deployment, monitoring dashboards for API success rates, listing health, order sync freshness, seller metric trends, and business KPIs, alerting on rate limit exhaustion and seller metric regressions, and a defined rollback path for write operations that affect live listings.
Ongoing Optimization & Policy Adaptation
Iterative optimization based on operational data, adaptation to eBay's constant API and policy changes including the ongoing deprecation of the Trading API, expansion to additional marketplaces, and quarterly business reviews of the software's impact against your roadmap.
FAQ
Common Questions
Ready to Get Started?
Let's discuss your ebay solutions project. We'll review your requirements, answer your questions, and provide a clear proposal — no obligation, no pressure.
Projects starting at $6,000 · 4-24 weeks typical timeline